CN117498414A - System for realizing electricity saving and cost reduction of communication base station by combining photovoltaic and energy storage - Google Patents
System for realizing electricity saving and cost reduction of communication base station by combining photovoltaic and energy storage Download PDFInfo
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- CN117498414A CN117498414A CN202311539390.5A CN202311539390A CN117498414A CN 117498414 A CN117498414 A CN 117498414A CN 202311539390 A CN202311539390 A CN 202311539390A CN 117498414 A CN117498414 A CN 117498414A
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- 238000004146 energy storage Methods 0.000 title claims abstract description 85
- 230000005611 electricity Effects 0.000 title claims abstract description 17
- 238000004891 communication Methods 0.000 title claims abstract description 16
- 238000012544 monitoring process Methods 0.000 claims abstract description 11
- 238000007599 discharging Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000010248 power generation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Classifications
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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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- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/14—Balancing the load in a network
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- 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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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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
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- 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
- H02J2203/00—Indexing scheme relating to details of circuit arrangements for AC mains or AC distribution networks
- H02J2203/10—Power transmission or distribution systems management focussing at grid-level, e.g. load flow analysis, node profile computation, meshed network optimisation, active network management or spinning reserve management
-
- 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
- H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a system for realizing electricity saving and cost reduction of a communication base station by combining photovoltaic and energy storage, which comprises a photovoltaic array, a photovoltaic DC/DC, an energy storage battery, loop switching, battery DC/DC boosting and monitoring modules, wherein the photovoltaic array is connected with the photovoltaic DC/DC, and the loop switching is connected after the photovoltaic array is output; one path of the energy storage battery is connected with the battery DC/DC to boost, and after boosting, the other path of the energy storage battery is connected with the loop switch, and the other path of the energy storage battery is directly connected with the loop switch; the loop switch is connected with a commercial power direct current row; the monitoring module controls loop switching according to a power supply priority strategy: in the peak power period, the photovoltaic and the energy storage battery are overlapped to supply power to the direct current load, in the flat power period, the photovoltaic and the mains supply are overlapped to supply power to the direct current load or the photovoltaic charges the energy storage battery and the mains supply supplies power to the direct current load, and in the valley power period, the mains supply is loaded and charges the energy storage battery; the system and the base station in-use system operate independently, and have the advantages of reducing engineering quantity, daily coordination quantity and oil engine configuration; and secondly, photovoltaic charging can be carried out between peak periods, more benefits are obtained, and thirdly, the configuration capacity of the energy storage battery is reduced, and the investment cost is reduced.
Description
Technical Field
The invention relates to a power supply system of a communication base station, in particular to a power supply system for realizing power saving and cost reduction of the communication base station by combining photovoltaics with energy storage.
Background
The problem that the power consumption of the 5G communication base station is large is increasingly prominent throughout the country, and energy conservation and cost reduction are increasingly important for telecom operators. The photovoltaic power generation can be used for saving electricity of the communication base station, but is limited by the area, the number of photovoltaic panels installed on the site of the communication base station is not large, and the power supply capacity is not enough; the battery energy storage available peak Gu Jiacha is beneficial to reducing the cost, but the price of a lithium battery is higher, and the battery capacity is very large when the battery is discharged in the whole peak period, so that the cost is high and the recovery period is long. In addition, the communication base station in use has a complete power supply system and effective maintenance rules, and if a new energy-saving and cost-reducing system is added, the system in use can be interfered, the original maintenance rules can be broken, so that a plurality of problems are encountered. In summary, the power saving and cost reducing system of the communication base station needs to solve the problems of power supply capability, economy and coordination with the in-use system.
The photovoltaic and the energy storage are matched for use, so that sufficient electric quantity can be provided, the effect is not simply to add up the benefits of saving electricity and reducing the energy storage cost of the photovoltaic, and more importantly, the photovoltaic and the energy storage battery are matched for increasing the effect of saving energy and reducing the cost, and the capacity of the energy storage battery can be reduced. The control system can control different power supplies according to the time-of-use electricity price policy and the energy-saving and cost-reducing policy, and supply power to the load and charge the energy storage battery at different times, so that the configuration capacity of the energy storage battery can be reduced to reduce the cost, and more electricity can be saved and the cost can be reduced. This is because photovoltaic power generation can bear the power consumption of a part of the load while the energy storage battery is discharged during the peak period, and thus it is not necessary to configure the energy storage battery to be discharged during the entire peak period. If the photovoltaic 0 cost is selected to supplement the energy storage battery in the flat electric period after the discharge in the first peak electric period and the high-price discharge in the second peak electric period, more benefits can be obtained, and the daily cycle utilization rate of the energy storage battery can exceed 100%.
