Power supply system

Abstract

The present application provides a power supply system, comprising: multiple new energy devices; a thermal energy storage device for storing the thermal energy output by at least one new energy device; an air compression and liquefaction device for using electric energy to compress air and condensing the compressed air into liquid air; a liquid air energy storage device for storing the liquid air output by the air compression and liquefaction device; at least one cold and thermal energy power generation device, each cold and thermal energy power generation device being used to generate electric energy and high-pressure air by simultaneously using thermal energy and cold energy; a pneumatic generator set for using the high-pressure air output by at least one cold and thermal energy power generation device to generate electric energy; a substation for receiving the electric energy output by at least one new energy device, at least one cold and thermal energy power generation device, and the pneumatic generator set, and supplying electric energy to the air compression and liquefaction device and the external power grid; at least one cold and thermal energy power generation device and the pneumatic generator set are jointly applied to the air energy storage and thermal energy storage power generation scenarios of the power supply system.

Description

Technical Field

[0001] The present application generally relates to the field of electric power technology, and more specifically, to a power supply system. Background Art

[0002] New energy, also known as unconventional energy, refers to various forms of energy other than traditional energy. That is, energy that has just begun to be developed or is being actively studied and is yet to be promoted, such as solar energy, geothermal energy, wind energy, ocean energy, biomass energy, etc. New energy generally has the following characteristics: 1) rich resources, generally have renewable characteristics, and can be used sustainably by humans; 2) contain no carbon or contain very little carbon, and have little impact on the environment; 3) are widely distributed, which is conducive to small-scale decentralized utilization; 4) are intermittently supplied, with large fluctuations, which is not conducive to continuous energy supply. Summary of the invention

[0003] An exemplary embodiment of the present application is to provide a power supply system that can effectively utilize new energy for power supply.

[0004] According to an embodiment of the present application, there is provided a power supply system, comprising: a plurality of new energy devices, wherein at least one new energy device is used to convert new energy into electrical energy, and at least one new energy device is used to convert new energy into thermal energy; a thermal energy storage device, used to store thermal energy output by at least one new energy device; an air compression liquefaction device, used to compress air using electrical energy output by at least one new energy device and a substation, and condense the compressed air into liquid air; a liquid air energy storage device, used to store liquid air output by the air compression liquefaction device; at least one cold and heat energy power generation device, wherein each cold and heat energy power generation device is used to simultaneously use thermal energy and cold energy to generate electrical energy and high-pressure air, and the In the embodiment, the thermal energy storage device and at least one new energy device provide thermal energy to the at least one cold and heat energy power generation device, and the liquid air energy storage device outputs liquid air to the at least one cold and heat energy power generation device to provide cold energy; the pneumatic generator set is used to generate electrical energy using the high-pressure air output by the at least one cold and heat energy power generation device; the substation is used to receive the electrical energy output by at least one new energy device, the at least one cold and heat energy power generation device, and the pneumatic generator set, and provide electrical energy to the air compression liquefaction device and the external power grid; wherein the at least one cold and heat energy power generation device and the pneumatic generator set are jointly used in the air energy storage and thermal energy storage power generation scenarios of the power supply system.

[0005] Optionally, it further includes: at least one engine, a first water tower, a second water tower, a water turbine generator set, a water level control device, a water head control device, and a water head regulating device; wherein, the liquid flowing out of the second water tower respectively flows into the water turbine generator set and the water head regulating device after the water head is controlled by the water head control device, and the liquid after the water head is regulated by the water head regulating device flows into the water turbine generator set; the water turbine generator set generates electric energy by using the liquid flowing into it and outputs the electric energy to the substation, and the liquid discharged by the water turbine generator set is recycled to the first water tower through the water level control device; the first water tower supplies liquid to the second water tower and is used to provide liquid pressure buffering for the second water tower; the at least one engine is used to provide kinetic energy for the water head regulating device and the water level control device.

