CN108039715A - PCC point zero energys control method, system and device - Google Patents
PCC point zero energys control method, system and device Download PDFInfo
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
The present invention relates to a kind of PCC point zero energys control method, system and device, the described method includes：The direction of the flow of power of the PCC points is judged according to the current signal of the PCC of collection points；Charge mode or discharge mode are switched to according to the flow of power direction controlling energy storage device of the PCC points；Control PCC points power described in the energy storage device real-Time Compensation so that the PCC points realize that zero energy exports.Current signal at the PCC points of collection in real time of the invention, the output of energy storage device is calculated further according to current signal, so as to carry out real-Time Compensation to PCC points power, and then realizes that the zero energy at PCC points exports.The present invention carries out real-Time Compensation by introducing energy storage device to PCC points, realizes the zero energy output at PCC points, solves the problems, such as the power swing at PCC points, reduce waste of energy, improve power distribution network quality.
Description
【Technical field】
The present invention relates to field of distribution network, more particularly to a kind of PCC point zero energys control method, system and device.
【Background technology】
A kind of important form of the photovoltaic generation as Solar use, with the decline of use cost, worldwide
Start and applied climax.In recent years, China has also put into effect a series of policies in succession, supports the popularization of photovoltaic generation.However, big
During amount access photovoltaic generation, the power quality problems such as harmonic wave, flickering are caused, the above problem can be to the safety of power distribution network
Operation has some impact on.Meanwhile photovoltaic generation has the characteristics that intermittent, randomness in itself, make power distribution network can not to its into
Row fast and effectively regulates and controls.At the beginning of 21 century, scholar proposes the concept of micro-capacitance sensor, it is desirable to makes light by the form of photovoltaic micro
Volt power generation accesses power distribution network more with open arms, and can participate in power distribution network cooperative scheduling.But at present, photovoltaic micro is dispatched
The design that the research of aspect focuses mostly in optimisation strategy and algorithm, such as, economic load dispatching is carried out to micro-capacitance sensor, concentrates research fuel
Every Runing e conomy indicators such as cost, initial outlay depreciable cost, operation expense, environmentally friendly cost, power failure cost of compensation
Computational methods, its object is to optimize its resource distribution, the discharge of reduction polluted gas, realize the efficient micro- for giving to improve of the energy
The economy of network operation.But in the studies above, only it is directed to providing optimal dispatching method in macroscopic perspective, have ignored PCC
Realtime power flowing, the power quality problem such as harmonic wave, flickering can not obtain effectively caused by a large amount of accesses of photovoltaic generation
Solve.Therefore, although the prior art can bring income on the whole, can not effectively be adjusted specific to some moment
Control so that power consumption can not be effectively utilized in power transmission.
【The content of the invention】
The present invention provides a kind of PCC point zero energys control method, system and device, and the micro- electricity of photovoltaic is realized by energy storage device
PCC point (the points of common connection of net：Point of Common Coupling) place zero energy output, solve photovoltaic micro
The problem of power swing at PCC points, reduce waste of energy, improve power distribution network quality.
First aspect according to embodiments of the present invention, there is provided a kind of PCC points zero energy control method, including：
The direction of the flow of power of the PCC points is judged according to the current signal of the PCC of collection points；
Charge mode or discharge mode are switched to according to the flow of power direction controlling energy storage device of the PCC points；
Control PCC points power described in the energy storage device real-Time Compensation so that the PCC points realize that zero energy exports.
In certain embodiments, the current signal of the PCC points according to collection judges the flow of power of the PCC points
Before direction, further include：
The current signal of PCC points is gathered by external impressed current mutual inductor, and by the current signal of the PCC points collected
Export to energy storage device.
In certain embodiments, the current signal of the PCC points according to collection judges the flow of power of the PCC points
Direction, including：
The energy storage device is made according to obtaining the current signal of the PCC points collected and the voltage of power distribution network
The watt level of PCC points, and whether the flow of power direction of the definite PCC points is to flow into the power distribution network.
