Power generation system

Abstract

The utility model discloses a power generation system which comprises a heliostat field, a concentrating photovoltaic power generation module and a tower type photo-thermal power generation module. The heliostat field comprises a plurality of heliostats; the heliostat field is used for reflecting sunlight to a heat absorber and a concentrating photovoltaic power generation module in the tower type photo-thermal power generation module; or the heliostat field is used for reflecting sunlight to the concentrating photovoltaic power generation module; the sunlight reflected by the heliostat field comprises first preset wave band light and second preset wave band light; the concentrating photovoltaic power generation module is configured to absorb light of a first preset wave band for power generation and reflect light of a second preset wave band to a heat absorber in the tower type photo-thermal power generation module; the output end of a low-temperature water working medium storage tank in the tower type photo-thermal power generation module communicates with a preset heat dissipation channel in the concentrating photovoltaic power generation module so as to reduce the temperature of the concentrating photovoltaic power generation module. The sunlight is subjected to wave band processing through the concentrating photovoltaic power generation module, full-wave-band and targeted utilization of the sunlight is achieved, and energy utilization is more efficient.

Description

Technical Field

[0001] This utility model belongs to the field of power generation technology, and in particular relates to a power generation system. Background Technology

[0002] Before reaching the Earth's surface, sunlight must pass through the atmosphere. Atmospheric gases (such as oxygen, ozone, water vapor, and carbon dioxide) selectively absorb different wavelengths of sunlight, resulting in a usable solar radiation range of approximately 300nm-2500nm. Currently, photovoltaic cells can effectively utilize solar radiation in the wavelength range of approximately 300nm-800nm, which accounts for about 57% of solar radiation energy. The remaining wavelength range (800nm-2500nm) accounts for about 43% of the total solar radiation energy. This remaining wavelength not only fails to excite photovoltaic cells to generate current but also causes them to overheat. Excessive heat in photovoltaic cells negatively impacts their photoelectric conversion efficiency. Therefore, improving the utilization rate of solar energy and preventing photovoltaic cells from overheating are urgent problems to be solved. Utility Model Content

[0003] To address the aforementioned problems, the purpose of this invention is to provide a power generation system that enables targeted utilization of the entire spectrum of sunlight. This system not only effectively improves the utilization rate of solar energy but also effectively solves the problem of reduced photoelectric conversion efficiency of photovoltaic cells due to excessively high temperatures.

[0004] The technical solution provided by this utility model is: a power generation system, including a heliostat field, a concentrated photovoltaic power generation module and a tower-type solar thermal power generation module;

[0005] The heliostat field includes a plurality of heliostats; the heliostat field is used to reflect sunlight to the receiver in the tower-type solar thermal power generation module and the concentrating photovoltaic power generation module; or, the heliostat field is used to reflect sunlight to the concentrating photovoltaic power generation module;

[0006] The sunlight reflected by the heliostat field includes light of a first preset wavelength band and light of a second preset wavelength band.

[0007] The concentrated photovoltaic power generation module is configured to absorb light of the first preset wavelength band to generate electricity, and to reflect light of the second preset wavelength band to the heat absorber in the tower-type solar thermal power generation module.

[0008] The output end of the low-temperature water medium storage tank in the tower-type solar thermal power generation module is connected to the preset heat dissipation channel in the concentrated photovoltaic power generation module to reduce the temperature of the concentrated photovoltaic power generation module.

[0009] Preferably, the concentrated photovoltaic power generation module includes a filter component, a photovoltaic module, and a module backsheet, wherein the filter component is disposed on the light-receiving side of the photovoltaic module, and the module backsheet is disposed on the backlight side of the photovoltaic module;

[0010] The filter component can transmit the first preset wavelength light and reflect the second preset wavelength light onto the heat absorber;

[0011] The first preset wavelength light passing through the filter component can reach the photovoltaic component to convert the energy in the first preset wavelength light into electrical energy;

[0012] The heat dissipation channel is provided in the back panel of the component, and the low-temperature water working medium in the low-temperature water working medium storage tank enters the heat dissipation channel to reduce the temperature of the photovoltaic module.

