CN115912467A - Coordination control system and method for distributed power generation microgrid technology - Google Patents
Coordination control system and method for distributed power generation microgrid technology Download PDFInfo
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Abstract
The invention discloses a coordination control system of a distributed power generation microgrid technology, which comprises a distributed power generation DG system and a microgrid coordination control system, wherein the distributed power generation DG system comprises an energy storage module, an energy conversion module and a direct current bus connection module; compared with the method of the coordination control system of the traditional distributed power generation micro-grid technology, the method adopts an intelligent hierarchical control method, and realizes the function of hierarchical control of the micro-grid coordination control system on charge monitoring and power distribution network measurement control.
Description
Technical Field
The invention relates to the technical field of micro-grid control distributed power generation, in particular to a coordination control system and method of a distributed power generation micro-grid technology.
Background
With the rapid development of the existing network technology, the comprehensive utilization and distribution control of the distributed energy of the microgrid are constructed by combining the distributed power generation technology.
In the prior art, a coordinated control system of a distributed power generation microgrid technology utilizes a microgrid to control the operation state of a distributed energy management platform, predicts by processing data of the distributed power generation system in a centralized manner, optimizes an energy storage module for distributed power generation by adopting a master-slave control method, and controls parameter operation indexes in the microgrid.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a coordination control system and method for a distributed power generation microgrid technology, which overcome the problem of difficulty in extracting source codes in a source code instrumentation mode, facilitate the output of a subsequent function graph and a hybrid dynamic modeling method, and ensure the accuracy of modeling analysis data in an analysis method process based on multi-node automatic modeling, so as to solve the problems presented in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the coordination control system of the distributed power generation microgrid technology comprises a distributed power generation DG system and a microgrid coordination control system, wherein the distributed power generation DG system comprises an energy storage module, an energy conversion module and a direct-current bus connection module, the microgrid coordination control system comprises a signal receiving and transmitting communication module, a microgrid operation coordination central control module, a monitoring charge module, a coordination control module and a power distribution network measurement control module, network interaction is established between the distributed power generation DG system and the microgrid coordination control system, and the coordination control system of the distributed power generation microgrid technology is realized through a distributed power supply connection interface inverter.
Furthermore, the energy storage module stores energy generated by the solar power generation unit, the wind power generation unit and the natural gas unit, the energy storage module is composed of a plurality of capacitors and natural gas pipe energy storage units, optical energy absorbed by the solar electrode plate, mechanical energy generated by wind power rotation and natural gas are stored in the energy storage units respectively, the energy conversion module is used for converting energy in other forms into electric energy and supplying the electric energy to the circuit so as to maintain the stable flow of current in the circuit, and the optical energy and the mechanical energy in the energy storage module are converted into electric energy and the natural gas is converted into heat energy.
Further, the DC bus connection module includes a DC/DC converter, a DC/AC converter, a section switch and an intelligent circuit breaker, the DC bus connection module is a connection line capable of converting a direct current and an alternating current in an inverter and a frequency converter, the DC/DC converter converts the electric energy converted in the solar power generation unit from the direct current to the direct current in the transportation process, the DC/AC converter converts the electric energy converted in the wind power generation unit from the direct current to the alternating current in the transportation process, the section switch is formed by combining a timing decoder, an HEF4017BP, a relay and a triode, and the intelligent circuit breaker is a switching device capable of closing, bearing and opening the current under the normal loop condition and closing, bearing and opening the current under the abnormal loop condition within a specified time.
Furthermore, the distributed power supply is small and modular, is distributed at a user end, has an access range from zero to thirty-five million voltage power grids, and is mainly consumed as a main independent power supply on site, the interface inverter consists of an inverter bridge, control logic and a filter circuit and is a converter for converting direct current electric energy into fixed-frequency fixed-voltage and frequency-modulation and voltage-modulation alternating current, the interface inverter and the DC/AC exchanger are used for voltage inversion processes and both adopt PWM (pulse-width modulation) regulation and control technology, and the power grid system is a centralized power grid which is accessed into the distributed power supply in a distributed power generation system and supports network monitoring and control.