[0006] Optionally, it further includes: an artificial intelligence dispatching management center, which is used to monitor and control the states of the multiple new energy devices, the thermal energy storage device, the air compression and liquefaction device, the liquid air energy storage device, the at least one cold and heat power generation device, the pneumatic generator set, the substation, and the water head control device.

[0007] Optionally, the artificial intelligence dispatching management center determines the power generation plan, power supply plan, and energy storage plan of the power supply system according to the power demand, electricity price, and available new energy situation of the external power grid; and controls the states of the multiple new energy devices, the thermal energy storage device, the air compression and liquefaction device, the liquid air energy storage device, the at least one cold and heat power generation device, the pneumatic generator set, the substation, and the water head control device according to the power generation plan, the power supply plan, and the energy storage plan.

[0008] Optionally, the at least one engine includes: a Stirling engine and a pneumatic motor; the Stirling engine is used to generate kinetic energy and high-pressure air by using the thermal energy output by the thermal energy storage device and at least one new energy device, and the liquid air output by the liquid air energy storage device, and output the generated high-pressure air to the pneumatic generator set and the pneumatic motor; the pneumatic motor is used to generate kinetic energy by using the high-pressure air output by the at least one cold and heat power generation device and the Stirling engine.

[0009] Optionally, it further includes: a heat exchange device, which is used to receive the hot water output by the air compression and liquefaction device, output cold water to the air compression and liquefaction device, and output thermal energy to the thermal energy storage device.

[0010] Optionally, the cooling system of at least one new energy device outputs hot water to the heat exchange device, and the cooling system receives the cold water output by the heat exchange device.

[0011] Optionally, it further includes: a booster pump, configured to boost the liquid air output by the liquid air energy storage device and then input the boosted liquid air into the at least one cold and heat energy power generation device and the Stirling engine.

[0012] Optionally, the at least one cold and heat energy power generation device includes: a thermoelectric power generation device and a Stirling generator set.

[0013] Optionally, the types of the multiple new energy devices include at least one of the following: a wind power generation device, an ocean energy power generation device, a geothermal energy power generation device, a solar power generation device, a biomass energy power generation device, and a solar heating device.

[0014] Optionally, it further includes: an external power access device, configured to access the electric energy in the external power grid to the substation during the low electricity consumption period of the external power grid.

[0015] Optionally, it further includes: a chemical energy storage device, configured to store the electric energy obtained from the substation and output the electric energy to the substation when the power supply system needs emergency power supply.

[0016] In the power supply system according to the exemplary embodiment of the present application, multiple new energy devices and energy storage devices are compatible, and new energy can be used more effectively and reasonably for power supply, improving the energy utilization rate and power generation efficiency.

[0017] Additional aspects and / or advantages of the general concept of the present application will be partially described in the following description, and some will be clear from the description, or can be learned through the implementation of the general concept of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Through the following description with reference to the drawings showing exemplary embodiments, the above and other objects and features of the exemplary embodiments of the present application will become clearer, wherein:

[0019] Figure 1 Showing a structural block diagram of a power supply system according to a first exemplary embodiment of the present application;

[0020] Figure 2 Showing a structural block diagram of a power supply system according to a second exemplary embodiment of the present application;

[0021] Figure 3 Showing a structural block diagram of a power supply system according to a third exemplary embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Reference will now be made in detail to the embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals always refer to the same components. The following embodiments will be described by referring to the drawings in order to explain the present application.

[0023] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of this application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order other than those illustrated or described here. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. On the contrary, they are only examples of devices and methods consistent with some aspects of this application as detailed in the appended claims.

[0024] It should be noted here that "at least one of several items" in this application all represents the inclusion of the following three parallel situations: "any one of the several items", "any combination of several items among them", and "all of the several items". For example, "including at least one of A and B" includes the following three parallel situations: (1) including A; (2) including B; (3) including A and B.

[0025] Figure 1 The structural block diagram of the power supply system according to the first exemplary embodiment of this application is shown.

