Heat supply system of photo-thermal coupling thermal power generating unit and operation method

Abstract

The invention provides a heat supply system of a photo-thermal coupling thermal power generating unit and an operation method, and belongs to the technical field of heat supply. According to the system, a groove type condenser field, a high-low temperature storage tank and a heat exchange assembly are coupled to a traditional heat supply thermal power generating unit, one end of the groove type condenser field is connected with the low temperature storage tank, the other end of the groove type condenser field is connected with the high temperature storage tank, and a working medium is heated through solar energy; the high-temperature storage tank and the low-temperature storage tank are respectively connected with the heat exchange assembly to heat condensed water of the thermal power generating unit or heat supply network return water to supply heat to a heat supply or steam supply pipeline. The system is applied to a photo-thermal coupling thermal power generating unit heat supply system, changes of peak regulation and peak requirements, heat supply loads and illumination resources of a thermal power generating unit are monitored in real time, the peak regulation and peak regulation capacity of the thermal power generating unit is enhanced, and meanwhile heat supply stability is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of heating technology, and in particular to a heating system and operation method for a solar-thermal coupled thermal power unit. Background Technology

[0002] Against the backdrop of an accelerated global energy structure transition towards low-carbon development, the large-scale grid connection of renewable energy sources, such as wind and solar power, has increasingly highlighted the volatility and uncertainty of the power system. Building a new power system dominated by new energy sources requires a profound transformation in the role of traditional thermal power units, shifting them from being the primary power source to one that balances basic security and system regulation. In this process, thermal power units not only need to undertake deep peak-shaving tasks to smooth out fluctuations in renewable energy output, but also need to possess rapid peak-suppression capabilities during peak hours to ensure the safe and stable operation of the power grid. With the advancement of the electricity spot market, the peak-valley price difference continues to widen, making it crucial to further enhance the peak-shaving and peak-suppression capabilities of thermal power units an important way for power plants to improve their operating profitability.

[0003] However, current thermal power units primarily serve local industrial steam supply or residential heating needs. Under deep-load operation, the extraction steam volume and parameters decrease, making it difficult to ensure stable steam or heating supply. During peak operation, peak capacity is limited due to the need to guarantee downstream industrial steam consumption and heating extraction. Therefore, the decoupling of thermal power units is urgently needed. Technical upgrades focusing on this process primarily concentrate on thermal storage systems, such as molten salt, solid-state, and hot water storage. However, these technologies largely rely on electric heating to convert electrical energy into thermal energy storage, failing to adequately consider the loss of electrical energy quality, leaving room for overall energy efficiency optimization. On the other hand, existing flue gas waste heat recovery technologies, such as low-temperature economizers, low-temperature flue gas treatment, bypass flues, and heat pump systems, while significantly improving unit energy efficiency, generally lack coordinated design with peak power demand and fail to achieve system-level coupling under the context of thermal-electric decoupling. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a heating system and operation method for a solar-thermal coupled thermal power unit, which is applied to the heating system of the solar-thermal coupled thermal power unit to monitor the peak demand, heating load and solar resources of the thermal power unit in real time, enhance the peak demand and peak load capacity of the thermal power unit, and at the same time ensure the stability of heating.

[0005] In a first aspect, the present invention provides a heating system for a solar-thermal coupled thermal power unit, wherein the thermal power unit is connected to a solar-thermal subsystem; In the thermal power unit, the boiler, high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder, generator, condenser, condensate pump, low-pressure heater, deaerator, feedwater pump, and high-pressure heater are connected in sequence, and the medium-pressure cylinder and low-pressure cylinder are connected to the first station of the heating network. The return water pipeline of the heating network is connected to the input end of the heating network first station and the input end of the solar thermal subsystem, respectively, and the supply water pipeline of the heating network is connected to the output end of the heating network first station and the output end of the solar thermal subsystem, respectively.