The microgrid operation coordination central control module is used for acquiring circuit parameter data and circuit charge state data by using a processor, performing fast operation processing by analyzing the data to implement control, measuring the period of a power data signal in the distributed power generation system in real time by using a synchronous sampling method in an automatic measurement and control technology of a power system, controlling accumulated deviation in a timer minimum timing unit, estimating the circuit charge state by using a Kalman filtering algorithm, performing comparative analysis on the acquired current and voltage data values and current and voltage values set in a coordination control system to establish a model operation algorithm, and performing real-time logic control on a microgrid operation system by using a logic principle and a logic method on the basis of random control and empirical control in real time.
Further, the monitoring charge module comprises a P-Q control unit, a voltage regulation unit, a frequency regulation control unit and a composite tracking unit, the monitoring charge module is used for monitoring the charge condition of a circuit, the P-Q control unit is a module for controlling the active power and the reactive power output by the distributed power generation system to be equal to the reference power by the microgrid coordinated control system, the voltage regulation unit feeds back the detected voltage abnormality to the central control module, the voltage regulation control unit regulates and controls the circuit voltage by programming a voltage regulation code by a computer, the frequency regulation control unit is a unit for maintaining the balance of the supply and demand of the active power, the frequency regulation control unit regulates the power generation power and performs load management by adopting the regulation, and the load tracking unit is a unit for establishing model analysis on the coupling characteristic between the output change and the load change of the distributed power supply.
Furthermore, the coordination control module comprises a distributed energy controller unit, a protection control device unit and a unit for supplying power and heat energy to users, the coordination control module issues a control instruction to the system according to the operation result of the micro-grid operation coordination central control module, then the coordination control module executes the control instruction in a layered mode, the distributed energy controller unit is used for controlling units of optical energy, mechanical energy, electric energy and natural gas and carrying out centralized control, conversion and transportation of distributed energy, the protection control device unit is used for protecting and controlling the power grid in a digitalized and automatic mode through a network system, and the unit for supplying power and heat energy to users is used for controlling the energy to be converted into electric energy and heat energy to be used for loads of nearby users and controlling the use of the electric energy and human heat energy.
Furthermore, the power distribution network measurement control module comprises a power distribution network measurement unit and a power distribution network scheduling unit, the power distribution network measurement control module measures data of frequency, power, voltage, current and phase difference in a circuit in a state that a stabilized voltage power supply is transmitted in a power grid, then the data are processed through the signal transmission central control module according to the measured data, the power distribution network measurement unit measures data of current, voltage and power on the power grid and transmits the data to the processor through signals, and the power distribution network scheduling unit processes the data of the power distribution network measurement unit through the processor and utilizes a computer to edit a code instruction DG to perform coordination control.
Further, the method for the coordinated control system of the distributed power generation microgrid technology specifically comprises the following steps:
s1, firstly, a distributed power source is utilized to connect distributed power generation into a power grid system by adopting an interface inverter;
s2, forming a microgrid control system by the distributed power sources and the corresponding loads in the power grid system according to a topological structure;
s3, monitoring the charge state of the distributed power generation system in the microgrid in real time, establishing a small-signal dynamic model, analyzing influence parameters influencing the coordination control of the microgrid, and optimizing and adjusting the control parameters;
s4, in the coordination control of distributed power generation, the microgrid system carries out intelligent hierarchical control on a distributed power source, adopts a droop control method to change inverter control and distributes power to connected loads in a balanced manner;
and S5, finally, the coordination control system intelligently distributes the maximum power of the distributed generation to the load and intelligently adjusts the parameters of the power grid through the power grid communication technology to control the normal operation of the system.
The invention has the technical effects and advantages that:
compared with the method of the coordination control system of the traditional distributed power generation micro-grid technology, the method adopts an intelligent hierarchical control method, realizes the function of hierarchical control of the micro-grid coordination control system on charge monitoring and power distribution network measurement control, improves the control accuracy of the coordination control system of the distributed power generation micro-grid technology, and realizes the function of balanced distribution of maximum power to loads by carrying out droop control processing on the distributed power supply by the micro-grid coordination control system.
