Plateau multi-energy complementary power generation system based on groove type photo-thermal

Abstract

The invention provides a plateau multi-energy complementary power generation system based on groove type photo-thermal. The plateau multi-energy complementary power generation system comprises an expansion overflow system, a heat collection field, an oil-salt heat exchanger set, a hot salt tank, a cold salt tank, a decoupling steam generation system, a steam generation system, a steam turbine set, an air cooling island, a condensation water module and a heating deoxygenation module. According to the technical scheme, high-efficiency energy utilization, multi-energy complementation and multi-scene flexible operation can be realized in the plateau extremely cold environment, the regulation and control capability of the system is enhanced, and the safety and stability of the system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of plateau isolated grid power generation, and in particular to a plateau multi-energy complementary power generation system based on trough-type solar thermal energy. Background Art

[0002] With the increasing global demand for clean energy, renewable energy generation technology has been widely used, especially in plateau areas. For example, photovoltaic power generation, solar thermal power generation, and wind power generation are widely used in plateau isolated power supply projects due to their high resource utilization and environmental friendliness. However, the special geographical environment and load demand of the plateau also pose severe challenges to related technologies. In the existing technology, plateau isolated power supply projects usually use the following three main forms of solar power generation: The first is large-scale centralized photovoltaic power generation, which uses solar energy resources to efficiently generate electricity. This method has low investment costs and is simple to operate, but due to the intermittent characteristics of photovoltaic power generation, its power supply capacity is limited by sunshine conditions and cannot stably and continuously meet all-weather load requirements, especially at night and on cloudy days. In addition, large-scale photovoltaic systems are usually combined with lithium battery energy storage, but the low temperature characteristics of the plateau environment will significantly reduce the efficiency and service life of the energy storage system, and its economy and long-term stability are limited.

[0003] The second is to combine trough solar thermal with molten salt heat storage for power generation. This system generates heat energy by collecting solar radiation in a centralized manner and then converts it into stable electricity, providing a good way to utilize the long-term sunshine conditions on the plateau. With the help of molten salt heat storage devices, this technology can continuously supply power at night or in the absence of light, thus overcoming the problem of instability in traditional photovoltaic power generation. However, this technology has a large initial investment and high requirements for equipment maintenance. When operating under low pressure and high cold conditions, it is easily affected by high-altitude environmental factors such as low temperature and large temperature difference between day and night. The reliability of long-term operation of the equipment has not yet been fully resolved.

[0004] The third is distributed small-scale photovoltaic systems, which are suitable for remote villages or small load scenarios. This type of system is simple to connect and flexible to deploy, and is suitable for power supply to isolated user loads. However, due to its small scale and low power output, it is difficult to support the power demand of large industrial loads alone. In addition, due to the similar intermittent problems of distributed photovoltaic systems and the harsh test of the local environment on the equipment, its power supply quality is often restricted.

[0005] As a world-renowned lithium carbonate resource producing area, the special industrial nature of the Zabuye region has exacerbated the uncertainty of the operation of the power supply system. In reality, the processing and production of lithium carbonate requires continuous and stable power supply, and the equipment is sensitive to power outages, which places extremely high demands on the stability, safety and adjustable performance of the power supply system. The existing single technology model or simple coupling system is difficult to fully meet the power demand of these industrial loads, and unstable power supply capacity may even seriously affect the production capacity of lithium salt processing plants.

[0006] Therefore, it is necessary to develop a new power generation system based on the concept of multi-energy complementarity to achieve deep integration of source, grid, load and storage. Summary of the invention

[0007] In view of the defects in the prior art, the purpose of the present invention is to provide a plateau multi-energy complementary power generation system based on trough-type solar thermal, which can achieve efficient energy utilization and multi-energy complementarity in the extremely cold environment of the plateau, flexibly operate in multiple scenarios, enhance the system regulation capability, and improve the system safety and stability.

