CN112994062A - Energy storage system and alternating current power grid - Google Patents
Energy storage system and alternating current power grid Download PDFInfo
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- CN112994062A CN112994062A CN202110342313.5A CN202110342313A CN112994062A CN 112994062 A CN112994062 A CN 112994062A CN 202110342313 A CN202110342313 A CN 202110342313A CN 112994062 A CN112994062 A CN 112994062A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 112
- 230000002457 bidirectional effect Effects 0.000 claims abstract description 15
- 238000012546 transfer Methods 0.000 claims abstract description 15
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 230000009977 dual effect Effects 0.000 claims description 2
- 230000004992 fission Effects 0.000 claims description 2
- 241001672018 Cercomela melanura Species 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 description 14
- 238000010248 power generation Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 4
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- 230000008859 change Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012806 monitoring device Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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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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- 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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- Engineering & Computer Science (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The application provides an energy storage system and an alternating current power grid, this energy storage system includes: the battery module comprises a plurality of single batteries; the energy storage converter is electrically connected with the battery module; and the transformer is electrically connected with the energy storage converter and is used for being electrically connected with an input end of a station transformer of the photovoltaic power station, and the transformer is used for realizing bidirectional energy transfer between the battery module and the photovoltaic power station. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the admitting ability of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
Description
Technical Field
The application relates to the technical field of energy storage systems, in particular to an energy storage system and an alternating current power grid.
Background
The photovoltaic energy is one of inexhaustible novel energy, and along with the rapid development of the photovoltaic power generation technology of new energy, the photovoltaic power generation market has also obtained unprecedented opportunity and development, but photovoltaic power generation and wind power generation have interstitial energy, just can not satisfy the load demand at any time, all the time for electric power system originally brings bigger challenge in this weak link of "electric power access", leads to a large amount of clean energy to be wasted.
The above information disclosed in this background section is only for enhancement of understanding of the background of the technology described herein and, therefore, certain information may be included in the background that does not form the prior art that is already known in this country to a person of ordinary skill in the art.
Disclosure of Invention
The main aim at of this application provides an energy storage system and alternating current power grid to photovoltaic system's among the solution prior art abandons the problem that the light rate is high.
According to an aspect of an embodiment of the present invention, there is provided an energy storage system including: the battery module comprises a plurality of single batteries; the energy storage converter is electrically connected with the battery module; and the transformer is electrically connected with the energy storage converter and is used for being electrically connected with an input end of a station transformer of the photovoltaic power station, and the transformer is used for realizing bidirectional energy transfer between the battery module and the photovoltaic power station.
Optionally, there are a plurality of battery modules, the plurality of battery modules connected in series constitute a battery cluster, and the energy storage converter is electrically connected to the plurality of battery clusters respectively.
Optionally, the energy storage system further includes a battery management subsystem, the battery management subsystem is electrically connected to the battery module, and the battery management subsystem is configured to monitor a charge-discharge state of the single battery.
Optionally, the battery management subsystem comprises: the battery module management units are electrically connected with the battery modules in a one-to-one correspondence manner and are used for acquiring the charge and discharge state information and receiving instructions; the battery cluster management unit is in one-to-one correspondence with the battery clusters, the battery cluster management unit corresponding to the battery clusters is electrically connected with the battery module management unit corresponding to the battery clusters, and the battery cluster management unit is used for receiving the charge and discharge state information sent by the battery module management unit and issuing the command according to the charge and discharge state information; and the battery cell management unit is electrically connected with the plurality of battery cluster management units respectively and is used for receiving the charge-discharge state information and controlling the conversion of the charge-discharge mode of the battery clusters.
Optionally, the energy storage system further includes a pre-charging circuit, the pre-charging circuit corresponds to the battery cluster one to one, and the pre-charging circuit is connected between the energy storage converter and the battery cluster.
Optionally, the pre-charge circuit comprises a pre-charge resistor and a switch, the pre-charge resistor being connected in series with the switch.
Optionally, the transformer is a dual fission transformer.
According to another aspect of the embodiment of the invention, an alternating current power grid is further provided, and the alternating current power grid comprises an energy storage system and a photovoltaic power station electrically connected with the energy storage system, wherein the energy storage system is any one of the energy storage systems.
In an embodiment of the present invention, the energy storage system includes a battery module, an energy storage converter, and a transformer, where the battery module includes a plurality of single batteries, the energy storage converter is electrically connected to the battery module, the transformer is electrically connected to the energy storage converter, the transformer is electrically connected to an input terminal of a station transformer of a photovoltaic power station, and the transformer is used to perform bidirectional energy transfer between the battery module and the photovoltaic power station. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the receiving capacity of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application. In the drawings:
FIG. 1 illustrates a schematic diagram of an energy storage system according to an embodiment of the present application;
fig. 2 shows a schematic diagram of an ac power grid according to an embodiment of the present application.