Drawings
Fig. 1 is a block diagram of a method of a coordinated control system of the distributed power generation microgrid technology of the present invention;
FIG. 2 is a diagram of a distributed power generation system of the present invention;
fig. 3 is a diagram of a microgrid coordinated control system according to the present invention;
fig. 4 is a block diagram of a microgrid operation coordination center control module according to the present invention.
Detailed Description
Examples of the present disclosure will be described in greater detail below with reference to the accompanying drawings, which show examples of the present disclosure, but it should be understood that the present disclosure may be embodied in various forms without being limited to the embodiments set forth herein, but on the contrary, these are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
The following description of at least one example is merely illustrative in nature and is in no way intended to limit the application, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, it need not be discussed further in subsequent figures,
the application applies to computer systems/servers that are operable with numerous other general purpose or special purpose computing system environments or configurations, examples of well known computing systems, environments, and/or configurations that are suitable for use with computer systems/servers include, but are not limited to, personal computer systems, server computer systems, thin clients, thick clients, hand-held or laptop devices, microprocessor-based systems, set top boxes, programmable consumer electronics, networked personal computers, minicomputers, mainframe computers, distributed cloud computing environments that include any of the above, and the like.
The computer systems/servers may be described in the general context of computer system-executable instructions, such as program modules, being executed by computer systems, which may include routines, programs, objects, components, logic, data structures, etc. that perform particular tasks or implement particular abstract data types, and generally may be implemented in distributed cloud computing environments where tasks are performed by remote processing devices that are linked through a communications network and where program modules may be located in local or remote computing system storage media including storage devices.
Example 1
The invention provides a coordination control system of a distributed power generation microgrid technology, which comprises a distributed power generation DG system and a microgrid coordination control system, wherein the distributed power generation DG system comprises an energy storage module, an energy conversion module and a direct current bus connection module, the microgrid coordination control system comprises a signal receiving and transmitting communication module, a microgrid operation coordination central control module, a monitoring charge module, a coordination control module and a power distribution network measurement control module, network interaction is established between the distributed power generation DG system and the microgrid coordination control system, and the coordination control system of the distributed power generation microgrid technology is realized through a distributed power supply connection interface inverter.
Compared with the prior art, the method has the advantages that the microgrid coordinated control system adopts an intelligent hierarchical control method, a traditional master-slave control method is not used, the hierarchical control function of the microgrid coordinated control system on charge monitoring and power distribution network measurement control is achieved, and the control accuracy of the coordinated control system of the distributed power generation microgrid technology is improved; in addition, the micro-grid coordination control system is used for carrying out droop control processing on the distributed power supply, and the function of balanced distribution of maximum power to loads is achieved.
In this embodiment, it is specifically described that the energy storage module stores energy generated by a solar power generation unit, a wind power generation unit, and a natural gas unit, the energy storage module is composed of a plurality of capacitors and a natural gas pipe energy storage unit, and respectively stores light energy absorbed by a solar electrode plate, mechanical energy rotated by wind power, and natural gas in the energy storage unit, and the energy conversion module is configured to convert energy in other forms into electric energy to be provided to a circuit, so as to maintain a steady flow of current in the circuit, and convert light energy and mechanical energy in the energy storage module into electric energy and convert natural gas into heat energy;
the solar power generation unit is characterized in that a photovoltaic array is formed by solar cells, a photovoltaic effect is generated through semiconductor materials in the photovoltaic cells, light energy is absorbed and converted into electric energy, the wind power generation unit is a wind power generation station, renewable energy wind energy is used for blowing a windmill to rotate to generate mechanical energy, then the mechanical energy is converted into the electric energy, and the natural gas unit is used for arranging non-renewable energy from a pipeline and controlling the non-renewable energy through a network.
