Self-powered heliostat using thin film photovoltaics

Abstract

The utility model belongs to the technical field of heliostats, and particularly relates to a self-powered heliostat using thin-film photovoltaic, which comprises a heliostat, a charging and discharging device, a storage battery pack, a curved-surface photovoltaic support structure and a thin-film photovoltaic panel, the heliostat comprises a reflecting mirror, a driving motor, a torque beam and a supporting column arranged on the torque beam, a thin film type photovoltaic panel is adhered to the outside of the curved surface photovoltaic supporting structure, and the curved surface photovoltaic supporting structure is electrically connected with the charging and discharging device and used for absorbing sunlight at any angle, converting the sunlight into electric energy, driving the heliostat to operate and storing redundant electric energy to achieve self power supply. The problems that a traditional heliostat is low in energy utilization rate, depends on cable power supply, is high in construction and maintenance cost and the like are solved, good economical efficiency and environmental friendliness are achieved, energy loss caused by angle change of a traditional photovoltaic panel is effectively avoided through the design of the curved-surface photovoltaic supporting structure and the thin-film photovoltaic panel, external cable power supply is not needed, and the application range is wide. Wiring is simplified, and construction and maintenance cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to heliostat technical field, more particularly, it relates to a kind of self-powered heliostat using thin film photovoltaic. BACKGROUND

[0002] Tower solar thermal power generation technology is an advanced technology that utilizes solar thermal energy for power generation, with its core features being high thermal efficiency and excellent grid regulation capability. It not only provides clean energy but also enables active and reactive power regulation and inertia support. This technology has been widely applied globally, particularly in large-scale renewable energy power generation. The core component of a tower solar thermal power generation system is the heliostat field, which precisely tracks sunlight by controlling thousands of heliostats, focusing sunlight onto a receiver at the top of a heat collection tower. The receiver absorbs and transfers heat through a medium (such as molten salt) to drive a generator set for power generation.

[0003] Traditional heliostats are composed of a reflector, a support structure, and a drive system, responsible for precisely focusing sunlight onto a receiver at the top of a heat collection tower by adjusting the angle of the reflector. The drive system typically includes a motor and a control device, powered by external cables, which adjusts the angle of the reflector in real time based on the position of the sun. Power is distributed to each heliostat through a central power control station via cables, driving its normal operation. The control device uses tracking algorithms to calculate the solar azimuth angle, coordinating the movement of all heliostats to concentrate solar energy onto the receiver.

[0004] In this system, power supply and control accuracy directly determine the operational efficiency of the heliostat field. However, this traditional design has several issues:

[0005] 1. Inability to fully utilize multi-angle sunlight: Traditional heliostat photovoltaic panels are often fixed at a single angle on the back or side of the reflector, unable to capture multi-angle sunlight. Especially in early morning or late afternoon or low light conditions, the utilization rate of traditional photovoltaic panels is low, leading to a decrease in overall system efficiency.

[0006] 2. High energy consumption due to complex structure: The drive motor and control system of the heliostat rely on external cable power supply, and the large-area cable laying brings high energy consumption problems. Energy is lost during power transmission, increasing the plant power rate and adversely affecting overall energy storage efficiency.

[0007] 3. High construction cost: The coverage area of a heliostat field is usually measured in square kilometers, and each heliostat needs to be connected to the power control center through underground cables. This design requires a large amount of cable trench construction, with a long construction period and high cost. At the same time, cable materials and labor costs significantly increase the overall investment of the power plant.

[0008] 4. Maintenance difficulty: the cable lines distributed in the heliostat field are complex and scattered, and any line failure will cause a large number of power supply interruptions. In the vast mirror field, locating and repairing these failures not only takes a long time, but also requires additional manpower and technical investment, greatly increasing the difficulty and cost of later maintenance.

[0009] Therefore, how to reduce the plant power rate of the tower type photo-thermal power station, while reducing the external cable and related civil work load, has become an important technical problem to be solved at present. Utility model content

[0010] The utility model provides a kind of self-powered heliostat using thin film photovoltaic for the deficiency of prior art, adopts thin film photovoltaic to charge battery using sunlight, provides power supply for heliostat driving system, realizes self-powered function, reduces power station plant power rate, improves power generation efficiency, reduces power generation cost, and the redundant function of thin film photovoltaic power generation on heliostat equipment can ensure continuous power supply for power station when heliostat component fails.