In addition, the power supply system of the communication base station is provided with a standby battery, the standby battery has the function of supplying direct current load by emergency discharging when the commercial power is interrupted, the service time of the base station is prolonged, the power-saving and cost-reducing system is also provided with a battery, and how to coordinate the two batteries is key: firstly, a plurality of standby batteries are lead-acid batteries, the charge-discharge cycle life is relatively short, and the standby batteries are only suitable for floating standby electricity and are not suitable for daily cycle charge-discharge; secondly, the system is discharged from which battery and charged to which battery, and the simple system grid connection cannot be solved; thirdly, the monitor of the in-use power supply system is only responsible for the operation of the in-use system, and if the project of transformation and the in-use system are involved excessively, the monitoring of the in-use system can feel a plurality of alarms caused by the newly-added system, and the daily operation and maintenance can be disturbed.
Therefore, the two systems need to operate independently of each other, wherein the key is to solve the independent operation of the two sets of batteries.
Disclosure of Invention
The invention aims at solving the defects in the prior art and provides a system for realizing electricity saving and cost reduction of a communication base station by combining photovoltaics with energy storage.
The power-saving and cost-reducing system of the communication base station comprises a photovoltaic array, a photovoltaic DC/DC, an energy storage battery, a loop switching circuit, a battery DC/DC booster circuit with a reverse protection function and a monitoring module with an information acquisition and switching control function, and the system has the function of realizing the effects of less investment, energy saving and cost reduction by effectively managing the use of different power supplies.
The photovoltaic array is connected with the input end of the photovoltaic DC/DC, the output end of the photovoltaic DC/DC is connected with the loop switch, one path of the energy storage battery is connected with the battery DC/DC boosting input end, the output end of the energy storage battery is connected with the loop switch after boosting, and the other path of the energy storage battery is connected with the Direct Current (DC) of the commercial power.
The energy storage battery has the functions of utilizing peak Gu Jiacha for arbitrage, and the standby battery has the functions of emergency discharging and delayed power supply when the commercial power is cut off, and is different in functions, and the energy storage battery does not need cross-system information communication and control, and independently operates, and only a commercial power direct current row is connected with a system direct current row.
The output voltage of the battery DC/DC boosting is slightly lower than the output voltage of the photovoltaic DC/DC boosting, but is obviously higher than the output voltage of the mains supply rectifier and is higher than the voltage of the standby battery, so that different power supplies supply power to a direct current load according to the priority, and the sequence from high to low of the power supply voltage is the priority sequence of power supply: the photovoltaic array is characterized in that the photovoltaic array is an energy storage battery, a commercial power direct current row is a standby battery. Different power supplies act on the load, the high voltage outputs own current preferentially, and the low voltage can supplement the current required by the load or does not output current.
The battery DC/DC boost circuit has the function of realizing independent operation of the energy storage battery and the standby battery by forming the voltage difference between the energy storage battery and the standby battery, and when the voltage of the energy storage battery is low, the energy storage battery cannot be charged by the commercial power direct current; the standby battery has the lowest voltage, and the load cannot be discharged in a flat time, and the standby battery cannot be discharged in an emergency until other power supplies are out of service.
The circuit switching circuit enables the switch terminals 1, 2, 3 and 4 to be closed and opened in different combinations under the switching control in the monitoring module, so that different power supplies are overlapped on a load circuit to carry loads and overlapped on an energy storage battery circuit to charge the energy storage battery.
The monitoring module controls a switch in loop switching according to the time-of-use electricity price policy, the power priority use policy and the acquired information of the energy storage battery, and closes or opens different power loops according to requirements so as to complete the operation of energy conservation and cost reduction in advance: the photovoltaic array and the energy storage battery are overlapped to supply power to the direct current load in the peak period; in the flat-period, the photovoltaic array and the commercial power are superimposed to supply power to a direct-current load or the photovoltaic array charges an energy storage battery and the commercial power is supplied to the direct-current load; and in the valley period, the commercial power is loaded and charges the energy storage battery.
Drawings
Fig. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a schematic diagram of the terminal connection in the loop switch of the present invention.
Specific application modes.
The operation of the present system is described with reference to fig. 1 and 2.
Suppose that the time-of-use electricity price at a certain place is: peak power periods 9:00-12:00, 17:00-22:00, flat power periods 8:00-9:00, 12:00-17:00, 22:00-23:00, valley power periods 23:00-08:00.
1. 8:00-9:00: in the first flat period, the photovoltaic and commercial power are subjected to direct current superposition with load. See fig. 2 (a).
Photovoltaic power supply loop: in the circuit of the loop switch (4), the terminal 3 and the terminal 1 are closed, and the photovoltaic and the commercial power direct current row (7) are connected to supply power to a load.