[0006] In one embodiment, the photothermal subsystem with heat storage includes a trough-type concentrating mirror field, a high-temperature tank, a low-temperature tank, and a heat exchange assembly. The trough-type concentrating mirror field performs a heating action on the heat storage medium transported by the cryogenic tank; After the heating process is completed, the heat storage medium is transported to a high-temperature tank; The high-temperature tank transports the heat storage medium stored inside to the heat exchange components; The heat exchange process is completed within the heat exchange components to provide heat to the target pipelines within the thermal power unit. After the heat exchange process is completed, the heat storage medium is transported to the cryogenic tank.

[0007] In one embodiment, the heat exchange assembly includes a superheater, an evaporator, and a preheater; The high-temperature tank sequentially transports the stored heat storage medium to the superheater, evaporator, and preheater.

[0008] In one embodiment, the condensate pipeline and industrial steam pipeline of the thermal power unit are connected to the heat exchange components. The condensate in the condensate pipeline is sequentially transported to the preheater, evaporator and superheater to complete the heat exchange process. The industrial steam generated by the heat exchange process is then transported to the industrial steam pipeline.

[0009] In one embodiment, the return water pipeline and supply water pipeline of the thermal power unit are connected to the heat exchange components: The low-temperature water transported by the return water pipeline of the heating network is sequentially transported to the preheater and evaporator to complete the heat exchange process. The high-temperature water generated by the heat exchange process is then transported to the supply water pipeline of the heating network.

[0010] In one embodiment, the thermal power unit is used to: simultaneously heat the target pipeline within the thermal power unit while the solar thermal subsystem is heating the target pipeline within the thermal power unit.

[0011] Secondly, the present invention also provides a heating operation method for a solar-thermal coupled thermal power unit. The method is applied to a heating system, which includes a coupled solar-thermal subsystem with heat storage and a thermal power unit. The method includes: Real-time monitoring of peak demand of thermal power units, changes in heating load and solar resources, and analysis of actions to be taken by the heating system, including heat storage actions, heat release actions and no response actions; For the heat storage action, the photothermal subsystem performs a heating action on the heat storage medium to generate heat, which is stored in a high-temperature tank; For heat release actions, the heat stored in the high-temperature tank is used to heat the condensate or return water of the heating network through the heat exchange components, so as to supply heat to the target pipeline in the thermal power unit.

[0012] This invention provides a solar-thermal coupled heating system and operation method for thermal power units, applicable to heating systems. The system includes: a thermal power unit; and a solar-thermal subsystem coupled to the thermal power unit with heat storage capabilities. The solar-thermal subsystem is used to: generate heat by heating the heat storage medium during designated time periods (i.e., when solar resources are good and the thermal power unit faces insufficient deep-heating capacity), and then use this heat to heat the target pipelines within the thermal power unit; and to utilize the heat stored during designated time periods (i.e., at night or on cloudy / rainy days when solar resources are poor and the thermal power unit needs peak heating), and to utilize the heat stored in the solar-thermal subsystem during the designated time periods to heat the target pipelines within the thermal power unit. This invention proposes coupling a solar-thermal system and a thermal power unit. The solar-thermal system provides a stable heat source during the day, solving the problem of insufficient heating capacity under deep-heating conditions in thermal power units. At night, the heat stored in the solar-thermal system is used for heating, improving the peak-load capacity of the thermal power unit. This completely decouples the rigid coupling between power generation load and heating, achieving a balance between peak-load regulation and stable heating for thermal power units. In addition, solar thermal energy directly converts solar radiation into heat energy, resulting in higher overall energy utilization efficiency and a lower carbon footprint throughout the entire life cycle. It can reduce coal consumption in thermal power units for heating and is a truly green and flexible technology that aligns with the energy conservation and carbon reduction guidelines.