[0011] To achieve the above technical purpose, the utility model will adopt the following technical scheme:

[0012] A kind of self-powered heliostat using thin film photovoltaic, including heliostat, charge and discharge device, battery pack, curved surface photovoltaic support structure and thin film photovoltaic board;The heliostat includes reflector, drive motor, torque beam and support column arranged on torque beam;The curved surface photovoltaic support structure is fixed at the outside of the support column, and its outer surface is mounted with the thin film photovoltaic board;

[0013] The thin film photovoltaic board is electrically connected with the charge and discharge device, for receiving sunlight and converting it into electric energy to power the charge and discharge device, and the charge and discharge device is connected with drive motor and battery pack respectively, for powering drive motor and / or charging battery pack.

[0014] In preferred implementation mode, further, thin film photovoltaic board area=helioscope daily power consumption / (average daily solar radiation amount x photovoltaic board photoelectric efficiency).

[0015] In preferred implementation mode, further, the support column is hollow structure, and charge and discharge device and battery pack are arranged in the inside, the side wall of the support column is provided with opening, and the charge and discharge device and battery pack are mounted in the inside of the support column through the opening.

[0016] In preferred implementation mode, further, the torque beam is provided with fastener, the fastener has outer threaded hole, the support column is provided with threaded hole matched with the fastener, and the support column is provided with inner threaded hole matched with the fastener.

[0017] In the preferred implementation, further, the reflector comprises a first reflector and a second reflector distributedly mounted on the top of the purlin, the first reflector being arranged around the second reflector; the center of the second reflector is provided with a through hole, one end of the support column is mounted on the top of the torque beam, and the other end passes through the through hole of the second reflector.

[0018] In the preferred implementation, further, the curved photovoltaic support structure to which the thin-film photovoltaic panel is adhered is one of a sphere, a cylinder, an ellipsoid, a cone, a hemisphere or a polyhedron, and is welded on the support column in a spatially uniform manner.

[0019] In the preferred implementation, further, the heliostat further comprises a cable, the cable being distributed on the top and bottom of the purlin, the edges of the top and bottom of the purlin being respectively provided with a plurality of cable fixing points; the support column is provided with a cable connector, and the bottom of the torque beam is provided with a traction column, the traction column being provided with a cable connector.

[0020] In the preferred implementation, further, the cables located on the top surface of the purlin are gathered and connected from the edges of the purlin to the cable connectors of the support column, and the cables located on the bottom surface of the purlin are gathered and connected from the edges of the purlin to the cable connectors on the traction column.

[0021] In the preferred implementation, further, the central axes of the support column, the curved photovoltaic support structure and the fastener are collinear.

[0022] In the preferred implementation, further, the surface of the thin-film photovoltaic panel is coated with an anti-reflection coating and a hydrophobic coating.

[0023] The beneficial effects of the present application are as follows:

[0024] Firstly, the present application realizes efficient absorption and power generation of sunlight at any angle by the design that the thin-film photovoltaic panel is adhered to the curved photovoltaic support structure, avoiding the energy loss caused by angle change of traditional flat photovoltaic panels; in combination with the charge and discharge device and the battery pack built in the hollow support column, an integrated self-power supply system is formed, which can supply power to the driving motor without external cables, simplifying the construction wiring and reducing the installation and maintenance costs. At the same time, the storage function of excess electric energy ensures the continuous operation of the system in rainy weather or insufficient light conditions, improves the stability and reliability of the heliostat, reduces energy consumption, and has good economic efficiency and environmental friendliness.

[0025] Second, in the preferred implementation, the utility model discloses through the accurate calculation of " thin film photovoltaic panel area = heliostat daily power consumption / ( average daily solar radiation amount * photovoltaic panel photoelectric efficiency) ", can according to actual demand, the area of thin film photovoltaic panel is rationally designed, thereby maximumly reduces the material usage under the premise of guaranteeing the self power supply demand of heliostat, and optimizes the cost.