Energy storage battery loop: meanwhile, the terminals 2 and 4 are disconnected from the terminals 1 and 3, the connection between the energy storage battery and the commercial power direct current (7) is cut off, and the connection between the energy storage battery and the photovoltaic is cut off.
The commercial power direct current loop: the utility power direct current row (7) is always connected with the load loop, photovoltaic current is preferentially used due to high voltage of the photovoltaic, and the insufficient part of current required by the load is supplied by the utility power direct current.
2. 9:00-12:00: in the first peak period, the photovoltaic and energy storage battery discharge stack is loaded. See fig. 2 (b).
Photovoltaic power supply loop: in the circuit of the loop switch (4), the terminal 3 and the terminal 1 are closed, and the photovoltaic and the commercial power direct current row (7) are connected to supply power to a load.
Energy storage battery loop: at the same time, the terminal 2 is closed with the terminal 1, the terminal 4 is disconnected with other terminals, and the energy storage battery and the commercial power direct current (7) are connected to discharge the load.
The commercial power direct current loop: the utility power direct current row (7) is always connected with the load loop, photovoltaic current is preferentially used due to high voltage of the photovoltaic power supply, the output voltage of the energy storage battery is low, the insufficient part of current required by the load is supplemented by the energy storage battery, the voltage of the utility power direct current is the lowest, and no current is basically output.
3. 12:00-17:00: and in the second flat period, the commercial power is DC with a load, and the photovoltaic charges the battery pack. See fig. 2 (d).
Photovoltaic power supply loop: in the circuit of the loop switch (4), the terminal 3 and the terminal 4 are closed and the terminal 1 is opened, so that the photovoltaic charges the energy storage battery, and the connection between the photovoltaic and the commercial power direct current (7) is disconnected.
Energy storage battery loop: at the same time of closing the terminal 4 and the terminal 3, the connection of the terminal 2 with other terminals is disconnected, and the connection of the energy storage battery with the commercial power direct current (7) is cut off.
The commercial power direct current loop: the commercial power direct current (7) is always connected with the load loop to directly supply power to the load.
4. 17:00-22:00: and in the second peak period, the photovoltaic and the energy storage battery are superposed to discharge the load. See fig. 2 (b).
Photovoltaic power supply loop: in the circuit of the loop switch (4), the terminal 3 and the terminal 1 are closed, the photovoltaic and the commercial power direct current row (7) are connected to supply power to the load, and when the sun falls into the mountain, the photovoltaic power output is 0, and all current is provided by the energy storage battery.
Energy storage battery loop: meanwhile, the terminal 2 is closed with the terminal 1, the terminal 4 is disconnected with other terminals, the energy storage battery is connected with the mains supply direct current (7) to discharge the load, and the energy storage battery independently supplies power to the load when the output of the photovoltaic power supply is 0, because the voltage of the energy storage battery is much higher than the output voltage of the mains supply rectifier.
The commercial power direct current loop: the commercial power direct current row (7) is always connected with the load loop, and photovoltaic current is preferentially used due to the high voltage of the photovoltaic power supply; the output voltage of the energy storage battery is low, and the insufficient part of the current required by the load is supplied by the energy storage battery; the voltage of the commercial power direct current is the lowest, and basically no current is output.
5. 22:00-23:00: and in the third flat period, the photovoltaic does not generate electricity, if the energy storage battery has residual electricity, the discharge and the direct current superposition of the commercial power are carried out, and the direct current of the commercial power becomes the only power supply to carry out the load after the residual electricity is discharged. See fig. 2 (b).
Photovoltaic power supply loop: in the loop switching (4) circuit, the terminal 3 and the terminal 1 are closed, and the photovoltaic output current is 0 at night, so that the photovoltaic output current is connected with the direct current bank to supply power to a load.
Energy storage battery loop: meanwhile, the terminal 2 is closed with the terminal 1, the terminal 4 is disconnected with other terminals, the energy storage battery and the commercial power direct current (7) are connected to discharge the load, and when the electric quantity of the energy storage battery is discharged, the commercial power direct current alone carries the load.
The commercial power direct current loop: the commercial power direct current row (7) is always connected with the load loop, and after the electric quantity of the battery pack is discharged, all current required by the load is supplied by commercial power direct current.
6. 23:00-08:00: in the valley period, the commercial power is charged with direct current with load, and after the battery is fully charged, the commercial power is superimposed with photovoltaic output current with load, and the photovoltaic power output is 0 at night. See fig. 2 (c) and (a).
Photovoltaic power supply loop: when the mains supply is used for charging the energy storage battery, the terminals 3 and 1 are disconnected, when the energy storage battery is full, the terminals 3 and 1 are closed, the photovoltaic is connected with the direct current bank, and the photovoltaic power generation supplies power to the load when waiting for rising of the sun.