[0013] Preferably, the component backplate includes a heat-conducting plate, and the heat dissipation channel is a heat dissipation coil disposed in the heat-conducting plate. The heat dissipation coil includes a cooling water inlet and a cooling water outlet. The cooling water inlet is connected to the output end of the low-temperature water working medium storage tank in the tower solar thermal power generation module, and the cooling water outlet is connected to the input end of the high-temperature water working medium storage tank in the tower solar thermal power generation module.

[0014] Preferably, the wavelength of the first preset wavelength light transmitted through the filter component is 300nm-800nm, and the wavelength of the second preset wavelength light reflected by the filter component is greater than 800nm.

[0015] Preferably, the tower-type solar thermal power generation module includes:

[0016] A heat absorber is used to absorb the second preset wavelength light reflected by the concentrated photovoltaic power generation module;

[0017] A heat storage medium circulation system is connected to the heat absorber, and the heat storage medium is configured to absorb heat in the heat absorber;

[0018] In the steam generation system, the heat storage medium, after absorbing heat, exchanges heat with the water working fluid in the steam generation system;

[0019] A water-based circulating system is connected to the steam generation system to enable the heat storage medium to heat the water-based medium in the steam generation system to generate steam.

[0020] A steam turbine generator set, wherein the steam drives the steam turbine generator set to generate electricity.

[0021] Preferably, the heat storage medium circulation system includes a low-temperature heat storage medium tank and a high-temperature heat storage medium tank. The output end of the low-temperature heat storage medium tank is connected to the input end of the heat absorber, the output end of the heat absorber is connected to the input end of the high-temperature heat storage medium tank, the output end of the high-temperature heat storage medium tank is connected to the heat storage medium input end of the steam generation system, and the heat storage medium output end of the steam generation system is connected to the input end of the low-temperature heat storage medium tank.

[0022] The water circulation system includes a low-temperature water storage tank and a high-temperature water storage tank. The output end of the low-temperature water storage tank is connected to the inlet of the preset heat dissipation channel, the input end of the high-temperature water storage tank is connected to the outlet of the preset heat dissipation channel, the output end of the high-temperature water storage tank is connected to the water input end of the steam generation system, the water output end of the steam generation system is connected to the steam input end of the steam turbine generator set, and the water output end of the steam turbine generator set is connected to the input end of the low-temperature water storage tank.

[0023] Preferably, the heat absorber is a cavity heat absorber.

[0024] Preferably, the concentrated photovoltaic power generation module is mounted on a concentrated photovoltaic support, and the heat absorber in the tower-type solar thermal power generation module is mounted on a heat absorption tower.

[0025] Preferably, the back panel of the concentrated photovoltaic power generation module further includes a heat insulation material layer, which is disposed on the side of the heat-conducting plate opposite to the photovoltaic module.

[0026] Because of the adoption of the above technical solution, this utility model has the following advantages and positive effects compared with the prior art:

[0027] 1. In the technical solution provided by this utility model, the concentrated photovoltaic power generation module can not only generate electricity using the first preset wavelength light in the sunlight projected onto its surface by the heliostat field, but also filter and reflect the second preset wavelength light in the sunlight projected onto its own surface by the heliostat field, thereby preventing the photovoltaic cells in the concentrated photovoltaic power generation module from overheating due to the heating of the second preset wavelength light.

[0028] 2. In the technical solution provided by this utility model, the concentrated photovoltaic power generation module reflects the second preset wavelength light onto the absorber in the tower solar thermal power generation module, thereby enabling the tower solar thermal power generation module to utilize the energy in the second preset wavelength light and improving the utilization rate of solar energy.