[0026] Refer to Figure 1 , the power supply system according to the first exemplary embodiment of this application includes: multiple new energy devices 100, a thermal energy storage device 200, an air compression and liquefaction device 300, a liquid air energy storage device 400, at least one cold and heat power generation device 500, a pneumatic generator set 600, and a substation 700.

[0027] Specifically, at least one new energy device 100 in the power supply system is used to convert new energy into electric energy, and at least one new energy device 100 is used to convert new energy into thermal energy. Figure 1 The red line in represents the thermal energy transmission path.

[0028] As an exemplary embodiment, the type of the new energy device 100 may include but is not limited to at least one of the following items: a wind power generation device, an ocean energy power generation device, a geothermal energy power generation device, a solar power generation device, a biomass energy power generation device, a solar heating device.

[0029] The wind power generation device is used to convert wind energy into electric energy. As an example, the type of the wind power generation device may specifically be a wind turbine generator set.

[0030] The ocean energy power generation device is used to convert ocean energy into electric energy. As an example, the type of the ocean energy power generation device may specifically include: an ocean thermal energy conversion power generation device and / or a tidal power generation device.

[0031] A geothermal power generation device is used to convert geothermal energy into electrical energy. As an example, the type of the geothermal power generation device can specifically be a geothermal temperature difference power generation device.

[0032] A solar power generation device is used to convert solar energy into electrical energy. As an example, the type of the solar power generation device can specifically be a photovoltaic module.

[0033] A biomass power generation device is used to convert biomass energy into electrical energy and thermal energy. As an example, the type of the biomass power generation device can specifically include at least one of the following items: a biogas power generation device, a vegetable oil power generation device, and a kitchen waste grease power generation device.

[0034] A solar heating device is used to convert solar energy into thermal energy. As an example, the type of the solar heating device can specifically include: a solar water heater and / or a solar heat collection device.

[0035] It should be understood that the types of all or part of the new energy devices 100 among multiple new energy devices 100 can be the same or different, and this application places no restrictions on the types of the multiple new energy devices 100 and the quantity of each type.

[0036] A thermal energy storage device 200 is used to store the thermal energy output by at least one new energy device 100.

[0037] An air compression and liquefaction device 300 is used to compress air by using the electrical energy output by at least one new energy device 100 and a substation 700, and condense the compressed air into liquid air.

[0038] As an exemplary embodiment, the air compression and liquefaction device 300 can include an air compressor 301 for compressing air and a liquefaction device 302 for condensing the compressed air into liquid air.

[0039] A liquid air energy storage device 400 is used to store the liquid air output by the air compression and liquefaction device 300.

[0040] As an exemplary embodiment, the liquid air energy storage device 400 can be a sealed tank capable of storing liquid air.

[0041] A cold and thermal energy power generation device 500 is used to simultaneously use thermal energy and cold energy to generate electrical energy and high-pressure air.

[0042] The thermal energy storage device 200 and at least one new energy device 100 supply thermal energy to at least one cold-heat power generation device 500, and the liquid air energy storage device 400 outputs liquid air to at least one cold-heat power generation device 500 to provide cold energy. In other words, the hot end of the cold-heat power generation device 500 receives the thermal energy provided by the thermal energy storage device 200 and at least one new energy device 100, and the cold end of the cold-heat power generation device 500 receives the low-temperature liquid air provided by the liquid air energy storage device 400. Thus, the heat difference drives the cold-heat power generation device 500 to generate electric energy, and the low-temperature liquid air becomes high-pressure gas after passing through the cold-heat power generation device 500.

[0043] As an exemplary embodiment, the type of the cold-heat power generation device 500 may include but is not limited to: a thermoelectric power generation device and / or a Stirling generator set. As an example, the thermoelectric power generation device may output electric energy to the substation 700 via a thermoelectric energy storage inverter power supply (not shown).

[0044] The pneumatic generator set 600 is used to generate electric energy by using the high-pressure air output by at least one cold-heat power generation device 500.