[0008] The present invention provides a plateau multi-energy complementary power generation system based on trough-type solar thermal, comprising an expansion overflow system, a solar collector field, an oil-salt heat exchanger group, a hot salt tank, a cold salt tank, a decoupled steam generation system, a steam generation system, a steam turbine unit, an air-cooling island, a condensate module and a heating and deoxidation module; The heat transfer oil output end of the expansion overflow system is connected to the heat transfer oil input end of the heat collection field, the high temperature heat transfer oil output end of the heat collection field is connected to the heat transfer oil input end of the steam generation system, and the heat transfer oil output end of the steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The high-temperature heat transfer oil output end of the heat collection field is also connected to the high-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the low-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the expansion overflow system; the low-temperature molten salt input end of the oil-salt heat exchanger group is connected to the cold salt tank, and the high-temperature molten salt output end of the oil-salt heat exchanger group is connected to the hot salt tank; The high-temperature heat transfer oil output end of the heat collection field is also connected to the heat transfer oil input end of the decoupling steam generation system, and the heat transfer oil output end of the decoupling steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The low-temperature heat transfer oil output end of the solar collector field is connected to the low-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the steam generation system; the high-temperature molten salt input end of the oil-salt heat exchanger group is connected to the hot salt tank, and the low-temperature molten salt output end of the oil-salt heat exchanger group is connected to the cold salt tank; The steam output end of the steam generating system is connected to the steam input end of the steam turbine unit, the steam discharge end of the steam turbine unit is connected to the steam input end of the air cooling island, the water working medium output end of the air cooling island is connected to the water working medium input end of the condensate module, the water working medium output end of the condensate module is connected to the water working medium input end of the heating and deoxygenation module, and the water working medium output end of the heating and deoxygenation module is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system; The steam output end of the decoupling steam generating system and the steam output end of the heating and deoxidation module are both connected to the steam input end of the industrial production energy unit.

[0009] Furthermore, it also includes a first pipeline, and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the steam generation system through the first pipeline.

[0010] Furthermore, it also includes a loss regeneration system, the high-temperature thermal oil output end of the collector field is also connected to the thermal oil input end of the loss regeneration system, and the thermal oil output end of the loss regeneration system is connected to the thermal oil return end of the expansion overflow system.

[0011] Furthermore, it also includes a mirror field circulation pump group, the thermal oil output end of the mirror field circulation pump group is connected to the thermal oil input end of the solar collector field, and the low-temperature thermal oil output end of the solar collector field is connected to the thermal oil input end of the mirror field circulation pump group.

[0012] Furthermore, it also includes a thermal oil anti-condensation furnace, the thermal oil output end of the thermal oil anti-condensation furnace is connected to the thermal oil input end of the mirror field circulation pump group, and the thermal oil output end of the mirror field circulation pump group is connected to the thermal oil input end of the thermal oil anti-condensation furnace.

[0013] Furthermore, the condensate water module includes a condensate water tank and a condensate water pump; the water working medium output end of the air-cooling island is connected to the water working medium input end of the condensate water tank, the water working medium output end of the condensate water tank is connected to the water working medium input end of the condensate water pump, and the water working medium output end of the condensate water pump is connected to the water working medium input end of the heating and deoxygenation module.

[0014] Furthermore, the heating and deoxygenation module includes a high-pressure heater, a deaerator and a low-pressure heater, the water working medium output end of the condensate pump is connected to the water working medium input end of the low-pressure heater, the water working medium output end of the low-pressure heater is connected to the water working medium input end of the deaerator, the water working medium output end of the deaerator is connected to the water working medium input end of the high-pressure heater, the water working medium output end of the high-pressure heater is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system, and the steam output end of the high-pressure heater is connected to the steam input end of the industrial production energy unit.

[0015] Furthermore, the heat sources of the high-pressure heater and the low-pressure heater are both from the extraction steam of the steam turbine unit.