[0029] 3. This utility model also utilizes the low-temperature water medium in the tower-type solar thermal power generation module to cool the concentrated photovoltaic power generation module, ensuring that the temperature of the concentrated photovoltaic power generation module is within the desired range. This not only solves the problem of mismatched operating temperatures between photovoltaic and solar thermal power generation in the prior art, but also achieves the beneficial transfer of unwanted heat (heat from the concentrated photovoltaic power generation module). This ensures the normal operation of the concentrated photovoltaic power generation module and effectively utilizes the heat emitted by the concentrated photovoltaic power generation module through the tower-type solar thermal power generation module, thereby further improving the energy utilization efficiency of the entire power generation system. Attached Figure Description

[0030] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, wherein:

[0031] Figure 1 This is a schematic diagram of the power generation system of this utility model;

[0032] Figure 2 This is a cross-sectional schematic diagram of the concentrated photovoltaic power generation module of this utility model;

[0033] Figure 3 This is a schematic diagram of the heat-conducting plate structure of the concentrated photovoltaic power generation module of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 1-Heliostat field, 2-Concentrated photovoltaic power generation module, 3-Module backsheet, 4-Concentrated photovoltaic support, 5-Absorber, 6-Absorber tower, 7-Low-temperature thermal storage medium tank, 8-High-temperature thermal storage medium tank, 9-Steam generation system, 10-Steam turbine generator set, 11-Low-temperature water working medium tank, 12-High-temperature water working medium tank, 13-Heat conduction plate, 14-Filter module, 15-Photovoltaic module, 16-Cooling water inlet, 17-Cooling water outlet, 18-Insulation material layer, 19-Heat dissipation coil. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become clearer from the following description and claims. It should be noted that the drawings are all in a very simplified form and use non-precise ratios, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] First Embodiment

[0039] like Figure 1 As shown, a power generation system is illustrated, comprising: a heliostat field 1, a concentrated photovoltaic power generation module 2, and a tower-type solar thermal power generation module;

[0040] The heliostat field 1 includes several heliostats; the heliostat field 1 is used to reflect sunlight to the receiver and the concentrating photovoltaic power generation module 2 in the tower solar thermal power generation module; or, the heliostat field 1 is used to reflect sunlight to the concentrating photovoltaic power generation module 2.

[0041] The sunlight reflected by the heliostat field 1 includes light in the first preset wavelength band and light in the second preset wavelength band;

[0042] The concentrated photovoltaic power generation module 2 is configured to absorb light of the first preset wavelength band to generate electricity, and to reflect light of the second preset wavelength band to the absorber of the tower-type solar thermal power generation module.

[0043] In this configuration, the output end of the low-temperature water medium storage tank 11 in the tower-type solar thermal power generation module is connected to the preset heat dissipation channel in the concentrated photovoltaic power generation module 2 to reduce the temperature of the concentrated photovoltaic power generation module 2.

[0044] In the technical solution of this embodiment, the concentrated photovoltaic power generation module 2 filters the sunlight by wavelength and generates electricity based on the first preset wavelength (if the temperature of the photovoltaic module 15 is too high, the power generation efficiency of the photovoltaic module 15 will be reduced. The photovoltaic module 15 in the concentrated photovoltaic power generation module 2 has higher power generation efficiency and is less prone to overheating based on the first preset wavelength). The second preset wavelength is reflected to the tower solar thermal power generation module (the second preset wavelength has higher solar thermal efficiency), so as to realize the full-band and targeted utilization of sunlight, and the energy utilization is more efficient.

[0045] This invention employs a concentrated photovoltaic (PV) module 2, which boasts higher photoelectric efficiency than conventional PV modules 15. This requires high-quality photovoltaic materials; in some embodiments, gallium arsenide (GaAs) solar cells are used, capable of withstanding a higher concentration ratio. Gallium arsenide has a bandgap energy of 1.42 eV, meaning only photons with wavelengths of 870 nm and below have sufficient energy to excite electrons in the material and generate current. In practical applications, GaAs solar cells can effectively utilize the solar spectrum in the range of approximately 300 nm to 800 nm, which accounts for about 57% of solar radiation energy. The remaining wavelength range of sunlight (800 nm to 2500 nm) accounts for approximately 43% of the total solar radiation energy. This portion not only fails to excite GaAs solar cells to generate current but also causes them to heat up. The photoelectric efficiency of PV module 15 decreases with increasing temperature; generally, for every 1°C increase in temperature, the photoelectric efficiency decreases by approximately 0.3%. Therefore, this embodiment also utilizes the low-temperature water medium in the tower solar thermal power generation module to cool the concentrating photovoltaic power generation module 2 to ensure that the temperature of the concentrating photovoltaic power generation module 2 is within the desired range. This not only solves the problem of mismatch between the working temperatures of photovoltaic and solar thermal in the prior art, but also realizes the beneficial transfer of unwanted heat (the heat of the concentrating photovoltaic power generation module 2). This ensures the normal operation of the concentrating photovoltaic power generation module 2 and improves the power generation of the tower solar thermal power generation module, thereby further improving the system's energy utilization efficiency.