In this embodiment, it is specifically described that the DC bus connection module includes a DC/DC converter, a DC/AC converter, a section switch and an intelligent circuit breaker, the DC bus connection module refers to a connection line capable of converting a direct current and an alternating current in an inverter and a frequency converter, the DC/DC converter converts an electric energy converted in a solar power generation unit from a direct current to a direct current in a transportation process, the DC/AC converter converts an electric energy converted in a wind power generation unit from a direct current to an alternating current in a transportation process, the section switch is formed by combining a time sequence decoder, an HEF4017BP, a relay and a triode, and the intelligent circuit breaker refers to a switching device capable of closing, carrying and opening a current under a normal loop condition and closing, carrying and opening a current under an abnormal loop condition within a specified time;
the working principle of the section switch is rectification filtering, which consists of a rectification circuit and a filtering circuit and aims to reduce the voltage of an alternating current power supply, rectify and filter the alternating current power supply into proper direct current voltage which is used as the working power supply of the inverter; the intelligent circuit breaker is composed of an electronic mutual inductor and an electronic release, current values of all phases are edited and set in a system, when the electronic mutual inductor collects the magnitude values of all phases, the magnitude values are compared with set values, if the magnitude values are abnormal, a system processor sends an abnormal current signal, the electronic release drives the system to operate and cut off a load circuit, the intelligent circuit breaker is used for distributing electric energy, an asynchronous motor is started infrequently, a power supply circuit and the motor are protected, and the circuit can be automatically cut off when serious overload, short circuit and undervoltage faults occur.
In this embodiment, it is specifically described that the distributed power source is a small-sized modular distributed power source, which is distributed at a user end, and has an access range of zero to thirty-five million voltage grids, and takes local consumption as a main independent power source, the interface inverter is a converter composed of an inverter bridge, control logic and a filter circuit, and is used for converting direct current electric energy into constant frequency, constant voltage and frequency and voltage regulation alternating current, the interface inverter and the DC/AC converter are voltage inversion processes, and both adopt a PWM control technique, and the power grid system is a centralized power grid that is connected to the distributed power source in a distributed power generation system and supports network monitoring control;
the PWM regulation and control technology adopts a PWM controller to control internal voltage to realize overvoltage protection, undervoltage protection and short-circuit protection, the interface inverter comprises three signals at an interface input part, direct current is input to a voltage input end VIN before voltage stabilization, work enabling voltage ENB and a panel current control signal DIM, the voltage input end before voltage stabilization is provided by an adapter, ENB voltage is provided by a microprocessor on a mainboard, the value of the ENB voltage is 0V or 3V, when ENB =0, the inverter does not work, and when ENB =3V, the inverter is in a normal working state, the DIM voltage is provided by the mainboard, the variation range of the DIM voltage is between 0V and 5V, different DIM values are fed back to the feedback end of the PWM controller, the current provided by the inverter to a load is different, and the smaller DIM value is, the larger current is output by the inverter.
In this embodiment, it is specifically described that the microgrid operation coordination central control module includes data acquisition, data analysis, real-time logic control, and operation grid-connected and island algorithms, the microgrid operation coordination central control module acquires circuit parameter data and circuit charge state data by using a processor, and performs fast operation processing and control by analyzing data, the data acquisition is to perform real-time measurement on a power data signal period in a distributed power generation system by using a synchronous sampling method in an automatic measurement and control technology of a power system, accumulated deviation is controlled in a minimum timing unit of a timer, and then a kalman filter algorithm is used to estimate a circuit charge state, the data analysis is to perform comparative analysis on acquired current and voltage data values and current and voltage values set in a microgrid coordinated control system, and to establish a model operation algorithm, the real-time logic control is to perform a logic principle and a logic method on the basis of random control and empirical control in a microgrid operation system, and the operation grid-connected and island algorithms are to perform system grid-connected and island mode control on a distributed power generation system under monitoring control;
the real-time logic control can utilize a system to set a logic operation instruction for replacing a relay to control series-parallel combination logic and sequence logic, a grid-connected operation algorithm can continuously pass through a frequency deviation and reactive power disturbance active island protection mode and detect whether the voltage frequency of a power grid and the voltage amplitude of the power grid exceed specified values, then a passive island-proof protection mode is waited to judge that the self is in an island state, and the micro grid is coordinately controlled to operate in an anti-island mode by adopting the island algorithm due to the fact that distributed energy sources are connected to the power grid at multiple points.
