CN208226581U - A kind of light storage micro-grid system - Google Patents
A kind of light storage micro-grid system Download PDFInfo
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- CN208226581U CN208226581U CN201820540796.3U CN201820540796U CN208226581U CN 208226581 U CN208226581 U CN 208226581U CN 201820540796 U CN201820540796 U CN 201820540796U CN 208226581 U CN208226581 U CN 208226581U
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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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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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Abstract
The utility model provides a kind of light storage micro-grid system, and low-pressure side DC bus passes through multiple transformer access bulk power grids respectively, allows low-pressure side DC bus to access large capacity energy-storage system, without replacing high-power transformer；Also, by the control of control system, its photovoltaic system, the first energy-storage system and each second energy-storage system can be made to pass through switch accordingly respectively and be connected with low-pressure side ac bus, can be worked normally when bulk power grid has electricity；Pass through the control of control system, the photovoltaic system and each second energy-storage system can also be made to pass through switch accordingly respectively to be connected with the first energy-storage system, in bulk power grid power-off, larger sub- microgrid is formed, first energy-storage system and each second energy-storage system are able to extend the charging time of microgrid and dissolve photovoltaic power generation.
Description
Technical field
The utility model relates to technical field of photovoltaic power generation, in particular to a kind of light stores up micro-grid system.
Background technique
Photovoltaic power generation provides necessary support by bulk power grid, in the case where bulk power grid has a power failure, for factors such as safety
The considerations of, photovoltaic must off-grid operation.Therefore, the prior art forms it into microgrid, big usually by adding energy storage facility
Photovoltaic power generation is dissolved when grid cut-off.
Energy-storage system accesses the transfer efficiency highest of 400V AC low-tension side, but powerful energy-storage system is to access side
Transformer capacity requirement it is higher, meanwhile, the capacity for the switchgear being connected with energy-storage system is also bigger, and its battery is necessary
A part of capacity is reserved, so that project is integrally invested larger, is unfavorable for the flexible dilatation of energy-storage system.
Therefore, the prior art is difficult to realize the large capacity energy storage access of low-pressure side, causes under bulk power grid power blackout situation, standby electricity
Time is short, can not effectively dissolve photovoltaic power generation.
Utility model content
The utility model provides a kind of light storage micro-grid system, to extend the charging time of microgrid under bulk power grid power blackout situation
And dissolve photovoltaic power generation.
To achieve the above object, technical solution provided by the present application is as follows:
A kind of light stores up micro-grid system, comprising: photovoltaic system, multiple transformers, control system, first energy-storage system and
N-1 the second energy-storage systems, N are the positive integer greater than 1；Wherein:
First energy-storage system is by the way that quickly simultaneously off-network switching switch is connected with low-pressure side ac bus；
The exchange side of the photovoltaic system and N-1 second energy-storage systems pass through respective first controllable switch respectively
It is connected with low-pressure side ac bus；
The low-pressure side of multiple transformers is connected with the low-pressure side DC bus respectively；The height of multiple transformers
Pressure side is connected with bulk power grid；
The exchange side of the photovoltaic system and N-1 second energy-storage systems pass through respective second controllable switch respectively
It is connected with first energy-storage system；
The control system and first energy-storage system, the control terminal of each first controllable switch and each described
The control terminal of second controllable switch is connected.
Preferably, the control system includes: N number of off-network controller；Wherein:
The test side of off-network controller is connected with first energy-storage system；
The output end of the off-network controller control terminal and described second with first controllable switch of correspondence system respectively
The control terminal of controllable switch is connected.
Preferably, the off-network controller includes: detection module, communication module, processing module and output module；Wherein:
The input terminal of the detection module is connected with first energy-storage system；
The output end of the detection module is connected with the input terminal of the processing module；
The communication ends of the processing module are connected with the communication module；
The control that the output end of the processing module passes through the output module and first controllable switch of correspondence system
The control terminal of end processed and second controllable switch is connected.
Preferably, the control system includes: detection module, communication module, processing module and N number of output module；Wherein:
The input terminal of the detection module is connected with first energy-storage system；
The output end of the detection module is connected with the input terminal of the processing module；
The communication ends of the processing module are connected with the communication module；
The output end of the processing module is connected with the input terminal of N number of output module respectively；
The output end of N number of output module respectively with the control terminal of first controllable switch of N number of system and described
The control terminal of second controllable switch is corresponding to be connected；N number of system includes the photovoltaic system and N-1 second energy storage systems
System.