[0045] According to an exemplary embodiment of the present disclosure, at least one cold-heat power generation device 500 and the pneumatic generator set 600 are jointly applied to the air energy storage and thermal energy storage power generation scenarios of the power supply system.

[0046] The substation 700 is used to receive electric energy, transform voltage and current, and distribute electric energy. Specifically, it receives the electric energy output by at least one new energy device 100, at least one cold-heat power generation device 500, and the pneumatic power generation device 600, and supplies electric energy to the air compression and liquefaction device 300 and the external power grid.

[0047] As an exemplary embodiment, the substation 700 may specifically include an intelligent controller and an inverter. The inverter can be used to convert the received electric energy into electric energy meeting the requirements of the external power grid.

[0048] According to an exemplary embodiment of the present disclosure, the temperature potential energy of the liquid air and the pressure energy generated during the liquid-gasification process are separately utilized, avoiding energy waste and significantly improving the energy utilization rate.

[0049] Figure 2 The structural block diagram of the power supply system according to the second exemplary embodiment of the present application is shown.

[0050] Refer to Figure 2, the power supply system according to the second exemplary embodiment of the present application further includes, in addition to multiple new energy devices 100, a thermal energy storage device 200, an air compression and liquefaction device 300, a liquid air energy storage device 400, at least one cold and thermal energy power generation device 500, a pneumatic generator set 600, and a substation 700: at least one engine 800, a first water tower 900, a second water tower 1000, a water turbine generator set 1100, a water level control device 1200, a water head control device 1300, and a water head adjustment device 1400.

[0051] Figure 2 The red lines in it represent the thermal energy transmission path, and the blue lines represent the liquid flow path.

[0052] Specifically, the liquid flowing out of the second water tower 1000 is respectively controlled by the water head control device 1300 for the water head and then flows into the water turbine generator set 1100 and the water head adjustment device 1400, and the liquid after the water head is adjusted by the water head adjustment device 1400 flows into the water turbine generator set 1100.

[0053] The water turbine generator set 1100 generates and outputs electric energy to the substation 700 by using the liquid flowing into it, and the liquid discharged by the water turbine generator set 1100 is recycled to the first water tower 900 through the water level control device 1200. That is, electric energy is generated by the circulating liquid doing work on the water turbine generator set 1100.

[0054] The second water tower 1000 is the main liquid storage mechanism, and the first water tower 900 provides liquid to the second water tower 1000 and is used to provide liquid pressure buffering for the second water tower 1000. As an example, the first water tower 900 may be internally provided with a first liquid level sensor, and the second water tower 1000 may be internally provided with a second liquid level sensor.

[0055] At least one engine 800 is used to provide kinetic energy for the water head adjustment device 1400 and the water level control device 1200. As an exemplary embodiment, at least one engine 800 may include a Stirling engine 801 and a pneumatic engine 802.

[0056] The Stirling engine 801 is used to use the thermal energy output by the thermal energy storage device 200 and at least one new energy device 100, and the liquid air output by the liquid air energy storage device 400, to generate kinetic energy and high-pressure air, and output the generated high-pressure air to the pneumatic generator set 600 and the pneumatic engine 802. For example, the kinetic energy generated by the Stirling engine 801 can be provided to the water head adjustment device 1400.

[0057] The pneumatic engine 802 is used to use the high-pressure air output by at least one cold and thermal energy power generation device 500 and the Stirling engine 801 to generate kinetic energy. For example, the kinetic energy generated by the pneumatic engine 802 can be provided to the water level control device 1200.

[0058] As an exemplary embodiment, the water head control device 1300 is used to mainly control the pressure of the liquid flowing into the hydro-generator set 1100, and the water head regulating device 1400 is used to assist in regulating the pressure of the liquid flowing into the hydro-generator set 1100.

[0059] As an exemplary embodiment, the water level control device 1200 may specifically include a water pump and a controller configured with an artificial intelligence algorithm, which is mainly used to control the liquid volume flowing into the second water tower 1000, that is, to control the liquid level of the second water tower 1000. As an example, the water level control device 1200 may obtain the liquid level measurement data of the first liquid level sensor and the second liquid level sensor in real time.