In this embodiment, it is specifically described that the monitoring charge module includes a P-Q control unit, a voltage regulation unit, a frequency regulation control unit, and a composite tracking unit, the monitoring charge module is used for monitoring a charge condition of a circuit, the P-Q control unit is a module in which a microgrid coordinated control system controls active power and reactive power output by a distributed power generation system to be equal to a reference power, the voltage regulation unit feeds back detected voltage abnormality to a central control module, and regulates and controls circuit voltage by using a computer programmed voltage regulation code, the frequency regulation control unit is a unit that maintains active power supply and demand balance, and performs power generation power regulation and load management by using the unit that regulates power generation power and performs load management, and the load tracking unit is a unit that establishes model analysis for coupling characteristics between output variation and load variation of a distributed power supply, and can improve safety and economy of power grid operation.
In this embodiment, it is specifically described that the coordination control module includes a distributed energy controller unit, a protection control device unit, and a unit for supplying power and heat energy to users, the coordination control module issues a control instruction to the system according to an operation result of the micro-grid operation coordination center control module, and then the coordination control module executes the control instruction in a layered manner, the distributed energy controller unit is used for controlling units of optical energy, mechanical energy, electric energy, and natural gas to control, convert, and transport the distributed energy in a centralized manner, the protection control device unit is a power grid protected and controlled in an automated manner by using network system digitization, and the unit for supplying power and heat energy to users is used for controlling the use of electric energy and human heat energy by converting the control energy into electric energy and heat energy for loads of nearby users.
In this embodiment, it is specifically stated that the power distribution network measurement control module includes a power distribution network measurement unit and a power distribution network scheduling unit, where the power distribution network measurement control module measures data of frequency, power, voltage, current, and phase difference in a circuit in a state where a regulated power supply is transmitted in a power grid, and then processes the data by using a signal transmission central control module according to the measured data, the power distribution network measurement unit measures data of current, voltage, and power on and off the power grid, and transmits the data to a processor by using a signal, and the power distribution network scheduling unit processes the data of the power distribution network measurement unit by using the processor, and uses a computer to edit a code instruction DG to perform coordination control.
In this embodiment, what needs to be specifically described is a method for a coordinated control system of a distributed power generation microgrid technology, which specifically includes the following steps:
101. firstly, a distributed power source is utilized to connect distributed power generation into a power grid system by adopting an interface inverter;
in this embodiment, it should be specifically described that the distributed power generation is a distributed power generation manner, a distributed power generation system is that distributed power generation is controlled by connecting a power grid, the distributed power generation included in the distributed power generation system is mutually independent, and a function of balanced distribution of power and power is realized by controlling a user load end through a microgrid.
102. Forming a microgrid control system by a distributed power supply and corresponding loads in a power grid system according to a topological structure;
in this embodiment, it should be specifically noted that the topology refers to a physical layout that connects distributed power generation devices that transmit electric energy to each other by using a computer network, and can show a connection and control relationship between a network server and a network configuration of a distributed power generation station.
103. Then, monitoring the charge state of the distributed power generation system in real time in the microgrid, then establishing a small-signal dynamic model, analyzing influence parameters influencing the coordination control of the microgrid, and optimizing and adjusting control parameters;
in this embodiment, it is specifically described that the state of charge refers to a ratio of a number of charges existing in an energy storage medium capable of converting energy into electrical energy in an energy storage process to a number of charges contained in the energy storage medium corresponding to a rated energy storage capacity, the small-signal dynamic model refers to a property of a nonlinear element calculated by using a linear equation, specifically, a small-signal calculation of a diode in a solar power generation unit, and a relationship between a current flowing through the diode and a voltage is calculated by using a formula I D =I S e VD / nVT In which I D : current flowing through the diode, I S : saturation current, V D : voltage, V, flowing across the diode T : temperature volt equivalent, n: an ideality factor; the optimization adjustment control parameters are optimization algorithms, parameters are adjusted through a control variable method, the optimization algorithms respectively change the parameters by adopting a neural network layering technology, linear functions are introduced into parameter optimization calculation, operation results are compared, and the parameters of the power grid are controlled through automatically adjusting parameter variable values through a central control module.