Wherein the figures include the following reference numerals:
10. a battery module; 20. an energy storage converter; 30. a transformer; 40. a battery management subsystem; 41. a battery module management unit; 42. a battery cluster management unit; 43. a cell management unit; 50. pre-charging a resistor; 60. a switch; 70. and a fuse.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It will be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present. Also, in the specification and claims, when an element is described as being "connected" to another element, the element may be "directly connected" to the other element or "connected" to the other element through a third element.
As mentioned in the background, the prior art photovoltaic systems have high rejection rates, and in order to solve the above problems, in an exemplary embodiment of the present application, an energy storage system and an ac power grid are provided.
According to an embodiment of the present application, an energy storage system is provided.
Fig. 1 is a schematic diagram of an energy storage system according to an embodiment of the application. As shown in fig. 1, the energy storage system includes:
a battery module 10 including a plurality of unit batteries;
an energy storage converter 20 electrically connected to the battery module 10;
and a transformer 30 electrically connected to the energy storage converter 20 and electrically connected to an input terminal of a station transformer of a photovoltaic power station, wherein the transformer 30 is configured to perform bidirectional energy transfer between the battery module 10 and the photovoltaic power station.
Among the above-mentioned energy storage system, including battery module, energy storage converter and transformer, above-mentioned battery module includes a plurality of battery cells, and above-mentioned energy storage converter is connected with above-mentioned battery module electricity, and above-mentioned transformer is connected with above-mentioned energy storage converter electricity, and above-mentioned transformer is used for being connected with photovoltaic power plant's station with the input electricity of becoming, and above-mentioned transformer is used for making above-mentioned battery module and above-mentioned photovoltaic power plant between carry out two-way energy transfer. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the receiving capacity of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
It should be noted that the energy storage converter can be a PCS equipment container, the PCS equipment container comprises a 500KW PCS power conversion module, a ventilation air conditioner and an in-situ monitoring device, the energy storage converter serves as an interface between an energy storage system and a photovoltaic power station, electric energy of the photovoltaic power station is rectified and stored in a battery module, the stored energy of the battery module is inverted into alternating current to be sent to the photovoltaic power station, and the ventilation air conditioner and the in-situ monitoring device are used for ensuring that the PCS power conversion module works normally.
It should be further noted that, as shown in fig. 2, the transformer is a 35KV american-type box transformer, the energy storage converter is connected to a double-split transformer through an ac bus, and is connected to a station for grid connection with a 35KV input terminal by using a high-voltage cold-shrink type cable accessory after being boosted by the transformer, and the device in the left dotted line frame in fig. 2 is the energy storage converter.
In an embodiment of the present application, the battery modules are connected in series to form a battery cluster, and the energy storage converter is electrically connected to the battery clusters. Specifically, a plurality of the battery modules connected in series form a battery cluster so as to perform charge and discharge management uniformly, for example, 6 3.2V/304Ah single batteries are connected in series to form 1 304Ah/19.2V battery module, 30 battery modules are connected in series to form 1 576V/304Ah battery cluster, and 3 clusters of batteries are connected in parallel to 1 energy storage converter through a power distribution unit.
In an embodiment of the present application, as shown in fig. 1, the energy storage system further includes a battery management subsystem 40, the battery management subsystem 40 is electrically connected to the battery module 10, and the battery management subsystem 40 is configured to monitor a charge/discharge state of the single battery. Specifically, the battery management subsystem can realize charge and discharge management of the battery system, tracking of network side load power, emergency standby in an accident, control of charge and discharge power of the energy storage system, control of network side voltage in a normal operation mode and the like.