[0013] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0014] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the heating system of a photothermal coupled thermal power unit provided in an embodiment of the present invention; Figure 2 A schematic flowchart illustrating a heating operation method for a photothermal coupled thermal power unit provided in an embodiment of the present invention; Figure 3 This is a technical framework diagram of a heating operation method for a photothermal coupled thermal power unit provided in an embodiment of the present invention.

[0017] Icons: 1-Boiler; 2-High-pressure cylinder; 3-Medium-pressure cylinder; 4-Low-pressure cylinder; 5-Generator; 6-Condenser; 7-Condensate pump; 8-Low-pressure heater; 9-Deaerator; 10-Feed water pump; 11-High-pressure heater; 12-Heating network first station; 13-Trough concentrator; 14-Cryogenic tank; 15-High-temperature tank; 16-Cryogenic pump; 17-High-temperature pump; 18-Preheater; 19-Evaporator; 20-Superheater; 21-Condensate pump. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Currently, existing technologies suffer from the following problems: they fail to fully consider the loss of electricity quality, leaving room for overall energy efficiency optimization; they generally lack coordinated design with peak power demand and fail to achieve system-level coupling under the background of thermal-electric decoupling. Considering that thermal power units often face deep regulation pressure when solar resources are good, the amount of steam that can be extracted from the unit and the extraction parameters decrease, making it difficult to guarantee the stability of downstream industrial steam supply and residential heating. If solar thermal power can be coupled with thermal power units at the system level, resolving the core contradiction between peak power demand and stable heating, while improving the cleanliness of heating, it will provide a new technical route for thermal power units to achieve coordinated optimization and safe supply of electricity and heat. Based on this, this invention provides a heating system and operation method for solar thermal coupled thermal power units, which can resolve the core contradiction between peak power demand and stable heating.

[0020] To facilitate understanding of this embodiment, a detailed description of the heating system of a solar-thermal coupled thermal power unit disclosed in this embodiment of the invention is provided first. The thermal power unit is connected to a solar-thermal subsystem. In the thermal power unit, the boiler, high-pressure cylinder, intermediate-pressure cylinder, low-pressure cylinder, generator, condenser, condensate pump, low-pressure heater, deaerator, feedwater pump, and high-pressure heater are connected sequentially. The intermediate-pressure cylinder and low-pressure cylinder are connected to the primary heating station of the heating network. The return water pipeline of the heating network is connected to the input end of the primary heating station and the input end of the solar-thermal subsystem, respectively. The supply water pipeline of the heating network is connected to the output end of the primary heating station and the output end of the solar-thermal subsystem, respectively. The solar-thermal subsystem includes a trough-type concentrating mirror field, a high-temperature tank, a low-temperature tank, and heat exchange components. The heat exchange components include a superheater, an evaporator, and a preheater. See also... Figure 1 The diagram shows a structural schematic of a heating system for a solar-thermal coupled thermal power unit: The solar thermal subsystem is used to: generate heat by heating the heat storage medium within a specified time interval, i.e. when solar resources are good and thermal power units face insufficient deep-heating capacity, the solar thermal subsystem uses the heat to heat the target pipelines within the thermal power unit; and during non-specified time intervals, i.e. at night or on cloudy or rainy days when solar resources are poor and thermal power units need peak heating, the solar thermal subsystem can use the heat it stores within the specified time interval to heat the target pipelines within the thermal power unit.

[0021] In one specific implementation, the specified time interval can be obtained by analyzing the peak demand of thermal power units, changes in heating load, and solar resources, and then executing corresponding actions. For example, within the specified time interval, one or more of the following actions can be performed: heat storage, heat release, or no response (such as performing only heat storage, or performing both heat storage and heat release, or no response). Outside the specified time interval, heat release or no response is performed. Among these actions, heat storage refers to the solar thermal subsystem heating the heat storage medium to generate heat, which is stored in a high-temperature tank. Heat release refers to using the heat stored in the high-temperature tank to heat condensate or return water from the heating network through heat exchange components to supply heat to the target pipelines within the thermal power unit.