104. In the coordinated control of distributed power generation, a microgrid system carries out intelligent hierarchical control on a distributed power supply, adopts a droop control method to change inverter control and distributes power to connected loads in a balanced manner;
in this embodiment, it is specifically described that the microgrid system is a microgrid system that an active power distribution network can promote access centralized control of distributed power sources and renewable energy sources, the droop control method is that active power and reactive power are measured to linearly adjust frequency and voltage output by an inverter, after droop control, a microgrid can achieve a power balancing effect and avoid voltage instability on a direct current bus connection module, the intelligent hierarchical control is that the microgrid coordinated control system achieves first-layer droop control, power distribution and load distribution among distribution systems, then second-layer indifference control is implemented, deviations generated by the droop control are eliminated, indifference frequency modulation and voltage regulation control is implemented, and finally, optimization control is further implemented to optimize distribution power and plan of the power grid and the microgrid coordinated control system.
105. And finally, the coordination control system intelligently distributes the maximum power of the distributed generation to the load and intelligently adjusts the parameters of the power grid through the power grid communication technology by using the micro-grid to control the normal operation of the system.
In this embodiment, what needs to be specifically described is that the microgrid coordinated control system controls the transmission power to the load in a balanced manner in the process of controlling the power grid, and the beneficial effect of the intelligent hierarchical control adopted by the microgrid coordinated control system is highlighted.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The coordinated control system of distributed power generation microgrid technique is characterized in that: the distributed generation DG system comprises an energy storage module, an energy conversion module and a direct-current bus connection module, the microgrid coordination control system comprises a signal receiving and transmitting communication module, a microgrid operation coordination central control module, a monitoring charge module, a coordination control module and a power distribution network measurement control module, network interaction is established between the distributed generation DG system and the microgrid coordination control system, and the coordination control system realizes a distributed generation microgrid technology through a distributed power supply connection interface inverter.
2. The coordinated control system of the distributed power generation microgrid technique of claim 1, characterized in that: the energy storage module is used for storing energy generated by the solar power generation unit, the wind power generation unit and the natural gas unit, the energy storage module is composed of a plurality of capacitors and natural gas pipe energy storage units, optical energy absorbed by the solar electrode plate, mechanical energy generated by wind power rotation and natural gas are stored in the energy storage units respectively, and the energy conversion module is used for converting energy in other forms into electric energy to be supplied to a circuit.
3. The coordinated control system of the distributed power generation microgrid technique of claim 1, characterized in that: the direct current bus connection module comprises a DC/DC exchanger, a DC/AC exchanger, a section switch and an intelligent circuit breaker, wherein the direct current bus connection module refers to a connection circuit capable of converting direct current and alternating current in an inverter and a frequency converter, the DC/DC exchanger converts the direct current into the direct current, the DC/AC exchanger converts the direct current into the alternating current, the section switch is formed by combining a time sequence decoder, an HEF4017BP, a relay and a triode, and the intelligent circuit breaker refers to a switch device capable of closing, bearing and opening current under the condition of a normal circuit and closing, bearing and opening and closing the current under the condition of an abnormal circuit within a specified time.
4. The coordinated control system of the distributed power generation microgrid technology of claim 1, characterized in that: the distributed power supply refers to an independent power supply which is distributed at a user end and is accessed into a power grid, the interface inverter consists of an inverter bridge, control logic and a filter circuit and is used for converting direct current electric energy into a converter for converting fixed frequency, fixed voltage, frequency modulation and voltage regulation alternating current, the interface inverter and the DC/AC exchanger are in a voltage inversion process and both adopt PWM (pulse width modulation) regulation and control technology, and the establishment of a power grid system is realized by accessing the distributed power supply into a distributed power generation system.