In certain embodiments, the flow of power direction controlling energy storage device according to the PCC points switches to charging
Pattern or discharge mode, including：
When the flow of power direction of the PCC points is flows into the power distribution network, control the energy storage device to switch to and fill
Power mode；
It is not when flowing into the power distribution network, to control the energy storage device to switch in the flow of power direction of the PCC points
Discharge mode.
In certain embodiments, PCC point power described in the control energy storage device real-Time Compensation so that the PCC
Point realizes that zero energy exports, including：
The watt level of the PCC points and flow of power direction are exported to PID controller；
The AC-DC conversion unit real-Time Compensation of energy storage device described in the Duty ratio control exported according to the PID controller
The PCC points power so that the PCC points realize that zero energy exports.
Second aspect according to embodiments of the present invention, also provides a kind of PCC points zero energy control system, including：
Judgment module, the current signal for the PCC points according to collection judge the direction of the flow of power of the PCC points；
Handover module, for according to the flow of power direction controlling energy storage device of the PCC points switch to charge mode or
Discharge mode；
Compensating module, for controlling PCC points power described in the energy storage device real-Time Compensation so that the PCC points are realized
Zero energy exports.
In certain embodiments, the system also includes acquisition module, the acquisition module to pass through external impressed current mutual inductor
The current signal of PCC points is gathered, and the current signal of the PCC points collected is exported to energy storage device；
The judgment module is additionally operable to the current signal and distribution of the PCC points collected according to the acquisition module
The voltage of net obtains the watt level of the PCC points, and whether the flow of power direction of the definite PCC points is to match somebody with somebody described in inflow
Power grid.
In certain embodiments, the handover module is additionally operable in the flow of power direction of the PCC points as described in inflow
During power distribution network, the energy storage device is controlled to switch to charge mode；It is not described in inflow in the flow of power direction of the PCC points
During power distribution network, the energy storage device is controlled to switch to discharge mode.
In certain embodiments, the compensating module is additionally operable to the watt level of the PCC points and flow of power direction
Export to PID controller；The AC-DC conversion unit of energy storage device described in the Duty ratio control exported according to the PID controller
PCC points power described in real-Time Compensation so that the PCC points realize that zero energy exports.
The third aspect according to embodiments of the present invention, also provides a kind of PCC points zero energy control device, including PCC points, matches somebody with somebody
Power grid, energy storage device, local load and power station；The energy storage device is embedded in inside the power station or is connected to the PCC
Point, local load, the power station and the power distribution network are all connected to the PCC points；
The energy storage device is used for the flow of power that the PCC points are judged according to the current signal of the PCC points of collection
Direction；Charge mode or discharge mode are switched to according to the flow of power direction controlling energy storage device of the PCC points；And in real time
Compensate the PCC points power so that the PCC points realize that zero energy exports.
In certain embodiments, the energy storage device is additionally operable to gather the electric current letter of PCC points by external impressed current mutual inductor
Number；The watt level of the PCC points is obtained according to the voltage of the current signal of the PCC points collected and power distribution network, and
Whether the flow of power direction for determining the PCC points is to flow into the power distribution network；
The energy storage device is additionally operable to, when the flow of power direction of the PCC points is flows into the power distribution network, switch to
Charge mode；It is not when flowing into the power distribution network, to switch to discharge mode in the flow of power direction of the PCC points；
The energy storage device is additionally operable to receive watt level and flow of power of the PID controller according to the PCC points
The duty cycle of direction output；And the PCC point power according to the duty cycle real-Time Compensation that the PID controller exports so that institute
State PCC points and realize that zero energy exports.
Technical solution provided in an embodiment of the present invention can produce following beneficial effect：The PCC points zero energy control method
Including：The direction of the flow of power of the PCC points is judged according to the current signal of the PCC of collection points；According to the work(of the PCC points
Rate flow direction control energy storage device switches to charge mode or discharge mode；Control described in the energy storage device real-Time Compensation
PCC point power so that the PCC points realize that zero energy exports.Current signal at the PCC points of collection in real time of the invention (obtains electricity
Flow the data such as size)；The output of energy storage device is calculated further according to current signal, so that real-Time Compensation is carried out to PCC points power,
And then realize that the zero energy at PCC points exports.The present invention carries out real-Time Compensation by introducing energy storage device to PCC points, realizes PCC
Zero energy output at point, solves the problems, such as the power swing at PCC points, reduces waste of energy, improve power distribution network matter
Amount.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by the explanations write
Specifically noted structure is realized and obtained in book, claims and attached drawing.