[0022] In one example, within a specified time interval, the solar thermal subsystem heats the heat storage medium to generate heat, which is then used to supply heat to the target pipeline within the thermal power unit. The thermal power unit includes a condenser and industrial steam pipelines; the condenser, preheater, evaporator, superheater, and industrial steam pipelines constitute the steam supply subsystem, with the industrial steam pipeline as the target pipeline. The thermal power unit also includes a heating network return water pipeline and a heating network supply water pipeline; the heating network return water pipeline, preheater, evaporator, superheater, and heating network supply water pipeline constitute the heating supply subsystem, with the heating network supply water pipeline as the target pipeline.

[0023] In another example, during a non-specified time interval, the heat stored in the solar thermal subsystem during a specified time interval is used to heat the target pipeline within the thermal power unit. The thermal power unit includes a condenser and industrial steam pipelines; the condenser, preheater, evaporator, superheater, and industrial steam pipelines constitute the steam supply subsystem, and the target pipeline is the industrial steam pipeline. The thermal power unit also includes a heating network return water pipeline and a heating network supply water pipeline; the heating network return water pipeline, preheater, evaporator, superheater, and heating network supply water pipeline constitute the heating supply subsystem, and the target pipeline is the heating network supply water pipeline.

[0024] The solar thermal coupling heating system provided in this invention combines a solar thermal system and a thermal power unit. The solar thermal system provides a stable heat source during the day, addressing the insufficient heating capacity of thermal power units under heavy load conditions. At night, the heat stored in the solar thermal system is used for heating, enhancing the peak capacity of the thermal power unit. This completely decouples the rigid coupling between power generation load and heating, achieving a balance between peak load regulation and stable heating. Furthermore, solar thermal directly converts solar radiation energy into heat energy, resulting in higher overall system energy efficiency and a lower carbon footprint throughout its lifecycle. This reduces coal consumption in thermal power units for heating, making it a truly green and flexible technology aligned with energy conservation and carbon reduction principles.

[0025] To facilitate understanding, the heating system will first be explained. Please continue reading... Figure 1 It includes: boiler 1, high-pressure cylinder 2, medium-pressure cylinder 3, low-pressure cylinder 4, generator 5, condenser 6, condensate pump 7, low-pressure heater 8, deaerator 9, feedwater pump 10, high-pressure heater 11, heating network head station 12, trough-type concentrating mirror field 13, low-temperature tank 14, high-temperature tank 15, low-temperature pump 16, high-temperature pump 17, preheater 18, evaporator 19, superheater 20, and condensate pump 21.

[0026] A thermal power unit consists of a boiler (1), a high-pressure cylinder (2), a medium-pressure cylinder (3), a low-pressure cylinder (4), a generator (5), a condenser (6), a condensate pump (7), a low-pressure heater (8), a deaerator (9), a feedwater pump (10), a high-pressure heater (11), and a heating network primary station (12).

[0027] The photovoltaic unit comprises a trough-type concentrating mirror field 13, a low-temperature tank 14, a high-temperature tank 15, a low-temperature pump 16, a high-temperature pump 17, a preheater 18, an evaporator 19, a superheater 20, and a condensate pump 21. Specifically, the low-temperature tank 14 and the low-temperature pump 16 constitute the low-temperature component, the high-temperature tank 15 and the high-temperature pump 17 constitute the high-temperature component, and the preheater 18, the evaporator 19, and the superheater 20 constitute the heat exchange component.

[0028] Based on the above structure, this embodiment of the invention provides a specific implementation process of a heating operation method for a photothermal coupled thermal power unit.

[0029] Within a specified time interval, the heat storage medium transported by the trough-type concentrating mirror field 13 is heated; the heat storage medium after the heating action is performed is transported to the high-temperature tank; the high-temperature component transports the heat storage medium stored therein to the heat exchange component; the heat exchange action is completed in the heat exchange component to provide heat for the target pipeline in the thermal power unit; the heat storage medium after the heat exchange action is completed is transported to the low-temperature tank.

