Operation control method for multi-energy comprehensive utilization of distributed compressed air energy storage system

Abstract

The present invention discloses an operation control method for the multi-energy comprehensive utilization of a distributed compressed air energy storage system, comprising: calculating the heat collection information of the collector based on the radiation amount at the location of the compressed air storage system and the boundary conditions of the trough collector; determining the air inlet temperature adjustment trend of each stage of turbines on the turbine side according to the heat collection information, weather factors and the air temperature demand on the user side; calculating the throttling pressure and the air inlet temperature of each stage of turbines on the turbine side corresponding to the air temperature demand on the user side under different ambient temperatures based on the air inlet temperature adjustment trend of each stage of turbines on the turbine side; the present invention realizes the multi-energy utilization of the compressed air storage system, which is beneficial to improving the operation stability and comprehensive efficiency of the compressed air storage system.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system. Background Art

[0002] In order to adapt to the current diversified energy demand, distributed new energy has received much attention. Distributed new energy can be matched according to the energy needs of different regions and has greater flexibility. At the same time, the development of distributed compressed air energy storage technology also has a positive impact on power transmission and distribution.

[0003] Distributed renewable energy power generation is affected by multiple factors in the natural environment, resulting in intermittent and unstable power generation, which has a negative impact on power loads or power grids, limiting the large-scale promotion of distributed renewable energy systems. The key to solving this problem lies in overcoming the intermittent and instability of renewable energy system power generation. The current approach is mainly to provide distributed energy storage systems that are suitable for distributed renewable energy systems. Distributed energy storage technology is similar to large-scale centralized energy storage technology and can generally be divided into mechanical energy storage, physical energy storage, and chemical energy storage. Among them, compressed air energy storage technology in physical energy storage technology has attracted widespread attention because it can store electrical energy and convert it into cold energy and heat energy during operation, and can realize the diversified application of electrical energy.

[0004] The compression heat recovery value of the compression side in the distributed compressed air energy storage system (referred to as the compressed air storage system) is low, and the turbine side heat supply chooses external heating, among which the more economical heating method is to use trough collectors for heating. However, trough collectors are easily affected by the daily radiation amount of the system location, causing the collector temperature to fluctuate, affecting the turbine power generation of the compressed air storage system, and then affecting the electricity-to-electricity conversion efficiency of the compressed air storage system. At the same time, the change in the collector temperature also has a direct impact on the exhaust temperature of the turbine link.

[0005] In the related art, the patent application document with publication number CN109826708A discloses an advanced distributed multi-generation compressed air energy storage system and application method. According to the user's seasonal load requirements, the turbine inlet temperature in the compressed air energy storage system is adjusted, and the system can provide users with cold, hot and electric loads in different seasons. However, the system heating heat in this solution is provided by the fuel chamber, and its essence is the utilization of high-grade heat sources. The patent application document with publication number CN117494999A discloses a distributed compressed air energy storage system design method. The solution proposes to calculate and obtain the daily heat collection and heat collection temperature of the distributed compressed air energy storage system according to the environmental conditions of different regions, which is used to optimize the design of the gas storage volume in the compressed air storage system, thereby designing a compressed air storage system suitable for different regions. Therefore, the core of this solution lies in the design of the distributed compressed air energy storage system and the determination of various boundary conditions of the system. Summary of the invention

[0006] The technical problem to be solved by the present invention is how to improve the comprehensive operation efficiency and operation value of the pressure storage system.

[0007] The present invention solves the above technical problems by the following technical means:

[0008] An operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system is proposed, and the method comprises:

[0009] Based on the irradiation at the location of the pressure storage system and the boundary conditions of the trough collector, the heat collection information of the collector is calculated;

[0010] Determine the air inlet temperature adjustment trend of each level of turbines on the turbine side according to the heat collection information, weather factors and the air temperature demand on the user side;

[0011] Based on the air inlet temperature adjustment trend of each stage of turbines on the turbine side, the throttling pressure and the air inlet temperature of each stage of turbines on the turbine side corresponding to the air temperature demand on the user side under different ambient temperatures are calculated.

[0012] Furthermore, the heat collection information includes heat collection amount and heat collection temperature.

[0013] Further, the air inlet temperature adjustment trend of each level of turbines on the turbine side is determined according to the heat collection information, weather factors and the air temperature demand of the user side, including:

[0014] When the amount of collected heat remains unchanged and the air temperature requirement on the user side changes, the air inlet temperature of the final stage turbine is controlled to adjust the air outlet temperature of the final stage turbine to meet the air temperature requirement on the user side, and the unused heat of the final stage turbine is used to heat the inlet air of the first stage turbine;

[0015] When the heat collection increases and the air temperature requirement on the user side is the same as the system design condition, the excess heat is consumed by adjusting the inlet air temperature of the first-stage turbine;

[0016] When the collected heat decreases and the air temperature requirement on the user side is the same as the system design condition, the heat supply required by the turbine system is reduced by adjusting the inlet air temperature of the first-stage turbine.