Below by drawings and examples, technical scheme is described in further detail.
【Brief description of the drawings】
Fig. 1 is a kind of flow chart of PCC point zero energy control method of the present invention according to an exemplary embodiment；
Fig. 2 is the flow chart of another PCC point zero energy control method of the present invention according to an exemplary embodiment；
Fig. 3 is the step S30 of another PCC point zero energy control method of the present invention according to an exemplary embodiment
Flow chart；
Fig. 4 is a kind of block diagram of PCC point zero energy control system of the present invention according to an exemplary embodiment；
Fig. 5 is the block diagram of another PCC point zero energy control system of the present invention according to an exemplary embodiment；
Fig. 6 is a kind of structural representation of PCC point zero energy control device of the present invention according to an exemplary embodiment
Figure.
【Embodiment】
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, it is right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is only to explain the present invention, not
For limiting the present invention.
As shown in Figures 1 to 6, the embodiment of the present disclosure provides a kind of PCC point zero energys control method, system and device,
Realize that the zero energy at the PCC points of photovoltaic micro is exported by energy storage device, solve the power at photovoltaic micro PCC points
The problem of fluctuation, reduce waste of energy, improves power distribution network quality.As shown in Figure 1 and Figure 6, the method comprising the steps of S10-
S30：
In step slo, the side of the flow of power of the PCC points 10 is judged according to the current signal of the PCC of collection points 10
To；Intelligible, energy storage device 30 can gather the current signal at PCC points 10, the electric current by external current transformer
Signal includes but is not limited to the size for electric current.Energy storage device 30 is embedded in the inside of power station 50 or is connected to PCC points 10.Due to
The scene difference of photovoltaic micro installation is huge, and energy storage device 30 and actual 10 potential range of PCC points are farther out.Using external electricity
The actual installations such as sampled point caused by current transformer collection current signal can solve the otherness of installation site is remote, wall stops
Problem.Meanwhile external current transformer sampling can also avoid the passing time caused by communication modes from postponing.Hereafter, energy storage
Device 30 judges the direction of the flow of power at the PCC points 10 using the current signal that current transformer is fed back.
In step S20, charge mode is switched to according to the flow of power direction controlling energy storage device 30 of the PCC points 10
Or discharge mode；That is, energy storage device 30 judges the power at the PCC points 10 using the current signal that current transformer is fed back
The direction of flowing, and determine energy storage device 30 charge still according to the flow of power direction and discharge.Since power distribution network 20 is
Alternating current, single 20 voltage of power distribution network or the current signal collected can not all provide the letter in effective flow of power direction
Breath, in one embodiment, it is necessary to carry out comprehensive descision power with reference to both 20 voltage of power distribution network and the current signal collected
Flow direction.That is, after the current signal two-way sampled signal for combining 20 voltage of power distribution network and collecting, PCC points are obtained
The necessary informations such as watt level and flow of power direction at 10.According to Shannon's sampling theorem, in order to correctly gather distribution
The power of net 20, sample frequency is predeterminated frequency, and sample frequency must be provided with enough to height.
In step s 30,10 power of PCC points described in 30 real-Time Compensation of energy storage device is controlled so that the PCC points 10
Realize that zero energy exports.That is, in this step, energy storage device 30 realizes the power at power closed-loop dynamic compensation PCC points 10.