Preferably, first energy-storage system is connected with the feeder ear that the first kind loads；The low-pressure side DC bus with
The feeder ear of second class load is connected.
Preferably, when bulk power grid has electricity, described quickly simultaneously off-network switching switch and each first controllable switch are
Closed state, each second controllable switch is off-state.
Preferably, when bulk power grid has electricity, the photovoltaic system generates electricity can be preferential grid-connected；First energy-storage system and each
A second energy-storage system preferentially dissolves photovoltaic power generation, and first energy-storage system and each second energy-storage system
Operating mode includes tou power price and peak load shifting.
Preferably, when bulk power grid powers off, described quickly simultaneously off-network switching switch and each first controllable switch are
Off-state, each second controllable switch is closed state.
Preferably, when bulk power grid powers off, first energy-storage system works in V/F mode；
It can be preferably load supplying that the photovoltaic system, which generates electricity,；
The photovoltaic system generates electricity when can be load supplying and have surplus, and each second energy-storage system, which works in, to be deposited
Store up power mode；
The photovoltaic system generates electricity when can be not enough to as load supplying, and each second energy-storage system works in tracking
Load pattern.
Light provided by the utility model stores up micro-grid system, and it is big that low-pressure side DC bus passes through multiple transformer accesses respectively
Power grid allows low-pressure side DC bus to access large capacity energy-storage system, without replacing high-power transformer；Also, it is logical
The control of control system is crossed, its photovoltaic system, the first energy-storage system and each second energy-storage system can be made to pass through respectively accordingly
Switch be connected with low-pressure side ac bus, can be worked normally when bulk power grid has electricity；Pass through the control of control system, moreover it is possible to
Enough make the photovoltaic system and each second energy-storage system pass through switch accordingly respectively to be connected with the first energy-storage system, in bulk power grid
When power-off, larger sub- microgrid is formed, first energy-storage system and each second energy-storage system are able to extend the charging time of microgrid
And dissolve photovoltaic power generation.
Detailed description of the invention
It, below will be to embodiment in order to illustrate more clearly of the technical solution in the utility model embodiment or the prior art
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, interior attached drawing is described below only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of light storage micro-grid system provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram for the off-network controller that another embodiment of the utility model provides；
Fig. 3 is the structural schematic diagram for the control system that another embodiment of the utility model provides.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.It is based on
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall in the protection scope of this application.
The utility model provides a kind of light storage micro-grid system, to extend the charging time of microgrid under bulk power grid power blackout situation
And dissolve photovoltaic power generation.
Referring to Fig. 1, light storage micro-grid system includes: photovoltaic system PV, multiple transformers, control system, first storage
(ESS2 to ESSN), N are the positive integer greater than 1 to ESS1 and N-1 the second energy-storage systems of energy system；Wherein:
First energy-storage system ESS1 is by the way that quickly simultaneously off-network switching switch ATS is connected with low-pressure side ac bus；
The exchange side of photovoltaic system PV is connected by the first controllable switch S1 of itself with low-pressure side ac bus；N-1
(ESS2 to ESSN) passes through respective first controllable switch (S2 to SN) and low-pressure side ac bus phase to second energy-storage system respectively
Even；
The low-pressure side of multiple transformers is connected with low-pressure side DC bus respectively；The high-pressure side of multiple transformers and bulk power grid
It is connected；
The exchange side of photovoltaic system PV is connected by the second controllable switch K1 of itself with the first energy-storage system ESS1；N-1
(ESS2 to ESSN) passes through respective second controllable switch (K2 to KN) and the first energy-storage system to a second energy-storage system respectively
ESS1 is connected；
Control system and the first energy-storage system ESS1, each first controllable switch (control terminal of S1 to SN) and each second
(control terminal of K1 to KN) is connected controllable switch.
It in the present embodiment, is accessed below different transformers using multiple energy-storage systems, for example, can be by 1MWh
Energy-storage system split into two 500KWh energy-storage system be linked into the transformer of two low-pressure sides in the following, make this light store up microgrid
System, which does not have to replacement high-power transformer, can be realized low-pressure side large capacity energy storage access, improve the feasible of energy-storage system access
Property and economy.