[0016] Furthermore, it also includes a temperature reducing and pressure reducing device, the steam output end of the high-pressure heater is connected to the steam input end of the temperature reducing and pressure reducing device, and the steam output end of the temperature reducing and pressure reducing device is connected to the steam input end of the industrial production energy unit.

[0017] Furthermore, it also includes a second pipeline, which is connected in parallel with the expansion overflow system.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. Efficient energy utilization and multi-energy complementation: (1) By combining the trough solar thermal collection system with thermal energy storage technology, efficient utilization of solar energy resources is achieved. At the same time, through the intervention of the molten salt heat storage device, a stable day and night power generation system is constructed to meet all-weather power generation needs.

[0019] (2) The system achieves multi-energy complementarity through the energy interaction between heat transfer oil and molten salt, effectively improving the overall operating efficiency and energy utilization of the system. It can not only meet the power generation needs, but also directly provide stable steam energy services for industrial production energy-consuming units.

[0020] 2. Adapt to the severe cold plateau environment and ensure stable operation of the system: (1) In order to cope with the extremely low temperature environment at night in the plateau, measures such as designing an anti-condensation circulation loop and starting an anti-condensation furnace were taken to effectively avoid the problem of system shutdown due to low-temperature solidification of the heat transfer oil, thereby improving the low-temperature adaptability and reliability of the equipment.

[0021] (2) The mirror field circulation pump group and the thermal oil anti-condensation furnace work together to ensure that the thermal oil temperature is controllable, which can maintain stable operation of the system even in extreme climates, significantly improving the applicability of the solar thermal power generation system in harsh environments.

[0022] 3. Flexible operation mode in multiple scenarios: (1) Under normal operating conditions, the dual-function switching operation of solar power generation and energy storage is realized. Under special or fault conditions (such as the steam turbine system does not supply gas), the decoupling design is used to directly supply steam to industrial production energy-consuming units to ensure the continuity and reliability of gas use.

[0023] (2) When the expansion overflow system fails, the design is equipped with a thermal oil bypass branch circuit to maintain normal heat collection or circulation operations, thereby improving the system's fault resistance and flexibility.

[0024] 4. Enhanced energy regulation capability and improved environmental friendliness: (1) The efficient heat storage and release performance of the molten salt energy storage device smoothes the impact of the intermittent and volatile nature of solar energy, making power generation more balanced during the day and at night and in line with load demand.

[0025] (2) Reduce the demand for traditional fossil energy backup capacity, reduce greenhouse gas emissions, and achieve higher environmental benefits.

[0026] 5. Improve safety and reduce operational risks: (1) The risk of thermal oil solidification due to low temperature can be minimized by adding a thermal oil anti-condensation furnace and cooperating with the mirror field circulation pump group.

[0027] (2) Decoupling design is used to rationally handle steam supply and emergency conditions, with a focus on improving the independent operation capabilities of different system modules, thereby reducing safety hazards caused by multi-link coupling.