As shown in fig. 6, since the change in power station 50 and local load 40 is all unpredictable, it is therefore necessary at real-time response PCC points 10
Disturbance and be compensated by.Energy storage device 30 is calculated at PCC points 10 with 50 voltage of power distribution network and the current signal collected
The variable such as watt level and flow of power direction, then inputs above-mentioned variable to PID (ratios：Proportion, integration：
Integral, derivative：Derivative) in controller, PCC points are compensated by the output control energy storage device 30 of PID controller
Power at 10, realizes the zero energy output at PCC points 10.In this embodiment, energy storage device 30 (such as energy storage inverter)
Obtain the power that PID controller gives, and the power at real-Time Compensation PCC points 10.Implementation of the present invention is simple, accomplishes to light
Lie prostrate the peak load shifting of microgrid power.In one embodiment, energy storage device 30 is connected to power station 50, that is, is embedded in power station
50 inverter internal is connected to PCC points 10.The energy storage device 30 is needed to be realized storage battery in the form of inverter and matched somebody with somebody
Energy exchange between power grid 20, this point are to carry out the basic demand of power back-off at PCC points.
The present invention calculates energy storage dress first by gathering the current signal at PCC points 10 in real time, further according to current signal
The output put, so as to carry out real-Time Compensation to 10 power of PCC points, and then realizes that the zero energy at PCC points 10 exports.The present invention is logical
Cross introducing energy storage device 30 and real-Time Compensation is carried out to PCC points 10, realize the zero energy output at PCC points 10, solve PCC points 10
The problem of power swing at place, reduce waste of energy, improve power distribution network quality.
In certain embodiments, as shown in Fig. 2, before the step S10, further include：
Step S40, the current signal of PCC points 10, and the PCC points that will be collected are gathered by external impressed current mutual inductor
10 current signal is exported to energy storage device 30.Intelligible, energy storage device 30 can be gathered by external current transformer
Current signal at PCC points 10, the current signal include but is not limited to the size for electric current.Using external current transformer
The actual installations such as sampled point caused by collection current signal can solve the problems, such as the otherness of installation site is remote, wall stops.Together
When, external current transformer sampling can also avoid the passing time caused by communication modes from postponing.It is intelligible, the electric current
Mutual inductor can also replace with Hall sensor.
In certain embodiments, the step S10 includes：The energy storage device 30 is made according to the PCC points collected
10 current signal and the voltage of power distribution network 20 obtain the watt level of the PCC points 10, and determine the work(of the PCC points 10
Whether rate flow direction is to flow into the power distribution network 20.That is, the current signal that energy storage device 30 is fed back using current transformer
Judge the direction of the flow of power at the PCC points 10.Since power distribution network 20 is alternating current, single 20 voltage of power distribution network or adopt
The current signal collected can not all provide the information in effective flow of power direction, therefore, in the present embodiment, with reference to power distribution network
Both 20 voltages and the current signal that collects carry out comprehensive descision flow of power direction.That is, combining the electricity of power distribution network 20
After the current signal two-way sampled signal pressed and collected, watt level and flow of power direction at acquisition PCC points 10 etc. must
Want information.
In certain embodiments, the step S20 includes：In the flow of power direction of the PCC points 10 for described in inflow
During power distribution network 20, the energy storage device 30 is controlled to switch to charge mode；It is not stream in the flow of power direction of the PCC points 10
When entering the power distribution network 20, the energy storage device 30 is controlled to switch to discharge mode.That is, in the present embodiment, according to described
10 flow of power direction of PCC points determines that energy storage device 30 charge or discharges.
In certain embodiments, the step S30 includes：
Step S301, the watt level of the PCC points 10 and flow of power direction are exported to PID controller；Energy storage fills
Put 30 and watt level and flow of power direction at PCC points 10 etc. are calculated with 50 voltage of power distribution network and the current signal that collects
Variable, then inputs above-mentioned variable into PID controller, and the output of energy storage device 30 is calculated using pid control algorithm, from
And realize that zero energy exports at points of common connection.
Step S302, the AC-DC conversion of energy storage device 30 according to the Duty ratio control that the PID controller exports
10 power of PCC points described in unit real-Time Compensation so that the PCC points 10 realize that zero energy exports.That is, energy storage device 30 obtains
The given power that PID controller is calculated according to pid control algorithm, and the power at real-Time Compensation PCC points 10, realize PCC points
Zero energy output at 10.
