Cold storage cooling system of energy storage power station

Abstract

The embodiment of the utility model provides a cold storage cooling system of an energy storage power station, and belongs to the field of liquid cooling systems. The cold storage cooling system of the energy storage power station comprises a refrigerating system and a cooling system, the refrigerating system comprises a screw type cooling-water machine, a plate heat exchanger and a cross-flow cooling tower, the screw type cooling-water machine is connected with the plate heat exchanger in series and communicated with the cross-flow cooling tower through a first pipeline, the plate heat exchanger is communicated with the cross-flow cooling tower through a second pipeline, and the refrigerating system prepares cooling water through electricity price in the low ebb period; the cold storage system comprises a cold storage tank, a water inlet of the cold storage tank is communicated with the screw type water chiller through a third pipeline and is communicated with the plate heat exchanger through a fourth pipeline, a water outlet of the cold storage tank is communicated with the energy storage battery cabin, and the cold storage tank is used for storing cooling water prepared by the refrigerating system and releasing cold when the energy storage battery cabin is charged and discharged. According to the refrigerating system, cooling water is prepared through flexible application of valley electricity, the system operation cost is reduced, the cooling water is stored in the cold storage tank, cold release is conducted during charging and discharging of the energy storage battery cabin, and then the energy-saving effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid cooling systems, in particular to a cold storage cooling system of an energy storage power station. Background Art

[0002] Energy storage batteries will continue to generate heat during operation, and cooling is an important factor affecting the safety of energy storage power stations. At present, there are two mainstream thermal management methods for lithium battery units, air cooling and liquid cooling. Air cooling and liquid cooling each have their own characteristics. Compared with liquid cooling, liquid cooling and air cooling have the inherent characteristics of large heat load, low flow resistance, and high heat exchange efficiency. They are widely used in places where the battery pack has high energy density, fast charging and discharging speed, and large changes in ambient temperature.

[0003] Although the air cooling system has the advantages of small initial investment, low maintenance cost and easy maintenance, it is more suitable for small civilian or commercial battery thermal management. Liquid cooling has gradually become the mainstream battery cooling method in large-capacity and high-energy-ratio fields such as large ground power stations. Liquid cooling systems can take away heat better than air cooling systems.

[0004] The single liquid cooling solution is the solution with the most application cases and the highest market share. The system is simple and flexible in operation, but it has some defects, mainly: high operating costs, and the inability to flexibly use valley electricity, resulting in a waste of resources. Utility Model Content

[0005] The purpose of the embodiment of the utility model is to provide a cold storage cooling system for an energy storage power station, which reduces the system operation cost and achieves energy saving effect by flexibly utilizing valley electricity to prepare cooling water.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the utility model provides a cold storage cooling system of an energy storage power station, comprising: a refrigeration system, the refrigeration system comprising a refrigeration system, the refrigeration system comprising a screw chiller, a plate heat exchanger, and a cross-flow cooling tower, wherein the screw chiller is connected to the plate heat exchanger through a first double pipe, and is connected to the cross-flow cooling tower through a second double pipe, the plate heat exchanger is connected to the cross-flow cooling tower through a first double pipe, and the refrigeration system is used to prepare cooling water using the electricity price during the off-peak period; and

[0007] A cold storage system, the cold storage system includes a cold storage tank, wherein the water inlet of the cold storage tank is connected to the water outlet pipeline of the screw chiller, the water outlet of the cold storage tank is connected to the energy storage battery compartment, the water outlet of the battery compartment is connected to the screw chiller, the cold storage tank is used to store cooling water prepared by the refrigeration system and release cool water when the energy storage battery compartment is charged and discharged.

[0008] Optionally, the refrigeration system includes multiple sets of screw chillers and plate heat exchangers connected in series.

[0009] Optionally, the screw chiller includes an evaporator and a condenser, wherein a water outlet of the evaporator is connected to the cold storage tank, and a water outlet of the condenser is connected to the cross-flow cooling tower.

[0010] Optionally, the refrigeration system also includes: a refrigeration circulation water pump and a cooling circulation water pump, which are arranged at the water inlet ends on both sides of the screw chiller and the plate heat exchanger, the refrigeration circulation water pump is used to transfer the return water in the cold storage tank to the evaporator or the plate heat exchanger for cooling the return water of the cold storage tank, and the cooling circulation water pump is used to transfer the cooling water after the cooling tower is cooled to the condenser for heating and then transferred to the cross flow cooling tower.

