Cooperative operation method and system for coupling coal-fired unit with compressed air energy storage system

Abstract

The invention discloses a coal-fired unit coupling compressed air energy storage cooperative operation method and system, and belongs to the technical field of coal-fired power generation. According to the characteristic that the heat supply amount is obviously changed by the environment temperature in resident heat supply, the heat supply amount of the coal-fired unit is supplemented through compression heat generated by the compressed air energy storage system in the charging period, and the situation that the coal-fired unit is deficit in the low-electricity-price period is reduced; in the high electricity price period, the medium-pressure cylinder extracts steam, the heat storage amount of the compressed air energy storage system is supplemented, and it is guaranteed that the high-pressure air temperature of an expansion machine inlet of the compressed air energy storage system is a design value; aiming at the characteristic that the heat supply amount is relatively stable in industrial heat supply, in the low-electricity-price stage, the steam production amount of a unit is increased, and exhaust gas of an intermediate-pressure cylinder of a steam turbine is extracted to heat high-pressure water; in the high electricity price stage, the heat stored in the high-pressure water is used for heating condensed water of the coal-fired unit, and the generating capacity of the coal-fired unit is improved and the unit income is improved by squeezing the air suction rate of the steam turbine.

Description

Technical Field

[0001] The present invention relates to the technical field of coal-fired power generation, and in particular to a method and system for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system. Background Art

[0002] Coal-fired cogeneration units usually operate in a "heat-to-electricity" mode. When coal-fired cogeneration units participate in electricity spot transactions, in order to meet the heating needs of residents, the load of the coal-fired units is at a high level, resulting in large electricity trading losses. In industrial heating, due to the relatively stable heating demand and large adjustment space for electricity load, after coal-fired units participate in electricity spot transactions, the peak-shaving capacity and economic benefits of coal-fired units are unstable. The coupling of energy storage systems with coal-fired units is considered to be a technical solution that can improve the flexibility of coal-fired units. Among them, compressed air energy storage has its own heat storage device, which can be coupled with coal-fired units. On the premise of ensuring heating needs, it will improve the heating flexibility of coal-fired units and reduce losses in electricity spot market transactions.

[0003] The power generation load of coal-fired units is affected by the grid dispatch, and the electric load is often in a state of change. The heating load of coal-fired units is affected by the ambient temperature and is in a state of change. At the same time, in the electricity spot trading market, the electricity price changes in real time. Therefore, when the electric load, thermal load, and electricity price change at the same time, it is urgent to formulate a suitable active control strategy for coal-fired units coupled with compressed air energy storage systems to obtain the optimal economic operation strategy under different thermal power loads and electricity prices. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a method and system for the coordinated operation of a coal-fired unit coupled with a compressed air energy storage system, which can improve the heating flexibility of the coal-fired unit and reduce losses in electricity spot market transactions.

[0005] To achieve the above object, the present invention is implemented by adopting the following technical solutions: On the one hand, the present invention provides a method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system, comprising: Obtain real-time power clearing curves, real-time dispatch node prices, and heating load forecast curves in the power spot trading market; According to the power clearing curve, the real-time power load of the coal-fired unit is obtained; according to the real-time dispatching node price, the real-time electricity price of the coal-fired unit is obtained; according to the heating load prediction curve, the real-time heating demand of residents and the real-time heating demand of industry are obtained; If the current scenario is a residential heating scenario and the real-time electricity price is in a low-price period, based on the maximum heating amount under the real-time power load and the real-time heating demand of the residents, the heat in the high-pressure water of the compressed air energy storage system is controlled to provide heating to the residents; If the current scenario is residential heating and the real-time electricity price is in a high-price period, the exhaust heat of the intermediate-pressure cylinders of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system while meeting the real-time heating needs of the residents; If the current scenario is an industrial heating scenario and the real-time electricity price is in a low-price period, the heat of the medium-pressure exhaust gas of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system while meeting the real-time industrial heating demand; If the current scenario is an industrial heating scenario and the real-time electricity price is in a high electricity price period, the heat in the high-pressure water of the compressed air energy storage system is controlled to be exchanged to the coal-fired unit, and the coal-fired unit is controlled to provide heating for the industry.