It is intelligible, the schedulability of photovoltaic micro mainly by the regulating power of it and 50 dominant eigenvalues of power distribution network Lai
Embody, can be controlled and realized by photovoltaic micro PCC points power tracking.Therefore, the present invention devise a kind of engineering practicability compared with
High PCC point power tracking control strategies；The PCC point zero energys control method of the present invention can be with quick response photovoltaic micro
Portion's changed power, solves the problems, such as that energy storage device is applied and reacts slow when zero energy exports, wastes electric energy；And the present invention only needs
An external current transformer is sampled, and solves the problems, such as the sample delay that communication modes are brought, and be easy in engineering
Realize.
Corresponding PCC points zero energy control method provided in an embodiment of the present invention, the present invention also provides the control of PCC points zero energy
System, as shown in figure 4, the system may include：
Judgment module 41, the current signal for the PCC points 10 according to collection judge the flow of power of the PCC points 10
Direction；
Handover module 42, for switching to charging according to the flow of power direction controlling energy storage device 30 of the PCC points 10
Pattern or discharge mode；
Compensating module 43, for controlling 10 power of PCC points described in 30 real-Time Compensation of energy storage device so that the PCC
Point 10 realizes that zero energy exports.
In certain embodiments, as shown in figure 5, the system also includes acquisition module 44, the acquisition module passes through outer
The current signal of current transformer collection PCC points 10 is connect, and the current signal of the PCC points 10 collected is exported to energy storage
Device 30；
The judgment module 41 be additionally operable to the PCC points 10 collected according to the acquisition module current signal and
The voltage of power distribution network 20 obtains the watt level of the PCC points 10, and determine the PCC points 10 flow of power direction whether be
Flow into the power distribution network 20.
In certain embodiments, it is inflow that the handover module 42, which is additionally operable in the flow of power direction of the PCC points 10,
During the power distribution network 20, the energy storage device 30 is controlled to switch to charge mode；In the flow of power direction of the PCC points 10 not
It is when flowing into the power distribution network 20, to control the energy storage device 30 to switch to discharge mode.
In certain embodiments, the compensating module 43 is additionally operable to the watt level and flow of power of the PCC points 10
Direction is exported to PID controller；The alternating current-direct current of energy storage device 30 turns described in the Duty ratio control exported according to the PID controller
Change 10 power of PCC points described in unit real-Time Compensation so that the PCC points 10 realize that zero energy exports.
Above-mentioned PCC points zero energy control system, carries out real-Time Compensation to PCC points 10 by introducing energy storage device 30, realizes
Zero energy output at PCC points 10, solves the problems, such as the power swing at PCC points 10, reduces waste of energy, improve and match somebody with somebody
Power grid quality.
Corresponding PCC points zero energy control method provided in an embodiment of the present invention, the present invention also provides the control of PCC points zero energy
Device, as shown in fig. 6, described device includes PCC points 10, power distribution network 20, energy storage device 30, local load 40 and power station 50；
The energy storage device 30 is embedded in the inside of power station 50 or is connected to the PCC points 10, the local load 40, the power generation
Stand 50 and the power distribution network 20 be all connected to the PCC points 10；The power station is photo-voltaic power generation station or wind energy power plant.
The energy storage device 30 is used for the work(that the PCC points 10 are judged according to the current signal of the PCC points 10 of collection
The direction of rate flowing；Charge mode or electric discharge are switched to according to the flow of power direction controlling energy storage device 30 of the PCC points 10
Pattern；And 10 power of PCC points described in real-Time Compensation so that the PCC points 10 realize that zero energy exports.
In certain embodiments, the energy storage device 30 is additionally operable to gather the electricity of PCC points 10 by external impressed current mutual inductor
Flow signal；The work(of the PCC points 10 is obtained according to the voltage of the current signal of the PCC points 10 collected and power distribution network 20
Rate size, and whether the flow of power direction of the definite PCC points 10 is to flow into the power distribution network 20；
The energy storage device 30 is additionally operable to when the flow of power direction of the PCC points 10 is flows into the power distribution network 20,
Switch to charge mode；It is not when flowing into the power distribution network 20, to switch to electric discharge mould in the flow of power direction of the PCC points 10
Formula；
The energy storage device 30 is additionally operable to receive watt level and power of the PID controller according to the PCC points 10
The duty cycle of flow direction output；And 10 power of PCC points according to the duty cycle real-Time Compensation that the PID controller exports,
So that the PCC points 10 realize that zero energy exports.