[0011] Optionally, the energy storage power station cold storage cooling system also includes a water processor, which is arranged between the cross-flow cooling tower and the cooling circulation water pump, and is used to filter and remove dirt from the cooling water after the cross-flow cooling tower is cooled, and then transmit it to the condenser through the cooling circulation water pump.

[0012] Optionally, the energy storage power station cold storage cooling system also includes a decontaminator, which is arranged between the energy storage battery compartment and the screw chiller, and is used to decontaminate the return water flowing out of the energy storage battery compartment when it enters the refrigeration system for cooling.

[0013] Optionally, the cold storage and cooling system of the energy storage power station further includes a water replenishment system connected to the water replenishment port of the cold storage tank for replenishing water to the cold storage and cooling system of the energy storage power station.

[0014] Through the above technical solution, the refrigeration system flexibly uses valley electricity to prepare cooling water, reducing the system operating costs. In addition, by storing the cooling water in a cold storage tank and releasing the cold when the energy storage battery compartment is charged and discharged, energy saving is achieved.

[0015] The liquid cooling system is easy to install on site, takes up little space, and does not need to worry about dust, condensation, etc. In the event of a thermal runaway precursor, liquid cooling can rely on a large flow of cooling medium to force the battery compartment to dissipate heat, which can quickly suppress the continued deterioration of thermal runaway, reduce the risk of runaway, and is more conducive to the temperature control of the entire system, resulting in considerable energy-saving effects.

[0016] Other features and advantages of the embodiments of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the embodiments of the present utility model and constitute a part of the specification. Together with the following specific implementations, they are used to explain the embodiments of the present utility model, but do not constitute a limitation on the embodiments of the present utility model. In the accompanying drawings:

[0018] Figure 1It is a structural schematic diagram of a cold storage cooling system of an energy storage power station provided by an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of a refrigeration system structure provided by an embodiment of the utility model;

[0020] Figure 3 It is a detailed structural diagram of a refrigeration system provided by an embodiment of the utility model.

[0021] Description of Reference Numerals

[0022] 10 Refrigeration System 100 Screw Chiller

[0023] 1000 evaporator 1001 condenser

[0024] 101 Plate Heat Exchanger 102 Cross Flow Cooling Tower

[0025] 103 first pipeline 104 second pipeline

[0026] 105 Refrigeration circulation water pump 106 Cooling circulation water pump

[0027] 11 Cold storage system 110 Cold storage tank

[0028] 12 Energy storage battery compartment 13 Water treatment unit

[0029] 14 Decontamination device 15 Water supply system DETAILED DESCRIPTION

[0030] The specific implementation of the embodiment of the utility model is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the embodiment of the utility model, and is not used to limit the embodiment of the utility model.

[0031] See also Figure 1 As shown, it is a structural schematic diagram of a cold storage cooling system of an energy storage power station provided by an embodiment of the utility model, including a refrigeration system 10, wherein the refrigeration system 10 includes a screw chiller 100, a plate heat exchanger 101, and a cross-flow cooling tower 102, wherein the screw chiller 100 is connected to the plate heat exchanger 101 through a first double pipe 103, and is connected to the cross-flow cooling tower 102 through a second double pipe 104, and the plate heat exchanger 101 is connected to the cross-flow cooling tower 102 through the first double pipe 103, and the refrigeration system is used to prepare cooling water using the electricity price during the off-peak period; and

[0032] The cold storage system 11 includes a cold storage tank 110, wherein the water inlet of the cold storage tank 110 is connected to the water outlet pipeline of the screw chiller 100, the water outlet of the cold storage tank 110 is connected to the energy storage battery compartment 12, and the water outlet of the energy storage battery compartment 12 is connected to the screw chiller 100. The cold storage tank 110 is used to store the cooling water prepared by the refrigeration system 10 and release the cooling water when the energy storage battery compartment 12 is charged and discharged.