[0017] Furthermore, the regulation relationship between the air inlet temperature of the last stage turbine and the air outlet temperature of the last stage turbine is:

[0018]

[0019]

[0020] In the formula, is the air outlet temperature of the final turbine stage, is the air inlet temperature of the final turbine stage, is the expansion ratio of the last stage turbine on the turbine side, is the air adiabatic index, is the isentropic efficiency of the final turbine stage, For environmental pressure, is the inlet air pressure of the final turbine stage.

[0021] Furthermore, the relationship between the heat collection amount, the throttling pressure and the air inlet temperature of each stage of the turbine on the turbine side is:

[0022]

[0023]

[0024]

[0025] In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the gas constant of air, is the air flow rate, For the The air inlet temperature of the turbine stage, , Turbine side The expansion ratio of the turbine, is the air adiabatic index, To throttle pressure, For environmental pressure, The daily heat collection at the location of the pressure storage system, is the air turbine time, For the i The air outlet of the heat exchanger is high temperature. For the The air outlet of the heat exchanger is low temperature. is the specific heat of air at constant pressure.

[0026] Furthermore, the method further comprises:

[0027] Calculate the comprehensive energy efficiency of the pressure storage system based on the heating / cooling energy, power generation and power consumption of the pressure storage system for:

[0028]

[0029] In the formula, To consume electrical energy, Provides heating / cooling energy for the pressure storage system, For power generation.

[0030] Furthermore, the compressed air heating / cooling energy The calculation formula is:

[0031]

[0032] In the formula, is the total mass of air used for cooling or heating, is the specific heat capacity of air at constant pressure, is the air outlet temperature of the final turbine stage, is the ambient temperature.

[0033] Furthermore, the power consumption of the pressure storage system The calculation formula is:

[0034]

[0035] In the formula, To compress the running time of the link, is the specific heat capacity of air at constant pressure, is the compression level, For the Stage compressor air inlet temperature, is the compressor air flow, is the isentropic efficiency of the compressor, For the Stage compressor pressure ratio, For the The mechanical efficiency of the compressor, Represents the air adiabatic index.

[0036] Furthermore, the power generation The calculation formula is:

[0037]

[0038] In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the air turbine time.

[0039] Further, the air outlet temperature of the final turbine is increased or decreased by 8-20° C. based on the heating / cooling demand of the user side and the current ambient temperature. The method further includes:

[0040] Calculate the comprehensive energy efficiency corresponding to each temperature within the air outlet temperature range of the final stage turbine;

[0041] The operation of the pressure storage system is controlled according to the boundary conditions corresponding to the highest comprehensive energy utilization efficiency.

[0042] The advantages of the present invention are:

[0043] (1) The present invention comprehensively considers the uncertainty of the collector being affected by environmental weather factors, the changes in the heating / cooling demand on the user side, and other factors. According to the throttling pressure corresponding to the air temperature demand on the user side and the air inlet temperature of each level of turbine on the turbine side under different ambient temperatures, the air inlet temperature and throttling pressure of the throttle valve and some turbines are adjusted. This is beneficial to improving the operating stability and comprehensive efficiency of the pressure storage system and realizing the multi-energy utilization of the pressure storage system. It is also beneficial to improving the response of the pressure storage system to the user's load demand, alleviating the impact of changes in natural environmental factors on the distributed compressed air energy storage system to a certain extent, and promoting the development of distributed compressed air energy storage systems.

[0044] (2) It can be used in conjunction with distributed photovoltaic systems, which is conducive to reducing the intermittent nature of the distributed photovoltaic system's electricity, promoting the vigorous development of distributed new energy, and helping to increase the proportion of new energy electricity in the power system.

[0045] 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

[0046] Figure 1 is a structural schematic diagram of a distributed compressed air energy storage system in one embodiment of the present invention;

[0047] Figure 2 It is a flow chart of an operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system proposed in one embodiment of the present invention. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0049] like Figure 1As shown, the distributed compressed air energy storage system includes a multi-stage compressor, a trough collector and a multi-stage turbine. A heat exchanger is arranged between each stage of the compressor, and a heat exchanger is arranged between each stage of the turbine. The heat collected by the trough collector is stored in a high-temperature heat storage tank and a low-temperature heat storage tank. The high-temperature heat storage tank and the low-temperature heat storage tank are respectively connected to the heat exchangers between each stage of the turbine. The heat exchanger connected to the last stage compressor is connected to one end of the gas storage reservoir, and the other end of the gas storage reservoir is connected to the first-stage turbine through a throttle valve and a heat exchanger. The outlet air of the last-stage turbine is used to realize cooling / heating on the user side.