[0046] Preferred, see Figure 2 and Figure 3 The concentrated photovoltaic power generation module 2 includes a filter component 14, a photovoltaic module 15, and a module backplate 3. The filter component 14 is disposed on the light-receiving side of the photovoltaic module 15, and the module backplate 3 is disposed on the backlight side of the photovoltaic module 15. The filter component 14 can transmit light of a first preset wavelength band and reflect light of a second preset wavelength band to the heat absorber. The first preset wavelength band light transmitted through the filter component 14 can reach the photovoltaic module 15 to convert the energy in the first preset wavelength band light into electrical energy.

[0047] The back panel 3 of the module is equipped with a heat dissipation channel, and the low-temperature water working medium in the low-temperature water working medium storage tank enters the heat dissipation channel to reduce the temperature of the photovoltaic module.

[0048] In this embodiment, the photovoltaic module 15 generates electricity efficiently based on filtered light of a first preset wavelength. A heat dissipation channel is provided in the module backplane 3 to effectively control the temperature of the photovoltaic module 15, ensuring its safe operation and high power generation efficiency. The filter component 14 is preferably a filter glass capable of filtering and reflecting light of a specific wavelength.

[0049] Preferably, the component backplate 3 includes a heat-conducting plate 13, and the heat dissipation channel is a heat dissipation coil 19 disposed in the heat-conducting plate 13. The heat dissipation coil 19 includes a cooling water inlet 16 and a cooling water outlet 17. The cooling water inlet 16 is connected to the output end of the low-temperature water working medium storage tank 11 in the tower solar thermal power generation module, and the cooling water outlet 17 is connected to the input end of the high-temperature water working medium storage tank 12 in the tower solar thermal power generation module.

[0050] This embodiment provides a specific implementation of the heat dissipation channel. For example, a heat dissipation coil 19 is provided in the heat-conducting plate 13. The heat-conducting plate 13 can be made of a high thermal conductivity metal material such as copper. The cooling water inlet 16 is connected to the output end of the low-temperature water working medium storage tank 11. The low-temperature water working medium enters the heat dissipation coil 19 to remove heat and then flows into the high-temperature water working medium storage tank 12. This scheme can not only remove the unwanted heat of the photovoltaic module 15, but also apply this unwanted heat of the photovoltaic module 15 to the tower solar thermal power generation module in the form of high-temperature water working medium, thereby improving the energy utilization efficiency of the entire system.

[0051] Preferably, the wavelength of the first preset wavelength light transmitted through the light filtering component 14 is 300nm-800nm, and the wavelength of the second preset wavelength light reflected by the light filtering component 14 is greater than 800nm.

[0052] The photovoltaic module 15 used in this embodiment is made of gallium arsenide. The first preset wavelength light filtered by the corresponding filter module 14 is 300nm-800nm. The second preset wavelength light, which is greater than 800nm, is reflected to the absorber of the tower solar thermal power generation module. Of course, if other materials such as gallium nitride or indium gallium phosphide are used for the photovoltaic module 15, then the filter module 14 with the corresponding filtering wavelength is used.