[0033] In some embodiments, the refrigeration system 10 uses the lower electricity prices during off-peak hours to prepare cooling water for cooling the energy storage battery compartment 12, and stores it in the cold storage tank 110. When the energy storage battery compartment 12 is charged and discharged, the cold is released through the cold storage tank, and the cooling water is transported through the factory cooling network to provide a cold source for the battery compartment. The screw chiller 100 is used for low-load operation in normal standby conditions. The refrigeration system 10 has three cooling operation modes: normal cooling, pre-cooling, and energy-saving mode (complete free cooling).

[0034] (1) When the outdoor wet-bulb temperature t>15℃ (adjustable), the cooling tower outlet water temperature tCWG>20℃, the screw chiller 100 works, the plate heat exchanger 101 does not work, and the refrigeration system 10 is in normal refrigeration mode.

[0035] (2) When the outdoor wet-bulb temperature is 7°C<t≤15°C (adjustable), the cross-flow cooling tower 102 realizes an outlet water temperature of 13°C<tCWG≤20°C, the screw chiller 100 works, the plate heat exchanger 101 works, and the refrigeration system 10 enters the pre-cooling mode.

[0036] (3) When the outdoor wet-bulb temperature t≤7°C (adjustable), the cross-flow cooling tower 102 achieves an outlet water temperature tCWG≤13°C, the screw chiller 100 stops working, the plate heat exchanger 101 starts working, and the system enters a completely free cooling mode.

[0037] By making full use of the low electricity price, natural cooling in winter and cooling in transitional seasons, the energy efficiency of the cold storage cooling system of the energy storage power station can be improved and the operating costs can be reduced.

[0038] See also Figure 2 As shown, the refrigeration system includes a plurality of sets of screw chillers 100 and plate heat exchangers 101 connected in series, which are connected to the cross-flow cooling tower 102 through a first double pipeline 103 and a second pipeline 104 respectively.

[0039] It should be noted that the number of the screw chillers 100 and the plate heat exchangers 101 can be set according to specific application scenarios and is not limited here.

[0040] It should be understood that when there are multiple screw chillers 100 and plate heat exchangers 101, the control logic of the refrigeration system 10 is as follows: after the refrigeration system 10 receives the start-up command, it first turns on a group of system circulation pumps, and then starts the corresponding screw chiller 100; when the set temperature cannot be reached after all the systems of a group of chillers are turned on, the second group of system circulation pumps is turned on, and then the second screw chiller 100 is started; and so on until the set temperature is reached. When the load decreases, the operation of the screw chiller 100 and the circulation pump is gradually stopped in groups, and the cumulative operating time of each group is consistent. The control logic of the cold storage system 11 is as follows: after the cold storage system 11 receives the cold storage command, all three hosts are running at full load, and the corresponding electric valves are operated in accordance with the cold storage mode, and cold storage is performed under the premise of meeting the cooling requirements of the energy storage battery compartment 12, until the temperature of the cold storage tank 110 meets the cold storage requirements, and the cold storage stage ends. It can realize fully automatic operation control of the cold and hot source systems (unmanned machine room, the control system automatically starts / stops according to preset conditions, adjusts the number of units, water volume, temperature, etc.), and switching between semi-automatic operation and manual operation modes.

[0041] See also Figure 3 As shown, the screw chiller 100 includes an evaporator 1000 and a condenser 1001 , wherein a water outlet of the evaporator 1000 is connected to the cold storage tank 110 , and a water outlet of the condenser 1001 is connected to the cross-flow cooling tower 102 .

[0042] In some embodiments, see Figure 3 As shown, the refrigeration system 10 also includes a refrigeration circulation water pump 105 and a cooling circulation water pump 106, which are arranged at the water inlet ends on both sides of the screw chiller 100 and the plate heat exchanger 101. The refrigeration circulation water pump 105 is used to transfer the return water in the cold storage tank 110 to the evaporator 1000 for cooling the return water of the cold storage tank 110, and the cooling circulation water pump 106 is used to transfer the cooling water after the cross flow cooling tower 102 is cooled to the condenser 1001 for heating and then transferred to the cross flow cooling tower 102.