[0050] The operation of the distributed compressed air energy storage system is to drive the multi-stage compressor to work by utilizing the electric energy of the power grid or distributed new energy to generate high-temperature and high-pressure air. The high temperature of the compressed air is dissipated to the environment through the heat exchanger, and the low-temperature and high-pressure air is stored in the gas storage reservoir. The solar collector collects heat and stores it in the heat storage tank. The turbine system adjusts the throttling pressure and the turbine air inlet temperature according to the heat collected by the collector and the indoor cooling / heating demand, and performs turbine power generation according to the optimization control result. During the turbine process, the gas released from the gas storage enters the turbine system after throttling and heating to a certain pressure and temperature. The high-temperature and high-pressure gas drives the turbine to work, outputs electric energy, and then outputs low-temperature and low-pressure gas. The upper-stage turbine provides pressurized gas for the lower-stage turbine. At the same time, the heat in the heat storage tank is also used between the turbine stages to reheat the air to the regulated temperature to ensure the power generation and heating / refrigeration capacity of the compressed storage system. That is to say, different from the method of providing heat through the fuel chamber, the present invention provides heat by exhausting the turbine side, which is the utilization of low-grade heat sources, and designs a set of control methods for turbine systems with different cooling, heating and power supply requirements.

[0051] The purpose of this embodiment is to take the heat collected by the collector as a variable, comprehensively consider the power generation demand and the heating / cooling demand on the user side, and perform sliding pressure control on the turbine link to meet the electricity, heat and cooling needs of the user side as much as possible, so as to realize the multi-energy utilization of the pressure storage system and improve the operation stability and comprehensive efficiency of the pressure storage system. To this end, this embodiment proposes an operation control method for the multi-energy comprehensive utilization of a distributed compressed air energy storage system, and the method includes the following steps:

[0052] S10, calculating the heat collection information of the collector based on the radiation amount at the location of the pressure storage system and the boundary conditions of the trough collector;

[0053] S20, determining the air inlet temperature adjustment trend of each level of turbines on the turbine side according to the heat collection information, weather factors and the air temperature demand of the user side;

[0054] S30. Based on the air inlet temperature adjustment trend of each stage of turbines on the turbine side, calculate the throttling pressure and the air inlet temperature of each stage of turbines on the turbine side corresponding to the air temperature demand on the user side under different ambient temperatures.

[0055] Specifically, since the trough collector is easily affected by the daily radiation at the system location, the collector's collection temperature fluctuates. Taking into account the uncertainty of the collector being affected by environmental weather factors, changes in user-side heating / cooling demand and other factors, the throttling pressure corresponding to the air temperature demand on the user side and the air inlet temperature of each stage of turbines on the turbine side under different ambient temperatures are used to adjust the air inlet temperature and throttling pressure of the throttle valve and some turbines. This is beneficial to improving the operating stability and comprehensive efficiency of the pressure storage system and realizing the multi-energy utilization of the pressure storage system; it is beneficial to improving the response of the pressure storage system to user load demand, alleviating the impact of changes in natural environmental factors on distributed compressed air energy storage systems to a certain extent, and is beneficial to promoting the development of distributed compressed air energy storage systems.

[0056] As a further preferred technical solution, the heat collection information includes the heat collection amount and the heat collection temperature. The step S10: based on the irradiation at the location of the pressure storage system and the boundary conditions of the trough collector, the heat collection information of the collector is calculated, specifically including:

[0057] Daily heat collection Q at the location of the pressure storage system s and collector temperature T oil-H The calculation formula is:

[0058]

[0059]

[0060] In the formula, A is the collecting area of ​​the trough collector, DNI is the normal direct radiation value, θ is the solar altitude angle, η is the trough collector heat collection efficiency, t s is the effective solar radiation time, m oil is the quality of the thermal oil, T oil-L For thermal oil low temperature, c p oil is the specific heat capacity of the thermal oil at constant pressure.