[0053] Preferably, the tower-type concentrated solar power (CSP) module includes:

[0054] Heat absorber 5 is used to absorb the second preset wavelength light reflected by the concentrating photovoltaic power generation module 2;

[0055] A heat storage medium circulation system is connected to the heat absorber 5, and the heat storage medium is configured to absorb heat in the heat absorber 5;

[0056] In the steam generation system 9, the heat storage medium, after absorbing heat, exchanges heat with the water working fluid.

[0057] The water working fluid circulation system is connected to the steam generation system 9 to realize the heating of the water working fluid by the heat storage medium in the steam generation system 9 to generate steam;

[0058] Steam turbine generator set 10, steam drives steam turbine generator set 10 to generate electricity.

[0059] Preferably, the heat storage medium circulation system includes a low-temperature heat storage medium tank 7 and a high-temperature heat storage medium tank 8. The output end of the low-temperature heat storage medium tank 7 is connected to the input end of the heat absorber 5, the output end of the heat absorber 5 is connected to the input end of the high-temperature heat storage medium tank 8, the output end of the high-temperature heat storage medium tank 8 is connected to the heat storage medium input end of the steam generating system 9, and the heat storage medium output end of the steam generating system 9 is connected to the input end of the low-temperature heat storage medium tank 7. The water working medium circulation system includes a low-temperature water working medium tank 11 and a high-temperature water working medium tank 12. The output end of the low-temperature water working medium tank 11 is connected to the inlet of the preset heat dissipation channel, the input end of the high-temperature water working medium tank 12 is connected to the outlet of the preset heat dissipation channel, the output end of the high-temperature water working medium tank 12 is connected to the water working medium input end of the steam generating system 9, the water working medium output end of the steam generating system 9 is connected to the steam input end of the steam turbine generator set 10, and the steam output end of the steam turbine generator set 10 is connected to the input end of the low-temperature water working medium tank 11.

[0060] In this embodiment, the output end of the low-temperature water medium storage tank 11 is connected to the inlet of the preset heat dissipation channel in the concentrated photovoltaic power generation module 2, and the input end of the high-temperature water medium storage tank 12 is connected to the outlet of the preset heat dissipation channel in the concentrated photovoltaic power generation module 2. This enables the water medium that absorbs a certain amount of heat from the concentrated photovoltaic power generation module 2 to be stored in the high-temperature water medium storage tank 12, and then participates in heat exchange with the steam generator to generate steam and generate electricity, thus achieving full utilization of heat.

[0061] Preferably, the heat absorber 5 is a cavity heat absorber.

[0062] This embodiment provides a preferred solution, in which the heat absorber 5 adopts a cavity heat absorber. The cavity heat absorber can more fully absorb the second preset band light reflected by the concentrating photovoltaic power generation module 2, thereby improving the power generation efficiency of the entire power generation system.

[0063] Preferably, the concentrating photovoltaic power generation module 2 is mounted on the concentrating photovoltaic support 4, and the heat absorber 5 in the tower-type solar thermal power generation module is mounted on the heat absorption tower 6.

[0064] In this embodiment, the concentrating photovoltaic power generation module 2 is mounted on the concentrating photovoltaic support 4, and the heat absorber 5 is mounted on the heat absorption tower 6. This allows the heliostats in the heliostat field 1 to more easily reflect sunlight onto the concentrating photovoltaic power generation module 2, and further allows the filter component 14 to more easily reflect the second preset wavelength light onto the heat absorber 5. Moreover, by mounting the heat absorber 5 on the heat absorption tower 6, the heliostats in the heliostat field 1 can also more easily and directly reflect sunlight onto the heat absorber 5.

[0065] Preferably, the backplate 3 of the concentrated photovoltaic power generation module 2 further includes a heat insulation material layer 18, which is disposed on the side of the heat-conducting plate 13 away from the photovoltaic module.

[0066] In this embodiment, by setting the heat insulation material layer 18, the heat conduction plate 13 can be kept warm, so that the heat will not be lost ineffectively, but will be absorbed by the low temperature water working fluid in the tower solar thermal power generation module, thereby further improving the overall energy utilization rate of the system.