[0030] During unspecified time intervals, the high-temperature tank transfers the stored heat storage medium to the heat exchange assembly; the heat exchange process is completed in the heat exchange assembly to provide heat to the target pipeline in the thermal power unit; after the heat exchange process is completed, the heat storage medium is transferred to the low-temperature tank.

[0031] Specifically, the process by which the high-temperature component transports the heat storage medium stored inside to the heat exchange component is as follows: the high-temperature tank sequentially transports the heat storage medium stored inside to the superheater 20, the evaporator 19 and the preheater 18.

[0032] Specifically, when the target heating pipeline is an industrial steam pipeline, the condensate in the condensate pipeline is sequentially transported to the preheater 18, evaporator 19, and superheater 20 by the condensate pump 21 to complete the heat exchange action, and the industrial steam generated by the heat exchange action is transported to the industrial steam pipeline.

[0033] Specifically, when the target heating pipeline is the heating network water supply pipeline, the low-temperature water transported by the heating network return water pipeline is sequentially transported to the preheater 18, evaporator 19, and superheater 20 to complete the heat exchange action, and the high-temperature water generated by the heat exchange action is transported to the heating network water supply pipeline.

[0034] While providing heat through the solar thermal subsystem, the thermal power unit can also provide heat to the target pipelines within it.

[0035] Based on this, see Figure 2 The diagram shows a flow chart of a solar-thermal coupled thermal power unit's heating operation method. The method is applied to a heating system, which includes a coupled solar-thermal subsystem with heat storage and a thermal power unit. The method includes the following steps S202 to S206: Step S202: Monitor the peak demand of thermal power units, changes in heating load and solar resources in real time, and analyze the actions to be taken by the heating system, including heat storage actions, heat release actions and no response actions.

[0036] In step S204, for the heat storage action, the photothermal subsystem performs a heating action on the heat storage medium to generate heat, which is stored in a high-temperature tank.

[0037] Step S206: For the heat release action, the heat stored in the high-temperature tank is used to heat the condensate or the return water of the heating network through the heat exchange components to supply heat to the target pipeline in the thermal power unit.

[0038] The overall operating logic of the operating method provided in this embodiment of the invention is as follows: During the day / sunny days when thermal power units need peak shaving, their heating capacity is insufficient. At this time, the solar thermal subsystem heats the heat storage medium and simultaneously heats the return water or condensate of the heating network for heating, with heating and heat release occurring simultaneously. At night / rainy days when thermal power units need peak power, they need to reduce heating and extract steam to generate more electricity. In this case, the heat stored in the solar thermal subsystem is used for heating.

[0039] For specific implementation details, please refer to [link / reference]. Figure 3 The diagram shown illustrates a technical framework for a solar-thermal coupled thermal power unit's heating operation method. Specifically: When daytime sunlight resources are good, thermal power units typically face deep regulation pressure. At this time, heating units often encounter problems with insufficient extraction steam or low extraction parameters from downstream industrial steam or residential heating. In this situation, the heat storage medium from the low-temperature tank is heated through a trough-type concentrating mirror field and enters the high-temperature tank. The high-temperature heat storage medium in the high-temperature tank flows sequentially through the superheater, evaporator, and preheater to release heat. For steam-supplying units, some condensate flows sequentially into the preheater, evaporator, and superheater, generating high-temperature, high-pressure industrial steam, which is then channeled into the industrial steam pipeline. For heating units, some low-temperature water from the heating network return water flows sequentially into the preheater and evaporator, and the resulting high-temperature water is channeled into the heating network supply pipeline.