[0028] To sum up, this technical solution can realize trough-type solar thermal, multi-energy complementary, and all-weather operation of power generation and gas supply in plateau areas. At the same time, it has good low-temperature adaptability, system redundancy and fault resistance, and can effectively meet the requirements of continuous energy use and stable energy supply in extreme plateau environments. It has significant operational flexibility, economy and environmental friendliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 A schematic structural diagram of a high-altitude multi-energy complementary power generation system based on trough-type solar thermal energy provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0031] Example: See also Figure 1 , a plateau multi-energy complementary power generation system based on trough-type solar thermal provided in an embodiment of the present application includes an expansion overflow system, a collector field, an oil-salt heat exchanger group, a hot salt tank, a cold salt tank, a decoupled steam generation system, a steam generation system, a steam turbine unit, an air-cooling island, a condensate module and a heating and deoxidation module; The heat transfer oil output end of the expansion overflow system is connected to the heat transfer oil input end of the heat collection field, the high-temperature heat transfer oil output end of the heat collection field is connected to the heat transfer oil input end of the steam generation system, and the heat transfer oil output end of the steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The high-temperature heat transfer oil output end of the solar collector field is also connected to the high-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the low-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the expansion overflow system; the low-temperature molten salt input end of the oil-salt heat exchanger group is connected to the cold salt tank, and the high-temperature molten salt output end of the oil-salt heat exchanger group is connected to the hot salt tank; The high-temperature heat transfer oil output end of the heat collection field is also connected to the heat transfer oil input end of the decoupling steam generation system, and the heat transfer oil output end of the decoupling steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The low-temperature heat transfer oil output end of the solar collector field is connected to the low-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the steam generation system; the high-temperature molten salt input end of the oil-salt heat exchanger group is connected to the hot salt tank, and the low-temperature molten salt output end of the oil-salt heat exchanger group is connected to the cold salt tank; The steam output end of the steam generating system is connected to the steam input end of the steam turbine unit, the steam discharge end of the steam turbine unit is connected to the steam input end of the air cooling island, the water working medium output end of the air cooling island is connected to the water working medium input end of the condensate water module, the water working medium output end of the condensate water module is connected to the water working medium input end of the heating and deoxidation module, and the water working medium output end of the heating and deoxidation module is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system; The steam output end of the decoupling steam generation system and the steam output end of the heating and deoxidation module are both connected to the steam input end of the industrial production energy unit.

[0032] Among them, the high-temperature heat transfer oil input end and the low-temperature heat transfer oil input end of the oil-salt heat exchanger group are the same port used for different working conditions, and the low-temperature heat transfer oil output end and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group are the same port used for different working conditions; The high-temperature molten salt input end and the high-temperature molten salt output end of the oil-salt heat exchanger group are the same port used for different working conditions, and the low-temperature molten salt input end and the low-temperature molten salt output end of the oil-salt heat exchanger group are the same port used for different working conditions; The high-temperature heat transfer oil output end and the low-temperature heat transfer oil output end of the collector field are the same port used for different working conditions.

[0033] Specifically, the collector field is a trough-type solar thermal collector field, and the industrial production energy-consuming unit is a lithium carbonate processing plant. The power generation system realizes the efficient utilization of solar energy resources by combining the trough-type solar thermal collector system with the thermal storage technology. At the same time, through the intervention of the molten salt heat storage device, a stable day and night power generation system is constructed to meet the all-weather power generation needs. Moreover, the power generation system realizes multi-energy complementarity through the energy interaction between heat transfer oil and molten salt, which effectively improves the overall operation efficiency and energy utilization rate of the system. It can not only meet the power generation needs, but also directly provide stable steam energy services for industrial production energy-consuming units, meet the continuous and stable power supply needs of lithium carbonate processing and production links in Zabuye area, effectively reduce power outages, ensure the stability, safety and adjustable performance of the power supply system, and avoid the impact of unstable power supply capacity on the production capacity of lithium salt processing plants. Under special or fault conditions (such as the steam turbine system does not supply gas), steam is directly supplied to industrial production energy-consuming units through decoupling design to ensure the continuity and reliability of gas use.

[0034] In an optional embodiment, the power generation system further includes a first pipeline, and the high-temperature thermal oil output end of the oil-salt heat exchanger group is connected to the thermal oil input end of the steam generation system through the first pipeline.

[0035] In an optional embodiment, the power generation system further includes a loss regeneration system, the high temperature thermal oil output end of the collector field is also connected to the thermal oil input end of the loss regeneration system, and the thermal oil output end of the loss regeneration system is connected to the thermal oil return end of the expansion overflow system. The loss regeneration system is used to restore the performance of the thermal oil, purify pollutants, extend the life of the thermal oil and equipment, reduce energy consumption and maintenance costs, and reduce environmental pressure and ensure long-term safe operation.

