CN114336953A - Control method of energy router, central controller and energy router - Google Patents

Control method of energy router, central controller and energy router Download PDF

Info

Publication number
CN114336953A
CN114336953A CN202011062083.9A CN202011062083A CN114336953A CN 114336953 A CN114336953 A CN 114336953A CN 202011062083 A CN202011062083 A CN 202011062083A CN 114336953 A CN114336953 A CN 114336953A
Authority
CN
China
Prior art keywords
voltage
power module
voltage side
low
side capacitor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011062083.9A
Other languages
Chinese (zh)
Other versions
CN114336953B (en
Inventor
陈凯
王传川
李毅
张振兴
马亮
贾乐
陶斐
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China XD Electric Co Ltd
Xian XD High Voltage Apparatus Co Ltd
Original Assignee
China XD Electric Co Ltd
Xian XD High Voltage Apparatus Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China XD Electric Co Ltd, Xian XD High Voltage Apparatus Co Ltd filed Critical China XD Electric Co Ltd
Priority to CN202011062083.9A priority Critical patent/CN114336953B/en
Publication of CN114336953A publication Critical patent/CN114336953A/en
Application granted granted Critical
Publication of CN114336953B publication Critical patent/CN114336953B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems

Abstract

The invention provides a control method of an energy router, a central controller and the energy router, which are used for acquiring the switch states of all switches of the energy router and the communication states of all power modules, and acquiring a starting instruction for starting the energy router when the switch states indicate that all switches of the energy router are in a breaking state and the communication states indicate that all power modules are in a communication interruption state; if the starting instruction is a high-voltage side starting instruction, controlling a switch component in the energy router to complete high-voltage side charging and then complete low-voltage side charging; if the starting instruction is a low-voltage side starting instruction, controlling a switch component in the energy router to complete low-voltage side charging and then complete high-voltage side charging; the faulty power module is isolated during start-up. When the energy router is started, the energy router can be started from the high-voltage side or the low-voltage side, the power module with the fault is determined and isolated in the starting process, and normal starting is guaranteed, so that the starting stability and the starting reliability of the energy router are improved.