[0006] Optionally, according to the maximum heating amount under the real-time power load and the real-time heating demand of the residents, the heat in the high-pressure water of a part of the compressed air energy storage system is controlled to provide heating to the residents, including: The maximum heating supply under the real-time power load is less than the real-time heating demand of the residents. The compressed air energy storage system is charged to release heat, and the remaining real-time heating demand of the residents is provided to the residents by controlling the heat in the high-pressure water of the compressed air energy storage system.

[0007] Optionally, while meeting the real-time heating needs of residents, the exhaust heat of the intermediate pressure cylinders of some coal-fired units is controlled to supplement the heat of the high-pressure water of the compressed air energy storage system, including: The maximum heating capacity under the real-time power load is greater than the real-time heating demand of the residents. The compressed air energy storage system discharges to absorb heat and controls the remaining maximum heating capacity under the real-time power load after the real-time heating demand of the residents is met to supplement the heat for the high-pressure water of the compressed air energy storage system.

[0008] Optionally, under the condition of meeting the real-time industrial heating demand, the heat of medium-pressure exhaust gas of some coal-fired units is controlled to supplement the heat of high-pressure water of the compressed air energy storage system, including: The maximum heating capacity under the real-time power load is greater than the real-time industrial heating demand. The remaining maximum heating capacity under the real-time power load after the real-time industrial heating demand is met is controlled to supplement the heat for the high-pressure water of the compressed air energy storage system.

[0009] Optionally, the heat in the high-pressure water of the compressed air energy storage system is controlled to be exchanged to the coal-fired unit, and the coal-fired unit is used to provide heat to the industry, including: Control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, heat the condensate of the coal-fired unit, and control the coal-fired unit to provide heating for industry.

[0010] Optionally, while meeting the real-time heating needs of residents, the exhaust heat of the intermediate pressure cylinders of some coal-fired units is controlled to supplement the heat of the high-pressure water of the compressed air energy storage system, including: When the heat absorbed by the high-pressure water of the compressed air energy storage system is equal to the heat released by the high-pressure water of the compressed air energy storage system, the heating of the high-pressure water of the compressed air energy storage system is stopped.

[0011] In a second aspect, the present invention provides a coordinated operation system of a coal-fired unit coupled with a compressed air energy storage system, comprising: Data acquisition module, used to obtain real-time power clearing curves, real-time dispatch node prices, and heating load forecast curves in the power spot trading market; According to the power clearing curve, the real-time power load of the coal-fired unit is obtained; according to the real-time dispatching node price, the real-time electricity price of the coal-fired unit is obtained; according to the heating load prediction curve, the real-time heating demand of residents and the real-time heating demand of industry are obtained; The residential heating module is used to: if the current scene is a residential heating scene and the real-time electricity price is in a low-price period, control the heat in the high-pressure water of part of the compressed air energy storage system to provide heating to the residents according to the maximum heating supply under the real-time power load and the real-time heating demand of the residents; The high-pressure water heating module is used to: if the current scenario is a residential heating scenario and the real-time electricity price is in a high-price period, control the exhaust heat of the medium-pressure cylinder of some coal-fired units to heat the high-pressure water of the compressed air energy storage system while meeting the real-time heating demand of the residents; If the current scenario is an industrial heating scenario and the real-time electricity price is in a low-price period, the heat of the medium-pressure exhaust gas of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system while meeting the real-time industrial heating demand; The industrial heating module is used to: if the current scene is an industrial heating scene and the real-time electricity price is in a high electricity price period, control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, and control the coal-fired unit to provide heating for the industry.