[0036] In an optional embodiment, the power generation system also includes a mirror field circulation pump group, the thermal oil output end of the mirror field circulation pump group is connected to the thermal oil input end of the solar collector field, and the low-temperature thermal oil output end of the solar collector field is connected to the thermal oil input end of the mirror field circulation pump group.

[0037] In an optional embodiment, the power generation system also includes a thermal oil anti-condensation furnace, the thermal oil output end of the thermal oil anti-condensation furnace is connected to the thermal oil input end of the mirror field circulation pump group, and the thermal oil output end of the mirror field circulation pump group is connected to the thermal oil input end of the thermal oil anti-condensation furnace.

[0038] In order to cope with the extremely low temperature environment at night in the plateau, measures such as designing anti-condensation circulation loops and starting anti-condensation furnaces are taken. The mirror field circulation pump group and the thermal oil anti-condensation furnace work together to ensure that the thermal oil temperature is controllable. Even in extreme climates, the system can maintain stable operation, which significantly improves the applicability of the solar thermal power generation system in harsh environments, effectively avoids the problem of system shutdown due to low-temperature solidification of thermal oil, and improves the low-temperature adaptability and reliability of the equipment.

[0039] In an optional embodiment, the condensate module includes a condensate tank and a condensate pump; the water working medium output end of the air cooling island is connected to the water working medium input end of the condensate tank, the condensate tank condenses the input steam into water, the water working medium output end of the condensate tank is connected to the water working medium input end of the condensate pump, and the water working medium output end of the condensate pump is connected to the water working medium input end of the heating and deoxygenation module.

[0040] In an optional embodiment, the heating and deoxygenation module includes a high-pressure heater, a deaerator and a low-pressure heater, the water working medium output end of the condensate pump is connected to the water working medium input end of the low-pressure heater, the water working medium output end of the low-pressure heater is connected to the water working medium input end of the deaerator, the water working medium output end of the deaerator is connected to the water working medium input end of the high-pressure heater, the water working medium output end of the high-pressure heater is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system, and the steam output end of the high-pressure heater is connected to the steam input end of the industrial production energy unit.

[0041] In an optional embodiment, the heat sources of the high-pressure heater and the low-pressure heater are both from the extraction steam of the steam turbine unit; optionally, the extraction steam of the high-pressure heater comes from the high-pressure cylinder or the medium-pressure cylinder of the steam turbine unit, and the extraction steam of the low-pressure heater comes from the medium-pressure cylinder or the low-pressure cylinder of the steam turbine unit.

[0042] In an optional embodiment, the power generation system further includes a desuperheater and a decompressor, the steam output end of the high-pressure heater is connected to the steam input end of the desuperheater and a decompressor, and the steam output end of the desuperheater and a decompressor is connected to the steam input end of the industrial production energy unit. The desuperheater and a decompressor are used to match the steam parameters output by the high-pressure heater with the steam parameters required by the industrial production energy unit.

[0043] In an optional embodiment, the power generation system further includes a second pipeline, which is connected in parallel with the expansion overflow system. A branch circuit with a bypass of the heat transfer oil is designed to maintain normal heat collection or circulation operation when the expansion overflow system fails, thereby improving the system's fault resistance and flexibility.

[0044] In an optional embodiment, the power generation system further includes a thermal oil main pump, and the thermal oil output end of the expansion overflow system and the second pipeline are respectively connected to the thermal oil input end of the thermal oil main pump.

[0045] In an optional embodiment, the power generation system also includes a decoupling water pump, the water working fluid output end of the high-pressure heater is connected to the water working fluid input end of the decoupling water pump, and the water working fluid output end of the decoupling water pump is connected to the water working fluid input end of the decoupling steam generating system.

[0046] In an actual application scenario, the power generation system mainly has the following working conditions: (1) Daytime power generation conditions: Low-temperature heat transfer oil is output from the expansion overflow system, enters the solar collector through the heat transfer oil main pump, and is heated to obtain high-temperature heat transfer oil. The high-temperature heat transfer oil flows into the steam generation system to exchange heat with water to generate steam for driving the steam turbine unit to generate electricity.