[0043] In some embodiments, the operating percentage of the flow rate of the refrigeration circulation water pump 105 is calculated according to the change in the terminal load of the air-conditioning system, and the change in the temperature difference between the inlet and outlet water of the chiller is compared, so as to realize the mutual reference of multiple parameters to automatically control the operating frequencies of the refrigeration circulation water pump 105 and the cooling circulation water pump 106, save the energy consumption of hydraulic transmission, and ensure that the supply and return water temperature difference is not greater than the design value.

[0044] In some embodiments, the refrigeration system 10 adopts a double-pipe closed system. In order to better match the air-conditioning working conditions, cold storage working conditions, load changes and energy-saving operation of the unit, the corresponding refrigeration circulation water pump 105 and cooling circulation water pump 106 are both frequency-controlled, and the screw chiller 100, refrigeration circulation water pump 105 and cooling circulation water pump 106 are started and stopped in sequence according to load requirements.

[0045] In some embodiments, the screw chiller 100 has a cooling condition as follows: the system return water is pumped into the evaporator 1000 of the screw chiller 100 by a chilled water circulation pump, and enters the water supply main after the evaporator 1000 is cooled to 15°C. The main cold water is transported to the energy storage battery compartment 12 through the cooling pipe network, and the cold water heated to 20°C by heat exchange in the battery compartment re-enters the evaporator of the screw chiller 100 through the plant return pipe network. Cold storage working condition of screw chiller 100: the return water from cold storage tank 110 is pumped into evaporator 1000 of screw chiller 100 by refrigeration circulation water pump 105, and enters into cold water supply main after cooling down 7℃ in evaporator 1000, the cold water flows through lower water distributor of cold storage tank 110 for water distribution and cold storage, the high temperature cold water of 20℃ in upper water distributor of cold storage tank 110 is pressurized by cold water circulation pump and enters into evaporator 1000 of screw chiller 100, the cold storage working condition and cooling supply working condition are automatically switched by electric valve.

[0046] In some embodiments, the plate heat exchanger 101 and the screw chiller 100 form a series system. In the free cooling condition in winter, the screw chiller 100 is bypassed, and the plant return water is pressurized by the chilled water circulation pump 105 and enters the plate heat exchanger 101. After heat exchange in the plate heat exchanger 101, the low-temperature cold water is transported to the energy storage battery compartment 12 through the plant water supply network; in the transitional season energy mode, the screw chiller 100 and the plate heat exchanger 101 form a series system, and the plant cold return water is pressurized by the chilled water circulation pump 105 and first enters the plate heat exchanger 101 for pre-cooling, and then enters the screw chiller 100 to cool to the target temperature, and is transported to the energy storage battery compartment 12 through the plant water supply network.

[0047] In some embodiments, the main equipment of the cold storage cooling system of the energy storage power station is shown in Table 1:

[0048] Table 1 List of main equipment

[0049]

[0050]

[0051] In some embodiments, see Figure 3As shown, the energy storage power station cold storage cooling system also includes a water processor 13, which is arranged between the cross-flow cooling tower 102 and the cooling circulation water pump 106, and is used to filter and remove pollutants from the cooling water after the cross-flow cooling tower 102 is cooled, and then transmit it to the condenser through the cooling circulation water pump 106.

[0052] In some embodiments, see Figure 3 As shown, the energy storage power station cold storage cooling system also includes a decontaminator 14, which is arranged between the energy storage battery compartment 12 and the screw chiller 100, and is used to decontaminate the return water flowing out of the energy storage battery compartment 12 when entering the refrigeration system 10 for cooling.

[0053] In some embodiments, see Figure 3 As shown, the cold storage cooling system of the energy storage power station also includes a water replenishment system 15, which is connected to the water replenishment port of the cold storage tank 110 and is used to replenish water to the cold storage cooling system of the energy storage power station.

[0054] Specifically, the raw water in the water supply pipeline is first softened by a softening water device, enters the water supply pump for pressurization, and then is replenished to the circulating water pump inlet main pipe of the system water supply point. The system constant pressure value is 0.12MPa.