Description

Control method of energy router, central controller and energy router
Technical Field
The invention relates to the technical field of control, in particular to a control method of an energy router, a central controller and the energy router.
Background
With the development of energy technology, the conventional power system equipment cannot meet the access requirements of renewable energy power generation devices, energy storage equipment and various types of electric loads, and currently, an energy router formed based on a power electronic transformation technology is generally used for providing diversified electric interface forms for the new energy power generation devices and various types of loads.
At present, the energy router is limited by the voltage resistance and current carrying of power electronic devices, the research and application of the energy router mainly lie in a modular cascade technology, namely, the module cascade of low voltage and low power is utilized to meet the application requirements of high voltage and high power, and the energy router is used as a core device to be widely applied to energy internet. Therefore, how to ensure the starting stability and the starting reliability of the energy router is a problem to be solved urgently.
Disclosure of Invention
In view of this, embodiments of the present invention provide a control method for an energy router, a central controller, and an energy router, so as to improve start stability and start reliability of the energy router.
In order to achieve the above purpose, the embodiments of the present invention provide the following technical solutions:
the first aspect of the embodiment of the invention discloses a control method of an energy router, which is suitable for a central controller for controlling the energy router, wherein the energy router at least comprises a high-voltage side isolating switch, a high-voltage side starting circuit formed by connecting a first contactor and a first starting resistor in parallel, a low-voltage side starting circuit formed by connecting a second contactor and a second starting resistor in parallel, a low-voltage side circuit breaker and N power modules, N is a positive integer, the power modules at least comprise a bypass switch, a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, and the method comprises the following steps:
acquiring the switch states of all switches of the energy router and the communication states of all power modules;
when the switch state indicates that all switches of the energy router are in a breaking state and the communication state indicates that all power modules are in a communication interruption state, acquiring a starting instruction for starting the energy router, wherein the starting instruction is a high-voltage side starting instruction or a low-voltage side starting instruction;
if the starting instruction is a high-voltage side starting instruction, controlling a high-voltage side isolating switch, a second contactor and a bypass switch, charging a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, and isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor;
when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition, closing the first contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage, and closing the low-voltage side circuit breaker;
if the starting instruction is a low-voltage side starting instruction, controlling a low-voltage side circuit breaker, a first contactor and a bypass switch, charging a low-voltage side capacitor, a first high-voltage side capacitor and a second high-voltage side capacitor, and isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor;
and when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet preset voltage stability conditions, closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach preset rated voltages, and closing the high-voltage side isolating switch.
Preferably, if the start instruction is a high-voltage side start instruction, controlling a high-voltage side isolation switch, a second contactor, and a bypass switch, charging a first high-voltage side capacitor, a second high-voltage side capacitor, and a low-voltage side capacitor, and isolating all fault power modules in the power module according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor, and a third voltage of the low-voltage side capacitor, includes:
if the starting instruction is a high-voltage side starting instruction, closing a high-voltage side isolating switch and a second contactor, charging a first high-voltage side capacitor and a second high-voltage side capacitor of each power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor in real time;
determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages;
if the number of the first fault power modules is smaller than a number threshold, closing a bypass switch of the first fault power modules and isolating the first fault power modules;
charging a low-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time;
determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module;
if the sum of the number of the first fault power module and the second fault power module is smaller than the number threshold, closing a bypass switch of the second fault power module and isolating the second fault power module;
correspondingly, when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, the first contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the normal power module are adjusted to reach the preset rated voltage, and the low-voltage side circuit breaker is closed, including:
when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet a preset voltage stabilization condition, closing a first contactor;
and adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing a low-voltage side circuit breaker.
Preferably, if the start instruction is a low-voltage side start instruction, controlling the low-voltage side circuit breaker, the first contactor, and the bypass switch to charge the low-voltage side capacitor, the first high-voltage side capacitor, and the second high-voltage side capacitor, and isolating all fault power modules in the power module according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor, and a third voltage of the low-voltage side capacitor, includes:
if the starting instruction is a low-voltage side starting instruction, closing a low-voltage side circuit breaker and a first contactor, charging a low-voltage side capacitor of each power module, and collecting a third voltage of the low-voltage side capacitor in real time;
determining a first fault power module and a first normal power module in all the power modules according to the third voltage;
if the number of the first fault power modules is smaller than a number threshold, closing a bypass switch of the first fault power modules and isolating the first fault power modules;
charging a first high-voltage side capacitor and a second high-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor of the first normal power module in real time;
determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module;
if the sum of the number of the first fault power module and the second fault power module is smaller than the number threshold, closing a bypass switch of the second fault power module and isolating the second fault power module;
correspondingly, when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, the second contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the normal power module are adjusted to reach the preset rated voltage, and the high-voltage side isolating switch is closed, including:
when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet a preset voltage stabilization condition, closing a second contactor;
and adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing a high-voltage side isolating switch.
Preferably, the method further comprises the following steps:
and if the number of the first fault power modules is larger than or equal to the number threshold, or if the sum of the number of the first fault power modules and the number of the second fault power modules is larger than or equal to the number threshold, stopping starting the energy router.
Preferably, after closing the low-voltage side circuit breaker or after closing the high-voltage side disconnecting switch, the method further includes:
and if the abnormal state of the energy router is determined according to the switch state and the communication state, controlling the energy router to be switched from a starting mode to an operating mode.
A second aspect of an embodiment of the present invention discloses a central controller, where the central controller is configured to control an energy router, the energy router at least includes a high-side isolation switch, a high-side starting circuit formed by connecting a first contactor in parallel with a first starting resistor, a low-side starting circuit formed by connecting a second contactor in parallel with a second starting resistor, a low-side circuit breaker, and N power modules, where N is a positive integer, the power modules at least include a bypass switch, a first high-side capacitor, a second high-side capacitor, and a low-side capacitor, and the central controller includes:
the first acquisition unit is used for acquiring the switch states of all switches of the energy router and the communication states of all power modules;
a second obtaining unit, configured to obtain a start instruction for starting the energy router when the switch state indicates that all switches of the energy router are in a disconnection state and the communication state indicates that all power modules are in a communication interruption state, where the start instruction is a high-voltage side start instruction or a low-voltage side start instruction, execute the first processing unit if the start instruction is the high-voltage side start instruction, and execute the third processing unit if the start instruction is the low-voltage side start instruction;
the first processing unit is used for controlling a high-voltage side isolating switch, a second contactor and a bypass switch, charging a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor, and executing the second processing unit;
the second processing unit is used for closing the first contactor when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage, and closing the low-voltage side circuit breaker;
the third processing unit is used for controlling the low-voltage side circuit breaker, the first contactor and the bypass switch, charging a low-voltage side capacitor, a first high-voltage side capacitor and a second high-voltage side capacitor, isolating fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor, and executing a fourth processing unit;
and the fourth processing unit is used for closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage and closing the high-voltage side isolating switch when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition.
Preferably, the first processing unit includes:
the first processing subunit is used for closing a high-voltage side isolating switch and a second contactor if the starting instruction is a high-voltage side starting instruction, charging a first high-voltage side capacitor and a second high-voltage side capacitor of each power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor in real time;
the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages;
the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than a number threshold;
the second processing subunit is used for charging the low-voltage side capacitor of the first normal power module by using the first normal power module and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time;
a second determining subunit, configured to determine, according to the first voltage, the second voltage, and the third voltage corresponding to the first normal power module, a second faulty power module and a second normal power module in the first normal power module;
the second isolation subunit is configured to close the bypass switch of the second faulty power module and isolate the second faulty power module if the sum of the numbers of the first faulty power module and the second faulty power module is smaller than the number threshold;
correspondingly, the second processing unit is specifically configured to: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet preset voltage stability conditions, closing the first contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach preset rated voltages, and closing the low-voltage side circuit breaker.
Preferably, the third processing unit includes:
the first processing subunit is used for closing a low-voltage side circuit breaker and a first contactor if the starting instruction is a low-voltage side starting instruction, charging a low-voltage side capacitor of each power module, and acquiring a third voltage of the low-voltage side capacitor in real time;
the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to the third voltage;
the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than a number threshold;
the second processing subunit is used for charging a first high-voltage side capacitor and a second high-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor of the first normal power module in real time;
the second determining subunit is configured to determine, according to the first voltage, the second voltage, and the third voltage corresponding to the first normal power module, a second faulty power module and a second normal power module in the first normal power module;
the second isolation subunit is configured to close the bypass switch of the second faulty power module and isolate the second faulty power module if the sum of the numbers of the first faulty power module and the second faulty power module is smaller than the number threshold;
correspondingly, the fourth processing unit is specifically configured to: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet preset voltage stability conditions, closing a second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach preset rated voltages, and closing a high-voltage side isolating switch.
Preferably, the central controller further comprises:
and the switching unit is used for controlling the energy router to be switched from a starting mode to an operating mode if the abnormal state of the energy router is determined according to the switch state and the communication state.
A third aspect of an embodiment of the present invention discloses an energy router, where the energy router at least includes: the high-voltage side circuit breaker comprises a high-voltage side isolating switch, a high-voltage side starting circuit, a low-voltage side circuit breaker and N power modules, wherein the high-voltage side starting circuit is formed by connecting a first contactor and a first starting resistor in parallel;