[0047] (2) Daytime heat storage conditions: Low-temperature heat transfer oil is output from the expansion overflow system, enters the solar collector through the heat transfer oil main pump and is heated to obtain high-temperature heat transfer oil. The high-temperature heat transfer oil flows into the oil-salt heat exchanger group and exchanges heat with the low-temperature molten salt output from the cold salt tank to obtain low-temperature heat transfer oil and high-temperature molten salt. The low-temperature heat transfer oil is transported to the expansion overflow system, and the high-temperature molten salt is transported to the hot salt tank for heat storage.

[0048] (3) Nighttime heat release condition: Low-temperature heat transfer oil flows from the collector field to the oil-salt heat exchanger group, and exchanges heat with the high-temperature molten salt output from the hot salt tank to obtain high-temperature heat transfer oil and low-temperature molten salt. The high-temperature heat transfer oil is transported to the steam generation system to exchange heat with water to generate steam for driving the steam turbine to generate electricity, and the low-temperature molten salt is transported to the cold salt tank.

[0049] (4) Nighttime mirror field circulation conditions: The low-temperature heat transfer oil enters the solar collector field through the circulation pump group, and then returns from the solar collector field to the circulation pump group to complete the circulation, so as to avoid condensation of the low-temperature heat transfer oil in the pipeline.

[0050] (5) Anti-condensation condition: When the ambient temperature is too low, start the thermal oil anti-condensation furnace. The low-temperature thermal oil flows into the thermal oil anti-condensation furnace through the circulation pump group for heating. The heated thermal oil then flows back from the thermal oil anti-condensation furnace to the circulation pump group to complete the circulation.

[0051] (6) Failure or special operating conditions: When the steam turbine unit or other equipment in the same cycle as the steam turbine unit fails, or when special operating conditions exist, the high-temperature heat transfer oil flows into the decoupled steam generation system to exchange heat with water to generate steam to supply the lithium carbonate processing plant; when the expansion overflow system fails, the heat transfer oil participates in the circulation through the second pipeline.

[0052] It should be noted that the nighttime mirror field circulation condition and the anti-condensation condition can exist at the same time, that is, when the ambient temperature is close to the preset threshold, part of the heat transfer oil enters the heat transfer oil anti-condensation furnace for heating, and part of the heat transfer oil enters the collector field for circulation.

[0053] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A highland multi-energy complementary power generation system based on trough solar thermal, characterized in that: It includes expansion overflow system, solar collector field, oil-salt heat exchanger group, hot salt tank, cold salt tank, decoupled steam generation system, steam generation system, steam turbine unit, air cooling island, condensate module and heating and deoxidation module; The heat transfer oil output end of the expansion overflow system is connected to the heat transfer oil input end of the heat collection field, the high temperature heat transfer oil output end of the heat collection field is connected to the heat transfer oil input end of the steam generation system, and the heat transfer oil output end of the steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The high-temperature heat transfer oil output end of the heat collection field is also connected to the high-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the low-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the expansion overflow system; the low-temperature molten salt input end of the oil-salt heat exchanger group is connected to the cold salt tank, and the high-temperature molten salt output end of the oil-salt heat exchanger group is connected to the hot salt tank; The high-temperature heat transfer oil output end of the heat collection field is also connected to the heat transfer oil input end of the decoupling steam generation system, and the heat transfer oil output end of the decoupling steam generation system is connected to the heat transfer oil input end of the expansion overflow system; The low-temperature heat transfer oil output end of the solar collector field is connected to the low-temperature heat transfer oil input end of the oil-salt heat exchanger group, and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the steam generation system; the high-temperature molten salt input end of the oil-salt heat exchanger group is connected to the hot salt tank, and the low-temperature molten salt output end of the oil-salt heat exchanger group is connected to the cold salt tank; The steam output end of the steam generating system is connected to the steam input end of the steam turbine unit, the steam discharge end of the steam turbine unit is connected to the steam input end of the air cooling island, the water working medium output end of the air cooling island is connected to the water working medium input end of the condensate module, the water working medium output end of the condensate module is connected to the water working medium input end of the heating and deoxygenation module, and the water working medium output end of the heating and deoxygenation module is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system; The steam output end of the decoupling steam generating system and the steam output end of the heating and deoxidation module are both connected to the steam input end of the industrial production energy unit.