[0061] As a further preferred technical solution, the step S20: determining the air inlet temperature adjustment trend of each level of turbines on the turbine side according to the heat collection information, weather factors and the air temperature demand on the user side, includes:

[0062] When the amount of collected heat remains unchanged and the air temperature requirement on the user side changes, the air inlet temperature of the final stage turbine is controlled to adjust the air outlet temperature of the final stage turbine to meet the air temperature requirement on the user side, and the unused heat of the final stage turbine is used to heat the inlet air of the first stage turbine;

[0063] When the heat collection increases and the air temperature requirement on the user side is the same as the system design condition, the excess heat is consumed by adjusting the inlet air temperature of the first-stage turbine;

[0064] When the collected heat decreases and the air temperature requirement on the user side is the same as the system design condition, the heat supply required by the turbine system is reduced by adjusting the inlet air temperature of the first-stage turbine.

[0065] It should be noted that during the regulation process, the purpose of regulation is achieved mainly by adjusting the temperature / expansion ratio of the first-stage turbine and the last-stage turbine, and the inlet temperature of the intermediate-stage turbine remains unchanged.

[0066] As a further preferred technical solution, this embodiment uses the air outlet temperature of the final turbine to perform indoor heating / cooling, and the air outlet temperature of the final turbine is adjusted by controlling the air inlet temperature of the final turbine, wherein the expansion ratio of the final turbine and the air inlet pressure are fixed, and the control relationship between the air inlet temperature of the final turbine and the air outlet temperature of the final turbine is:

[0067]

[0068]

[0069] In the formula, is the air outlet temperature of the final turbine stage, is the air inlet temperature of the final turbine stage, is the expansion ratio of the last stage turbine on the turbine side, is the air adiabatic index, is the isentropic efficiency of the final turbine stage, is the environmental pressure, is the inlet air pressure of the final turbine stage.

[0070] It should be noted that the air inlet temperature of the last stage turbine increases. Under the same expansion ratio, the exhaust temperature of the turbine increases. The calculation formula is inferred.

[0071] As a further preferred technical solution, the influence of throttling pressure on each turbine in the turbine system mainly affects the expansion ratio of the first-stage turbine, that is, when the throttling pressure increases, the expansion ratio of the first-stage turbine increases to ensure that its exhaust pressure remains unchanged; when the throttling pressure decreases, the opposite is true. The relationship between the heat collection amount and the throttling pressure and the air inlet temperature of each stage of the turbine on the turbine side is:

[0072]

[0073]

[0074]

[0075] In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the gas constant of air, is the air flow rate, For the The air inlet temperature of the turbine stage, , Turbine side The expansion ratio of the turbine, is the air adiabatic index, To throttle pressure, For environmental pressure, The daily heat collection at the location of the pressure storage system, is the air turbine time, For the i The air outlet of the heat exchanger is high temperature. For the The air outlet of the heat exchanger is low temperature. is the specific heat of air at constant pressure.

[0076] This embodiment controls the expansion ratio and the air inlet temperature by limiting multiple boundary conditions (power generation power, pressure, and heat), thereby achieving the purpose of regulation.

[0077] It should be noted that this embodiment does not consider the pressure loss of the heat exchanger and pipeline in the turbine process. The regulation of the turbine link mainly affects , and .

[0078] As a further preferred technical solution, the method further comprises the following steps:

[0079] Calculate the comprehensive energy efficiency of the pressure storage system based on the heating / cooling energy, power generation and power consumption of the pressure storage system for:

[0080]

[0081] In the formula, To consume electrical energy, For compressed heating / cooling energy storage system, For power generation.

[0082] The compressed air heating / cooling energy The calculation formula is:

[0083]

[0084] In the formula, is the total mass of air used for cooling or heating, is the specific heat capacity of air at constant pressure, is the air outlet temperature of the final turbine stage, is the ambient temperature.

[0085] Among them, the power consumption of the pressure storage system The calculation formula is:

[0086]

[0087] In the formula, To compress the running time of the link, is the specific heat capacity of air at constant pressure, is the compression level, For the Stage compressor air inlet temperature, is the compressor air flow, is the isentropic efficiency of the compressor, For the Stage compressor pressure ratio, For the The mechanical efficiency of the compressor, Represents the air adiabatic index.

[0088] Among them, the power generation The calculation formula is:

[0089]

[0090] In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the air turbine time.

[0091] As a further preferred technical solution, the air outlet temperature of the final turbine is increased or decreased by 8-20°C based on the heating / cooling demand of the user side and the current ambient temperature. The method further includes the following steps:

[0092] Calculate the comprehensive energy efficiency corresponding to each temperature within the air outlet temperature range of the final stage turbine;

[0093] The operation of the pressure storage system is controlled according to the boundary conditions corresponding to the highest comprehensive energy utilization efficiency.