a first direct-current bus positive port and a first direct-current bus negative port are respectively connected with a first input end and a second input end of the high-voltage side isolating switch, a first output end of the high-voltage side isolating switch is connected with the high-voltage side of a first power module through the high-voltage side starting circuit, and a second output end of the high-voltage side isolating switch is connected with the high-voltage side of an Nth power module;
the high-voltage sides among the N power modules are connected in series, and the low-voltage sides among the N power modules are connected in parallel;
the positive port of the second direct current bus and the negative port of the second direct current bus are respectively connected with the first input end and the second input end of the low-voltage side circuit breaker, the first output end of the low-voltage side circuit breaker is connected with the first end of the low-voltage side of the power module through the low-voltage side starting circuit, and the second output end of the low-voltage side circuit breaker is connected with the second end of the low-voltage side of the power module.
Based on the control method, the central controller and the energy router of the energy router provided by the embodiments of the present invention, the switch states of all switches and the communication states of all power modules of the energy router are obtained, and when the switch states indicate that all switches of the energy router are in the disconnection state and the communication states indicate that all power modules are in the communication disconnection state, a start instruction for starting the energy router is obtained; if the starting instruction is a high-voltage side starting instruction, controlling a switch component in the energy router to complete high-voltage side charging and then low-voltage side charging, and isolating a fault power module in the starting process; and if the starting instruction is a low-voltage side starting instruction, controlling a switch component in the energy router to firstly complete low-voltage side charging and then complete high-voltage side charging, and isolating the fault power module in the starting process. When the energy router is started, the energy router can be started from the high-voltage side or the low-voltage side of the energy router, the power module with the fault is determined and isolated in the starting process, the energy router can be ensured to be started normally, and the starting stability and the starting reliability of the energy router are improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an energy router according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a connection between a central controller and an energy router according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of an energy router according to an embodiment of the present invention;
FIG. 4 is a flow chart of a high side startup and isolation fault power module provided by an embodiment of the present invention;
FIG. 5 is a flow chart of a low side startup and isolation fault power module according to an embodiment of the present invention;
fig. 6 is a block diagram of a central controller according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As can be known from the background art, the current application of the energy router is mainly a modular cascade technology, and the energy router is usually applied to the energy internet as a core device, so how to ensure the starting stability and starting reliability of the energy router is a problem that needs to be solved urgently.
Therefore, an embodiment of the present invention provides a control method for an energy router, a central controller, and an energy router, where when the energy router is started, a start operation may be performed from a high-voltage side or a low-voltage side of the energy router, and a failed power module is determined and isolated in a start process, so as to ensure that the energy router can continue to be started normally, so as to improve start stability and start reliability of the energy router.
It should be noted that the energy router according to the embodiment of the present invention may also be referred to as a solid-state transformer, a dc transformer, an electronic power transformer, or the like according to different application scenarios.
Referring to fig. 1, there is shown an architecture diagram of an energy router provided in an embodiment of the present invention, where the energy router includes: high-side disconnecting switch (QF in figure 1)H) From a first contactor (KM in FIG. 1)H) And a first starting resistor (R in FIG. 1)H) A high-voltage side starting circuit formed by parallel connection and composed of a second contactor (KM in figure 1)L) And a second starting resistor (R in FIG. 1)L) A low-voltage side starting circuit and a low-voltage side circuit breaker (QF in figure 1) which are formed in parallelL) N sets of switches at least comprise bypass switches (K in figure 1)1-KN) A first high-side capacitor (C in FIG. 1)11-CN1) A second high-side capacitor (C in FIG. 1)12-CN2) And low side capacitance (C in FIG. 1)10-CN0) N is a positive integer (power module #1 to power module # N).
A positive port (+10kV by way of example only) and a negative port (-10kV by way of example only) of the first direct current bus are respectively connected with a high-voltage side disconnecting switch (QF)H) The first output end of the high-voltage side isolating switch is connected with the high-voltage side of the first power module through the high-voltage side starting circuit, and the second output end of the high-voltage side isolating switch is connected with the high-voltage side of the Nth power module.
The high-voltage sides among the N power modules are connected in series, and the low-voltage sides among the N power modules are connected in parallel.
The positive port (+375V for example only) and the negative port (-375V for example only) of the second DC bus are connected with the low-voltage side breaker QFLThe first output end of the low-voltage side circuit breaker is connected with the first end of the low-voltage side of the first power module through the low-voltage side starting circuit, and the second output end of the low-voltage side circuit breaker is connected with the second end of the low-voltage side of the first power module.
It is understood that the power module further includes 4 switch modules, a high-side sub-module (SM in fig. 1) in the high-side power unit1H-SMNH) An intermediate frequency transformer (MFT 1-MFTN in FIG. 1) and a low side sub-module (SM in FIG. 1) in a low side power unit1L-SMNL)。
It should be noted that the high-voltage side power unit is composed of a bypass switch, 4 switch modules, a first high-voltage side capacitor, a second high-voltage side capacitor and a high-voltage side submodule, and the low-voltage side power unit is composed of a low-voltage side submodule and a low-voltage side capacitor.
It should be further noted that the types of the high-voltage side sub-module and the low-voltage side sub-module may be any one of a half-bridge sub-module, a full-bridge sub-module, and a clamping sub-module, and the types of the high-voltage side sub-module and the low-voltage side sub-module are not specifically limited.
The 4 switch modules are respectively the first switch module (Q in FIG. 1)11-QN1) A second switch module (Q in FIG. 1)12-QN2) A third switch module (Q in FIG. 1)13-QN3) And a fourth switching module (Q in FIG. 1)14-QN4) Each switch module is obtained by integrating an Insulated Gate Bipolar Transistor (IGBT) and a diode, and the connection relationship of components in each switch module (integrating the IGBT and the diode) is as follows: the emitter of the IGBT is connected with the anode of the diode, and the collector of the IGBT is connected with the cathode of the diode.
The first output end of the high-voltage side isolating switch is respectively connected with a bypass switch (K) of the first power module through a high-voltage side starting circuit1) First terminal, first switch module (Q)11) And a second switch module (Q)12) Is connected to the collector of the first power module, a bypass switch (K) of the first power module1) Second terminal and third switch module (Q)13) Is connected to the emitter.
The first output end of the low-voltage side circuit breaker is connected with the low-voltage side capacitor (C) of the first power module through the low-voltage side starting circuit10) Is connected with the second output end of the low-voltage side circuit breaker and the low-voltage side capacitor (C) of the first power module10) Is connected to the second end of the first housing.
Taking the first power module as an example, the connection relationship of the internal components of each power module is explained, namely, in the first power module, the first switch module (Q)11) Respectively with the first high-side capacitance (C)11) Positive and high voltage side sub-modules (SM)1H) Is connected to the first end of the first switch module, and the emitters of the first switch module are respectively connected to the bypass switches (K)1) And a second switch module (Q)12) Is connected to the collector of (a).
Emitter of the second switch module and the third switch module (Q)13) Is connected with the collector of the third switch module, and the emitter of the third switch module is respectively connected with the bypass switch (K)1) And a fourth switch module (Q)14) Is connected with the collector of the fourth switch module, and the emitter of the fourth switch module is respectively connected with the second high-voltage side capacitor (C)12) Is connected with the third end of the high-voltage side sub-module.
And the second end of the high-voltage side sub-module is respectively connected with the emitter of the second switch module, the cathode of the first high-voltage side capacitor and the anode of the second high-voltage side capacitor.
The fourth terminal of the high-voltage side sub-module is connected with the first terminal of the intermediate frequency transformer (MFT1), and the second terminal of the intermediate frequency transformer is connected with the low-voltage side sub-module (SM)1L) Is connected with the first end of the low-voltage side sub-module, and the second end of the low-voltage side sub-module is connected with the low-voltage side capacitor (C)10) And (4) connecting in parallel.
It can be understood that, the connection diagram of the internal components of other power modules can refer to the content of the first power module, which is not described herein again, and the connection relationship between the power modules is that the high-voltage sides are connected in series and the low-voltage sides are connected in parallel.
In the embodiment of the present invention, the state of each component in the energy router is controlled by the central controller, and in order to better explain a connection relationship between the central controller and the components of the energy router, the connection relationship is explained by referring to fig. 2 in conjunction with the content of fig. 1, it should be noted that fig. 2 is only used for example.
Referring to fig. 2, a schematic diagram of a connection between a central controller and an energy router provided in an embodiment of the present invention is shown.
The central controller is respectively connected with the first contactor (KM)H) High-voltage side isolating switch (QF)H) Each power module (including a bypass switch), a second contactor (KM)L) And low-voltage side circuit breaker (QF)L) And (4) connecting. Wherein the solid bold lines without arrows indicate cable monitoring and the solid thin lines with arrows indicate fiber optic communications.
It can be understood that there is a corresponding controller in the power module, and the power module is controlled by the controller of the power module, and the controller of each power module is divided into a high-voltage side control unit and a low-voltage side control unit.
The power supply mode of the high-voltage side control unit and the low-voltage side control unit in each power module is self-powered, namely the high-voltage side control unit obtains voltage through the first high-voltage side capacitor and the second high-voltage side capacitor to ensure the normal operation of the high-voltage side control unit, and the low-voltage side control unit obtains voltage through the low-voltage side capacitor to ensure the normal operation of the low-voltage side control unit.
And the power supply modes of other switches and components supply power to the external power supply.
The power supply modes of the components are also described as examples, and the specific power supply modes can be set according to actual situations.
Referring to fig. 3, a flowchart of a control method of an energy router provided by an embodiment of the present invention is shown, the control method is suitable for controlling a central controller of the energy router, and a specific architecture of the energy router is shown in fig. 1, where the control method includes:
step S301: and acquiring the switch states of all switches of the energy router and the communication states of all power modules.
It should be noted that, after the central controller is started, the central controller performs self-checking on the state of the central controller, and after the self-checking on the state has no fault, the central controller performs related control on the energy router.
In the process of implementing step S301 specifically, the switch states of all switches of the energy router are obtained, and the switch states may indicate whether the switches are in a closed state or an open state.
As can be seen from the above description of fig. 2, the power modules are controlled by the controllers (the high-voltage side control unit and the low-voltage side control unit) of each power module, so that the communication states of the high-voltage side control unit and the low-voltage side control unit of each power module are obtained, the communication state of the high-voltage side control unit can indicate whether the high-voltage side control unit is in the communication interruption state, and the communication state of the low-voltage side control unit can indicate whether the low-voltage side control unit is in the communication interruption state.
Step S302: and when the switch state indicates that all switches of the energy router are in a breaking state and the communication state indicates that all power modules are in a communication interruption state, acquiring a starting instruction for starting the energy router. If the start command is a high-voltage side start command, step S303 is executed, and if the start command is a low-voltage side start command, step S305 is executed.
It should be noted that, when the energy router is started, all switches of the energy router need to be in an open state, and all the high-voltage side control units and the low-voltage side control units need to be in a communication interruption state (i.e., all the power modules are in a communication interruption state).