[0060] In addition, as an exemplary embodiment, the water head regulating device 1400 may also specifically be an artificial intelligence water head regulating device.

[0061] According to the exemplary embodiment of the present disclosure, a liquid power generation and energy storage part is proposed, which is jointly composed of a first water tower 900, a second water tower 1000, a hydro-generator set 1100, a water level control device 1200, a water head control device 1300, a water head regulating device 1400, and at least one engine 800.

[0062] In addition, the power supply system according to the second exemplary embodiment of the present application may further include: an artificial intelligence dispatching and management center 2000.

[0063] The artificial intelligence dispatching and management center 2000 is used to monitor and control the states of the multiple new energy devices 100, the thermal energy storage device 200, the air compression and liquefaction device 300, the liquid air energy storage device 400, the at least one cold and heat power generation device 500, the pneumatic generator set 600, the substation 700, and the water head control device 1300, so as to maximize the efficiency and economic benefits of the power supply system. In addition, the artificial intelligence dispatching and management center 2000 can also monitor and control the states of at least one engine 800, the first water tower 900, the second water tower 1000, the hydro-generator set 1100, the water level control device 1200, and the water head regulating device 1400.

[0064] As an exemplary embodiment, the artificial intelligence scheduling management center 2000 can determine the power generation plan, power supply plan, and energy storage plan of the power supply system according to the power demand, electricity price, and available new energy of the external power grid; and control the states of multiple new energy devices 100, thermal energy storage devices 200, air compression and liquefaction devices 300, liquid air energy storage devices 400, the at least one cold and heat power generation device 500, pneumatic generator sets 600, substations 700, and head control devices 1300 according to the power generation plan, power supply plan, and energy storage plan. For example, the working state, shutdown state, maintenance state, fuel addition state, etc.

[0065] Further, the artificial intelligence scheduling management center 2000 can determine the power generation plan, power supply plan, and energy storage plan of the power supply system according to the power demand, electricity price, available new energy of the external power grid, and the conditions of each device in the power supply system (for example, whether it is in a fault or maintenance state, the energy storage situation, etc.).

[0066] As an example, due to factors such as peak and valley electricity consumption times and electricity price fluctuations, the power demand and electricity price of the external power grid can specifically include: the power demand and electricity price of each time period of the external power grid.

[0067] As an example, the available new energy situation can specifically include: daily solar energy situation / daily wind energy situation / daily ocean energy situation / daily geothermal energy situation, and can further include the remaining situation of biogas / vegetable oil / kitchen waste grease.

[0068] As an example, the power generation plan / power supply plan / energy storage plan can be a daily plan and can be accurate to the plan of each time period.

[0069] As an example, according to the power generation plan, power supply plan, and energy storage plan, the operation time, power, operation mode, etc. of multiple new energy devices 100, thermal energy storage devices 200, air compression and liquefaction devices 300, liquid air energy storage devices 400, the at least one cold and heat power generation device 500, pneumatic generator sets 600, substations 700, and head control devices 1300 can be coordinated.

[0070] In addition, the artificial intelligence scheduling management center 2000 can also automatically coordinate arrangements for equipment maintenance, fuel addition, etc., and assist staff in formulating work plans.

[0071] In addition, each sub - part in the power supply system can maximize the operating efficiency within the sub - part according to the control instructions of the artificial intelligence scheduling and management center 2000. For example: in the circulating liquid power generation and storage part, the water head control device 1300 can, according to the control instructions of the artificial intelligence scheduling and management center 2000, monitor the states of the first water tower 900, the second water tower 1000, the hydro - generator set 1100, the water level control device 1200, the water head adjustment device 1400, and at least one engine 800, and then decide the operating states of the power ends (the Stirling engine 801 and the pneumatic motor 802) by itself, so as to maintain the liquid level height in the second water tower 1000 and generate electricity.