It should be noted that the energy storage coordination control system adjusts the charge-discharge state of the energy storage system in real time according to the power grid operation condition and the output condition of the photovoltaic system, so as to achieve the purpose of coordination optimization control, realize the optimal balance between the output of the energy storage system and the photovoltaic output, and simultaneously, monitor the capacity state of the energy storage battery, the photovoltaic output and the load condition in real time, and reasonably arrange the charge-discharge of the energy storage system; when the photovoltaic power station is in a full-load state, the energy storage system is utilized to rapidly absorb or release energy, the voltage fluctuation of the photovoltaic grid-connected power generation is smoothed, the balance level of active power and reactive power of the system is improved, and the stability is enhanced; when the photovoltaic power station is in a limited-power state, the energy storage system is utilized to improve the scheduling performance of photovoltaic power generation, the condition of photovoltaic light abandonment and the power grid absorption capacity are fully utilized, energy storage and economic scheduling in the power station are actively made, the energy storage system is utilized to realize translation of the photovoltaic power generation on a time coordinate, so that the photovoltaic power generation participates in power peak regulation, the system operation economy is optimized, and better economic benefit is obtained; when a photovoltaic power station or a power grid fails, the variable input end interval circuit breaker is switched on and off through the control station, the energy storage system is started to provide load for power utilization of the station through the transformer for the station, the load can be used as a quick accident standby of the system, and the power supply can also be used as a black start ignition power supply; when the energy storage system is in grid-connected operation, the charging process of the battery module can be divided into four stages of pre-charging, quick charging, uniform charging and floating charging, the discharging multiplying power can be fixedly set in advance or controlled in real time from a monitoring system, the active power and the reactive power can be independently controlled according to four quadrants respectively, and various operation modes are met; when the energy storage system is operated in a grid-connected mode, the output power of photovoltaic power generation fluctuation intermittent energy can be stabilized, the output characteristic of the intermittent energy is changed, and the requirements of power grid dispatching and stability are met. When the energy storage system is in grid-connected operation, the energy storage system is matched with a power grid dispatching system and AGC (automatic gain control), can participate in secondary frequency modulation of a power grid, can realize static reactive power control of the power grid, can quickly output reactive power in emergency, avoids load low-voltage tripping and voltage collapse, and realizes emergency reactive power control; the energy storage converter receives an instruction of a monitoring system within a capacity range, the active power and the reactive power are quickly and continuously regulated and output, active and reactive decoupling control is realized, and the maximum power change rate of the bidirectional converter meets grid-connected standards and scheduling requirements; when external load fluctuates and the frequency of the power grid changes, the bidirectional converter fully utilizes the characteristic of high self feedback speed within the range allowed by the adjustable capacity of the bidirectional converter, changes the output power of the bidirectional converter, participates in the adjustment of the system frequency, reduces the change of the frequency of the power grid, and plays the role of frequency modulation of the energy storage station as a virtual power plant.
In an embodiment of the present application, the battery management subsystem includes a battery module management unit 41, a battery cluster management unit 42, and a battery cell management unit 43, wherein the battery module management unit 41 is electrically connected to the battery modules 10 in a one-to-one correspondence manner, and is configured to collect the charge and discharge state information and receive an instruction; the battery cluster management units 42 correspond to the battery clusters one by one, the battery cluster management unit 42 corresponding to the battery cluster is electrically connected to the battery module management unit 41 corresponding to the battery cluster, and the battery cluster management unit 42 is configured to receive the charge and discharge state information sent by the battery module management unit 41 and issue the command according to the charge and discharge state information; the cell management unit 43 is electrically connected to each of the plurality of battery cluster management units 42, and is configured to receive the charge/discharge state information and control switching of the charge/discharge mode of the battery cluster. Specifically, the battery module management unit, the battery cluster management unit and the cell management unit perform hierarchical management on the battery modules, the battery module management unit collects charge and discharge state information to judge whether the charge and discharge state information is abnormal or not, and issues an instruction to process the charge and discharge state information, for example, when the charge and discharge current difference of a plurality of single batteries is large, an equalization instruction is issued to realize equalization control.
In an embodiment of the present application, the energy storage system further includes a pre-charge circuit, the pre-charge circuit corresponds to the battery clusters one by one, and the pre-charge circuit is connected between the energy storage converter and the battery clusters. Specifically, when the battery module is in the pre-charging stage, the energy storage converter converts alternating current into direct current, and the pre-charging circuit charges the battery cluster.
In an embodiment of the present application, as shown in fig. 1, the pre-charge circuit includes a pre-charge resistor 50 and a switch 60, and the pre-charge resistor 50 is connected in series with the switch 60. Specifically, the pre-charging resistor is used for limiting the charging circuit, and the switch is used for controlling the on-off of the pre-charging circuit.
In one embodiment of the present application, as shown in fig. 1, the energy storage system further includes a fuse 70, and the fuse 70 is connected between the energy storage converter 20 and the battery cluster. The energy storage system can be prevented from short circuit, and the safety of the energy storage system is improved.
In an embodiment of the present application, the transformer is a dual-fission transformer. Specifically, the double-fission transformer limits short-circuit current when the energy storage system fails, and improves the operation safety of the energy storage system.
The embodiment of the application also provides an alternating current power grid, which comprises an energy storage system and a photovoltaic power station electrically connected with the energy storage system, wherein the energy storage system is any one of the energy storage systems.