And if the switch of the energy router is in the closed state before starting, the switch in the closed state is disconnected, so that the energy router is in the breaking state.
In the process of specifically implementing step S302, when all switches of the energy router are in the disconnection state, and all the high-voltage side control units and the low-voltage side control units are in the communication interruption state, a start instruction for starting the energy router is obtained.
It can be understood that the start instruction is a high-voltage side start instruction or a low-voltage side start instruction, that is, if the start instruction is the high-voltage side start instruction, the energy router is started from the high-voltage side of the energy router, and if the start instruction is the low-voltage side start instruction, the energy router is started from the low-voltage side of the energy router.
Step S303: and if the starting instruction is a high-voltage side starting instruction, controlling the high-voltage side isolating switch, the second contactor and the bypass switch, charging the first high-voltage side capacitor, the second high-voltage side capacitor and the low-voltage side capacitor, and isolating fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor.
As can be seen from the above description of fig. 2, the high-voltage side control unit in the power module performs self-power-up starting through the first high-voltage side capacitor and the second high-voltage side capacitor, and the low-voltage side control unit performs self-power-up starting through the low-voltage side capacitor.
In the process of implementing step S303, if the start instruction is a high-voltage-side start instruction, the high-voltage-side energy router is instructed to start from the high-voltage side, the high-voltage-side isolation switch and the second contactor of the low-voltage-side start circuit are closed, the second start resistor of the low-voltage-side start circuit is short-circuited, the first high-voltage-side capacitor and the second high-voltage-side capacitor of each power module are charged through the first resistor of the high-voltage-side start circuit, and the high-voltage-side control units of each power module are started, so that the high-voltage-side control units of each power module establish communication with the central controller.
It is understood that after the high side control unit establishes communication with the central controller, a faulty power module in each power module is determined and fault isolation is performed by closing the bypass switch of the faulty power module using the first voltage of the first high side capacitor and the second voltage of the second high side capacitor of each power module.
The low-voltage side capacitor is charged by controlling the high-voltage side control unit and the low-voltage side sub-module in the first normal power module (the normal power module after fault isolation is performed on all the power modules by using the first voltage and the second voltage), so that the low-voltage side control unit in the first normal power module is started, and the low-voltage side control unit in the first normal power module is communicated with the central controller.
After the low-voltage side control unit in the first normal power module establishes communication with the central controller, the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor of the first normal power module are used for determining fault power modules in the first normal power modules, and fault isolation is carried out by closing bypass switches of the fault power modules.
That is, if the start instruction is a high-voltage side start instruction, the high-voltage side control unit is started, then fault isolation is performed on all the power modules by using the first voltage and the second voltage (at this time, the normal power module after fault isolation is the first normal power module), and then the low-voltage side control unit in the first normal power module is started.
After the low-voltage side control unit in the first normal power module is started, fault isolation is performed on all the first normal power modules by using the first voltage, the second voltage and the second voltage, and fault power modules in all the first normal power modules are isolated.
Step S304: when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, the first contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the normal power module are adjusted to reach the preset rated voltage, and the low-voltage side circuit breaker is closed.
In the process of implementing step S304 specifically, after fault isolation is performed on all the first normal power modules, when the first voltage, the second voltage, and the third voltage of the second normal power module (the normal power module after fault isolation is performed on all the first normal power modules) meet a preset voltage stabilization condition, indicating that charging on the high-voltage side of the energy router is completed, the first contactor of the second normal power is closed to short-circuit the first starting resistor of the high-voltage side starting circuit. And adjusting the duty ratio of a preceding stage IGBT of a high-voltage side control unit of the second normal power module, enabling the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing the low-voltage side circuit breaker.
Step S305: and if the starting instruction is a low-voltage side starting instruction, controlling the low-voltage side circuit breaker, the first contactor and the bypass switch, charging the low-voltage side capacitor, the first high-voltage side capacitor and the second high-voltage side capacitor, and isolating fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor.
In the process of implementing step S305 specifically, if the start instruction is a low-voltage side start instruction, the start instruction instructs to start the energy router from the low-voltage side, close the low-voltage side circuit breaker and the first contactor of the high-voltage side start circuit, short-circuit the first start resistor of the high-voltage side start circuit, first charge the low-voltage side capacitor of each power module through the second resistor of the low-voltage side start circuit, and start the low-voltage side control unit of each power module, so that the low-voltage side control unit of each power module establishes communication with the central controller.
It can be understood that, after the low-voltage side control unit of each power module establishes communication with the central controller, a fault power module in each power module is determined by using the third voltage of the low-voltage side capacitor of each power module, and fault isolation is performed by closing the bypass switch of the fault power module.
The first high-voltage side capacitor and the second high-voltage side capacitor are charged by controlling the low-voltage side control unit and the high-voltage side sub-module in the first normal power module (the normal power module after fault isolation is performed on all the power modules by using the third voltage), so that the high-voltage side control unit of the first normal power module is started, and the high-voltage side control unit of the first normal power module is communicated with the central controller.
After the high-voltage side control unit of the first normal power module establishes communication with the central controller, the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor of the first normal power module are used for determining fault power modules in the first normal power modules, and fault isolation is carried out by closing bypass switches of the fault power modules.
That is, if the start instruction is a low-voltage side start instruction, the low-voltage side control unit is started, and then fault isolation is performed on all the power modules by using the third voltage (at this time, the normal power module after fault isolation is the first normal power module), and then the high-voltage side control unit in the first normal power module is started.
After the high-voltage side control unit in the first normal power module is started, fault isolation is performed on all the first normal power modules by using the first voltage, the second voltage and the second voltage, and fault power modules in all the first normal power modules are isolated.
Step S306: and when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach the preset rated voltage, and closing the high-voltage side isolating switch.
In the process of implementing step S306 specifically, after fault isolation is performed on all the first normal power modules, when the first voltage, the second voltage, and the third voltage of the second normal power module (the normal power module after fault isolation is performed on all the first normal power modules) meet a preset voltage stabilization condition, indicating that charging on the low-voltage side of the energy router is completed, closing the second contactor of the second normal power module to short-circuit the second starting resistor of the low-voltage side starting circuit, adjusting the duty ratio of the preceding stage IGBT of the high-voltage side control unit of the second normal power module, so that the first voltage, the second voltage, and the third voltage corresponding to the second normal power module reach a preset rated voltage, and closing the high-voltage side isolation switch.
It should be noted that, in the process of starting the energy router, if the switch position of any one (or more) switches is monitored to be abnormal according to the switch states of all the switches, the starting of the energy router is stopped, and an alarm message is sent to a specified device (such as a front end display).
The switch position abnormality designation is: for a switch, the switch should be in the open state during the startup of the energy router, but the switch is monitored to be in the closed state according to the switch states of all switches.
Preferably, as can be seen from the foregoing, the control of each switch, the high-voltage side control unit and the low-voltage side control unit is involved in the process of executing the above steps S303 and S304, or in the process of executing the above steps S305 and S306. Therefore, after the step S304 or the step S306 is executed, if it is determined that the energy router has no abnormal state according to the switch state and the communication state, the energy router is controlled to switch from the startup mode to the running mode.
It should be noted that the abnormal-free state of the energy router means: the switch state is matched with the control content for controlling each switch, and the communication state is matched with the control content for controlling each high-voltage side control unit and each low-voltage side control unit.
In the embodiment of the invention, when the energy router is started, the high-voltage side or the low-voltage side of the energy router can be selected to carry out starting operation by controlling the states of all components of the energy router, and the power module with a fault is determined and isolated in the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
In the above embodiment of the present invention, referring to fig. 4, the content of starting the energy router when the start instruction related to step S303 in fig. 3 is a high-voltage side start instruction is shown, which shows a flowchart of starting and isolating the fault power module at the high-voltage side according to the embodiment of the present invention, and includes the following steps:
step S401: if the starting instruction is a high-voltage side starting instruction, the high-voltage side isolating switch and the second contactor are closed, the first high-voltage side capacitor and the second high-voltage side capacitor of each power module are charged, and the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor are collected in real time.
In the process of implementing step S401 specifically, if the start instruction is a high-voltage-side start instruction, the second contactors of the high-voltage-side isolation switch and the low-voltage-side start circuit are closed, and the first high-voltage-side capacitor and the second high-voltage-side capacitor of each power module are charged through the first start resistor of the high-voltage-side start circuit of each power module.
For each power module, when the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor of the power module rise to a preset percentage specified voltage (for example, rise to 16% to 40% of the specified voltage), the high-voltage side control unit of the power module starts up and establishes communication with the central controller, and the started high-voltage side control unit sends the first voltage and the second voltage to the central controller in real time.
Step S402: and determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages.
In the process of implementing step S402 specifically, after the central controller determines that all the high-voltage-side control units are stable in communication according to the communication states of all the high-voltage-side control units, the central controller determines a first faulty power module and a first normal power module in all the power modules by using all the first voltages and all the second voltages.
It is understood that, under normal operating conditions (where all power modules are normal), the error between the first voltages of the respective power modules is not greater than a preset percentage (e.g., 2%), and the error between the second voltages of the respective power modules is not greater than the preset percentage, i.e., the first voltages between the respective power modules are substantially the same, and the second voltages between the respective power modules are substantially the same.
Therefore, for a power module, whether the power module fails or not is judged through two judgment conditions, wherein the first judgment condition is whether the communication state of the high-voltage side control unit of the power module is normal or not. The second judgment condition is as follows: whether the error between the first voltage of the power module and the first voltages of the other power modules is greater than a preset percentage or not, and whether the error between the second voltage of the power module and the second voltages of the other power modules is greater than a preset percentage or not.