2. According to claim 1, a highland multi-energy complementary power generation system based on trough solar thermal is characterized in that: It also includes a first pipeline, and the high-temperature heat transfer oil output end of the oil-salt heat exchanger group is connected to the heat transfer oil input end of the steam generation system through the first pipeline.

3. According to claim 1, a highland multi-energy complementary power generation system based on trough solar thermal is characterized in that: It also includes a loss regeneration system, wherein the high-temperature heat transfer oil output end of the collector field is also connected to the heat transfer oil input end of the loss regeneration system, and the heat transfer oil output end of the loss regeneration system is connected to the heat transfer oil return end of the expansion overflow system.

4. According to claim 1, a highland multi-energy complementary power generation system based on trough solar thermal is characterized in that: It also includes a mirror field circulation pump group, the heat transfer oil output end of the mirror field circulation pump group is connected to the heat transfer oil input end of the solar collector field, and the low-temperature heat transfer oil output end of the solar collector field is connected to the heat transfer oil input end of the mirror field circulation pump group.

5. According to claim 4, a highland multi-energy complementary power generation system based on trough solar thermal is characterized in that: It also includes a heat transfer oil anti-condensation furnace, the heat transfer oil output end of the heat transfer oil anti-condensation furnace is connected to the heat transfer oil input end of the mirror field circulation pump group, and the heat transfer oil output end of the mirror field circulation pump group is connected to the heat transfer oil input end of the heat transfer oil anti-condensation furnace.

6. The highland multi-energy complementary power generation system based on trough solar thermal energy according to claim 1 is characterized in that: The condensate water module includes a condensate water tank and a condensate water pump; the water working medium output end of the air-cooling island is connected to the water working medium input end of the condensate water tank, the water working medium output end of the condensate water tank is connected to the water working medium input end of the condensate water pump, and the water working medium output end of the condensate water pump is connected to the water working medium input end of the heating and deoxygenation module.

7. A highland multi-energy complementary power generation system based on trough solar thermal energy according to claim 6, characterized in that: The heating and deoxygenation module includes a high-pressure heater, a deaerator and a low-pressure heater. The water working medium output end of the condensate pump is connected to the water working medium input end of the low-pressure heater, the water working medium output end of the low-pressure heater is connected to the water working medium input end of the deaerator, the water working medium output end of the deaerator is connected to the water working medium input end of the high-pressure heater, the water working medium output end of the high-pressure heater is respectively connected to the water working medium input end of the steam generating system and the water working medium input end of the decoupling steam generating system, and the steam output end of the high-pressure heater is connected to the steam input end of the industrial production energy unit.

8. The highland multi-energy complementary power generation system based on trough solar thermal energy according to claim 7 is characterized in that: The heat sources of the high-pressure heater and the low-pressure heater are both from the extraction steam of the steam turbine unit.

9. The highland multi-energy complementary power generation system based on trough solar thermal energy according to claim 8 is characterized in that: It also includes a temperature reducing and pressure reducing device, wherein the steam output end of the high-pressure heater is connected to the steam input end of the temperature reducing and pressure reducing device, and the steam output end of the temperature reducing and pressure reducing device is connected to the steam input end of the industrial production energy unit.

10. A highland multi-energy complementary power generation system based on trough solar thermal energy according to any one of claims 1 to 9, characterized in that: Also included is a second pipeline connected in parallel with the expansion and overflow system.

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