[0072] Figure 3 Shows a structural block diagram of a power supply system according to a third exemplary embodiment of the present application. Figure 3 The red lines in it represent the heat energy transmission paths, and the blue lines represent the liquid flow paths.

[0073] As Figure 3 As shown, the power supply system according to the third exemplary embodiment of the present application further includes, in addition to: multiple new energy devices 100, a heat energy storage device 200, an air compression and liquefaction device 300, a liquid air energy storage device 400, at least one cold - heat energy power generation device 500, a pneumatic generator set 600, and a substation 700, a heat exchange device 1500.

[0074] The heat exchange device 1500 is used to receive the hot water output by the air compression and liquefaction device 300, output cold water to the air compression and liquefaction device 300, and output heat energy to the heat energy storage device 200.

[0075] As an exemplary embodiment, when the air compression and liquefaction device 300 includes an air compressor 301 and a liquefaction device 302, the heat exchange device 1500 provides cold water to the air compressor 301 and the liquefaction device 302, and the air compressor 301 and the liquefaction device 302 provide hot water to the heat exchange device 1500. As an example, at least one new energy device 100 and the substation 700 provide electrical energy to the air compressor 301.

[0076] As an exemplary embodiment, the cooling system of at least one new energy device 100 can output hot water to the heat exchange device 1500, and the cooling system receives the cold water output by the heat exchange device 1500, so that the heat exchange device 1500 can collect the heat energy generated by the cooling system of the new energy device 100 (for example, a solar power generation device).

[0077] In addition, the power supply system according to the third exemplary embodiment of the present application may further include: a booster pump 1600.

[0078] The booster pump 1600 is used to boost the liquid air output by the liquid air energy storage device 400 and then input it into at least one cold and heat power generation device 500 and the Stirling engine 801.

[0079] In addition, the power supply system according to the third exemplary embodiment of the present application may further include: an external power access device 1700.

[0080] The external power access device 1700 is used to access the electric energy in the external power grid to the substation 700 during the low electricity consumption period of the external power grid.

[0081] In addition, the power supply system according to the third exemplary embodiment of the present application may further include: a chemical energy storage device 1800.

[0082] The chemical energy storage device 1800 is used to store the electric energy obtained from the substation 700 and output electric energy to the substation 700 when the power supply system needs emergency power supply. For example, the chemical energy storage device 1800 can provide electric energy to the substation 700 when the external power grid urgently needs the power supply system to supply power, so that the substation 700 supplies power to the external power grid.

[0083] As an exemplary embodiment, the chemical energy storage device 1800 can output electric energy to the substation 700 via a chemical energy storage inverter power supply (not shown).

[0084] In addition, the artificial intelligence dispatching and management center 2000 can also monitor and control the states of the heat exchange device 1500, the booster pump 1600, the external power access device 1700, and the chemical energy storage device 1800.

[0085] According to the exemplary embodiments of the present disclosure, through the reasonable allocation and mutual complementation of multiple devices, the heat and waste heat generated during the power generation and storage processes are fully utilized, thereby improving the energy utilization rate and production efficiency of the entire system.

[0086] Those skilled in the art will readily think of other embodiments of the present application after considering the specification and practicing the invention disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the present application, which follow the general principles of the present application and include the common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the true scope and spirit of the present application are pointed out by the claims.

[0087] It should be understood that the present application is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present application is only limited by the appended claims.