Above-mentioned PCC points zero energy control device, carries out real-Time Compensation to PCC points 10 by introducing energy storage device 30, realizes
Zero energy output at PCC points 10, solves the problems, such as the power swing at PCC points 10, reduces waste of energy, improve and match somebody with somebody
Power grid quality.
Corresponding PCC points zero energy control method provided in an embodiment of the present invention, the present invention also provides a kind of computer-readable
Storage medium, is stored with computer executable instructions, the computer executable instructions on the computer-readable recording medium
When being executed by processor so that the processor performs following steps：
The direction of the flow of power of the PCC points 10 is judged according to the current signal of the PCC of collection points 10；According to described
The flow of power direction controlling energy storage device 30 of PCC points 10 switches to charge mode or discharge mode；Control the energy storage device
10 power of PCC points described in 30 real-Time Compensations so that the PCC points 10 realize that zero energy exports.
In one embodiment, when computer executable instructions are executed by processor, also so that processor performs following step
Suddenly：Gather the current signal of PCC points 10 by external impressed current mutual inductor, and by the current signal of the PCC points 10 collected
Export to energy storage device 30.
In one embodiment, when computer executable instructions are executed by processor, also so that processor performs following step
Suddenly：The energy storage device 30 is made to obtain institute according to the current signal of the PCC points 10 collected and the voltage of power distribution network 20
The watt level of PCC points 10 is stated, and whether the flow of power direction of the definite PCC points 10 is to flow into the power distribution network 20.
In one embodiment, when computer executable instructions are executed by processor, also so that processor performs following step
Suddenly：When the flow of power direction of the PCC points 10 is flows into the power distribution network 20, control the energy storage device 30 to switch to and fill
Power mode；It is not when flowing into the power distribution network 20, to control the energy storage device 30 to cut in the flow of power direction of the PCC points 10
Shift to discharge mode.
In one embodiment, when computer executable instructions are executed by processor, also so that processor performs following step
Suddenly：The watt level of the PCC points 10 and flow of power direction are exported to PID controller；Exported according to the PID controller
Duty ratio control described in energy storage device 30 AC-DC conversion unit real-Time Compensation described in 10 power of PCC points so that the PCC
Point 10 realizes that zero energy exports.
Above computer readable storage medium storing program for executing, carries out real-Time Compensation to PCC points 10 by introducing energy storage device 30, realizes
Zero energy output at PCC points 10, solves the problems, such as the power swing at PCC points 10, reduces waste of energy, improve and match somebody with somebody
Power grid quality.
Corresponding PCC points zero energy control method provided in an embodiment of the present invention, the present invention also provides a kind of computer equipment,
Including memory and processor, computer-readable instruction is stored in the memory, the computer-readable instruction is described
When processor performs so that the processor performs following steps：
The direction of the flow of power of the PCC points 10 is judged according to the current signal of the PCC of collection points 10；According to described
The flow of power direction controlling energy storage device 30 of PCC points 10 switches to charge mode or discharge mode；Control the energy storage device
10 power of PCC points described in 30 real-Time Compensations so that the PCC points 10 realize that zero energy exports.
In one embodiment, when computer-readable instruction is executed by processor, also so that processor performs following steps：
The current signal of PCC points 10 is gathered by external impressed current mutual inductor, and the current signal of the PCC points 10 collected is exported
To energy storage device 30.
In one embodiment, when computer-readable instruction is executed by processor, also so that processor performs following steps：
The energy storage device 30 is made according to obtaining the current signal of the PCC points 10 collected and the voltage of power distribution network 20
The watt level of PCC points 10, and whether the flow of power direction of the definite PCC points 10 is to flow into the power distribution network 20.