[0055] In some embodiments, the refrigeration system 10 has a total installed capacity of 1440RT and a cold storage capacity of 2952RTH. The inlet and outlet water temperatures of the system are shown in Table 2:

[0056] Table 2 Inlet and outlet water temperature

[0057] project Cold water parameters Designed supply and return water temperature (℃) 15 / 20 Cold storage condition chiller inlet and outlet water temperature (℃) 7 / 14 Plate heat exchanger outlet water temperature (℃) 15 / 20 Cold storage tank inlet and outlet water temperature (℃) 7 / 20

[0058] In some implementations, a radial power supply is adopted, and the metering is unified at the low-voltage distribution cabinet behind the transformer. A multifunctional metering instrument with a remote transmission function should be installed at the switch of the low-voltage distribution cabinet. The grounding form of the low-voltage distribution system adopts the TN-S system. The PE line and the N line should be strictly separated. The grounding electrodes of the metal casings of all electrical equipment that are not energized under normal circumstances but present voltage after the insulation is damaged are required to be reliably connected to the protective conductor. A local equipotential terminal box is set up in the refrigeration room, which is reliably connected to the reserved grounding terminal of the building. The grounding system is set up using the local equipotential terminal box, and galvanized flat steel is used to reliably connect to the housing of the distribution equipment, the basic channel steel of the distribution cabinet, the protection trunk line, the metal base of the water pump, the electric valve, the metal main pipe for the equipment to enter and exit the household, the metal components of the building, etc. The grounding resistance is not greater than 1Ω. All socket circuits are equipped with a 30mA leakage protection device. For the ground fault protection of the TN system distribution line with a nominal voltage of 220V between the phase conductors, the time to cut off the fault circuit should meet the following requirements: for the distribution line or the terminal line that only supplies electricity to fixed electrical equipment, it should not exceed 5s; for the terminal line or socket circuit that supplies electricity to handheld electrical equipment or mobile electrical equipment, it should not exceed 0.4s. To prevent lightning surge intrusion, a surge protector of level I test should be installed at the entrance and exit of the cable to the building.

[0059] In some embodiments, a highly reliable PLC control system is used to automatically control the air conditioning system, realizing functions such as fully automatic operation control of the cold source room system (unattended room, the control system automatically starts / stops according to preset conditions, adjusts the number of units, water volume, temperature, etc.), semi-automatic control (automatically adjusts the unit load, water volume, temperature, but does not automatically increase / decrease the number of units in operation) and manual operation control, and also includes an accuracy verification system and expert system to ensure monitoring and evaluation, a historical record system, etc.

[0060] In some embodiments, a safety protection system is also provided to communicate directly with the screw chiller 100 to read the status data of the screw chiller 100, such as temperature, pressure, current and other conventional parameters of the screw chiller 100. At the same time, the following control parameters can be read: surge point (to ensure the safety of the unit), oil tank oil pump pressure (to determine whether maintenance is required), refrigerant liquid level, condenser saturation (as a reference point for cooling water circulation), compressor operating conditions (compressor operating current percentage, directly involved in addition and subtraction machine control, to achieve truly safe energy saving) and so on. By referring to these data, the control program of the entire system can be further improved, making the operation of the screw chiller 100 safer and the system more reliable.

[0061] The screw chiller 100 is controlled by "soft start" and "soft shutdown". When loading the screw chiller 100, the system will first reduce the load of the currently running screw chiller 100, then start the next screw chiller 100, and then increase the load of multiple running screw chillers 100 at the same time; when unloading the screw chiller 100, first reduce the load of multiple running screw chillers 100, then stop one screw chiller 100, and finally increase the load of the currently running screw chiller 100. "Soft start" and "soft shutdown" can avoid the huge impact on the power grid when the screw chiller 100 is started and stopped, ensure the safety of the screw chiller 100 and the power distribution station, and at the same time, enable the screw chiller 100 to enter the optimal operating condition more quickly.

[0062] The system is equipped with an equal-time operation function module, which automatically records the cumulative operation time of each screw chiller 100, water pump, and fan. When adding a machine, the device with the shortest operation time is started first, and when reducing a machine, the device with the longest operation time is stopped first, so that the equipment can run at a relatively equal time, avoiding a significant reduction in the service life of the equipment due to the continuous operation of a certain equipment. Balancing the operation time of each device can extend the service life of the equipment as a whole.