That is, for a power module, if the communication state of the high-voltage side control unit of the power module is abnormal, and/or an error between the first voltage of the power module and the first voltages of other power modules is greater than a preset percentage, and/or an error between the second voltage of the power module and the second voltages of other power modules is greater than a preset percentage, the power module is indicated as a first failed power module.
In the process of specifically implementing step S402, a first faulty power module and a first normal power module are determined from all the power modules according to all the first voltages and all the second voltages.
Step S403: it is determined whether the number of first failed power modules is less than a number threshold. If the number of the first failed power modules is greater than or equal to the number threshold, step S404 is executed, and if the number of the first failed power modules is less than the number threshold, step S405 is executed.
The preset configuration of the redundancy number (number threshold) of a failed power module means that the energy router can continue to be normally started when the number of failed power modules in the energy router is less than the number threshold. In the process of implementing step S403 specifically, it is determined whether the number (which may be 0) of the first failed power modules is smaller than a number threshold, if the number of the first failed power modules is smaller than the number threshold, the energy router continues to be started, and if the number of the first failed power modules is greater than or equal to the number threshold, the process of starting the energy router is terminated.
Step S404: the start of the energy router is suspended.
Step S405: and closing the bypass switch of the first fault power module and isolating the first fault power module.
In the process of implementing step S405 specifically, the number of the first faulty power modules is smaller than the number threshold, and the first faulty power module is cut off and exits from the device operation by closing the bypass switch of the first faulty power module, that is, the first faulty power module is isolated.
Step S406: and charging the low-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time.
In the process of implementing step S406 specifically, for each first normal power module, the high-side control unit is used to convert the voltage to the low-side sub-module, so as to charge the low-side capacitor of the first normal power module.
Specifically, the process of charging the low-voltage side capacitor is as follows: the method comprises the steps of issuing a conversion instruction to a high-voltage side control unit, converting direct-current voltage into alternating-current voltage by the high-voltage side control unit through controlling the on and off of an IGBT (insulated gate bipolar transistor) of a high-voltage side sub-module, converting the voltage grade of the alternating-current voltage (the charging voltage grade corresponding to a low-voltage side capacitor) by using an intermediate frequency transformer, and converting the alternating-current voltage after the voltage grade is converted into the direct-current voltage by a low-voltage side sub-module, so that the low-voltage side capacitor is charged.
For each first normal power module, when the third voltage of the low-side capacitor of the first normal power module rises to a preset percentage of the designated voltage (for example, to 24% to 40% of the designated voltage), the low-side control unit of the first normal power module starts and establishes communication with the central controller, and the low-side control unit sends the third voltage of the first normal power module to the central controller in real time.
Step S407: and determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module.
In the process of specifically implementing step S407, after the central controller determines that the communication between the high-voltage side control unit and the low-voltage side control unit of all the first normal power modules is stable, the central controller determines a second faulty power module and a second normal power module in the first normal power module by using the first voltage, the second voltage, and the third voltage corresponding to all the first normal power modules.
It can be understood that, in conjunction with the content of the above step S402, for a first normal power module, whether the first normal power module is faulty or not is determined by two determination conditions, where the first determination condition is whether the communication state of the high-voltage side control unit and the low-voltage side control unit of the first normal power is normal or not.
The second judgment condition is as follows: whether an error between the first voltage of the first normal power module and the first voltages of the other first normal power modules is greater than a preset percentage, whether an error between the second voltage of the first normal power module and the second voltages of the other first normal power modules is greater than a preset percentage, and whether an error between the third voltage of the first normal power module and the third voltages of the other first normal power modules is greater than a preset percentage.
In the process of implementing step S407 specifically, a second faulty power module and a second normal power module are determined from the first normal power modules according to the first voltage, the second voltage, and the third voltage corresponding to all the first normal power modules.
For details, reference may be made to the content of step S402 for how to determine the content of the second failed power module in the first normal power module, which is not described herein again.
Step S408: and judging whether the sum of the number of the first fault power module and the second fault power module is less than a number threshold value. If the sum of the numbers of the first faulty power module and the second faulty power module is less than the number threshold, step S409 is executed, and if the sum of the numbers of the first faulty power module and the second faulty power module is greater than or equal to the number threshold, step S404 is executed.
In the process of implementing step S408 specifically, it is determined whether the sum of the numbers of the first failed power module and the second failed power module is smaller than the number threshold, that is, it is determined whether the total number of the failed power modules of the energy router is smaller than the number threshold.
If the sum of the number of the first fault power module and the number of the second fault power module is smaller than the number threshold, indicating that the energy router can be continuously started, closing the bypass switch of the second fault power module, and isolating the second fault power module, wherein, by combining the above contents, the bypass switch of the first fault power module is closed, that is, the first fault power module is isolated.
And if the sum of the number of the first fault power module and the number of the second fault power module is larger than or equal to the number threshold, indicating that the energy router cannot be started continuously, and stopping the process of starting the energy router.
Step S409: and closing the bypass switch of the second fault power module and isolating the second fault power module.
Preferably, after step S409 is executed, the specific execution content of step S304 in fig. 3 in the embodiment of the present invention is as follows: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet the preset voltage stability condition, the high-voltage side is indicated to be charged, and the first contactor is closed to enable the first starting resistor to be in short circuit. The first voltage, the second voltage, and the third voltage corresponding to the second normal power module are adjusted to reach the preset rated voltage, and the low-voltage side circuit breaker is closed, specifically, how to adjust the first voltage, the second voltage, and the third voltage of the second normal power module to reach the preset rated voltage is described in step S304 in fig. 3 of the embodiment of the present invention.
In the embodiment of the invention, if the starting instruction is a high-voltage side starting instruction, the high-voltage side of the energy router starts to start by controlling the states of all components of the energy router, and the power module is judged and isolated for multiple times during the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
In the above embodiment of the present invention, referring to fig. 5, the content of starting the energy router when the start instruction related to step S305 in fig. 3 is a low-voltage side start instruction is shown, which shows a flowchart of starting and isolating the fault power module at the low-voltage side according to the embodiment of the present invention, and includes the following steps:
step S501: if the starting instruction is a low-voltage side starting instruction, the low-voltage side circuit breaker and the first contactor are closed, the low-voltage side capacitor of each power module is charged, and the third voltage of the low-voltage side capacitor is collected in real time.
In the process of implementing step S501 specifically, if the start instruction is a low-voltage side start instruction, the low-voltage side circuit breaker and the first contactor of the high-voltage side start circuit are closed, and the low-voltage side capacitor of each power module is charged through the second start resistor of the low-voltage side start circuit of each power module.
For each power module, when the third voltage of the low-voltage side capacitor of the power module rises to a preset percentage specified voltage (for example, to 24% to 40% specified voltage), the low-voltage side control unit of the power module starts and establishes communication with the central controller, and the started low-voltage side control unit sends the third voltage to the central controller in real time.
Step S502: and determining a first fault power module and a first normal power module in all the power modules according to the third voltage.
In the process of implementing step S502 specifically, after the central controller determines that the communication of all the low-voltage side control units is stable according to the communication states of all the low-voltage side control units, the central controller determines a first faulty power module and a first normal power module in all the power modules by using all the third voltages.
It can be understood that, in combination with the above description of step S402 in fig. 4 according to the embodiment of the present invention, under a normal operating condition, an error between the third voltages of the power modules is not greater than a preset percentage, that is, the third voltages of the power modules are substantially the same.
Therefore, for a power module, whether the power module fails or not is judged through two judgment conditions, wherein the first judgment condition is whether the communication state of the low-voltage side control unit of the power module is normal or not. The second judgment condition is whether an error between the third voltage of the power module and the third voltages of the other power modules is greater than a preset percentage (e.g., 2%).
That is, for a power module, if the communication state of the high-voltage side control unit of the power module is abnormal, and/or an error between the third voltage of the power module and the third voltages of other power modules is greater than a preset percentage, the power module is indicated as a first failed power module.
Step S503: it is determined whether the number of first failed power modules is less than a number threshold. If the number of the first failed power modules is greater than or equal to the number threshold, step S504 is executed, and if the number of the first failed power modules is less than the number threshold, step S505 is executed.
In the process of implementing step S503 specifically, it is determined whether the number of the first failed power modules is less than the number threshold, if the number of the first failed power modules is less than the number threshold, the energy router continues to be started, and if the number of the first failed power modules is greater than or equal to the number threshold, the process of starting the energy router is terminated.
Step S504: the start of the energy router is suspended.
Step S505: and closing the bypass switch of the first fault power module and isolating the first fault power module.
In the process of implementing step S505 specifically, the number of the first faulty power modules is smaller than the number threshold, and the bypass switch of the first faulty power module is closed, so that the first faulty power module is cut off and exits from the device operation, that is, the first faulty power module is isolated.
Step S506: the first high-voltage side capacitor and the second high-voltage side capacitor of the first normal power module are charged by the first normal power module, and the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor of the first normal power module are collected in real time.
In the process of implementing step S506 specifically, for each first normal power module, the low-voltage side control unit is used to convert the voltage to the high-voltage side sub-module, so as to charge the first high-voltage side capacitor and the second high-voltage side capacitor of the first normal power module.
The process of charging the first high-voltage side capacitor and the second high-voltage side capacitor is as follows: the method comprises the steps of issuing a conversion instruction to a low-voltage side control unit, converting direct-current voltage into alternating-current voltage by the low-voltage side control unit through controlling the on and off of an IGBT (insulated gate bipolar transistor) of a low-voltage side sub-module, converting the voltage grade of the alternating-current voltage (the charging voltage grade corresponding to a first high-voltage side capacitor and a second high-voltage side capacitor) by using an intermediate frequency transformer, converting the alternating-current voltage after the voltage grade is converted into the direct-current voltage by a high-voltage side sub-module, and charging the first high-voltage side capacitor and the second high-voltage side capacitor.
For each first normal power module, when the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor of the first normal power module rise to a preset percentage of the designated voltage (for example, rise to 16% to 40% of the designated voltage), the high-voltage side control unit of the first normal power module starts and establishes communication with the central controller, and the high-voltage side control unit sends the first voltage and the second voltage of the first normal power module to the central controller in real time.