In one embodiment, when computer-readable instruction is executed by processor, also so that processor performs following steps：
When the flow of power direction of the PCC points 10 is flows into the power distribution network 20, the energy storage device 30 is controlled to switch to charging
Pattern；It is not when flowing into the power distribution network 20, to control the energy storage device 30 to switch in the flow of power direction of the PCC points 10
To discharge mode.
In one embodiment, when computer-readable instruction is executed by processor, also so that processor performs following steps：
The watt level of the PCC points 10 and flow of power direction are exported to PID controller；Exported according to the PID controller
10 power of PCC points described in the AC-DC conversion unit real-Time Compensation of energy storage device 30 described in Duty ratio control so that the PCC points
10 realize that zero energy exports.
Above computer equipment, carries out real-Time Compensation to PCC points 10 by introducing energy storage device 30, realizes at PCC points 10
Zero energy output, solve the problems, such as the power swing at PCC points 10, reduce waste of energy, improve power distribution network quality.
It should be understood by those skilled in the art that, the embodiment of the present invention can be provided as method, system or computer program
Product.Therefore, the present invention can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the present invention can use the computer for wherein including computer usable program code in one or more
The shape for the computer program product that usable storage medium is implemented on (including but not limited to magnetic disk storage and optical memory etc.)
Formula.
The present invention be with reference to according to the method for the embodiment of the present invention, the flow of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that it can be realized by computer program instructions every first-class in flowchart and/or the block diagram
The combination of flow and/or square frame in journey and/or square frame and flowchart and/or the block diagram.These computer programs can be provided
The processors of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices is instructed to produce
A raw machine so that the instruction performed by computer or the processor of other programmable data processing devices, which produces, to be used in fact
The device for the function of being specified in present one flow of flow chart or one square frame of multiple flows and/or block diagram or multiple square frames.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that the instruction being stored in the computer-readable memory, which produces, to be included referring to
Make the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one square frame of block diagram or
The function of being specified in multiple square frames.
These computer program instructions can be also loaded into computer or other programmable data processing devices so that counted
Series of operation steps is performed on calculation machine or other programmable devices to produce computer implemented processing, thus in computer or
The instruction performed on other programmable devices is provided and is used for realization in one flow of flow chart or multiple flows and/or block diagram one
The step of function of being specified in a square frame or multiple square frames.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should all be included in the protection scope of the present invention.
Claims (11)
- A kind of 1. PCC points zero energy control method, it is characterised in that including：The direction of the flow of power of the PCC points is judged according to the current signal of the PCC of collection points；Charge mode or discharge mode are switched to according to the flow of power direction controlling energy storage device of the PCC points；Control PCC points power described in the energy storage device real-Time Compensation so that the PCC points realize that zero energy exports.
- 2. PCC points zero energy control method as claimed in claim 1, it is characterised in that the electricity of the PCC points according to collection Before stream signal judges the direction of flow of power of the PCC points, further include：The current signal of PCC points is gathered by external impressed current mutual inductor, and the current signal of the PCC points collected is exported To energy storage device.
- 3. PCC points zero energy control method as claimed in claim 2, it is characterised in that the electricity of the PCC points according to collection Stream signal judges the direction of the flow of power of the PCC points, including：The energy storage device is made to obtain the PCC according to the current signal of the PCC points collected and the voltage of power distribution network The watt level of point, and whether the flow of power direction of the definite PCC points is to flow into the power distribution network.
- 4. PCC points zero energy control method as claimed in claim 3, it is characterised in that the power according to the PCC points Flow direction control energy storage device switches to charge mode or discharge mode, including：When the flow of power direction of the PCC points is flows into the power distribution network, the energy storage device is controlled to switch to charging mould Formula；It is not when flowing into the power distribution network, to control the energy storage device to switch to electric discharge in the flow of power direction of the PCC points Pattern.