[0040] When sunlight is scarce at night, thermal power units typically face peak pressure. At this time, to ensure stable industrial steam or residential heating, the units cannot fully utilize their peak capacity. Utilizing the heat stored during the day for steam or heating can reduce the amount of steam extracted by the units. For steam-supplying units, some condensate flows sequentially into the preheater, evaporator, and superheater, generating high-temperature, high-pressure industrial steam, which then flows into the industrial steam pipeline. For heating units, some low-temperature water from the heating network return water flows sequentially into the preheater and evaporator, and the resulting high-temperature water flows into the heating network supply pipeline.

[0041] For example, the heat storage medium mentioned above can be heat transfer oil (25-400℃) or molten salt (150-500℃).

[0042] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0043] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0044] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A heat supply system of a photo-thermal coupling thermal power unit, characterized in that, The thermal power unit is connected with a photo-thermal subsystem; The boiler, the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, the generator, the condenser, the condensate pump, the low-pressure heater, the deaerator, the feed water pump, and the high-pressure heater are connected in sequence in the thermal power unit, and the medium-pressure cylinder and the low-pressure cylinder are connected with a heat supply network first station; A heat supply network return water pipeline is connected with an input end of the heat supply network first station and an input end of the photo-thermal subsystem, and a heat supply network water supply pipeline is connected with an output end of the heat supply network first station and an output end of the photo-thermal subsystem.

2. The heat supply system of a photo-thermal coupling thermal power unit according to claim 1, characterized in that, The photo-thermal subsystem with heat storage includes a trough concentrator field, a high-temperature tank, a low-temperature tank, and a heat exchange assembly; The trough concentrator field performs a heating action on the heat storage medium delivered by the low-temperature tank; The heat storage medium after the heating action is delivered to the high-temperature tank; The high-temperature tank delivers the heat storage medium stored therein to the heat exchange assembly; In the heat exchange assembly, a heat exchange action is completed to supply heat to a target pipeline in the thermal power unit, and the heat storage medium after the heat exchange action is delivered to the low-temperature tank.

3. The heat supply system of a photo-thermal coupling thermal power unit according to claim 2, characterized in that, The heat exchange assembly includes a superheater, an evaporator, and a preheater; The high-temperature tank delivers the heat storage medium stored therein to the superheater, the evaporator, and the preheater in sequence.

4. The heat supply system of a photo-thermal coupling thermal power unit according to claim 3, characterized in that, The condensate pipeline and the industrial steam pipeline of the thermal power unit are connected with the heat exchange assembly; The condensate in the condensate pipeline is delivered to the preheater, the evaporator, and the superheater in sequence to complete a heat exchange action, and the industrial steam generated by the heat exchange action is delivered to the industrial steam pipeline.

5. The heat supply system of a photo-thermal coupling thermal power unit according to claim 3, characterized in that, The heat supply network return water pipeline and the heat supply network water supply pipeline of the thermal power unit are connected with the heat exchange assembly: The low-temperature water delivered by the heat supply network return water pipeline is delivered to the preheater and the evaporator in sequence to complete a heat exchange action, and the high-temperature water generated by the heat exchange action is delivered to the heat supply network water supply pipeline.

6. The heat supply system of a photo-thermal coupling thermal power unit according to claim 1, characterized in that, The thermal power unit is used to supply heat to the target pipeline in the thermal power unit during the process in which the photo-thermal subsystem supplies heat to the target pipeline.

7. A method for heat supply operation of a photo-thermal coupled thermal power unit, characterized in that, The method is applied to a heat supply system including a photo-thermal subsystem with heat storage and a thermal power unit coupled with each other, and the method includes: Real-time monitoring of peak shaving and peak demand of the thermal power unit, heat supply load variation, and illumination resources, analysis of actions to be taken by the heat supply system, including heat storage action, heat release action, and no-response action; For the heat storage action, the photo-thermal subsystem performs a heating action on the heat storage medium to generate heat, and the heat is stored in a high-temperature tank; For the heat release action, the heat stored in the high-temperature tank is used to heat condensate water or heat supply network return water through a heat exchange assembly to supply heat to a target pipeline in the thermal power unit.

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