Step S507: and determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module.
In the process of specifically implementing step S507, after determining that the communication between the high-voltage side control unit and the low-voltage side control unit of all the first normal power modules is stable, the central controller determines a second faulty power module and a second normal power module in the first normal power module by using the first voltage, the second voltage, and the third voltage corresponding to all the first normal power modules.
For details of the process of determining the second faulty power module, refer to the content of step S407 in fig. 4 in the embodiment of the present invention, and are not described herein again.
Step S508: and judging whether the sum of the number of the first fault power module and the second fault power module is less than a number threshold value. If the sum of the numbers of the first failed power module and the second failed power module is less than the number threshold, step S509 is executed, and if the sum of the numbers of the first failed power module and the second failed power module is greater than or equal to the number threshold, step S504 is executed again.
In the process of implementing step S508 specifically, it is determined whether the sum of the numbers of the first failed power module and the second failed power module is smaller than the number threshold, that is, it is determined whether the total number of the failed power modules of the energy router is smaller than the number threshold.
If the sum of the number of the first fault power module and the number of the second fault power module is smaller than the number threshold, indicating that the energy router can be continuously started, closing the bypass switch of the second fault power module, and isolating the second fault power module, wherein, by combining the above contents, the bypass switch of the first fault power module is closed, that is, the first fault power module is isolated.
And if the sum of the number of the first fault power module and the number of the second fault power module is larger than or equal to the number threshold, indicating that the energy router cannot be started continuously, and stopping the process of starting the energy router.
Step S509: and closing the bypass switch of the second fault power module and isolating the second fault power module.
Step S510: the start of the energy router is suspended.
Preferably, after step S509 is executed, the specific execution process of step S306 in fig. 3 in the embodiment of the present invention is as follows: and when the first voltage, the second voltage and the third voltage corresponding to the second normal power module accord with preset voltage stability conditions, indicating that the low-voltage side is charged, and closing the second contactor to enable the second starting resistor to be in short circuit. And adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing the high-voltage side isolating switch. Specifically, how to adjust the first voltage, the second voltage, and the third voltage of the second normal power module to reach the preset rated voltage is described in step S306 of fig. 3 in the above embodiment of the present invention.
In the embodiment of the invention, if the starting instruction is a low-voltage side starting instruction, the low-voltage side of the energy router starts to be started by controlling the states of all components of the energy router, and the power module is judged and isolated for multiple times in the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
Corresponding to the control method of the energy router provided by the above embodiment of the present invention, referring to fig. 6, an embodiment of the present invention further provides a structural block diagram of a central controller, where the central controller is used to control the energy router, and a specific architecture of the energy router refers to what is shown in fig. 1, where the central controller includes: a first acquisition unit 601, a second acquisition unit 602, a first processing unit 603, a second processing unit 604, a third processing unit 605, and a fourth processing unit 606;
the first obtaining unit 601 is configured to obtain switch states of all switches of the energy router and communication states of all power modules.
A second obtaining unit 602, configured to obtain a start instruction for starting the energy router when the switch state indicates that all switches of the energy router are in a disconnection state and the communication state indicates that all power modules are in a communication interruption state, where the start instruction is a high-voltage side start instruction or a low-voltage side start instruction, and if the start instruction is the high-voltage side start instruction, execute the first processing unit 603, and if the start instruction is the low-voltage side start instruction, execute the third processing unit 605.
The first processing unit 603 is configured to control the high-voltage side isolation switch, the second contactor, and the bypass switch, charge the first high-voltage side capacitor, the second high-voltage side capacitor, and the low-voltage side capacitor, isolate the fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor, and the third voltage of the low-voltage side capacitor, and execute the second processing unit 604.
The second processing unit 604 is configured to close the first contactor, adjust the first voltage, the second voltage, and the third voltage corresponding to the normal power module among all the power modules to reach a preset rated voltage, and close the low-voltage side circuit breaker when the first voltage, the second voltage, and the third voltage corresponding to the normal power module meet a preset voltage stabilization condition.
The third processing unit 605 is configured to control the low-voltage side circuit breaker, the first contactor, and the bypass switch, charge the low-voltage side capacitor, the first high-voltage side capacitor, and the second high-voltage side capacitor, isolate the fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor, and the third voltage of the low-voltage side capacitor, and execute the fourth processing unit 606.
And a fourth processing unit 606, configured to close the second contactor, adjust the first voltage, the second voltage, and the third voltage corresponding to the normal power module of all the power modules to reach a preset rated voltage, and close the high-side disconnecting switch when the first voltage, the second voltage, and the third voltage corresponding to the normal power module meet a preset voltage stabilization condition.
In the embodiment of the invention, when the energy router is started, the high-voltage side or the low-voltage side of the energy router can be selected to carry out starting operation by controlling the states of all components of the energy router, and the power module with a fault is determined and isolated in the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
Preferably, in conjunction with what is shown in fig. 6, the first processing unit 603 includes: the system comprises a first processing subunit, a first determining subunit, a first isolating subunit, a second processing subunit, a second determining subunit and a second isolating subunit, wherein the execution principle of each subunit is as follows:
and the first processing subunit is used for closing the high-voltage side isolating switch and the second contactor if the starting instruction is a high-voltage side starting instruction, charging the first high-voltage side capacitor and the second high-voltage side capacitor of each power module, and acquiring the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor in real time.
And the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages.
Preferably, the first determining subunit is further configured to: and if the number of the first failure power modules is larger than or equal to the number threshold, stopping starting the energy router.
And the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than the number threshold.
And the second processing subunit is used for charging the low-voltage side capacitor of the first normal power module by using the first normal power module and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time.
And the second determining subunit is used for determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module.
Preferably, the second determining subunit is further configured to: and if the sum of the number of the first fault power module and the second fault power module is larger than or equal to the number threshold, stopping starting the energy router.
And the second isolation subunit is used for closing the bypass switch of the second fault power module and isolating the second fault power module if the sum of the number of the first fault power module and the number of the second fault power module is less than the number threshold.
Correspondingly, the second processing unit 603 is specifically configured to: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet the preset voltage stability condition, the first contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the second normal power module are adjusted to reach the preset rated voltage, and the low-voltage side circuit breaker is closed.
In the embodiment of the invention, if the starting instruction is a high-voltage side starting instruction, the high-voltage side of the energy router starts to start by controlling the states of all components of the energy router, and the power module is judged and isolated for multiple times during the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
Preferably, in connection with what is shown in fig. 6, the third processing unit 605 includes: the system comprises a first processing subunit, a first determining subunit, a first isolating subunit, a second processing subunit, a second determining subunit and a second isolating subunit, wherein the execution principle of each subunit is as follows:
and the first processing subunit is used for closing the low-voltage side circuit breaker and the first contactor if the starting instruction is a low-voltage side starting instruction, charging the low-voltage side capacitor of each power module and acquiring the third voltage of the low-voltage side capacitor in real time.
And the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to the third voltage.
Preferably, the first determining subunit is further configured to: and if the number of the first failure power modules is larger than or equal to the number threshold, stopping starting the energy router.
And the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than the number threshold.
And the second processing subunit is used for charging the first high-voltage side capacitor and the second high-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring the first voltage of the first high-voltage side capacitor and the second voltage of the second high-voltage side capacitor of the first normal power module in real time.
And the second determining subunit is used for determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module.
Preferably, the second determining subunit is further configured to: and if the sum of the number of the first fault power module and the second fault power module is larger than or equal to the number threshold, stopping starting the energy router.
And the second isolation subunit is used for closing the bypass switch of the second fault power module and isolating the second fault power module if the sum of the number of the first fault power module and the number of the second fault power module is less than the number threshold.
Correspondingly, the fourth processing unit 606 is specifically configured to: and when the first voltage, the second voltage and the third voltage corresponding to the second normal power module accord with preset voltage stability conditions, closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach preset rated voltages, and closing the high-voltage side isolating switch.
In the embodiment of the invention, if the starting instruction is a low-voltage side starting instruction, the low-voltage side of the energy router starts to be started by controlling the states of all components of the energy router, and the power module is judged and isolated for multiple times in the starting process, so that the energy router can be continuously and normally started, and the starting stability and the starting reliability of the energy router are improved.
Preferably, in conjunction with the content shown in fig. 6, the central controller further includes:
and the switching unit is used for controlling the energy router to be switched from the starting mode to the running mode if the abnormal state of the energy router is determined according to the switch state and the communication state.
In summary, embodiments of the present invention provide a control method for an energy router, a central controller, and an energy router, where when the energy router is started, a high-voltage side or a low-voltage side of the energy router may be selected to perform a starting operation by controlling states of components of the energy router, and a failed power module is determined and isolated in a starting process, so as to ensure that the energy router can continue to be started normally, and improve starting stability and starting reliability of the energy router.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A control method of an energy router is characterized by being applicable to a central controller for controlling the energy router, wherein the energy router at least comprises a high-voltage side isolating switch, a high-voltage side starting circuit formed by connecting a first contactor and a first starting resistor in parallel, a low-voltage side starting circuit formed by connecting a second contactor and a second starting resistor in parallel, a low-voltage side circuit breaker and N power modules, N is a positive integer, the power modules at least comprise a bypass switch, a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, and the method comprises the following steps:
acquiring the switch states of all switches of the energy router and the communication states of all power modules;
when the switch state indicates that all switches of the energy router are in a breaking state and the communication state indicates that all power modules are in a communication interruption state, acquiring a starting instruction for starting the energy router, wherein the starting instruction is a high-voltage side starting instruction or a low-voltage side starting instruction;
if the starting instruction is a high-voltage side starting instruction, controlling a high-voltage side isolating switch, a second contactor and a bypass switch, charging a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, and isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor;