Claims

1. A power supply system, characterized in that, Comprising: Multiple new energy devices, at least one new energy device for converting new energy into electric energy, and at least one new energy device for converting new energy into heat energy; A thermal energy storage device for storing the heat energy output by at least one new energy device; An air compression and liquefaction device for using the electric energy output by at least one new energy device and a substation to compress air and condense the compressed air into liquid air; A liquid air energy storage device for storing the liquid air output by the air compression and liquefaction device; At least one cold and heat energy power generation device, each cold and heat energy power generation device for simultaneously using heat energy and cold energy to generate electric energy and high-pressure air, the thermal energy storage device and at least one new energy device supplying heat energy to the at least one cold and heat energy power generation device, and the liquid air energy storage device outputting liquid air to the at least one cold and heat energy power generation device to provide cold energy; A Stirling engine for using the heat energy output by the thermal energy storage device and at least one new energy device, and the liquid air output by the liquid air energy storage device to generate kinetic energy and high-pressure air; A pneumatic generator set for using the high-pressure air output by the at least one cold and heat energy power generation device and the Stirling engine to generate electric energy; A pneumatic motor for using the high-pressure air output by the at least one cold and heat energy power generation device and the Stirling engine to generate kinetic energy; The substation for receiving the electric energy output by at least one new energy device, the at least one cold and heat energy power generation device, and the pneumatic generator set, and supplying electric energy to the air compression and liquefaction device and the external power grid; Wherein, the at least one cold and heat energy power generation device, the pneumatic generator set, the Stirling engine and the pneumatic motor are jointly applied to the air energy storage and thermal energy storage power generation scenarios of the power supply system.

2. The power supply system according to claim 1, characterized in that, Further comprising: A first water tower, a second water tower, a water turbine generator set, a water level control device, a water head control device, and a water head adjustment device; Wherein, the liquid flowing out of the second water tower respectively flows into the water turbine generator set and the water head adjustment device after the water head is controlled by the water head control device, and the liquid after the water head is adjusted by the water head adjustment device flows into the water turbine generator set; The water turbine generator set generates and outputs electric energy to the substation by using the liquid flowing into it, and the liquid discharged by the water turbine generator set is recovered to the first water tower via the water level control device; The first water tower supplies liquid to the second water tower and is used to provide liquid pressure buffering for the second water tower; The Stirling engine and the pneumatic motor are used to provide kinetic energy for the water head adjustment device and the water level control device.

3. The power supply system according to claim 2, characterized in that, Further comprising: An artificial intelligence dispatching and management center for monitoring and controlling the states of the multiple new energy devices, the thermal energy storage device, the air compression and liquefaction device, the liquid air energy storage device, the at least one cold and heat energy power generation device, the pneumatic generator set, the substation and the water head control device.

4. The power supply system according to claim 3, wherein, The artificial intelligence dispatching management center determines the power generation plan, power supply plan, and energy storage plan of the power supply system according to the power demand, electricity price, and available new energy situation of the external power grid; and controls the states of the multiple new energy devices, the thermal energy storage device, the air compression and liquefaction device, the liquid air energy storage device, the at least one cold and heat power generation device, the pneumatic generator set, the substation, and the water head control device according to the power generation plan, the power supply plan, and the energy storage plan.

5. The power supply system according to claim 1, characterized in that, It further includes: A heat exchange device, which is used to receive the hot water output by the air compression and liquefaction device, output cold water to the air compression and liquefaction device, and output thermal energy to the thermal energy storage device.

6. The power supply system according to claim 5, characterized in that, The cooling system of at least one new energy device outputs hot water to the heat exchange device, and the cooling system receives the cold water output by the heat exchange device.

7. The power supply system according to claim 1, characterized in that It further includes: A booster pump, which is used to boost the liquid air output by the liquid air energy storage device and input it into the at least one cold and heat power generation device and the Stirling engine.

8. The power supply system according to claim 1, characterized in that, The at least one cold and heat power generation device includes: a thermoelectric power generation device and a Stirling generator set.

9. The power supply system according to claim 1, characterized in that, The types of the multiple new energy devices include at least one of the following items: wind power generation device, ocean energy power generation device, geothermal energy power generation device, solar power generation device, biomass energy power generation device, solar heating device.

10. The power supply system according to claim 1, characterized in that, It further includes: An external power access device, which is used to access the electric energy in the external power grid to the substation during the low electricity consumption period of the external power grid.

11. The power supply system according to claim 1, characterized in that, It further includes: A chemical energy storage device, which is used to store the electric energy obtained from the substation and output electric energy to the substation when the power supply system needs emergency power supply.

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