[0012] In a third aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, which, when executed by a processor, implement the steps of the method described in the first aspect.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The present invention is aimed at residential heating, and its heat supply is significantly affected by changes in ambient temperature. The compressed heat generated by the compressed air energy storage system during the charging period is used to supplement the heat supply of the coal-fired unit, thereby reducing the power generation load of the coal-fired unit during the period of low electricity spot prices, thereby reducing the power generation output of the coal-fired unit during the period of low electricity prices, and reducing the loss of the coal-fired unit during the period of low electricity prices. In the period of high electricity prices, steam is extracted from the medium-pressure cylinder to supplement the heat storage of the compressed air energy storage system, ensuring that the high-pressure air temperature at the inlet of the expander of the compressed air energy storage system is the design value; for industrial heating, its heat supply is relatively stable, and in the period of low electricity prices, During the period, on the basis of meeting the industrial heating demand, the steam output of the unit is increased, and the exhaust steam from the intermediate-pressure cylinder of the steam turbine is used to heat the high-pressure water. In the stage of high electricity prices, the heat stored in the high-pressure water is used to heat the condensate of the coal-fired unit, and the power generation of the coal-fired unit is increased by displacing the exhaust volume of the steam turbine. The peak-shaving capacity and economic benefits of the coal-fired unit are improved through energy transfer in different time periods. According to the daily heat load demand, electricity load demand, electricity spot price and heating type, the compressed air energy storage compression heat is reasonably allocated, and the optimal operation strategy for the power load economy of the coal-fired unit is obtained while considering the electricity spot price. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic flow chart of a method for cooperative operation of a coal-fired unit coupled with a compressed air energy storage system in one embodiment of the present invention; Figure 2 It is a schematic flow chart of another embodiment of the method for cooperative operation of a coal-fired unit coupled with a compressed air energy storage system according to the present invention; Figure 3 The figure shows a curve diagram of the variation of the power generation of the coal-fired unit before and after coupling in a certain month of the residential heating season in one embodiment of the present invention; Figure 4 Shown is a schematic diagram of a curve showing changes in the net income of a coal-fired unit before and after coupling in a certain month during the residential heating season in an embodiment of the present invention.

[0015] Figure 5 Shown is a schematic diagram of a curve showing changes in the power generation of a coal-fired unit before and after coupling in a certain month during the industrial heating season of the present invention in one embodiment.

[0016] Figure 6 Shown is a schematic diagram of a curve showing changes in the net income of a coal-fired unit before and after coupling in a certain month during an industrial heating season in an embodiment of the present invention. DETAILED DESCRIPTION

[0017] The technical solution of the present invention is described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations on the technical solution of the present invention. The embodiments of the present invention and the technical features in the embodiments may be combined with each other unless there is a conflict.

[0018] The term "and / or" is only a description of the association relationship between related objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " generally indicates that the related objects are in an "or" relationship.

[0019] Example 1

[0020] like Figure 1 As shown, this embodiment introduces a method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system. For residential heating, the heating amount is significantly affected by changes in ambient temperature. The power generation load of the coal-fired unit is affected by the grid dispatch, and the electric load is often in a changing state. The heating load of the coal-fired unit is in a changing state due to the influence of the ambient temperature. At the same time, in the electricity spot trading market, the electricity price changes in real time. When the electric load, thermal load, and electricity price change simultaneously, a suitable active control strategy for the coal-fired unit coupled with a compressed air energy storage system is formulated to obtain the optimal economic operation strategy under different thermal power loads and electricity prices.

[0021] The method specifically comprises the following steps: Step 1: Obtain the real-time power clearing curve, real-time dispatch node price, and heating load forecast curve, specifically: Real-time power dispatch clearing curves and real-time dispatch node prices are obtained from the power spot trading market, and the heating load forecast curve is calculated based on meteorological changes.

[0022] The real-time power dispatch clearing curve can obtain the real-time power load demand of coal-fired units; the real-time dispatch node price can obtain the real-time electricity price of coal-fired units based on the electricity spot market; the heating load forecast curve can obtain the real-time heating demand of residents. The above load curves and real-time electricity prices are used to optimize the real-time operation strategy of the subsequent coal-fired units coupled with the compressed air energy storage system, so as to provide a basis for improving the economic benefits of the coal-fired units coupled with the compressed air energy storage system.

[0023] Step 2: Establish a full operating system for a coal-fired power plant, that is, establish a boiler model, a steam turbine model, and a heating model respectively; establish a compressed air energy storage system, that is, establish a compressor model, an expander model, a high-pressure water heat storage and release model, and a gas storage model respectively.