when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition, closing the first contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage, and closing the low-voltage side circuit breaker;
if the starting instruction is a low-voltage side starting instruction, controlling a low-voltage side circuit breaker, a first contactor and a bypass switch, charging a low-voltage side capacitor, a first high-voltage side capacitor and a second high-voltage side capacitor, and isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor;
and when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet preset voltage stability conditions, closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach preset rated voltages, and closing the high-voltage side isolating switch.
2. The method according to claim 1, wherein if the start command is a high-side start command, controlling a high-side isolation switch, a second contactor, and a bypass switch to charge a first high-side capacitor, a second high-side capacitor, and a low-side capacitor, and isolating all faulty power modules in the power modules according to a first voltage of the first high-side capacitor, a second voltage of the second high-side capacitor, and a third voltage of the low-side capacitor, comprises:
if the starting instruction is a high-voltage side starting instruction, closing a high-voltage side isolating switch and a second contactor, charging a first high-voltage side capacitor and a second high-voltage side capacitor of each power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor in real time;
determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages;
if the number of the first fault power modules is smaller than a number threshold, closing a bypass switch of the first fault power modules and isolating the first fault power modules;
charging a low-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time;
determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module;
if the sum of the number of the first fault power module and the second fault power module is smaller than the number threshold, closing a bypass switch of the second fault power module and isolating the second fault power module;
correspondingly, when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, the first contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the normal power module are adjusted to reach the preset rated voltage, and the low-voltage side circuit breaker is closed, including:
when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet a preset voltage stabilization condition, closing a first contactor;
and adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing a low-voltage side circuit breaker.
3. The method of claim 1, wherein if the start command is a low-side start command, controlling a low-side circuit breaker, a first contactor, and a bypass switch to charge a low-side capacitor, a first high-side capacitor, and a second high-side capacitor, and isolating all faulty power modules in the power modules according to a first voltage of the first high-side capacitor, a second voltage of the second high-side capacitor, and a third voltage of the low-side capacitor, comprises:
if the starting instruction is a low-voltage side starting instruction, closing a low-voltage side circuit breaker and a first contactor, charging a low-voltage side capacitor of each power module, and collecting a third voltage of the low-voltage side capacitor in real time;
determining a first fault power module and a first normal power module in all the power modules according to the third voltage;
if the number of the first fault power modules is smaller than a number threshold, closing a bypass switch of the first fault power modules and isolating the first fault power modules;
charging a first high-voltage side capacitor and a second high-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor of the first normal power module in real time;
determining a second fault power module and a second normal power module in the first normal power module according to the first voltage, the second voltage and the third voltage corresponding to the first normal power module;
if the sum of the number of the first fault power module and the second fault power module is smaller than the number threshold, closing a bypass switch of the second fault power module and isolating the second fault power module;
correspondingly, when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet the preset voltage stability condition, the second contactor is closed, the first voltage, the second voltage and the third voltage corresponding to the normal power module are adjusted to reach the preset rated voltage, and the high-voltage side isolating switch is closed, including:
when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet a preset voltage stabilization condition, closing a second contactor;
and adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach a preset rated voltage, and closing a high-voltage side isolating switch.
4. The method of claim 2 or 3, further comprising:
and if the number of the first fault power modules is larger than or equal to the number threshold, or if the sum of the number of the first fault power modules and the number of the second fault power modules is larger than or equal to the number threshold, stopping starting the energy router.
5. The method of claim 1, wherein after closing the low side circuit breaker or after closing the high side disconnector, further comprising:
and if the abnormal state of the energy router is determined according to the switch state and the communication state, controlling the energy router to be switched from a starting mode to an operating mode.
6. The utility model provides a central controller, its characterized in that central controller is used for controlling energy router, energy router includes high pressure side isolator at least, by the parallelly connected high pressure side starting circuit who constitutes of first contactor and first starting resistance, by the parallelly connected low pressure side starting circuit who constitutes of second contactor and second starting resistance, low pressure side circuit breaker and N power module, N is positive integer, power module includes bypass switch, first high pressure side electric capacity, second high pressure side electric capacity and low pressure side electric capacity at least, central controller includes:
the first acquisition unit is used for acquiring the switch states of all switches of the energy router and the communication states of all power modules;
a second obtaining unit, configured to obtain a start instruction for starting the energy router when the switch state indicates that all switches of the energy router are in a disconnection state and the communication state indicates that all power modules are in a communication interruption state, where the start instruction is a high-voltage side start instruction or a low-voltage side start instruction, execute the first processing unit if the start instruction is the high-voltage side start instruction, and execute the third processing unit if the start instruction is the low-voltage side start instruction;
the first processing unit is used for controlling a high-voltage side isolating switch, a second contactor and a bypass switch, charging a first high-voltage side capacitor, a second high-voltage side capacitor and a low-voltage side capacitor, isolating fault power modules in all the power modules according to a first voltage of the first high-voltage side capacitor, a second voltage of the second high-voltage side capacitor and a third voltage of the low-voltage side capacitor, and executing the second processing unit;
the second processing unit is used for closing the first contactor when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage, and closing the low-voltage side circuit breaker;
the third processing unit is used for controlling the low-voltage side circuit breaker, the first contactor and the bypass switch, charging a low-voltage side capacitor, a first high-voltage side capacitor and a second high-voltage side capacitor, isolating fault power modules in all the power modules according to the first voltage of the first high-voltage side capacitor, the second voltage of the second high-voltage side capacitor and the third voltage of the low-voltage side capacitor, and executing a fourth processing unit;
and the fourth processing unit is used for closing the second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the normal power module to reach a preset rated voltage and closing the high-voltage side isolating switch when the first voltage, the second voltage and the third voltage corresponding to the normal power module in all the power modules meet a preset voltage stability condition.
7. The central controller according to claim 6, wherein the first processing unit comprises:
the first processing subunit is used for closing a high-voltage side isolating switch and a second contactor if the starting instruction is a high-voltage side starting instruction, charging a first high-voltage side capacitor and a second high-voltage side capacitor of each power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor in real time;
the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to all the first voltages and all the second voltages;
the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than a number threshold;
the second processing subunit is used for charging the low-voltage side capacitor of the first normal power module by using the first normal power module and acquiring a third voltage of the low-voltage side capacitor of the first normal power module in real time;
a second determining subunit, configured to determine, according to the first voltage, the second voltage, and the third voltage corresponding to the first normal power module, a second faulty power module and a second normal power module in the first normal power module;
the second isolation subunit is configured to close the bypass switch of the second faulty power module and isolate the second faulty power module if the sum of the numbers of the first faulty power module and the second faulty power module is smaller than the number threshold;
correspondingly, the second processing unit is specifically configured to: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet preset voltage stability conditions, closing the first contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach preset rated voltages, and closing the low-voltage side circuit breaker.
8. The central controller according to claim 6, wherein the third processing unit comprises:
the first processing subunit is used for closing a low-voltage side circuit breaker and a first contactor if the starting instruction is a low-voltage side starting instruction, charging a low-voltage side capacitor of each power module, and acquiring a third voltage of the low-voltage side capacitor in real time;
the first determining subunit is used for determining a first fault power module and a first normal power module in all the power modules according to the third voltage;
the first isolation subunit is used for closing the bypass switch of the first fault power module and isolating the first fault power module if the number of the first fault power modules is smaller than a number threshold;
the second processing subunit is used for charging a first high-voltage side capacitor and a second high-voltage side capacitor of the first normal power module by using the first normal power module, and acquiring a first voltage of the first high-voltage side capacitor and a second voltage of the second high-voltage side capacitor of the first normal power module in real time;
the second determining subunit is configured to determine, according to the first voltage, the second voltage, and the third voltage corresponding to the first normal power module, a second faulty power module and a second normal power module in the first normal power module;
the second isolation subunit is configured to close the bypass switch of the second faulty power module and isolate the second faulty power module if the sum of the numbers of the first faulty power module and the second faulty power module is smaller than the number threshold;
correspondingly, the fourth processing unit is specifically configured to: when the first voltage, the second voltage and the third voltage corresponding to the second normal power module meet preset voltage stability conditions, closing a second contactor, adjusting the first voltage, the second voltage and the third voltage corresponding to the second normal power module to reach preset rated voltages, and closing a high-voltage side isolating switch.
9. The central processing unit of claim 6, wherein the central controller further comprises:
and the switching unit is used for controlling the energy router to be switched from a starting mode to an operating mode if the abnormal state of the energy router is determined according to the switch state and the communication state.
10. An energy router, characterized in that it comprises at least: the high-voltage side circuit breaker comprises a high-voltage side isolating switch, a high-voltage side starting circuit, a low-voltage side circuit breaker and N power modules, wherein the high-voltage side starting circuit is formed by connecting a first contactor and a first starting resistor in parallel;
a first direct-current bus positive port and a first direct-current bus negative port are respectively connected with a first input end and a second input end of the high-voltage side isolating switch, a first output end of the high-voltage side isolating switch is connected with the high-voltage side of a first power module through the high-voltage side starting circuit, and a second output end of the high-voltage side isolating switch is connected with the high-voltage side of an Nth power module;
the high-voltage sides among the N power modules are connected in series, and the low-voltage sides among the N power modules are connected in parallel;
the positive port of the second direct current bus and the negative port of the second direct current bus are respectively connected with the first input end and the second input end of the low-voltage side circuit breaker, the first output end of the low-voltage side circuit breaker is connected with the first end of the low-voltage side of the power module through the low-voltage side starting circuit, and the second output end of the low-voltage side circuit breaker is connected with the second end of the low-voltage side of the power module.
CN202011062083.9A 2020-09-30 2020-09-30 Control method of energy router, central controller and energy router Active CN114336953B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011062083.9A CN114336953B (en) 2020-09-30 2020-09-30 Control method of energy router, central controller and energy router