[0067] The operation method of the power generation system in the above embodiments will be further described below, including the following steps:

[0068] The reflected light from all the heliostats in the heliostat field 1 is projected onto the concentrated photovoltaic power generation module 2; or, the reflected light from the first part of the heliostats in the heliostat field 1 is projected onto the concentrated photovoltaic power generation module 2, and the reflected light from the second part of the heliostats in the heliostat field 1 is projected onto the receiver in the tower solar thermal power generation module.

[0069] The concentrated photovoltaic power generation module 2 absorbs the first preset wavelength light in the reflected light of the heliostat field 1 to generate electricity. In addition, the concentrated photovoltaic power generation module 2 also reflects the second preset wavelength light in the reflected light of the heliostat field 1 to the heat absorber of the tower solar thermal power generation module.

[0070] The tower-type solar thermal power generation module absorbs light of the second preset wavelength band to convert light energy into heat energy; or, the absorber in the tower-type solar thermal power generation module absorbs the reflected light from the second part of the heliostat and the second preset wavelength band light to convert light energy into heat energy.

[0071] In this process, the low-temperature water medium in the low-temperature water medium storage tank 11 of the tower-type solar thermal power generation module is transported to the preset heat dissipation channel in the concentrated photovoltaic power generation module 2, so as to reduce the temperature of the concentrated photovoltaic power generation module 2 by utilizing the low-temperature water medium.

[0072] In some embodiments, during the daytime, the heliostat field 1 reflects sunlight to the concentrating photovoltaic power generation module 2 based on the amount of solar energy required for the module to operate at maximum power, enabling the module to generate electricity and feed it into the grid at maximum power. The low-temperature water medium in the tower-type solar thermal power generation module carries away the heat generated by the photovoltaic module 15 through the module backplate 3 and stores it in the high-temperature water medium storage tank 12. The heat absorber 5 absorbs the sunlight of the second preset wavelength reflected by the filter module 14 and the sunlight directly reflected by the heliostats in the heliostat field 1 for heat collection, and stores this heat in a high-temperature heat storage medium tank through a heat storage medium, which can be molten salt (such as a molten mixture of sodium nitrate and potassium nitrate), liquid metal, etc. The high-temperature thermal storage medium in the high-temperature thermal storage medium tank and the high-temperature water working medium in the high-temperature water working medium tank 12 are input into the steam generation system 9 according to the flow rate required for the tower solar thermal power generation module to operate at the minimum load. This allows the steam generation system 9 and the steam turbine generator set 10 to operate at the minimum load. This operating mode ensures that the concentrated photovoltaic power generation module and the tower solar thermal power generation module do not stop. On the other hand, it allows the concentrated photovoltaic power generation module 2 to output as much power as possible during the daytime, while the tower solar thermal power generation module can utilize the thermal storage medium circulation system to store heat as much as possible during the daytime.

[0073] During peak electricity consumption periods in the morning and evening, the concentrated photovoltaic power generation module 2 operates at maximum power to generate electricity and connect to the grid, while the tower solar thermal power generation module utilizes the thermal energy stored in the heat storage medium circulation system to operate at maximum power to generate electricity and connect to the grid, participating in the peak shaving of the power grid.

[0074] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific identification content executed by the system and device described above can be referred to the corresponding process in the foregoing method embodiments.

[0075] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments. Even if various changes are made to the present invention, if these changes fall within the scope of the claims of the present invention and their equivalents, they shall still fall within the protection scope of the present invention.

Claims

1. A power generation system, characterized by, The system comprises a heliostat field, a concentrated photovoltaic power generation module and a tower type photo-thermal power generation module; The heliostat field comprises a plurality of heliostats, and is configured to reflect sunlight to a heat absorber in the tower type photo-thermal power generation module and the concentrated photovoltaic power generation module, or to the concentrated photovoltaic power generation module; The sunlight reflected by the heliostat field comprises first preset wavelength band light and second preset wavelength band light; The concentrated photovoltaic power generation module is configured to absorb the first preset wavelength band light to generate electricity and reflect the second preset wavelength band light to the heat absorber in the tower type photo-thermal power generation module; The output end of a low-temperature water working medium storage tank in the tower type photo-thermal power generation module is connected to a preset heat dissipation channel in the concentrated photovoltaic power generation module to reduce the temperature of the concentrated photovoltaic power generation module.