[0063] In some embodiments, the fully automatic operation mode realizes the following functions without limitation: automatically starts and stops the air-conditioning room system to realize the unmanned room function, can automatically start and stop the screw chiller 100 for cooling according to preset conditions (schedule or environmental conditions), automatically supplies cooling according to the terminal load, dynamically adjusts the number and frequency of operation of the screw chiller 100 and its ancillary equipment, automatically shields operating equipment failures and starts backup equipment, and realizes a fully automatic control process with the goal of optimizing the comprehensive operating efficiency of the room. At the same time, it automatically balances the priority operation of each unit according to the accumulated operating time (effective for units with the same power) and automatically evaluates the comprehensive operating EER value of the room.

[0064] The semi-automatic operation mode realizes the following functions without limitation: except that the number of running equipment (equipment in Table 1) is not automatically increased or decreased, all functions are the same as the fully automatic mode. It can realize interlocking control of the screw chiller 100, water pump, valve, etc. in a single unit, adjust the operating frequency of the water pump, and ensure that the single unit operates at the best efficiency condition in each load section. Real-time collection of dynamic operating data of the screw chiller 100, inverter, network meter, etc., to conduct comprehensive efficiency evaluation of the single unit.

[0065] The manual operation mode can realize manual start and stop of the screw chiller 100, water pump, valve, etc. in the system through the strong power professional control box (cabinet). The group control cabinet collects the dynamic operation data of the screw chiller 100, inverter, network meter, etc. in real time to evaluate the efficiency of a single device.

[0066] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A cold storage cooling system for an energy storage power station, characterized in that: include: A refrigeration system, the refrigeration system comprising a screw chiller, a plate heat exchanger, and a cross-flow cooling tower, wherein the screw chiller is connected to the plate heat exchanger through a first double pipe, and is connected to the cross-flow cooling tower through a second double pipe, the plate heat exchanger is connected to the cross-flow cooling tower through a first double pipe, and the refrigeration system is used to prepare cooling water using off-peak electricity prices; and A cold storage system, the cold storage system comprising a cold storage tank, wherein the water inlet of the cold storage tank is connected to the water outlet pipeline of the screw chiller, the water outlet of the cold storage tank is connected to the energy storage battery compartment, the water outlet of the energy storage battery compartment is connected to the screw chiller, the cold storage tank is used to store cooling water prepared by the refrigeration system and release cool water when the energy storage battery compartment is charged and discharged.

2. The cold storage cooling system of the energy storage power station according to claim 1, characterized in that: The refrigeration system comprises a plurality of sets of screw chillers and plate heat exchangers connected in series.

3. The cold storage cooling system of the energy storage power station according to claim 1, characterized in that: The screw chiller includes an evaporator and a condenser, wherein a water outlet of the evaporator is communicated with the cold storage tank, and a water outlet of the condenser is communicated with the cross-flow cooling tower.

4. The cold storage cooling system of the energy storage power station according to claim 3, characterized in that: The refrigeration system also includes: a refrigeration circulation water pump and a cooling circulation water pump, which are arranged at the water inlet ends on both sides of the screw chiller and the plate heat exchanger. The refrigeration circulation water pump is used to transfer the return water in the cold storage tank to the evaporator for cooling the return water of the cold storage tank, and the cooling circulation water pump is used to transfer the cooling water after the cross-flow cooling tower is cooled to the condenser for heating and then transferred to the cross-flow cooling tower.

5. The cold storage cooling system of the energy storage power station according to claim 4, characterized in that: The energy storage power station cold storage cooling system also includes a water processor, which is arranged between the cross-flow cooling tower and the cooling circulation water pump, and is used to filter and remove dirt from the cooling water after the cross-flow cooling tower is cooled, and then transmit it to the condenser through the cooling circulation water pump.

6. The cold storage cooling system of the energy storage power station according to claim 1, characterized in that: The energy storage power station cold storage cooling system also includes a decontaminator, which is arranged between the energy storage battery compartment and the screw chiller, and is used to decontaminate the return water flowing out of the energy storage battery compartment when it enters the refrigeration system for cooling.

7. The cold storage cooling system of the energy storage power station according to claim 1, characterized in that: The cold storage cooling system of the energy storage power station also includes a water replenishment system connected to the water replenishment port of the cold storage tank for replenishing water to the cold storage cooling system of the energy storage power station.

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