Also, light storage micro-grid system provided in this embodiment can make its photovoltaic system by the control of control system
(ESS2 to ESSN) passes through switch and low-pressure side accordingly respectively for PV, the first energy-storage system ESS1 and each second energy-storage system
Ac bus is connected, and can work normally when bulk power grid has electricity；Moreover, the control for passing through control system, additionally it is possible to make the light
(ESS2 to ESSN) passes through switch accordingly and the first energy-storage system ESS1 phase respectively for volt system PV and each second energy-storage system
Even, in bulk power grid power-off, larger sub- microgrid is formed, (ESS2 is extremely for the first energy-storage system ESS1 and each second energy-storage system
ESSN it) is able to extend the charging time of microgrid and dissolves photovoltaic power generation.
In practical application, when bulk power grid power-off, in order to further extend the charging time of microgrid, it can choose only
The light stores up the important load power supply in micro-grid system institute bringing onto load, and suspending is some insignificant load supplyings, therefore, Ke Yishe
The feeder ear for setting first kind load (i.e. important load) is connected with the first energy-storage system ESS1, and it is (i.e. non-that the load of the second class is arranged
Important load) feeder ear be connected with low-pressure side DC bus.
In this way, control system control is quickly and off-network switching switch ATS and each first is controllably opened when bulk power grid has electricity
Close that (S1 to SN) is closed state, and controls each second controllable switch (K1 to KN) is off-state, then photovoltaic system
(ESS2 to ESSN) is incorporated to bulk power grid, each to load also equal energy for PV, the first energy-storage system ESS1 and each second energy-storage system
It is enough to receive power supply.At this point, photovoltaic system PV generates electricity, energy is preferential grid-connected；First energy-storage system ESS1 and each second energy-storage system
(ESS2 to ESSN) preferentially dissolves photovoltaic power generation, and according to photovoltaic power generation quantity predictive information, electricity is stored, and arrives load function
When rate is larger, energy is discharged；And first energy-storage system ESS1 and each second energy-storage system (Working mould of ESS2 to ESSN)
Formula includes tou power price and peak load shifting, it is not limited to this, it can be depending on its specific application environment, the application's
In protection scope.
And when bulk power grid power-off, quickly and off-network switching switch ATS is rapidly switched off, the first energy-storage system ESS1 conduct
Off-network main power source operates under V/F mode, that is, output voltage is controlled while changing frequency, to provide reliable and stable reference
Voltage.Control system controls each first controllable switch, and (S1 to SN) is off-state, and controls each second controllable switch
(K1 to KN) is closed state, and making photovoltaic system PV and each second energy-storage system, (ESS2 to ESSN) accesses the main electricity of off-network
Source；Then the control system will also issue control instruction to photovoltaic system PV and each second energy-storage system (ESS2 to ESSN),
Make photovoltaic system PV and each second energy-storage system (ESS2 to ESSN) from due to isolated island protection and state out of service can
By starting；At this point, it can be preferably first kind load supplying that photovoltaic system PV, which generates electricity, each energy-storage system primarily serves smooth light
Lie prostrate the effect of power generation；If photovoltaic system PV, which generates electricity, can be first kind load supplying and have surplus, each second energy-storage system
(ESS2 to ESSN) works in storage power mode；And if photovoltaic system PV generate electricity can deficiency think first kind load supplying very
When cannot extremely generate electricity, each second energy-storage system (ESS2 to ESSN) forms big energy storage microgrid, works in follow load mode,
Load charging time can significantly be extended.
Another embodiment of the utility model additionally provides a kind of specific light storage micro-grid system, on the basis of above-described embodiment
On, it is preferred that its control system includes: N number of off-network controller；Wherein:
The test side of off-network controller is connected with the first energy-storage system ESS1；
The output end of off-network controller respectively with the control terminal and the second controllable switch of the first controllable switch of correspondence system
Control terminal be connected.