Among the above-mentioned alternating current electric wire netting, including energy storage system and the photovoltaic power station of being connected with above-mentioned energy storage system electricity, energy storage system includes the battery module, energy storage converter and transformer, above-mentioned battery module includes a plurality of battery cells, above-mentioned energy storage converter is connected with above-mentioned battery module electricity, above-mentioned transformer is connected with above-mentioned energy storage converter electricity, and above-mentioned transformer is used for the station with photovoltaic power station to become the input electricity to be connected, above-mentioned transformer is used for making and carries out two-way energy transfer between above-mentioned battery module and the. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the receiving capacity of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
From the above description, it can be seen that the above-described embodiments of the present application achieve the following technical effects:
1) among the energy storage system of this application, including battery module, energy storage converter and transformer, above-mentioned battery module is including a plurality of battery cells, and above-mentioned energy storage converter is connected with above-mentioned battery module electricity, and above-mentioned transformer is connected with above-mentioned energy storage converter electricity, and above-mentioned transformer is used for and photovoltaic power plant's station is connected with the input electricity of becoming, and above-mentioned transformer is used for making and carries out two-way energy transfer between above-mentioned battery module and the above-mentioned photovoltaic power plant. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the receiving capacity of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
2) In the alternating current power grid of this application, alternating current power grid, including energy storage system and the photovoltaic power station of being connected with above-mentioned energy storage system electricity, energy storage system includes the battery module, energy storage converter and transformer, above-mentioned battery module, including a plurality of battery cells, above-mentioned energy storage converter is connected with above-mentioned battery module electricity, above-mentioned transformer is connected with above-mentioned energy storage converter electricity, and above-mentioned transformer is used for the station with photovoltaic power station to become the input electricity and is connected, above-mentioned transformer is used for making and carries out two-way energy transfer between above-mentioned battery module and the above-mentioned photovoltaic. The energy storage system is connected to the power grid through the input end of the station transformer, bidirectional energy transfer between the battery module and the alternating current power grid is achieved, the receiving capacity of the power grid to the photovoltaic power station is improved, the problem that the light abandoning rate of the photovoltaic system is high in the prior art is solved, and the energy storage system can also provide a black start power supply or a standby power supply for the power station.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (8)
1. An energy storage system, comprising:
the battery module comprises a plurality of single batteries;
the energy storage converter is electrically connected with the battery module;
and the transformer is electrically connected with the energy storage converter and is used for being electrically connected with an input end of a station transformer of the photovoltaic power station, and the transformer is used for realizing bidirectional energy transfer between the battery module and the photovoltaic power station.
2. The system of claim 1, wherein the battery module comprises a plurality of battery modules, a plurality of battery modules connected in series form a battery cluster, and the energy storage converter is electrically connected to each of the plurality of battery clusters.
3. The system of claim 2, wherein the energy storage system further comprises a battery management subsystem, the battery management subsystem is electrically connected to the battery module, and the battery management subsystem is configured to monitor the charge and discharge states of the cells.
4. The system of claim 3, wherein the battery management subsystem comprises:
the battery module management units are electrically connected with the battery modules in a one-to-one correspondence manner and are used for acquiring the charge and discharge state information and receiving instructions;
the battery cluster management unit is in one-to-one correspondence with the battery clusters, the battery cluster management unit corresponding to the battery clusters is electrically connected with the battery module management unit corresponding to the battery clusters, and the battery cluster management unit is used for receiving the charge and discharge state information sent by the battery module management unit and issuing the command according to the charge and discharge state information;
and the battery cell management unit is electrically connected with the plurality of battery cluster management units respectively and is used for receiving the charge-discharge state information and controlling the conversion of the charge-discharge mode of the battery clusters.
5. The system of claim 2, wherein the energy storage system further comprises a pre-charging circuit, the pre-charging circuit is in one-to-one correspondence with the battery clusters, and the pre-charging circuit is connected between the energy storage converter and the battery clusters.
6. The system of claim 5, wherein the pre-charge circuit comprises a pre-charge resistor and a switch, the pre-charge resistor connected in series with the switch.
7. The system of claim 1, wherein the transformer is a dual fission transformer.
8. An alternating current power grid comprising an energy storage system and a photovoltaic power plant electrically connected to the energy storage system, the energy storage system being as claimed in any one of claims 1 to 7.
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| CN202110342313.5A CN112994062A (en) | 2021-03-30 | 2021-03-30 | Energy storage system and alternating current power grid |
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| CN202110342313.5A CN112994062A (en) | 2021-03-30 | 2021-03-30 | Energy storage system and alternating current power grid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117937634A (en) * | 2024-03-22 | 2024-04-26 | 福建时代星云科技有限公司 | Method and terminal for reducing photovoltaic light rejection rate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117937634A (en) * | 2024-03-22 | 2024-04-26 | 福建时代星云科技有限公司 | Method and terminal for reducing photovoltaic light rejection rate |
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