[0024] The boiler model is used to transfer the flue gas heat generated by fuel combustion to water / steam through the boiler heat exchange surface; The steam turbine model is used to convert the kinetic energy of high-temperature and high-pressure steam generated after heat exchange in the boiler into mechanical energy of the steam turbine rotor, thereby driving the generator to generate electrical energy; The heating model is used to provide heat to the heat source to be supplied. For example, when heating residents, the heating model transfers the exhaust heat of the intermediate pressure cylinder of the steam turbine to the heating network to provide heating to the residents. The compressor model is used to compress air at normal temperature and pressure into air at high temperature and high pressure, and convert the electrical energy generated by the generator into heat energy and pressure energy of the air; The expander model is used to convert the kinetic energy and thermal energy of the high-temperature and high-pressure air into the mechanical energy of the expander rotor; The high-pressure water heat storage and heat release model is used to place high-pressure water in the compressed air energy storage system and store the compression heat during the compression process of the compressor; The air storage model is used to store the high-pressure air compressed by the compressor.

[0025] Step 3: Charging the compressed air energy storage system: When the real-time electricity price is at a low price, the coal-fired unit generates a higher amount of electricity to meet the heat demand, which causes the economic efficiency of the coal-fired unit to decline.

[0026] When the real-time electricity price is low, the compressed air energy storage system begins to enter the charging stage. Electric energy drives the compressor to compress the air. The compression process generates a large amount of heat, which is stored in high-pressure hot water. The maximum heat supply under the real-time power load is less than the real-time heating demand of residents. The compressed air energy storage system charges and releases heat. The remaining real-time heating demand of residents is heated by controlling the heat in the high-pressure water of the compressed air energy storage system.

[0027] After coupling the coal-fired unit with the compressed air energy storage system, steam is extracted from the coal-fired unit and the heat is stored in the high-pressure water of the compressed air energy storage system. The heat of the high-pressure water replaces part of the heating supply of the coal-fired unit. Under the condition of meeting the heating demand, the power generation load of the coal-fired unit in the period of low electricity spot price is reduced, thereby reducing the power generation output of the coal-fired unit in the period of low electricity price, reducing the loss of the coal-fired unit in the period of low electricity price, and improving the economy of the coal-fired unit.

[0028] After coupling the coal-fired units with the compressed air energy storage system, the heating supply, power generation and heat storage can be reasonably arranged based on the real-time power load, the real-time heating demand of residents and the real-time electricity price, which can improve the economic benefits of the coal-fired units during the low electricity price period.

[0029] Step 4: The compressed air energy storage system is not charged: To ensure that the air temperature at the inlet of the compressed air energy storage system expander is the design temperature, when the real-time electricity price is in a high electricity price period, the coal-fired unit needs to supplement heat to the compressed air energy storage system. The maximum heating capacity under the real-time power load is greater than the real-time heating demand of the residents. The compressed air energy storage system discharges to absorb heat, and controls the remaining maximum heating capacity under the real-time power load after meeting the real-time heating demand of the residents to supplement the high-pressure water of the compressed air energy storage system.

[0030] During the discharge period of the compressed air energy storage system, when the heat absorbed by the high-pressure water of the compressed air energy storage system is equal to the heat released by the high-pressure water of the compressed air energy storage system, the heating of the high-pressure water of the compressed air energy storage system is stopped.

[0031] This embodiment utilizes the high-pressure water part of the coal-fired unit coupled with the compressed air energy storage system to obtain the optimal economic control strategy for the coal-fired unit coupled with the compressed air energy storage system under different thermal power loads and electricity price changes during the heating season, thereby reducing the loss of coal-fired units in the low electricity price stage.

[0032] Example 2

[0033] like Figure 2 As shown, this embodiment introduces a method for the coordinated operation of a coal-fired unit coupled with a compressed air energy storage system. For industrial heating, the heat supply is relatively stable, and the electric load adjustment space is large. After the coal-fired unit participates in the spot electricity transaction, the peak load regulation capacity and economic benefits of the coal-fired unit are improved through energy transfer in different time periods. According to the real-time power clearing curve and the real-time dispatch node price, the electric load is adjusted in real time while meeting the industrial heat demand, and a suitable active control strategy for the coal-fired unit coupled with the compressed air energy storage system is formulated to obtain the optimal economic operation strategy.