[0094] It should be noted that the cooling / heating air exhaust temperature is a range, and different heating / cooling temperatures have different efficiencies. This embodiment calculates the corresponding heating / cooling energy for each temperature within the air outlet temperature range of the final turbine, thereby calculating the different comprehensive energy utilization efficiencies within the temperature range, selecting the highest comprehensive energy utilization efficiency, and operating the pressure storage system according to the boundary conditions when the highest comprehensive efficiency is selected.

[0095] Furthermore, this embodiment can be used in conjunction with a distributed photovoltaic system to utilize the electric energy of the power grid or distributed new energy to drive the multi-stage compressor, which is beneficial to weaken the intermittent nature of the electric energy of the distributed photovoltaic system, promote the vigorous development of distributed new energy, and help increase the proportion of new energy electric energy in the electric energy system.

[0096] In the description of this specification, the description with reference to the terms "one embodiment", "some 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.

[0097] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0098] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. An operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system, characterized in that: The method comprises: Based on the irradiation at the location of the pressure storage system and the boundary conditions of the trough collector, the heat collection information of the collector is calculated; According to the heat collection information, weather factors and the air temperature demand on the user side, the air inlet temperature adjustment trend of each turbine on the turbine side is determined, including: when the heat collection amount remains unchanged and the air temperature demand on the user side changes, the air inlet temperature of the last-stage turbine is controlled to adjust the air outlet temperature of the last-stage turbine to meet the air temperature demand on the user side, and the unused heat of the last-stage turbine is used to heat the inlet air of the first-stage turbine; when the heat collection amount increases and the air temperature demand on the user side is the same as the system design condition, the excess heat is consumed by adjusting the inlet air temperature of the first-stage turbine; when the heat collection amount decreases and the air temperature demand on the user side is the same as the system design condition, the heat supply required by the turbine system is reduced by adjusting the inlet air temperature of the first-stage turbine; Based on the air inlet temperature adjustment trend of each stage of turbines on the turbine side, the throttling pressure and the air inlet temperature of each stage of turbines on the turbine side corresponding to the air temperature demand on the user side under different ambient temperatures are calculated.

2. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 1, characterized in that: The heat collection information includes the heat collection amount and the heat collection temperature.

3. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 1, characterized in that: The regulation relationship between the air inlet temperature of the last stage turbine and the air outlet temperature of the last stage turbine is: In the formula, is the air outlet temperature of the final turbine stage, is the air inlet temperature of the final turbine stage, is the expansion ratio of the last stage turbine on the turbine side, is the air adiabatic index, is the isentropic efficiency of the final turbine stage, For environmental pressure, is the inlet air pressure of the final turbine stage.

4. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 1, characterized in that: The relationship between the heat collection amount, the throttling pressure and the air inlet temperature of each stage of the turbine on the turbine side is: In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the air gas constant, is the air flow rate, For the The air inlet temperature of the turbine stage, , Turbine side The expansion ratio of the turbine, is the air adiabatic index, To throttle pressure, For environmental pressure, The daily heat collection at the location of the pressure storage system, is the air turbine time, For the i The air outlet of the heat exchanger is high temperature. For the The air outlet of the heat exchanger is low temperature. is the specific heat of air at constant pressure.

5. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 1, characterized in that: The method further comprises: Calculate the comprehensive energy efficiency of the pressure storage system based on the heating / cooling energy, power generation and power consumption of the pressure storage system for: In the formula, To consume electrical energy, Provides heating / cooling energy for the pressure storage system, For power generation.

6. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 5, characterized in that: The compressed air heating / cooling energy The calculation formula is: In the formula, is the total mass of air used for cooling or heating, is the specific heat capacity of air at constant pressure, is the air outlet temperature of the final turbine stage, is the ambient temperature.

7. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 5, characterized in that: Power consumption of pressure storage system The calculation formula is: In the formula, To compress the running time of the link, is the specific heat capacity of air at constant pressure, is the compression level, For the Stage compressor air inlet temperature, is the compressor air flow, is the isentropic efficiency of the compressor, For the Stage compressor pressure ratio, For the The mechanical efficiency of the compressor, Represents the air adiabatic index.

8. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 5, characterized in that: The power generation The calculation formula is: In the formula, Design the power generation capacity for the turbine side. m is the turbine stage number, is the air turbine time.

9. The operation control method for multi-energy comprehensive utilization of a distributed compressed air energy storage system according to claim 5, characterized in that: The air outlet temperature of the final turbine is increased or decreased by 8-20°C based on the heating / cooling demand of the user side and the current ambient temperature. The method further includes: Calculate the comprehensive energy efficiency corresponding to each temperature within the air outlet temperature range of the final stage turbine; The operation of the pressure storage system is controlled according to the boundary conditions corresponding to the highest comprehensive energy utilization efficiency.

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