5. The coordinated control system of the distributed power generation microgrid technology of claim 1, characterized in that: the microgrid operation coordination center control module comprises data acquisition, data analysis, real-time logic control and operation grid-connected and island algorithms, the microgrid operation coordination center control module acquires circuit parameter data and circuit charge state data by using a processor, fast operation processing is carried out by analyzing data to implement control, the data acquisition adopts power data signal period real-time measurement, accumulated deviation is controlled in a timer minimum timing unit, a Kalman filtering algorithm is used for estimating the circuit charge state, the data analysis is to compare and analyze acquired current and voltage data values with current and voltage values set in a microgrid coordination control system, the real-time logic control refers to that in a microgrid operation system, a logic principle and a logic method are applied on the basis of random control and empirical control in real time, and the operation grid-connected and island algorithms refer to that the microgrid coordination control system executes a system grid-connected mode and an island mode to control a distributed power generation system under monitoring control.
6. The coordinated control system of the distributed power generation microgrid technology of claim 1, characterized in that: the monitoring charge module comprises a P-Q control unit, a voltage regulation unit, a frequency regulation control unit and a composite tracking unit, the monitoring charge module is used for monitoring the charge condition of a circuit, the P-Q control unit is a module for controlling the active power and the reactive power output by the distributed power generation system to be equal to the reference power by the microgrid coordinated control system, the voltage regulation unit feeds back the detected voltage abnormality to the central control module, and regulates and controls the circuit voltage by using a computer programming voltage regulation code, the frequency regulation control unit is a unit for maintaining the balance of the supply and demand of the active power and regulates the power generation power and carries out load management by adopting the regulation, and the load tracking unit is a model analysis established by the coupling characteristic between the output change and the load change of the distributed power supply.
7. The coordinated control system of the distributed power generation microgrid technique of claim 1, characterized in that: the coordination control module comprises a distributed energy controller unit, a protection control device unit and a unit for supplying power and heat energy to users, the coordination control module issues control instructions to the system according to the operation result of the micro-grid operation coordination center control module, then the coordination control module executes the control instructions in a layered mode, the distributed energy controller unit is used for controlling the units of light energy, mechanical energy, electric energy and natural gas to control, convert and transport the distributed energy in a centralized mode, the protection control device unit utilizes a network system to carry out digital and automatic protection control on the power grid, and the unit for supplying power and heat energy to users is used for controlling the power and heat energy to be converted into electric energy and heat energy to be used for loads close to the users to control the use of the electric energy and human heat energy.
8. The coordinated control system of the distributed power generation microgrid technique of claim 1, characterized in that: the power distribution network measurement control module comprises a power distribution network measurement unit and a power distribution network scheduling unit, the power distribution network measurement control module measures data of frequency, power, voltage, current and phase difference in a circuit in a state that a stabilized voltage power supply is transmitted in a power grid, then the data are processed through a signal transmission central control module according to the measured data, the power distribution network measurement unit measures data of current, voltage and power on the power grid and transmits the data to a processor through signals, and the power distribution network scheduling unit processes the data of the power distribution network measurement unit through the processor and utilizes a computer to edit a code instruction DG to perform coordination control.
9. The method of the coordinated control system of the distributed power generation microgrid technology of any of claims 1 to 8, characterized in that: the method for the coordinated control system of the distributed power generation microgrid technology specifically comprises the following steps:
s1, firstly, a distributed power source is utilized to connect distributed power generation into a power grid system by adopting an interface inverter;
s2, forming a microgrid control system by the distributed power sources and the corresponding loads in the power grid system according to a topological structure;
s3, monitoring the charge state of the distributed power generation system in the microgrid in real time, establishing a small-signal dynamic model, analyzing influence parameters influencing the coordination control of the microgrid, and optimizing and adjusting the control parameters;
s4, in the coordination control of distributed power generation, the microgrid system carries out intelligent hierarchical control on a distributed power source, adopts a droop control method to change inverter control and distributes power to connected loads in a balanced manner;
and S5, finally, the coordination control system intelligently distributes the maximum power of the distributed generation to the load and intelligently adjusts the parameters of the power grid through the power grid communication technology to control the normal operation of the system.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117254586A (en) * | 2023-09-14 | 2023-12-19 | 山东华科信息技术有限公司 | Distributed energy grid-connected monitoring regulation and control system |
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