[0034] The method specifically comprises the following steps: Step 1: Obtain the real-time power clearing curve, real-time dispatch node price, and heating load forecast curve, specifically: Obtain real-time power dispatch clearing curves and real-time dispatch node prices from the power spot trading market, as well as industrial heating load curves.

[0035] The real-time power dispatch clearing curve can obtain the real-time power load demand of coal-fired units; the real-time dispatch node price can obtain the real-time electricity price of coal-fired units based on the electricity spot market; the industrial heating load curve can obtain the real-time industrial heating demand. The above load curves and real-time electricity prices are used to optimize the real-time operation strategy of the subsequent coal-fired units coupled with the compressed air energy storage system, so as to provide a basis for improving the economic benefits of the coal-fired units coupled with the compressed air energy storage system.

[0036] Step 2: Establish a full operating system for a coal-fired power plant, that is, establish a boiler model, a steam turbine model, and a heating model respectively; establish a compressed air energy storage system, that is, establish a compressor model, an expander model, a high-pressure water heat storage and release model, and a gas storage model respectively.

[0037] The boiler model is used to transfer the flue gas heat generated by fuel combustion to water / steam through the boiler heat exchange surface; The steam turbine model is used to convert the kinetic energy of high-temperature and high-pressure steam generated after heat exchange in the boiler into mechanical energy of the steam turbine rotor, thereby driving the generator to generate electrical energy; The heating model is used to provide heat to the heat source to be supplied. For example, when supplying heat to industry, steam that meets the industrial steam pressure and temperature is extracted from the steam turbine and supplied to the industry through the heating model. The compressor model is used to compress air at normal temperature and pressure into air at high temperature and high pressure, and convert the electrical energy generated by the generator into heat energy and pressure energy of the air; The expander model is used to convert the kinetic energy and thermal energy of the high-temperature and high-pressure air into the mechanical energy of the expander rotor; The high-pressure water heat storage and heat release model is used to place high-pressure water in the compressed air energy storage system and store the compression heat during the compression process of the compressor; The air storage model is used to store the high-pressure air compressed by the compressor.

[0038] Step 3: In the industrial heating scenario, when the real-time electricity price is in the low electricity price period, the maximum heating capacity under the real-time power load is greater than the industrial real-time heating demand. By increasing the steam production of the unit, while meeting the industrial real-time heating demand, the remaining maximum heating capacity under the real-time power load after meeting the industrial real-time heating demand is controlled and stored in the high-pressure water heat storage and heat release model through medium-pressure exhaust.

[0039] Step 4: In the industrial heating scenario, when the real-time electricity price is at a high price, control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, heat the condensate of the coal-fired unit, and exhaust the extraction steam of the coal-fired unit's steam turbine to the coal-fired unit's steam turbine to perform work, so as to control the coal-fired unit to provide heating to the industry, increase the power generation of the coal-fired unit, and thereby improve the economy of the unit.

[0040] Example 3

[0041] Based on the same inventive concept as Example 1, this example introduces a specific experimental example of a method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system, including: Taking a month in the residential heating season as an example, the power generation and economic changes of the coal-fired unit after coupling with compressed air energy storage are analyzed. The power generation and economic change curves of the coal-fired unit after coupling with compressed air energy storage in the residential heating season are as follows: Figure 3, Figure 4 shown.

[0042] like Figure 3 As shown in the figure, during the period of 10:00-16:00, the spot price of electricity is relatively low. After the coal-fired unit is coupled with compressed air energy storage, the unit power generation is reduced from 112.5MW to 77.1MW. Due to the reduction in power generation during this period, the coal consumption of the coal-fired unit is reduced, such as Figure 4 As shown in the chart, the net income of the unit at 10:00 increased from -26,907.14 yuan to -18,637.31 yuan. On the heating day, the net income of the coal-fired unit increased from 893,310.05 yuan to 934,202.78 yuan.