Specifically, in N number of off-network controller: the output end of an off-network controller can with the first of photovoltaic system PV
The control terminal of the control terminal and the second controllable switch K1 of controlling switch S1 is connected, control photovoltaic system PV and off-grid operation；Another
The control terminal and the second controllable switch K2 of the first controllable switch S2 of the output end of off-network controller and the second energy-storage system ESS2
Control terminal be connected, control the second energy-storage system ESS2 and off-grid operation；And so on, the last one off-network controller it is defeated
Outlet is connected with the control terminal of the control terminal of the first controllable switch SN of the second energy-storage system ESSN and the second controllable switch KN,
Control the second energy-storage system ESSN and off-grid operation.
The main function of off-network controller include: detection as off-network main power source the first energy-storage system ESS1 voltage,
Frequency；And judge whether bulk power grid has electricity, in bulk power grid power-off, by system (the second energy-storage system or the photovoltaic of control
System) access off-network main power source, form larger range of microgrid；And when bulk power grid has electricity, by system (the second energy storage of control
System or photovoltaic system) it is cut off from off-network main power source, access bulk power grid.
Preferably, referring to fig. 2, the off-network controller include: detection module 101, communication module 102, processing module 103 and
Output module 104；Wherein:
The input terminal of detection module 101 is connected with the first energy-storage system ESS1；
The output end of detection module 101 is connected with the input terminal of processing module 103；
The communication ends of processing module 103 are connected with communication module 102；
The output end of processing module 103 by the control terminal of the first controllable switch of output module 104 and correspondence system and
The control terminal of second controllable switch is connected.
Detection module 101 is used to detect the voltage of the first energy-storage system ESS1 as off-network main power source, frequency；Communicate mould
Other controllers in block 102 and the light storage micro-grid system are communicated, for example, controller inside each energy-storage system and
The controller etc. of grid-connected contactor on-off is controlled, herein without limitation；Processing module 103 for judging whether bulk power grid has electricity,
In bulk power grid power-off, by the output signal of output module 104 by system (the second energy-storage system or the photovoltaic system of control
System) access off-network main power source, form larger range of microgrid；And when bulk power grid has electricity, believed by the output of output module 104
Number by the system (the second energy-storage system or photovoltaic system) of control from off-network main power source cut off, access bulk power grid.
Alternatively, each second energy-storage system and photovoltaic system can also share the same control equipment, at this point, the control system
System is as shown in Figure 3, comprising: detection module 201, communication module 202, processing module 203 and N number of output module 204；Wherein:
The input terminal of detection module 201 is connected with the first energy-storage system ESS1；
The output end of detection module 201 is connected with the input terminal of processing module 203；
The communication ends of processing module 203 are connected with communication module 202；
The output end of processing module 203 is connected with the input terminal of N number of output module 204 respectively；
The output end of N number of output module 204 is controllably opened with the control terminal of the first controllable switch of N number of system and second respectively
The control terminal of pass is corresponding to be connected；Above-mentioned N number of system includes PV and N-1 the second energy-storage system (ESS2 to ESSN) of photovoltaic system.
The concrete principle of the control system is similar to the above at this time, and details are not described herein again.
Remaining principle that this light stores up micro-grid system is same as the previously described embodiments, no longer repeats one by one herein.
Each embodiment is described in a progressive manner in the utility model, the highlights of each of the examples are with its
The difference of his embodiment, the same or similar parts in each embodiment may refer to each other.
The above descriptions are merely preferred embodiments of the present invention, not makees in any form to the utility model
Limitation.Although the utility model has been disclosed with preferred embodiment as above, it is not intended to limit the utility model.It is any ripe
Those skilled in the art is known, in the case where not departing from technical solutions of the utility model ambit, all using the side of the disclosure above
Method and technology contents make many possible changes and modifications to technical solutions of the utility model, or be revised as equivalent variations etc.
Imitate embodiment.Therefore, all contents without departing from technical solutions of the utility model, according to the technical essence of the utility model to
Any simple modifications, equivalents, and modifications that upper embodiment is done still fall within the model of technical solutions of the utility model protection
In enclosing.