[0026] Third, in the preferred implementation, the utility model discloses through setting the open structure on the side wall of support column, makes the charging and discharging device and battery pack can be conveniently installed in the inside of support column, not only effectively avoids the erosion of rain, dust and sunlight, prolongs the service life of equipment, simultaneously improves the installation and maintenance convenience of equipment. The open design also reduces the complexity of external structure, reduces the overall construction and maintenance cost.

[0027] Fourth, in the preferred implementation, the utility model discloses through setting the fastener with external thread on the top of torque beam, cooperates with the internal thread hole equipped on support column, realizes the reliable connection of support column and torque beam, and the structure is simple and convenient to assemble.

[0028] Fifth, in the preferred implementation, the through hole design of the center of second mirror of the utility model makes support column can be installed through, and is combined with the center of curved surface photovoltaic support structure, forms the stable central axis support structure, ensures the stability and wind resistance of overall system.

[0029] Sixth, in the preferred implementation, the utility model discloses through distributing the cable on the top and bottom of purline and connecting it to the cable connector of support column and traction column respectively, forms the multi-point stress structure, effectively improves the wind resistance and structural stability of heliostat. Meanwhile, through the design of the central axis of support column, curved surface photovoltaic support structure and fastener as collinear, the mechanical distribution of structure is optimized, and the gravity center of system is more stable, further improves the overall wind resistance and structural reliability.

[0030] Seventh, in the preferred implementation, the utility model discloses through coating the anti-reflection coating and hydrophobic coating on the surface of thin film photovoltaic panel, improves the photoelectric conversion efficiency and environmental adaptability of photovoltaic panel. The anti-reflection coating reduces the light reflection loss, and improves the absorption efficiency of solar energy. The hydrophobic coating effectively prevents the adhesion of dust, rain and pollutants, reduces the cleaning frequency and maintenance cost, ensures the stability of photovoltaic panel in long-term outdoor environment, further prolongs the service life and improves the overall power generation efficiency of system. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is the front view of the self power supply heliostat of the embodiment of the utility model using thin film photovoltaic;

[0032] Figure 2is the principle diagram of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model;

[0033] Figure 3 is the three-dimensional structure diagram of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model;

[0034] Figure 4 is the side view of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model;

[0035] Figure 5 is the schematic diagram of the support column of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model adopts double column symmetrical distribution structure;

[0036] Figure 6 is the schematic diagram of the curved surface photovoltaic support structure of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model adopts ellipsoid structure;

[0037] Figure 7 is the schematic diagram of the curved surface photovoltaic support structure of the self-powered heliostat using thin film photovoltaic of the embodiment of the utility model adopts hemispherical structure.

[0038] Wherein, 1 - torque beam;10 - traction column;2 - inhaul cable;3 - support column;4 - thin film photovoltaic panel;5 - first mirror;6 - support seat;7 - stand column;8 - second mirror;9 - fastener. DETAILED DESCRIPTION

[0039] In order to make the person skilled in the art better understand the technical scheme of the present application, the utility model will be further explained in detail in combination with the drawings and embodiments.

[0040] In the present application, the up, down, left, right, front and back orientation terms are established based on the position relationship shown in the drawings. If the drawings are different, the corresponding position relationship may also change, so it cannot be understood as a limitation on the scope of protection.

[0041] In the present application, the terms "mounting", "connecting", "connecting", "connecting", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, it can also be detachably connected, it can also be integrally connected, it can also be mechanically connected, it can also be electrically connected or can communicate with each other, it can also be directly connected, it can also be indirectly connected through an intermediate medium, it can be the interconnection of two components, or it can be the interaction relationship of two components. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] As described in the specification Figures 1-2The utility model discloses a kind of self-powered heliostat using thin film photovoltaic, including heliostat, charge-discharge device, battery pack, curved photovoltaic support structure and thin film photovoltaic panel 4.Heliostat includes reflector, drive motor, torque beam 1, support column 3 being set on torque beam.Curved photovoltaic support structure is set on support column 3, its outer surface sticks thin film photovoltaic panel 4, for maximizing the capture of solar energy.Thin film photovoltaic panel 4 is connected with charge-discharge device, for absorbing arbitrary angle sunlight to carry out direct power generation, and the electric energy generated is transported to charge-discharge device.Charge-discharge device connects battery pack and drive motor, for the drive motor of heliostat real-time power supply and the excess electric energy is stored in battery pack.