[0043] Example 4

[0044] Based on the same inventive concept as Example 2, this example introduces a specific experimental example of a coordinated operation method of a coal-fired unit coupled with a compressed air energy storage system, including: In the industrial heating season, the power generation and economic efficiency of the coal-fired unit after coupling with compressed air energy storage are as follows: Figure 5 , Figure 6 As shown. On the basis of ensuring industrial heating, the steam production of the unit is appropriately increased during the period of low electricity prices. During the period of low electricity prices from 10:00 to 16:00, the high-pressure hot water storage stores 36.8MW / h of heat. During the period of high electricity prices from 18:00 to 21:00, the heat stored in the high-pressure water is used to heat the condensate of the coal-fired unit, increasing the unit's power generation by 13.085MW / h. Figure 6 As shown, during the low electricity price period of the entire power supply day, 112.87MW of additional power was generated, and the system revenue during this period decreased by 42,091.05 yuan. During the high electricity price period, the system generated 74.96MW more power, and the revenue during this period increased by 65,425 yuan. The system revenue for the entire heating day increased by 23,333.95 yuan.

[0045] Example 5

[0046] Based on the same inventive concept as Embodiment 1, 2, 3 or 4, this embodiment introduces a coordinated operation system of a coal-fired unit coupled with a compressed air energy storage system, including: Data acquisition module, used to obtain real-time power clearing curves, real-time dispatch node prices, and heating load forecast curves in the power spot trading market; According to the power clearing curve, the real-time power load of the coal-fired unit is obtained; according to the real-time dispatching node price, the real-time electricity price of the coal-fired unit is obtained; according to the heating load prediction curve, the real-time heating demand of residents and the real-time heating demand of industry are obtained; The residential heating module is used to: if the current scene is a residential heating scene and the real-time electricity price is in a low-price period, control the heat in the high-pressure water of part of the compressed air energy storage system to provide heating to the residents according to the maximum heating supply under the real-time power load and the real-time heating demand of the residents; The high-pressure water heating module is used to: if the current scenario is a residential heating scenario and the real-time electricity price is in a high-price period, control the exhaust heat of the medium-pressure cylinder of some coal-fired units to heat the high-pressure water of the compressed air energy storage system while meeting the real-time heating demand of the residents; If the current scenario is an industrial heating scenario and the real-time electricity price is in a low-price period, the heat of the medium-pressure exhaust gas of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system while meeting the real-time industrial heating demand; The industrial heating module is used to: if the current scene is an industrial heating scene and the real-time electricity price is in a high electricity price period, control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, and control the coal-fired unit to provide heating for the industry.

[0047] The specific functions of the above modules are implemented by referring to the relevant contents in the methods of Examples 1, 2, 3 or 4 and will not be elaborated here.

[0048] Example 6

[0049] This embodiment provides a computer-readable storage medium on which computer instructions are stored. When the computer instructions are executed by a processor, the steps of the method described in Embodiment 1, 2, 3 or 4 are implemented.

[0050] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the enlightenment of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the protection of the present invention.

Claims

1. A method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system, characterized in that: include: Obtain real-time power clearing curves, real-time dispatch node prices, and heating load forecast curves in the power spot trading market; According to the power clearing curve, the real-time power load of the coal-fired unit is obtained; According to the real-time dispatch node price, the real-time electricity price of the coal-fired unit is obtained; according to the heating load prediction curve, the real-time heating demand of residents and the real-time heating demand of industry are obtained; If the current scenario is residential heating and the real-time electricity price is in a low-price period, based on the maximum heating amount under the real-time power load and the real-time heating demand of the residents, the heat in the high-pressure water of the compressed air energy storage system is controlled to provide heating to the residents; If the current scenario is residential heating and the real-time electricity price is in a high-price period, the exhaust heat of the intermediate-pressure cylinders of some coal-fired units is controlled to supplement the heat of the high-pressure water of the compressed air energy storage system while meeting the real-time heating needs of the residents; If the current scenario is an industrial heating scenario and the real-time electricity price is in a low-price period, the heat of the medium-pressure exhaust gas of some coal-fired units is controlled to supplement the heat of the high-pressure water of the compressed air energy storage system while meeting the real-time industrial heating demand; If the current scenario is an industrial heating scenario and the real-time electricity price is in a high electricity price period, the heat in the high-pressure water of the compressed air energy storage system is controlled to be exchanged to the coal-fired unit, and the coal-fired unit is controlled to provide heating for the industry.