2. The power generation system of claim 1, wherein, The concentrated photovoltaic power generation module comprises a light filtering assembly, a photovoltaic assembly and an assembly backboard, the light filtering assembly is arranged on the light receiving side of the photovoltaic assembly, and the assembly backboard is arranged on the back side of the photovoltaic assembly; The light filtering assembly can transmit the first preset wavelength band light and reflect the second preset wavelength band light to the heat absorber; The first preset wavelength band light transmitted through the light filtering assembly can reach the photovoltaic assembly to convert the energy in the first preset wavelength band light into electrical energy; The assembly backboard is provided with the heat dissipation channel, and the low-temperature water working medium in the low-temperature water working medium storage tank enters the heat dissipation channel to reduce the temperature of the photovoltaic assembly.

3. The power generation system of claim 2, wherein, The assembly backboard comprises a heat conducting plate, the heat dissipation channel is a heat dissipation coil pipe arranged in the heat conducting plate, the heat dissipation coil pipe comprises a cooling water inlet and a cooling water outlet, the cooling water inlet is connected to the output end of the low-temperature water working medium storage tank in the tower type photo-thermal power generation module, and the cooling water outlet is connected to the input end of a high-temperature water working medium storage tank in the tower type photo-thermal power generation module.

4. The power generation system of claim 2, wherein, The wavelength band of the first preset wavelength band light transmitted through the light filtering assembly is 300-800 nm, and the wavelength band of the second preset wavelength band light reflected by the light filtering assembly is greater than 800 nm.

5. The power generation system of claim 1, wherein, The tower type photo-thermal power generation module comprises: a heat absorber configured to absorb the second preset wavelength band light reflected by the concentrated photovoltaic power generation module; a heat storage medium circulation system connected to the heat absorber, and a heat storage medium configured to absorb heat in the heat absorber; a steam generation system configured to exchange heat between the heat storage medium and a water working medium in the steam generation system; a water working medium circulation system connected to the steam generation system to heat the water working medium in the steam generation system by the heat storage medium to generate steam; a steam turbine generator set driven by the steam to generate electricity.

6. The power generation system of claim 5, wherein, The heat storage medium circulation system comprises a low-temperature heat storage medium storage tank and a high-temperature heat storage medium storage tank, an output end of the low-temperature heat storage medium storage tank is communicated with an input end of the heat absorber, an output end of the heat absorber is communicated with an input end of the high-temperature heat storage medium storage tank, an output end of the high-temperature heat storage medium storage tank is communicated with a heat storage medium input end of the steam generation system, and a heat storage medium output end of the steam generation system is communicated with an input end of the low-temperature heat storage medium storage tank; The water working medium circulation system comprises a low-temperature water working medium storage tank and a high-temperature water working medium storage tank, an output end of the low-temperature water working medium storage tank is communicated with an inlet of the preset heat dissipation channel, an input end of the high-temperature water working medium storage tank is communicated with an outlet of the preset heat dissipation channel, an output end of the high-temperature water working medium storage tank is communicated with a water working medium input end of the steam generation system, a water working medium output end of the steam generation system is communicated with a steam input end of the steam turbine generator unit, and a water working medium output end of the steam turbine generator unit is communicated with an input end of the low-temperature water working medium storage tank.

7. The power generation system of claim 5, wherein, The heat absorber is a cavity heat absorber.

8. The power generation system of claim 1, wherein, The concentrated photovoltaic power generation module is arranged on a concentrated photovoltaic support, and the heat absorber in the tower type photo-thermal power generation module is arranged on a heat absorption tower.

9. The power generation system of claim 3, wherein, The assembly backboard of the concentrated photovoltaic power generation module further comprises a heat insulation material layer arranged on a side of the heat conduction plate away from the photovoltaic assembly.

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