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011062083.9A CN114336953B (en) 2020-09-30 2020-09-30 Control method of energy router, central controller and energy router

Publications (2)

Publication Number Publication Date
CN114336953A true CN114336953A (en) 2022-04-12
CN114336953B CN114336953B (en) 2023-10-03

Family

ID=81011157

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011062083.9A Active CN114336953B (en) 2020-09-30 2020-09-30 Control method of energy router, central controller and energy router

Country Status (1)

Country Link
CN (1) CN114336953B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115864659A (en) * 2023-02-27 2023-03-28 西安西电高压开关有限责任公司 Energy router series power module fault redundancy control method and system

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633623A (en) * 2013-12-08 2014-03-12 中国科学院电工研究所 High-voltage direct-current (DC) transformer and control method thereof
CN104052292A (en) * 2014-06-25 2014-09-17 南京南瑞继保电气有限公司 Modularized high-voltage direct current conversion device and control method of modularized high-voltage direct current conversion device
CN110336470A (en) * 2019-07-09 2019-10-15 许继电气股份有限公司 Electric power electric transformer system, transformer and its fault traversing control method
US20200177091A1 (en) * 2018-11-30 2020-06-04 Sungrow (Shanghai) Co., Ltd. Medium-high voltage energy conversion system, and control method and controller therefor
CN111509985A (en) * 2020-04-27 2020-08-07 许继电气股份有限公司 Self-blocking true bipolar power electronic transformer system and control method
CN111596130A (en) * 2020-03-14 2020-08-28 青岛鼎信通讯股份有限公司 Method for improving efficiency of energy router by utilizing resonant frequency detection technology

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103633623A (en) * 2013-12-08 2014-03-12 中国科学院电工研究所 High-voltage direct-current (DC) transformer and control method thereof
CN104052292A (en) * 2014-06-25 2014-09-17 南京南瑞继保电气有限公司 Modularized high-voltage direct current conversion device and control method of modularized high-voltage direct current conversion device
US20200177091A1 (en) * 2018-11-30 2020-06-04 Sungrow (Shanghai) Co., Ltd. Medium-high voltage energy conversion system, and control method and controller therefor
CN110336470A (en) * 2019-07-09 2019-10-15 许继电气股份有限公司 Electric power electric transformer system, transformer and its fault traversing control method
CN111596130A (en) * 2020-03-14 2020-08-28 青岛鼎信通讯股份有限公司 Method for improving efficiency of energy router by utilizing resonant frequency detection technology
CN111509985A (en) * 2020-04-27 2020-08-07 许继电气股份有限公司 Self-blocking true bipolar power electronic transformer system and control method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
彭东东: "能量路由系统参数优化研究", 《中国优秀硕士论文全文数据库》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115864659A (en) * 2023-02-27 2023-03-28 西安西电高压开关有限责任公司 Energy router series power module fault redundancy control method and system

Also Published As

Publication number Publication date
CN114336953B (en) 2023-10-03

Similar Documents

Publication Publication Date Title
CN110716150B (en) Energy storage system and insulation detection method thereof
CN1848582B (en) Electrified wire netting supervisory relay for automatic phase correcting, possessing switch output
CN104170236B (en) Converter unit and association transducer arm and method
CN112467839B (en) Battery cluster management device and battery energy storage system
CN113078714B (en) Energy storage system and control method thereof
KR20210008334A (en) High voltage battery cluster and overcurrent protection circuit and switch box of high voltage battery cluster
CN111277132A (en) Power factor correction circuit and assembly and online uninterruptible power supply including same
CN103746553B (en) High pressure DC-DC converter and control method
CN211089218U (en) High-capacity high-reliability rapid power supply switching device
CN114336953B (en) Control method of energy router, central controller and energy router
CN103368156A (en) Modularized saturation iron core superconductive current limiter and control method thereof
CN111342496A (en) Micro-grid switching device and switching control method
CN116599350A (en) High-voltage direct-current transformer
CN112701913A (en) Boost power conversion circuit and control method and application device thereof
CN113572189B (en) Bipolar flexible direct current system for offshore wind power and transformer fault switching method thereof
CN106848999B (en) Direct current breaker
JP2017011985A (en) System interconnection system using inverter and system interconnection method of three-phase power
CN114726228A (en) Solid-state transformer and power supply equipment
CN213585610U (en) High-power synchronous motor starting system
CN113839406A (en) Self-energy supply control method of novel high-voltage direct-current circuit breaker
CN111740392A (en) Fault protection method, intelligent combiner box and photovoltaic inversion system
CN110568276A (en) Phase-missing judgment system and method for distribution transformer
CN116488322B (en) Parallel low-voltage high-current output direct-current power supply device and control method
CN219843447U (en) Battery charge-discharge control device and uninterruptible power supply system
CN112217411B (en) Reactive power converter and soft start and overhaul method thereof

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant