Active cooling system of compressed air energy storage power station and operation method

Abstract

The invention discloses a compressed air energy storage power station active cooling system and an operation method.The compressed air energy storage power station active cooling system comprises a compressor unit, a turbine unit, a cooling loop, a heat storage loop, a first heat exchanger and a second heat exchanger, and the heat storage loop comprises a trunk, a first branch and a second branch; the first branch circuit and the second branch circuit are connected in parallel and are respectively connected in series with the trunk circuit, a first circulation loop is formed between the first branch circuit and the trunk circuit, and a second circulation loop is formed between the second branch circuit and the trunk circuit; the second heat exchanger is arranged on the first branch and provided with a third heat exchange flow channel and a fourth heat exchange flow channel, the third heat exchange flow channel communicates with the first branch, and the second heat exchange flow channel communicates with the cooling loop. According to the active cooling system of the compressed air energy storage power station, the circulation mode of the heat storage loop can be adjusted according to the environment temperature, the adaptability and energy efficiency of the system are improved, and the operation cost is reduced.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an active cooling system and an operating method for a compressed air energy storage power station. Background Art

[0002] The active cooling system of the compressed air energy storage power station stores energy through energy storage gas and releases gas to drive the turbine to generate electricity when needed, achieving efficient energy conversion and storage.

[0003] During the operation of the active cooling system of the compressed air energy storage power station, the cooling system needs to ensure that the compressed air can be fully cooled to meet the safety and efficient operation requirements of the subsequent turbine units. While ensuring the cooling of the compressed air, the cooling system also needs to fully release and effectively utilize the surplus heat energy.

[0004] In the related art, since the surplus heat energy is affected by the ambient temperature, it is difficult for the cooling system to accurately and effectively release the surplus heat energy. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide an active cooling system for a compressed air energy storage power station. According to the active cooling system for a compressed air energy storage power station of the present invention, the circulation mode of the heat storage circuit can be adjusted according to the ambient temperature, thereby improving the system adaptability and energy efficiency and reducing the operating cost.

[0006] The present invention also proposes an operating method for the active cooling system of the compressed air energy storage power station.

[0007] The active cooling system of the compressed air energy storage power station according to the present invention comprises: a compressor unit and a turbine unit, wherein a gas flow channel is provided between the compressor unit and the turbine unit; a cooling circuit, wherein a circulating cooling medium is provided in the cooling circuit, wherein the cooling circuit is connected to the compressor unit and the turbine unit; a heat storage circuit, wherein a circulating heat storage medium is provided in the heat storage circuit, wherein the heat storage circuit comprises a trunk, a first branch and a second branch, wherein the first branch and the second branch are connected in parallel to each other and are respectively connected in series to the trunk, and a heat storage medium is formed between the first branch and the trunk. A first circulation loop is formed, and a second circulation loop is formed between the second branch and the main line; a first heat exchanger, the first heat exchanger is arranged on the main line, the first heat exchanger is provided with a first heat exchange channel and a second heat exchange channel, the first heat exchange channel is connected to the main line, and the second heat exchange channel is connected to the gas channel; a second heat exchanger, the second heat exchanger is arranged on the first branch, the second heat exchanger is provided with a third heat exchange channel and a fourth heat exchange channel, the third heat exchange channel is connected to the first branch, and the second heat exchange channel is connected to the cooling circuit.

[0008] According to the active cooling system of the compressed air energy storage power station of the present invention, a first circulation loop is formed between the first branch and the main road, and a second circulation loop is formed between the second branch and the main road, so that the heat storage loop can flexibly select the circulation mode according to different working conditions and requirements. By arranging the second heat exchanger on the first branch, the heat storage medium of the heat storage loop can effectively exchange heat with the cooling medium in the circulation mode of starting the first circulation loop, so as to reduce the temperature of the heat storage medium in the heat storage loop, so as to meet the heat storage medium in the charging stage. The heat storage medium can effectively absorb the heat of the energy storage gas. According to the influence of the ambient temperature on the surplus heat energy, it is possible to flexibly choose to start the first circulation loop or the second circulation loop. Specifically, when the ambient temperature is high, the system is more likely to accumulate surplus heat energy, resulting in an increase in the temperature of the heat storage medium. At this time, starting the first circulation loop and cooling the heat storage medium with the cooling medium through the second heat exchanger can effectively reduce its temperature and prepare for the next charging stage. When the ambient temperature is low, the system accumulates relatively little surplus heat energy, and the temperature of the heat storage medium is maintained at a low level. At this time, the second circulation loop is started, which can meet the needs of the charging stage without relying on the cooling medium for additional cooling, and the cost is lower. Therefore, the active cooling system of the compressed air energy storage power station can better adapt to various complex working conditions and reduce energy consumption and operating costs.

[0009] According to some embodiments of the present invention, the active cooling system of the compressed air energy storage power station further includes: a high-temperature heat storage tank and a low-temperature heat storage tank, the heat storage tank and the low-temperature heat storage tank are respectively used to store heat storage medium, and the high-temperature heat storage tank and the low-temperature heat storage tank are arranged in series on the trunk; wherein the trunk includes a first trunk and a second trunk, the first trunk is located between the downstream of the high-temperature heat storage tank and the upstream of the low-temperature heat storage tank, the second trunk is located between the upstream of the high-temperature heat storage tank and the downstream of the low-temperature heat storage tank, the first branch and the second branch are arranged in parallel on the second trunk; the first heat exchanger is configured as a plurality of, at least one of the first heat exchangers is arranged on The first trunk, at least another first heat exchanger is arranged on the second trunk and is located downstream of the first branch and the second branch; the heat storage circuit further includes: a third branch, one end of the third branch is connected to the low-temperature heat storage tank, and the other end of the third branch is connected to the second trunk between the first branch and the first heat exchanger, the first circulation circuit includes a first circuit and a second circuit, the first circuit is formed between the high-temperature heat storage tank, the first trunk, the low-temperature heat storage tank, the first branch and the second trunk, and the second circuit is formed between the low-temperature heat storage tank, the first branch, the third branch and part of the second trunk.

[0010] According to some embodiments of the present invention, the heat storage circuit further includes: a fourth branch, one end of the fourth branch is connected to the first trunk between the high-temperature heat storage tank and the first heat exchanger, and the other end of the fourth branch is connected to the first branch upstream of the second heat exchanger.

[0011] According to some embodiments of the present invention, the cooling circuit is provided with a main cooling pump and a secondary cooling pump which are arranged in parallel with each other.

[0012] The following describes an operating method of an active cooling system for a compressed air energy storage power station according to any one of the above embodiments of the present invention.

[0013] The operating method according to the present invention is used for the active cooling system of a compressed air energy storage power station in any one of the above-mentioned embodiments, and the operating method includes: judging the operating condition of the active cooling system of the compressed air energy storage power station and obtaining the actual cooling load after the low-pressure gas storage condition starts, and calculating the expected cooling load before the charging condition starts according to the actual cooling load and the weather temperature forecast value; judging and selecting the circulation mode of the heat storage circuit according to the difference between the expected cooling load and the rated design condition cooling load.

[0014] According to some embodiments of the present invention, the active cooling system of the compressed air energy storage power station includes: a high-temperature heat storage tank and a low-temperature heat storage tank, the heat storage tank and the low-temperature heat storage tank are respectively used to store heat storage medium, the high-temperature heat storage tank and the low-temperature heat storage tank are arranged in series on the trunk, the trunk includes a first trunk and a second trunk, the first trunk is located between the downstream of the high-temperature heat storage tank and the upstream of the low-temperature heat storage tank, the second trunk is located between the upstream of the high-temperature heat storage tank and the downstream of the low-temperature heat storage tank, the first branch and the second branch are arranged in parallel on the second trunk; the first heat exchanger is configured as a plurality of, at least one of the first heat exchangers The heat storage circuit further comprises: a third branch, one end of the third branch is connected to the low-temperature heat storage tank, and the other end of the third branch is connected to the second trunk between the first branch and the first heat exchanger. The first circulation circuit comprises a first circuit and a second circuit. The high-temperature heat storage tank, the first trunk, the low-temperature heat storage tank, the first branch and the second trunk form the first circuit. The low-temperature heat storage tank, the first branch and the third branch form the second circuit.

[0015] Determining and selecting the circulation mode of the heat storage cycle according to the difference between the expected cooling load and the rated design operating condition cooling load includes: determining that the difference between the expected cooling load and the rated design operating condition cooling load is less than or equal to a first set difference, and starting the second circulation loop; or, determining that the difference between the expected cooling load and the rated design operating condition cooling load is greater than the first set difference and less than or equal to the second set difference, and starting the first loop; or, determining that the difference between the expected cooling load and the rated design operating condition cooling load is greater than the second set difference, and starting the second loop.

[0016] According to some embodiments of the present invention, the operating method further includes: before the charging condition begins, obtaining an actual cooling load, determining whether the actual cooling load has dropped to the rated design condition cooling load, and determining to start the first loop, the second loop, or the second circulation loop based on the determination result.

[0017] According to some embodiments of the present invention, determining whether to start the first loop, the second loop or the second circulation loop according to a determination result includes: if the determination result is yes, starting the second circulation loop; if the determination result is no, starting the second loop and determining whether to start the first loop according to a current electricity price.

[0018] According to some embodiments of the present invention, a high-temperature heat storage tank and a low-temperature heat storage tank are provided on the heat storage circuit; the operation method further comprises: after the low-pressure gas storage condition starts, obtaining the liquid level of the high-temperature heat storage tank, and determining whether it is necessary to cool the heat storage medium in the high-temperature heat storage tank and transport it to the low-temperature heat storage tank according to the liquid level of the high-temperature heat storage tank.

[0019] According to some embodiments of the present invention, the operating method further includes: selecting the start and end times of the energy release condition, the low-pressure gas storage condition, the energy charging condition and the high-pressure gas storage condition according to the daily electricity price distribution.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a structural schematic diagram of an active cooling system for a compressed air energy storage power station according to an embodiment of the present invention;

[0023] Figure 2 is a flow chart of an operating method of an active cooling system for a compressed air energy storage power station according to an embodiment of the present invention;

[0024] Figure 3 is a flow chart of an operating method of an active cooling system for a compressed air energy storage power station according to another embodiment of the present invention;

[0025] Figure 4 is a flow chart of an operating method of an active cooling system for a compressed air energy storage power station according to an embodiment of the present invention;

[0026] Figure 5 is a schematic diagram of a temperature curve of a liquid storage medium in a low-temperature heat storage tank of an active cooling system of a compressed air energy storage power station according to an embodiment of the present invention;

[0027] Figure 6 It is a schematic diagram of the cooling load timing of the active cooling system of a compressed air energy storage power station under rated operating conditions according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 1. Active cooling system of compressed air energy storage power station;

[0030] 111. compressor unit, 112. turbine unit, 113. gas flow channel;

[0031] 12. cooling circuit, 121. main cooling pump, 122. auxiliary cooling pump, 123. cooling source;

[0032] 13. heat storage circuit, 131. trunk, 1311. first trunk, 1312. second trunk, 132. first branch, 133. second branch, 134. third branch, 135. fourth branch, 136. high temperature pump, 137. low temperature pump;

[0033] 14. First heat exchanger, 15. Second heat exchanger, 16. High-temperature heat storage tank, 17. Low-temperature heat storage tank, 18. Gas storage. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the related art, since the surplus heat energy is affected by the ambient temperature, it is difficult for the cooling system to accurately and effectively release the surplus heat energy.

[0038] Reference below Figure 1-Figure 6 The active cooling system 1 of a compressed air energy storage power station according to an embodiment of the present invention is described.

[0039] like Figure 1 As shown, the active cooling system 1 of the compressed air energy storage power station according to the present invention includes a compressor unit 111 and a turbine unit 112. The compressor unit 111 is responsible for compressing the gas to reduce its volume, increase its pressure, and increase its temperature, thereby storing energy. When the stored energy needs to be released, the high-pressure gas is released and enters the turbine unit 112. In the turbine unit 112, the high-pressure gas expands and does work, realizing the conversion of the pressure energy of the gas into mechanical energy, and then into electrical energy. A gas flow channel 113 is provided between the compressor unit 111 and the turbine unit 112, so that the compressed high-pressure gas can be smoothly and efficiently transferred to the turbine unit 112 for subsequent expansion work and power generation processes.

[0040] The active cooling system 1 of the compressed air energy storage power station also includes a cooling circuit 12, in which a circulating cooling medium is provided. The circulating flow of the cooling medium can absorb and take away heat, thereby achieving heat dissipation and temperature reduction. The cooling circuit 12 is connected to the compressor unit 111 and the turbine unit 112, so when the compressor unit 111 and the turbine unit 112 generate heat during operation, the cooling medium can absorb the heat in time and take away the heat through the circulating flow, thereby ensuring the normal operation of the system and the overall stability of the system.

[0041] The active cooling system 1 of the compressed air energy storage power station also includes a heat storage loop 13, in which a circulating heat storage medium is provided. The circulating flow of the heat storage medium can effectively absorb, store and release thermal energy. In the charging stage, the heat of the energy storage gas can be absorbed by the flow of the heat storage medium to achieve cooling of the energy storage gas, so that the energy storage gas can be stored in a more stable and safe state. In the energy release stage, the heat can be released by the flow of the heat storage medium to achieve heating of the energy storage gas, thereby increasing its temperature and pressure, and providing sufficient energy for the subsequent turbine unit 112 to generate electricity.

[0042] The heat storage circuit 13 includes a main circuit 131, a first branch circuit 132 and a second branch circuit 133. The first branch circuit 132 and the second branch circuit 133 are connected in parallel to each other and are respectively connected in series to the main circuit 131. A first circulation circuit is formed between the first branch circuit 132 and the main circuit 131, and a second circulation circuit is formed between the second branch circuit 133 and the main circuit 131, so that the heat storage circuit 13 can flexibly select a circulation mode according to different working conditions and requirements.

[0043] The active cooling system 1 of the compressed air energy storage power station also includes a first heat exchanger 14 and a second heat exchanger 15. The first heat exchanger 14 is arranged on the trunk 131. The first heat exchanger 14 is provided with a first heat exchange channel and a second heat exchange channel. The first heat exchange channel is connected to the trunk 131, and the second heat exchange channel is connected to the gas channel 113. Therefore, the first heat exchanger 14 is used to achieve heat exchange between the heat storage medium and the energy storage gas. The second heat exchanger 15 is arranged on the first branch 132. The second heat exchanger 15 is provided with a third heat exchange channel and a fourth heat exchange channel. The third heat exchange channel is connected to the first branch 132, and the second heat exchange channel is connected to the cooling circuit 12. Therefore, the second heat exchanger 15 is used to achieve heat exchange between the heat storage medium and the cooling medium.

[0044] By arranging the second heat exchanger 15 on the first branch 132, the heat storage medium in the heat storage loop 13 can effectively exchange heat with the cooling medium when the circulation mode of the first circulation loop is started, so as to reduce the temperature of the heat storage medium in the heat storage loop 13, so as to meet the requirement that the heat storage medium can effectively absorb the heat of the energy storage gas during the energy charging stage.

[0045] According to the influence of the ambient temperature on the surplus thermal energy, you can flexibly choose to start the first circulation loop or the second circulation loop. Specifically, when the ambient temperature is high, the system is more likely to accumulate surplus thermal energy, resulting in an increase in the temperature of the heat storage medium. At this time, starting the first circulation loop and cooling the heat storage medium with the cooling medium through the second heat exchanger 15 can effectively reduce its temperature and prepare for the next charging stage. When the ambient temperature is low, the surplus thermal energy accumulated by the system is relatively small, and the temperature of the heat storage medium is maintained at a low level. At this time, starting the second circulation loop can meet the needs of the charging stage without relying on the cooling medium for additional cooling, and the cost is lower. Therefore, the active cooling system 1 of the compressed air energy storage power station can better adapt to various complex working conditions and reduce energy consumption and operating costs.

[0046] Therefore, according to the active cooling system 1 of the compressed air energy storage power station of the present invention, the circulation mode of the heat storage loop 13 can be adjusted according to the ambient temperature, thereby improving the system adaptability and energy efficiency and reducing the operating cost.

[0047] According to some embodiments of the present invention, Figure 1 As shown, the active cooling system 1 of the compressed air energy storage power station also includes a gas storage reservoir 18, which is arranged on the gas flow channel 113. The gas storage reservoir 18 is used to store compressed gas. In the charging stage, the gas is compressed by the compressor unit 111, and the compressed gas has a high pressure and energy density, which is suitable for subsequent energy storage and power generation processes. The compressed gas is transported to the gas storage reservoir 18 for storage so that the stored energy can be quickly released and utilized when needed. In the energy release stage, the high-pressure gas in the gas storage reservoir 18 is released and transported to the turbine unit 112 to meet the power generation needs.

[0048] According to some embodiments of the present invention, Figure 1 As shown, the active cooling system 1 of the compressed air energy storage power station also includes a high-temperature heat storage tank 16 and a low-temperature heat storage tank 17, which are used to store heat storage media respectively, and the high-temperature heat storage tank 16 and the low-temperature heat storage tank 17 are arranged in series on the trunk line 131. Specifically, the high-temperature heat storage tank 16 is used to store a heat storage medium with a high temperature that has absorbed a large amount of heat from the energy storage gas during the energy charging stage. The high-temperature heat storage medium can be released when needed to provide energy for heating the energy storage gas or other heat energy utilization equipment. The low-temperature heat storage tank 17 is used to store the heat storage medium whose temperature has been reduced after the energy release stage or after cooling. At the beginning of the next round of energy charging, the low-temperature heat storage medium can be reheated and used to absorb the heat of the new energy storage gas.

[0049] The trunk 131 includes a first trunk 1311 and a second trunk 1312. The first trunk 1311 is located between the downstream of the high-temperature heat storage tank 16 and the upstream of the low-temperature heat storage tank 17. Therefore, the first trunk 1311 is used to transfer the heat storage medium in the high-temperature heat storage tank 16 to the low-temperature heat storage tank 17. The second trunk 1312 is located between the upstream of the high-temperature heat storage tank 16 and the downstream of the low-temperature heat storage tank 17. Therefore, the second trunk 1312 is used to transfer the heat storage medium in the low-temperature heat storage tank 17 to the high-temperature heat storage tank 16. The first branch 132 and the second branch 133 are arranged in parallel on the second trunk 1312. Therefore, in the process of transferring the heat storage medium in the low-temperature heat storage tank 17 to the high-temperature heat storage tank 16, the temperature of the heat storage medium can be further reduced by the second heat exchanger 15 on the first branch 132, so that the heat storage medium can more efficiently absorb the heat energy of the energy storage gas during the charging stage.

[0050] The first heat exchanger 14 is constructed in multiple configurations, at least one first heat exchanger 14 is disposed in the first trunk 1311, and at least another first heat exchanger 14 is disposed in the second trunk 1312 and is located downstream of the first branch 132 and the second branch 133. In the process of transferring the heat storage medium in the high-temperature heat storage tank 16 to the low-temperature heat storage tank 17 through the first trunk 1311, the heat storage medium can exchange heat with the energy storage gas through the first heat exchanger 14 to increase the temperature of the energy storage gas, so that the energy storage gas can drive the turbine to generate electricity more efficiently. In the process of transferring the heat storage medium in the low-temperature heat storage tank 17 to the high-temperature heat storage tank 16 through the second trunk 1312, the heat storage medium can exchange heat with the energy storage gas through the first heat exchanger 14 to reduce the temperature of the energy storage gas, so that the compressed energy storage gas can be stored in a more stable and safe state.

[0051] The heat storage circuit 13 also includes a third branch 134, one end of the third branch 134 is connected to the low-temperature heat storage tank 17, and the other end of the third branch 134 is connected to the second trunk 1312 between the first branch 132 and the first heat exchanger 14, so that the heat storage medium flowing out of the first branch 132 can directly return to the low-temperature heat storage tank 17 through the third branch 134, shortening the flow path of the heat storage medium and improving the heat dissipation efficiency.

[0052] The first circulation loop includes a first loop and a second loop. The first loop is formed between the high-temperature heat storage tank 16, the first trunk 1311, the low-temperature heat storage tank 17, the first branch 132 and the second trunk 1312. The second loop is formed between the low-temperature heat storage tank 17, the first branch 132, the third branch 134 and part of the second trunk 1312, so that the heat storage loop 13 can more flexibly select the circulation mode according to different working conditions and needs. When the first loop circulation is selected, the heat storage medium circulates between the high-temperature heat storage tank 16 and the low-temperature heat storage tank 17, and is cooled by the second heat exchanger 15 on the first branch 132. When the second loop circulation is selected, the heat storage medium flows out of the low-temperature heat storage tank 17 and is cooled by the second heat exchanger 15 on the first branch 132. After flowing out of the first branch 132, it returns to the low-temperature heat storage tank 17 through the third branch 134, and the cooling efficiency is higher. When the first circulation loop is started, the appropriate circulation mode can be judged and selected according to the cooling load, electricity price and system energy efficiency optimization requirements.

[0053] According to some embodiments of the present invention, Figure 1 As shown, a high temperature pump 136 is provided on the first trunk 1311, and the high temperature pump 136 is used to drive the heat storage medium from the high temperature heat storage tank 16 to the low temperature heat storage tank 17. A low temperature pump 137 is provided on the second trunk 1312 and the low temperature pump 137 is located between the low temperature heat storage tank 17 and the first branch 132 (or the second branch 133), and the low temperature pump 137 is used to drive the heat storage medium from the low temperature heat storage tank 17 to the first branch 132 (or the second branch 133). By providing the high temperature pump 136 and the low temperature pump 137, when starting the first loop, the second loop or the second circulation loop, at least one of the low temperature pump 137 and the high temperature pump 136 is used to provide power to drive the heat storage medium to flow, so as to ensure the circulation of the heat storage medium.

[0054] According to some embodiments of the present invention, Figure 1As shown, the heat storage circuit 13 also includes a fourth branch 135, one end of the fourth branch 135 is connected to the first trunk 1311 between the high-temperature heat storage tank 16 and the first heat exchanger 14, and the other end of the fourth branch 135 is connected to the first branch 132 upstream of the second heat exchanger 15. By setting the fourth branch 135, the remaining heat storage medium in the high-temperature heat storage tank 1616 can be transferred after the turbine is finished, which can ensure that the amount of heat storage medium is sufficient during the next cycle of the system. During the transfer process, the heat storage medium not only flows to the first branch 132 through the fourth branch 135, and then uses the second heat exchanger 15 on the first branch 132 to exchange heat and cool down with the cooling circuit 12, but also this transfer process also takes into account the cooling efficiency range of the cooling system to ensure the cooling effect. At the same time, the heat energy of the high-temperature heat storage tank 16 is effectively reduced and released during this transfer process. The heat storage medium flowing out of the first branch 132 can directly flow into the low-temperature heat storage tank 17 through the third branch 134 , thereby effectively cooling the high-temperature heat storage medium in the high-temperature heat storage tank 16 and smoothly introducing it into the low-temperature heat storage tank 17 .

[0055] It is worth noting that surplus heat energy is mainly generated during the energy release stage of the system. In order to ensure the stability of the intake temperature of the turbine unit 112, the temperature of the low-temperature heat storage tank 17 is often higher than its design value in actual operation. The main reason for this phenomenon is that in order to maintain the stable operation of the turbine process during the energy release process, the first heat exchanger 14 has two control modes: output air temperature control mode and output heat medium water temperature control mode. The switching timing of these two modes is closely related to the operating stability of the system. Especially in the energy release stage under summer conditions, when the first heat exchanger 14 adopts the air temperature control mode, the temperature of the low-temperature heat storage medium will be higher than the design value, and the average temperature of the low-temperature heat storage tank 17 will also be higher accordingly. Therefore, in order to maintain the stable operation of the turbine unit 112, it is usually observed that the temperature of the low-temperature heat storage tank 17 is higher than its design value.

[0056] According to some embodiments of the present invention, Figure 1 As shown, the cooling circuit 12 is provided with a main cooling pump 121 and an auxiliary cooling pump 122 which are arranged in parallel with each other. The main cooling pump 121 and the auxiliary cooling pump 122 are in parallel in the cooling circuit 12, and independently extract cooling medium from a cooling source 123 (such as a cooling tower, etc.), and transport the cooling medium to the equipment or system that needs to be cooled. Since the main cooling pump 121 and the auxiliary cooling pump 122 are in parallel, the operations of the main cooling pump 121 and the auxiliary cooling pump 122 will not interfere with each other, and can be operated separately as needed.

[0057] During the charging phase, the cooling load of the active cooling system 1 of the compressed air energy storage power station is high. At this time, the main cooling pump 121 will start to meet the system's high demand for cooling medium. In the remaining phases, the cooling load of the active cooling system 1 of the compressed air energy storage power station will be relatively low. At this time, the system still needs a certain cooling capacity, and the auxiliary cooling pump 122 will start to provide the necessary cooling medium flow and pressure.

[0058] Reference below Figure 2-Figure 6 The operating method of the active cooling system 1 for a compressed air energy storage power station according to any one of the above embodiments of the present invention is described.

[0059] like Figure 2 , Figure 4 and Figure 5 As shown, the operating method according to the present invention is used for the active cooling system 1 of a compressed air energy storage power station in any one of the above-mentioned embodiments, and the operating method includes: judging the operating condition of the active cooling system 1 of the compressed air energy storage power station and obtaining the actual cooling load after the low-pressure gas storage condition starts, and calculating the expected cooling load before the charging condition starts according to the actual cooling load and the weather temperature forecast value; judging and selecting the circulation mode of the heat storage circuit 13 according to the difference between the expected cooling load and the rated design condition cooling load.

[0060] According to the operating method of the present invention, the operating method will first determine the current operating condition of the active cooling system 1 of the compressed air energy storage power station. The active cooling system 1 of the compressed air energy storage power station has an energy release condition, a low-pressure gas storage condition, a charging condition and a high-pressure gas storage condition. The energy release condition refers to the stage in which the high-pressure energy storage gas is released and expands and performs work through the turbine unit 112, thereby generating electrical energy. The low-pressure gas storage condition refers to the stage in which the pressure of the energy storage gas is reduced and stored after the energy storage gas expands and performs work through the turbine unit 112. The charging condition refers to the stage in which the compressor unit 111 is running, compressing the energy storage gas and storing it in the gas storage reservoir 18. The high-pressure gas storage condition refers to the stage in which the pressure of the energy storage gas in the gas storage reservoir 18 reaches a peak value, which occurs after the charging stage.

[0061] By determining the current operating condition of the active cooling system 1 of the compressed air energy storage power station, a corresponding cooling strategy can be executed according to the cooling requirements of each operating condition.

[0062] After the low-pressure gas storage condition begins, the operation method will obtain the actual cooling load at this time. The actual cooling load reflects the current heat dissipation demand of the system. Next, the operation method will calculate the expected cooling load before the charging condition begins based on the actual cooling load and the weather temperature forecast value. The weather temperature will affect the cooling demand of the system. The future cooling load can be estimated more accurately through the weather temperature forecast value. Finally, the operation method will determine and select the circulation mode of the heat storage circuit 13 based on the difference between the expected cooling load and the rated design condition cooling load. The rated design condition cooling load is the maximum cooling load considered when the system is designed. If the expected cooling load exceeds this value, the operation method selects a more efficient circulation method by adjusting the flow path of the heat storage medium. If the expected cooling load is low, a more energy-saving circulation method can be selected.

[0063] For example, the circulation mode of the heat storage circuit 13 is determined by judging the water storage temperature of the low-temperature water tank and calculating the temperature drop curve of the low-temperature heat storage tank 17. Specifically, according to the natural convection formula (Formula 1), the temperature drop curve of the low-temperature heat storage tank 17 is calculated. Where T is the low-temperature water temperature in the storage tank (unit: K), Ta is the ambient temperature variable (unit: K), T0 is the starting temperature of the low-temperature water in the storage tank (unit: K), and h is the heat transfer coefficient under the natural convection condition of the storage tank (unit: W / (m 2 ·K)), A is the surface area of ​​heat exchange between the tank and the atmosphere (unit: m 2 ), m is the mass of low-temperature water in the storage tank (unit: kg), and c is the specific heat capacity of low-temperature water (unit: J / (kg·K)).

[0064]

[0065] According to some embodiments of the present invention, the active cooling system 1 of the compressed air energy storage power station includes: a high-temperature heat storage tank 16 and a low-temperature heat storage tank 17, the heat storage tank and the low-temperature heat storage tank 17 are respectively used to store heat storage medium, the high-temperature heat storage tank 16 and the low-temperature heat storage tank 17 are arranged in series on a trunk 131, the trunk 131 includes a first trunk 1311 and a second trunk 1312, the first trunk 1311 is located between the downstream of the high-temperature heat storage tank 16 and the upstream of the low-temperature heat storage tank 17, the second trunk 1312 is located between the upstream of the high-temperature heat storage tank 16 and the downstream of the low-temperature heat storage tank 17, the first branch 132 and the second branch 133 are arranged in parallel on the second trunk 1312; the first heat exchanger 14 is constructed as a plurality of, at least one first heat exchanger 14 is arranged on the first trunk 1311, and at least another first heat exchanger 14 is arranged on the second trunk 1312 and is located downstream of the first branch 132 and the second branch 133; the heat storage loop 13 also includes: a third branch 134, one end of the third branch 134 is connected to the low-temperature heat storage tank 17, and the other end of the third branch 134 is connected to the second trunk 1312 between the first branch 132 and the first heat exchanger 14. The first circulation loop includes a first loop and a second loop. The first loop is formed between the high-temperature heat storage tank 16, the first trunk 1311, the low-temperature heat storage tank 17, the first branch 132 and the second trunk 1312, and the second loop is formed between the low-temperature heat storage tank 17, the first branch 132 and the third branch 134.

[0066] like Figure 2 , Figure 4 and Figure 5 As shown, judging and selecting the circulation mode of the heat storage cycle according to the difference between the expected cooling load and the rated design operating condition cooling load includes: judging that the difference between the expected cooling load and the rated design operating condition cooling load is less than or equal to the first set difference, and starting the second circulation loop; or, judging that the difference between the expected cooling load and the rated design operating condition cooling load is greater than the first set difference and less than or equal to the second set difference, and starting the first loop; or, judging that the difference between the expected cooling load and the rated design operating condition cooling load is greater than the second set difference, and starting the second loop.

[0067] When the difference between the expected cooling load and the rated design operating condition cooling load is less than or equal to the first set difference, the second circulation loop is selected to start. When the cooling demand is relatively low, cooling through the second circulation loop can more efficiently utilize thermal energy while reducing unnecessary energy consumption. At this time, the heat storage medium circulates between the high-temperature heat storage tank 16 and the low-temperature heat storage tank 17 for moderate cooling, which not only meets the cooling demand but also avoids energy waste.

[0068] When the difference between the expected cooling load and the rated design operating condition cooling load is greater than the first set difference but less than or equal to the second set difference, the system will start the first loop. When the cooling demand is moderate, the heat storage medium also circulates between the high-temperature heat storage tank 16 and the low-temperature heat storage tank 17, but due to the increase in cooling demand, the heat storage medium further reduces the temperature of the heat storage medium through the second heat exchanger 15 on the first branch 132, and the first loop provides more sufficient cooling capacity to ensure the stability of the system temperature.

[0069] When the difference between the expected cooling load and the rated design operating condition cooling load is greater than the second set difference, the system chooses to start the second loop. When the system accumulates a lot of surplus heat energy, the second loop has a higher cooling efficiency, and deep cooling is performed through the second heat exchanger 15 on the first branch 132, and the cooled heat storage medium is directly returned to the low-temperature heat storage tank 17 through the third branch 134 to ensure that the system is fully prepared for the next charging stage. Although the energy consumption is relatively high, the stable operation and energy efficiency optimization of the system are achieved under extreme conditions.

[0070] Therefore, by flexibly selecting the heat storage cycle method according to the difference between the expected cooling load and the rated design operating cooling load, the system can efficiently utilize thermal energy and reduce energy consumption when the cooling demand is low, provide sufficient cooling to ensure temperature stability when the cooling demand is moderate, and achieve deep cooling to ensure stable system operation when the cooling demand is high, thereby optimizing energy efficiency, reducing costs, and adapting to various complex working conditions.

[0071] For example, when the difference ΔT between the temperature of the low-temperature heat storage tank 17 at the beginning of the charging stage and the low-temperature water design temperature set during the charging stage satisfies the condition of ΔT≤5%, the second circulation loop will be started to achieve more energy-saving and efficient thermal energy management. When ΔT exceeds 5% but does not exceed 7%, that is, 5%<ΔT≤7%, the system chooses to start the first loop to ensure that the heat storage medium can be fully cooled, thereby maintaining the stability of the system temperature. If ΔT increases further and exceeds 7%, the system will start the second loop, but at this time a more efficient cooling mode is used to cope with the situation where the system accumulates a lot of surplus heat energy, ensuring that the system can be fully prepared before the charging stage to achieve stable operation and energy efficiency optimization.

[0072] In the embodiment, the thresholds of 5% and 7% mentioned are determined after comprehensive consideration of the designed low-temperature heat storage medium temperature of the low-temperature heat storage tank 17, the designed heat exchange power of the heat exchanger, and the reserved heat exchange margin. The selection of these parameters is intended to optimize the thermal energy management process, to ensure that under different temperature difference conditions (ΔT), the system can adopt the most energy-saving and efficient operation strategy, including selectively starting the first loop and the second loop, and adjusting the cooling mode, so as to maintain the stability of the system temperature, effectively manage and dissipate the surplus heat energy accumulated in the system, and provide a guarantee for the full preparation of the system before the charging stage, and finally achieve the purpose of stable operation and energy efficiency optimization.

[0073] According to some embodiments of the present invention, Figure 2 , Figure 4 and Figure 5 As shown, the operating method also includes: before the charging condition starts, obtaining the actual cooling load, determining whether the actual cooling load drops to the rated design condition cooling load, and determining to start the first loop, the second loop or the second circulation loop according to the determination result.

[0074] Before charging, that is, before preparing to compress the energy storage gas and store energy, the current actual cooling load is obtained. The actual cooling load reflects the cooling capacity actually required by the system to maintain normal operation in the current state. Then, by determining whether the actual cooling load has dropped to the rated design condition cooling load, it can be determined whether the cooling effect under the design state has been achieved. Based on the judgment result, the most appropriate heat storage cycle method will be further selected to start.

[0075] If the cooling demand of the system has been reduced, you can choose to start the second circulation loop to maintain the stable operation of the system in a more energy-saving and efficient way. If the actual cooling load is still higher than the rated design operating condition cooling load, it means that the system still needs more cooling capacity to meet the current operating needs, so you can choose to start the first loop or the second loop. Both the first loop and the second loop have the ability to provide higher cooling efficiency, and can quickly and effectively dissipate the excess heat energy of the thermal storage system to ensure the energy balance of the next energy storage cycle.

[0076] According to some embodiments of the present invention, Figure 2 and Figure 4 As shown, determining whether to start the first loop, the second loop or the second circulation loop according to the determination result includes: if the determination result is yes, starting the second circulation loop; if the determination result is no, starting the second loop and determining whether to start the first loop according to the current electricity price.

[0077] If the judgment result is yes, that is, the predicted cooling load has dropped to the rated design operating cooling load, indicating that the system has achieved the cooling effect under the design state, the second circulation loop will be started at this time, because the second circulation loop can maintain the stable operation of the system while operating in a more energy-saving and efficient manner, thereby further reducing the system's energy consumption and operating costs.

[0078] If the judgment result is no, that is, the predicted cooling load is still higher than the rated design operating condition cooling load, the system needs more cooling capacity to meet the current operating needs, and the second circuit is started to provide more sufficient cooling capacity. And choose whether to start the first circuit according to the current electricity price to achieve the best energy efficiency and economy. Specifically, the daily electricity price will fluctuate at different times, with higher prices during peak electricity consumption and lower prices during valley electricity consumption. If the electricity price happens to be at a peak time, you can choose to start the first circuit. Considering that the electricity price is higher during peak hours, starting the first circuit with relatively low energy consumption can help reduce electricity expenditure, thereby reducing overall operating costs. On the contrary, if the current electricity price is at a valley period, you can choose not to start the first circuit and keep starting the second circuit, so that you can use the valley period for efficient cooling operations and provide a more efficient cooling effect for the charging stage.

[0079] According to some embodiments of the present invention, Figure 2 As shown, a high-temperature heat storage tank 16 and a low-temperature heat storage tank 17 are provided on the heat storage circuit 13; the operation method further includes: after the low-pressure gas storage condition starts, obtaining the liquid level of the high-temperature heat storage tank 16, and determining whether it is necessary to cool the heat storage medium in the high-temperature heat storage tank 16 and transport it to the low-temperature heat storage tank 17 according to the liquid level of the high-temperature heat storage tank 16.

[0080] After the low-pressure gas storage condition starts, the liquid level information of the heat storage medium in the high-temperature heat storage tank 16 will be obtained first. The liquid level information reflects the stock of the heat storage medium in the heat storage tank. By monitoring the liquid level, it can be determined whether the liquid level of the heat storage medium in the high-temperature heat storage tank 16 has reached the designed low liquid level. If the liquid level is lower than the designed low liquid level, it indicates that the stock of the heat storage medium in the low-temperature heat storage tank 17 is sufficient to meet the demand of the charging condition for the low-temperature heat storage medium. Therefore, it is not necessary to cool the heat storage medium in the high-temperature heat storage tank 16 and transport it to the low-temperature heat storage tank 17. If the liquid level is higher than the designed low liquid level, it indicates that the stock of the heat storage medium in the low-temperature heat storage tank 17 is insufficient and cannot meet the demand of the charging condition for the low-temperature heat storage medium. Therefore, it is necessary to cool the heat storage medium in the high-temperature heat storage tank 16 and transport it to the low-temperature heat storage tank 17.

[0081] Illustratively, the heat storage medium flowing out of the high-temperature heat storage tank 16 can flow to the first branch 132 through the fourth branch 135, and then exchange heat and cool down with the cooling circuit 12 through the second heat exchanger 15 on the first branch 132. The heat storage medium flowing out of the first branch 132 can directly flow into the low-temperature liquid outlet tank through the third branch 134, thereby achieving the cooling of the high-temperature heat storage medium in the high-temperature heat storage tank 16 and introducing it into the low-temperature heat storage tank 17.

[0082] According to some embodiments of the present invention, Figure 3 and Figure 6 As shown, the operating method also includes: selecting the start and end time of the energy release condition, the low-pressure gas storage condition, the energy charging condition and the high-pressure gas storage condition according to the daily electricity price distribution.

[0083] Through the daily electricity price distribution, the operation arrangement of the unit can be optimized according to the level of electricity price. For example, during the period of low electricity price, the compressor unit 111 tends to be started for charging operation, because the electricity cost is low at this time, which can greatly reduce the energy storage cost. On the contrary, during the peak period of electricity consumption when the electricity price is high, the turbine unit 112 can be started for energy release, and the stored compressed air energy can be converted into electrical energy, which not only meets the power demand of the power grid during the peak period, but also maximizes the economic benefits.

[0084] Figure 6 The cooling load changes of the compressor unit 111, the turbine unit 112 and the first heat exchanger 14 are arranged according to the start and end time of the energy release condition, the low-pressure gas storage condition, the energy charging condition and the high-pressure gas storage condition according to the electricity price distribution. Figure 6 The operating characteristics of the compressed air energy storage system 1 under different working conditions and the cooling load fluctuations of each component are depicted in a time series manner.

[0085] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A compressed air energy storage power station active cooling system, characterized in that: include: A compressor unit (111) and a turbine unit (112), wherein a gas flow passage (113) is provided between the compressor unit (111) and the turbine unit (112); A cooling circuit (12), wherein a circulating cooling medium is provided in the cooling circuit (12), and the cooling circuit (12) is connected to the compressor unit (111) and the turbine unit (112); A heat storage circuit (13), wherein a circulating heat storage medium is provided in the heat storage circuit (13), wherein the heat storage circuit (13) comprises a main circuit (131), a first branch circuit (132) and a second branch circuit (133), wherein the first branch circuit (132) and the second branch circuit (133) are connected in parallel to each other and are respectively connected in series to the main circuit (131), wherein a first circulation circuit is formed between the first branch circuit (132) and the main circuit (131), and a second circulation circuit is formed between the second branch circuit (133) and the main circuit (131); a first heat exchanger (14), the first heat exchanger (14) being arranged on the trunk (131), the first heat exchanger (14) being provided with a first heat exchange channel and a second heat exchange channel, the first heat exchange channel being in communication with the trunk (131), and the second heat exchange channel being in communication with the gas channel (113); A second heat exchanger (15), wherein the second heat exchanger (15) is arranged in the first branch (132), and the second heat exchanger (15) is provided with a third heat exchange channel and a fourth heat exchange channel, wherein the third heat exchange channel is connected to the first branch (132), and the second heat exchange channel is connected to the cooling circuit (12).