Energy storage battery loop: in the circuit of loop switching (4), a terminal 4 is closed with a terminal 1, other terminals are disconnected, the mains supply direct current is connected to charge the energy storage battery, and when the energy storage battery is full, the terminals 1 and 4 are disconnected, and the charging of the mains supply direct current to the energy storage battery is cut off.
The commercial power direct current loop: the utility power direct current alone carries the load, and when the utility power direct current charges for energy storage battery evening, closed terminal 1 and 4 break off terminal 1 and 4 when energy storage battery is full, and the utility power direct current carries the load when charging evening, and photovoltaic and the utility power direct current stack supply power for the load after rising in the morning sun.
Claims (5)
1. A system for realizing electricity saving and cost reduction of a communication base station by combining photovoltaic and energy storage is characterized by comprising a photovoltaic array (1), a photovoltaic DC/DC (2), an energy storage battery (3), loop switching (4), battery DC/DC boosting (5) and a monitoring module (6) with information acquisition and switching control functions;
the photovoltaic array (1) is connected with the input end of the photovoltaic DC/DC (2), the output end of the photovoltaic DC/DC (2) is connected with the loop switch (4), one path of the energy storage battery (3) is connected with the input end of the battery DC/DC boost (5), the output end after the boost is connected with the loop switch (4), the other path of the energy storage battery is directly connected with the loop switch (4), and the loop switch (4) is connected with the commercial power direct current row (7);
the system operation is characterized in that a monitoring module (6) controls a switch in a loop switch (4) to close or open different power loops according to requirements according to a time-of-use electricity price policy, a power priority use policy and collected monitoring information so as to finish preset energy-saving and cost-reducing operation: the photovoltaic array (1) and the energy storage battery (3) are overlapped to supply power to the direct current load (8) in the peak period; in the flat period, the photovoltaic array (1) and the commercial power are superimposed to supply power to the direct current load (8), or the photovoltaic array (1) charges the energy storage battery (3) and the commercial power is supplied to the direct current load (8); in the valley period, the commercial power is loaded and charges the energy storage battery (3).
2. The system and the communication base station are independently operated in the power supply system, the information acquisition and the equipment control of a cross-system are not needed, and only a commercial power direct current (7) is connected with the system direct current; the standby battery (9) of the system is in charge of emergency response when the mains supply is interrupted, and the energy storage battery (3) of the system is only in charge of charging and discharging arbitrage by using the peak Gu Jiacha.
3. The battery DC/DC boost (5) boosts and controls the output voltage of the energy storage battery (3) to be slightly lower than the output voltage of the photovoltaic DC/DC (2) but higher than the voltage of the direct current row (7) of the mains supply, so that different power supplies supply power to the direct current load (8) according to the priority order, and the power supply voltage is the priority order of power supply from high to low: the photovoltaic array (1) > the energy storage battery (3) > the commercial power direct current row (7) > the standby battery (9).
4. The monitoring module (6) collects and analyzes operation information of the photovoltaic DC/DC (2) and operation data of a Battery Management System (BMS) of the energy storage battery (3), timely controls different terminals in the loop switch (4) to be closed and opened according to a time-of-use electricity price policy and an energy-saving and cost-reducing policy, and supplies power to the direct current load (8) and charges the energy storage battery (3) by using different power supply combinations.
5. Under the switching control action of the circuit switching (4) in the monitoring module (6), the switch terminals 1, 2, 3 and 4 in the circuit switching (4) are closed and opened in different combinations, so that different power supplies are overlapped on a load circuit to supply power to a load and are overlapped on a battery circuit to charge an energy storage battery (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311539390.5A CN117498414A (en) | 2023-11-17 | 2023-11-17 | System for realizing electricity saving and cost reduction of communication base station by combining photovoltaic and energy storage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311539390.5A CN117498414A (en) | 2023-11-17 | 2023-11-17 | System for realizing electricity saving and cost reduction of communication base station by combining photovoltaic and energy storage |
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| CN117498414A true CN117498414A (en) | 2024-02-02 |
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| CN202311539390.5A Pending CN117498414A (en) | 2023-11-17 | 2023-11-17 | System for realizing electricity saving and cost reduction of communication base station by combining photovoltaic and energy storage |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856314A (en) * | 2024-03-04 | 2024-04-09 | 泉州亿力电气技术设备有限公司 | Distributed energy storage management method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117856314A (en) * | 2024-03-04 | 2024-04-09 | 泉州亿力电气技术设备有限公司 | Distributed energy storage management method |
| CN117856314B (en) * | 2024-03-04 | 2024-05-14 | 泉州亿力电气技术设备有限公司 | Distributed energy storage management method |
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