2. The method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system according to claim 1, characterized in that: According to the maximum heat supply under the real-time power load and the real-time heating demand of residents, the heat in the high-pressure water of part of the compressed air energy storage system is controlled to provide heating to the residents, including: The maximum heating supply under the real-time power load is less than the real-time heating demand of the residents. The compressed air energy storage system is charged to release heat, and the remaining real-time heating demand of the residents is provided to the residents by controlling the heat in the high-pressure water of the compressed air energy storage system.

3. The method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system according to claim 1, characterized in that: Under the premise of meeting the real-time heating needs of residents, the exhaust heat of the intermediate pressure cylinders of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system, including: The maximum heating capacity under the real-time power load is greater than the real-time heating demand of the residents. The compressed air energy storage system discharges to absorb heat and controls the remaining maximum heating capacity under the real-time power load after the real-time heating demand of the residents is met to supplement the heat for the high-pressure water of the compressed air energy storage system.

4. The method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system according to claim 1, characterized in that: Under the premise of meeting the real-time industrial heating demand, the medium-pressure exhaust heat of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system, including: The maximum heating capacity under the real-time power load is greater than the real-time industrial heating demand. The remaining maximum heating capacity under the real-time power load after the real-time industrial heating demand is met is controlled to supplement the heat for the high-pressure water of the compressed air energy storage system.

5. The method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system according to claim 1, characterized in that: Control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, and use the coal-fired unit to provide heating for industry, including: Control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, heat the condensate of the coal-fired unit, and control the coal-fired unit to provide heating for industry.

6. The method for coordinated operation of a coal-fired unit coupled with a compressed air energy storage system according to claim 1, characterized in that: Under the premise of meeting the real-time heating needs of residents, the exhaust heat of the intermediate pressure cylinders of some coal-fired units is controlled to supplement the high-pressure water of the compressed air energy storage system, including: When the heat absorbed by the high-pressure water of the compressed air energy storage system is equal to the heat released by the high-pressure water of the compressed air energy storage system, the heating of the high-pressure water of the compressed air energy storage system is stopped.

7. A coordinated operation system of a coal-fired unit coupled with a compressed air energy storage system, characterized in that: include: Data acquisition module, used to obtain real-time power clearing curves, real-time dispatch node prices, and heating load forecast curves in the power spot trading market; According to the power clearing curve, the real-time power load of the coal-fired unit is obtained; According to the real-time dispatch node price, the real-time electricity price of the coal-fired unit is obtained; according to the heating load prediction curve, the real-time heating demand of residents and the real-time heating demand of industry are obtained; The residential heating module is used to: if the current scenario is a residential heating scenario and the real-time electricity price is in a low-price period, control the heat in the high-pressure water of a part of the compressed air energy storage system to provide heating to the residents according to the maximum heating amount under the real-time power load and the real-time heating demand of the residents; The high-pressure water heating module is used to: if the current scenario is a residential heating scenario and the real-time electricity price is in a high-price period, control the exhaust heat of the medium-pressure cylinder of some coal-fired units to heat the high-pressure water of the compressed air energy storage system while meeting the real-time heating demand of the residents; If the current scenario is an industrial heating scenario and the real-time electricity price is in a low-price period, the heat of the medium-pressure exhaust gas of some coal-fired units is controlled to supplement the heat of the high-pressure water of the compressed air energy storage system while meeting the real-time industrial heating demand; The industrial heating module is used to: if the current scene is an industrial heating scene and the real-time electricity price is in a high electricity price period, control the heat exchange in the high-pressure water of the compressed air energy storage system to the coal-fired unit, and control the coal-fired unit to provide heating for the industry.

8. A computer-readable storage medium having computer instructions stored thereon, characterized in that: When the computer instructions are executed by a processor, the steps of the method described in any one of claims 1 to 6 are implemented.

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