2. The active cooling system for a compressed air energy storage power station according to claim 1, characterized in that: Also includes: a high-temperature heat storage tank (16) and a low-temperature heat storage tank (17), wherein the heat storage tank and the low-temperature heat storage tank (17) are respectively used to store heat storage medium, and the high-temperature heat storage tank (16) and the low-temperature heat storage tank (17) are arranged in series on the trunk line (131); The trunk (131) comprises a first trunk (1311) and a second trunk (1312); the first trunk (1311) is located between the downstream of the high-temperature heat storage tank (16) and the upstream of the low-temperature heat storage tank (17); the second trunk (1312) is located between the upstream of the high-temperature heat storage tank (16) and the downstream of the low-temperature heat storage tank (17); and the first branch (132) and the second branch (133) are arranged in parallel on the second trunk (1312); The first heat exchanger (14) is configured as a plurality of first heat exchangers (14), at least one of the first heat exchangers (14) is arranged on the first trunk (1311), and at least another of the first heat exchangers (14) is arranged on the second trunk (1312) and is located downstream of the first branch (132) and the second branch (133); The heat storage circuit (13) further comprises: a third branch (134), one end of the third branch (134) being connected to the low-temperature heat storage tank (17), and the other end of the third branch (134) being connected to the second trunk (1312) between the first branch (132) and the first heat exchanger (14); the first circulation circuit comprises a first circuit and a second circuit; the first circuit is formed between the high-temperature heat storage tank (16), the first trunk (1311), the low-temperature heat storage tank (17), the first branch (132) and the second trunk (1312); and the second circuit is formed between the low-temperature heat storage tank (17), the first branch (132), the third branch (134) and a part of the second trunk (1312).

3. The active cooling system for a compressed air energy storage power station according to claim 2, characterized in that: The heat storage circuit (13) further comprises: a fourth branch (135), one end of the fourth branch (135) being connected to the first trunk (1311) between the high-temperature heat storage tank (16) and the first heat exchanger (14), and the other end of the fourth branch (135) being connected to the first branch (132) upstream of the second heat exchanger (15).

4. The active cooling system for a compressed air energy storage power station according to claim 1, characterized in that: The cooling circuit (12) is provided with a main cooling pump (121) and an auxiliary cooling pump (122) which are arranged in parallel with each other.

5. An operating method for the active cooling system of a compressed air energy storage power station according to any one of claims 1 to 4, characterized in that: include: Determine the operating condition of the active cooling system of the compressed air energy storage power station and obtain the actual cooling load after the low-pressure gas storage condition begins, and calculate the expected cooling load before the charging condition begins based on the actual cooling load and the weather temperature forecast value; The circulation mode of the heat storage circuit (13) is determined and selected according to the difference between the expected cooling load and the rated design operating condition cooling load.

6. The operating method of the active cooling system of the compressed air energy storage power station according to claim 5, characterized in that: The compressed air energy storage power station active cooling system comprises: a high-temperature heat storage tank (16) and a low-temperature heat storage tank (17), the heat storage tank and the low-temperature heat storage tank (17) being used to store heat storage medium respectively, the high-temperature heat storage tank (16) and the low-temperature heat storage tank (17) being arranged in series on the trunk (131), the trunk (131) comprising a first trunk (1311) and a second trunk (1312), the first trunk (1311) being located between the downstream of the high-temperature heat storage tank (16) and the upstream of the low-temperature heat storage tank (17), the second trunk (1312) being located between the upstream of the high-temperature heat storage tank (16) and the downstream of the low-temperature heat storage tank (17), the first branch (132) and the second branch (133) being arranged in parallel on the second trunk (1312); The first heat exchanger (14) is configured as a plurality of first heat exchangers (14), at least one of the first heat exchangers (14) is arranged on the first trunk (1311), and at least another of the first heat exchangers (14) is arranged on the second trunk (1312) and is located downstream of the first branch (132) and the second branch (133); The heat storage circuit (13) further comprises: a third branch (134), one end of the third branch (134) being connected to the low-temperature heat storage tank (17), and the other end of the third branch (134) being connected to the second trunk (1312) between the first branch (132) and the first heat exchanger (14); the first circulation circuit comprises a first circuit and a second circuit; the first circuit is formed between the high-temperature heat storage tank (16), the first trunk (1311), the low-temperature heat storage tank (17), the first branch (132) and the second trunk (1312); and the second circuit is formed between the low-temperature heat storage tank (17), the first branch (132) and the third branch (134); Determining and selecting the circulation mode of the heat storage cycle according to the difference between the expected cooling load and the rated design operating condition cooling load includes: Determining that the difference between the expected cooling load and the rated design operating condition cooling load is less than or equal to a first set difference, and starting the second circulation loop; or, determining that the difference between the expected cooling load and the rated design operating condition cooling load is greater than a first set difference and less than or equal to a second set difference, and starting the first loop; Or, it is determined that the difference between the expected cooling load and the rated design operating condition cooling load is greater than a second set difference, and the second loop is started.

7. The operating method of the active cooling system of the compressed air energy storage power station according to claim 6, characterized in that: Also includes: Before the charging condition starts, the actual cooling load is obtained to determine whether the actual cooling load drops to the rated design condition cooling load, and the first loop, the second loop or the second circulation loop is started according to the determination result.

8. The operating method of the active cooling system of a compressed air energy storage power station according to claim 7, characterized in that: Determining, according to the determination result, to start the first loop, the second loop, or the second circulation loop comprises: If the determination result is yes, then starting the second circulation loop; If the determination result is no, the second circuit is started and it is determined whether to start the first circuit according to the current electricity price.

9. The operating method of the active cooling system of a compressed air energy storage power station according to claim 5, characterized in that: The heat storage circuit (13) is provided with a high-temperature heat storage tank (16) and a low-temperature heat storage tank (17); The operation method further comprises: after the low-pressure gas storage condition starts, obtaining the liquid level of the high-temperature heat storage tank (16), and determining, according to the liquid level of the high-temperature heat storage tank (16), whether it is necessary to cool the heat storage medium in the high-temperature heat storage tank (16) and transport it to the low-temperature heat storage tank (17).

10. The operating method of the active cooling system of a compressed air energy storage power station according to claim 5, characterized in that: The operating method also includes: selecting the start and end times of the energy release condition, the low-pressure gas storage condition, the energy charging condition and the high-pressure gas storage condition according to the daily electricity price distribution.

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