- 5. PCC points zero energy control method as claimed in claim 3, it is characterised in that the control energy storage device is real When compensate the PCC points power so that the PCC points realize zero energy export, including：The watt level of the PCC points and flow of power direction are exported to PID controller；Described in the AC-DC conversion unit real-Time Compensation of energy storage device described in the Duty ratio control exported according to the PID controller PCC point power so that the PCC points realize that zero energy exports.
- A kind of 6. PCC points zero energy control system, it is characterised in that including：Judgment module, the current signal for the PCC points according to collection judge the direction of the flow of power of the PCC points；Handover module, for switching to charge mode or electric discharge according to the flow of power direction controlling energy storage device of the PCC points Pattern；Compensating module, for controlling PCC points power described in the energy storage device real-Time Compensation so that the PCC points realize zero power Rate exports.
- 7. PCC points zero energy control system as claimed in claim 6, it is characterised in that the system also includes acquisition module, The acquisition module gathers the current signal of PCC points by external impressed current mutual inductor, and by the electric current of the PCC points collected Signal output is to energy storage device；The judgment module is additionally operable to the current signal and power distribution network of the PCC points that are collected according to the acquisition module Voltage obtains the watt level of the PCC points, and whether the flow of power direction of the definite PCC points is to flow into the distribution Net.
- 8. PCC points zero energy control system as claimed in claim 7, it is characterised in thatThe handover module is additionally operable to, when the flow of power direction of the PCC points is flows into the power distribution network, control the storage Energy device switches to charge mode；It is not when flowing into the power distribution network, to control the storage in the flow of power direction of the PCC points Energy device switches to discharge mode.
- 9. PCC points zero energy control system as claimed in claim 7, the compensating module is additionally operable to the work(of the PCC points Rate size and flow of power direction are exported to PID controller；Energy storage described in the Duty ratio control exported according to the PID controller PCC point power described in the AC-DC conversion unit real-Time Compensation of device so that the PCC points realize that zero energy exports.
- 10. a kind of PCC points zero energy control device, it is characterised in that including PCC points, power distribution network, energy storage device, local load And power station；The energy storage device is embedded in inside the power station or is connected to the PCC points, the local load, the hair Power station and the power distribution network are all connected to the PCC points；The energy storage device is used for the side that the flow of power of the PCC points is judged according to the current signal of the PCC points of collection To；Charge mode or discharge mode are switched to according to the flow of power direction controlling energy storage device of the PCC points；And real-Time Compensation The PCC points power so that the PCC points realize that zero energy exports.
- 11. PCC points zero energy control device as claimed in claim 10, it is characterised in that the energy storage device is additionally operable to lead to Cross the current signal of external impressed current mutual inductor collection PCC points；According to the current signal and power distribution network of the PCC points collected Voltage obtain the watt level of the PCC points, and determine whether the flow of power directions of the PCC points is to flow into the distribution Net；The energy storage device is additionally operable to, when the flow of power direction of the PCC points is flows into the power distribution network, switch to charging Pattern；It is not when flowing into the power distribution network, to switch to discharge mode in the flow of power direction of the PCC points；The energy storage device is additionally operable to receive watt level and flow of power direction of the PID controller according to the PCC points The duty cycle of output；And the PCC point power according to the duty cycle real-Time Compensation that the PID controller exports so that the PCC Point realizes that zero energy exports.
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| CN201711240033.3A CN108039715A (en) | 2017-11-30 | 2017-11-30 | PCC point zero energys control method, system and device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532214A (en) * | 2013-09-17 | 2014-01-22 | 南京航空航天大学 | Photovoltaic power generation system structure integrating energy storage and grid-connected and off-grid power supply functions and control method |
| EP3206275A1 (en) * | 2016-02-10 | 2017-08-16 | Eguana Technologies | Output control and compensation for ac coupled systems |
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2017
- 2017-11-30 CN CN201711240033.3A patent/CN108039715A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532214A (en) * | 2013-09-17 | 2014-01-22 | 南京航空航天大学 | Photovoltaic power generation system structure integrating energy storage and grid-connected and off-grid power supply functions and control method |
| EP3206275A1 (en) * | 2016-02-10 | 2017-08-16 | Eguana Technologies | Output control and compensation for ac coupled systems |
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