Claims (9)
1. a kind of light stores up micro-grid system characterized by comprising photovoltaic system, multiple transformers, control system, one first
Energy-storage system and N-1 the second energy-storage systems, N are the positive integer greater than 1；Wherein:
First energy-storage system is by the way that quickly simultaneously off-network switching switch is connected with low-pressure side ac bus；
The exchange side of the photovoltaic system and N-1 second energy-storage systems pass through respectively respective first controllable switch with it is low
Side ac bus is pressed to be connected；
The low-pressure side of multiple transformers is connected with the low-pressure side DC bus respectively；The high-pressure side of multiple transformers
It is connected with bulk power grid；
The exchange side of the photovoltaic system and N-1 second energy-storage systems pass through respective second controllable switch and institute respectively
The first energy-storage system is stated to be connected；
The control system and first energy-storage system, the control terminal of each first controllable switch and each described second
The control terminal of controllable switch is connected.
2. light according to claim 1 stores up micro-grid system, which is characterized in that the control system includes: N number of off-network control
Device；Wherein:
The test side of off-network controller is connected with first energy-storage system；
The output end of off-network controller respectively with the control terminal of first controllable switch of correspondence system and described second controllable
The control terminal of switch is connected.
3. light according to claim 2 stores up micro-grid system, which is characterized in that the off-network controller include: detection module,
Communication module, processing module and output module；Wherein:
The input terminal of the detection module is connected with first energy-storage system；
The output end of the detection module is connected with the input terminal of the processing module；
The communication ends of the processing module are connected with the communication module；
The control terminal that the output end of the processing module passes through the output module and first controllable switch of correspondence system
And the control terminal of second controllable switch is connected.
4. light according to claim 1 stores up micro-grid system, which is characterized in that the control system includes: detection module, leads to
Believe module, processing module and N number of output module；Wherein:
The input terminal of the detection module is connected with first energy-storage system；
The output end of the detection module is connected with the input terminal of the processing module；
The communication ends of the processing module are connected with the communication module；
The output end of the processing module is connected with the input terminal of N number of output module respectively；
The output end of the N number of output module control terminal and described second with first controllable switch of N number of system respectively
The control terminal of controllable switch is corresponding to be connected；N number of system includes the photovoltaic system and N-1 second energy-storage systems.
5. light according to claim 1 stores up micro-grid system, which is characterized in that first energy-storage system and the first kind load
Feeder ear be connected；The low-pressure side DC bus is connected with the feeder ear that the second class loads.
6. -5 any light store up micro-grid system according to claim 1, which is characterized in that described quick when bulk power grid has electricity
And off-network switching switch and each first controllable switch are closed state, each second controllable switch is to disconnect
State.
7. light according to claim 6 stores up micro-grid system, which is characterized in that when bulk power grid has electricity, the photovoltaic system institute
Power generation can be preferential grid-connected；First energy-storage system and each second energy-storage system preferentially dissolve photovoltaic power generation, and described
The operating mode of first energy-storage system and each second energy-storage system includes tou power price and peak load shifting.
8. -5 any light store up micro-grid system according to claim 1, which is characterized in that described quick when bulk power grid powers off
And off-network switching switch and each first controllable switch are off-state, each second controllable switch is closure
State.
9. light according to claim 8 stores up micro-grid system, which is characterized in that when bulk power grid powers off, first energy storage system
System works in V/F mode；
It can be preferably load supplying that the photovoltaic system, which generates electricity,；
The photovoltaic system generates electricity when can be load supplying and have surplus, and each second energy-storage system works in storage electricity
It can mode；
The photovoltaic system generates electricity when can be not enough to as load supplying, and each second energy-storage system works in follow load
Mode.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474429A (en) * | 2020-04-16 | 2020-07-31 | 阳光电源股份有限公司 | Aging mutual-aid system and method of light storage all-in-one machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474429A (en) * | 2020-04-16 | 2020-07-31 | 阳光电源股份有限公司 | Aging mutual-aid system and method of light storage all-in-one machine |
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Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee after: Sunshine New Energy Development Co.,Ltd. Address before: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee before: Sunshine New Energy Development Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| CP03 | Change of name, title or address |
Address after: High tech Zone of Hefei city of Anhui Province in 230088 Lake Road No. 2 Patentee after: Sunshine New Energy Development Co.,Ltd. Address before: 230000 second floor, scientific research building, sunshine power plant, No.2, Tianhu Road, hi tech Zone, Hefei City, Anhui Province Patentee before: HEFEI SUNGROW RENEWABLE ENERGY SCI. & TECH. Co.,Ltd. |
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| CP03 | Change of name, title or address |