[0043] Example 1:

[0044] As described in the specification Figures 1-4 In the present embodiment, the heliostat is a cable-suspended heliostat, further comprising a cable 2, a first reflector 5, a support base 6, a stand 7, a second reflector 8 and a plurality of purlins. The torque beam 1 is provided with a first support and a second support, the support base 6 is rotatably connected with the first support and the push rod of the drive motor through a pin shaft, the housing of the drive motor is fixed with the second support, the bottom of the support base 6 is installed on the stand 7, and the stand 7 is used to provide overall support for the heliostat. The drive motor drives the torque beam 1 to rotate around the pin shaft connecting the support base 6 and the torque beam 1 through the extension and retraction action of the push rod, thereby adjusting the angle of the torque beam 1 and the reflector to track the position of the sun.

[0045] The pitch adjustment movement of the cable-suspended heliostat can also be achieved by installing one drive motor at each end of the torque beam 1 in other implementations, and the drive motor is connected with the upper computer, and the drive motor is controlled to rotate through the upper computer.

[0046] The plurality of purlins are distributed on the top of the torque beam 1 and serve as the mounting base of the reflector, and the top of each purlin is used to fix the edge of the reflector. The first reflector 5 and the second reflector 8 are distributed and installed on the top of the purlin, and the first reflector 5 surrounds the second reflector 8. The second reflector 8 is provided with a through hole for passing through the support column 3, one end of the support column 3 is installed on the top of the torque beam 1, and the other end passes through the through hole of the second reflector 8 upward. In the implementation of the present application, the top of the torque beam 1 is welded with a fastener 9, the fastener 9 is provided with a threaded hole, the support column 3 is provided with a corresponding threaded hole, and the support column 3 is connected together with the threaded hole of the fastener 9 by a bolt, so as to ensure the fixing strength of the support column 3.

[0047] In the preferred implementation of the present application, the central axes of the support column 3, the fastener 9 and the stand 7 are collinear.

[0048] The cables 2 are distributed on the top and bottom of the purlins to enhance the overall stability of the heliostat. The edges of the top and bottom of several purlins are provided with a plurality of cable fixing points, the support column 3 is provided with a cable connector, the bottom of the torque beam 1 is provided with two traction columns 10, and the two traction columns 10 are symmetrically arranged on both sides of the vertical column 7. Each traction column 10 is provided with a cable connector. The cables located on the top surface of the purlin are gathered from the edges of the purlin to the cable connector on the support column 3 and are firmly connected thereto. The cables located on the bottom surface of the purlin are gathered from the edges of the purlin to the cable connector on the traction column 10 and are firmly connected thereto. The distribution of the cables makes the overall heliostat achieve the best performance in wind resistance and structural stability.

[0049] The thin-film photovoltaic panel 4 has the characteristics of flexibility and light weight, and is suitable for installation on curved or irregular surfaces, increasing the flexibility of the layout. It includes a light-absorbing layer, a conductive layer, a conductive layer, and a protective layer. The light-absorbing layer can be made of copper indium gallium selenide (CIGS) material, which is used to absorb light energy and produce photoelectric effect. The conductive layer can be made of aluminum zinc oxide (AZO) material, which is used for the conduction and collection of electric charges. The substrate layer can be made of polyimide (PI) material, which is used to provide mechanical support for the photovoltaic panel while ensuring flexibility and light weight. The protective layer can be made of polyvinylidene fluoride (PVDF) material, which is used to protect the light-absorbing layer and the conductive layer from external environmental damage such as water vapor, dust, and ultraviolet light.

[0050] The curved photovoltaic support structure for adhering the thin-film photovoltaic panel 4 is spherical and is welded on the support column 3 in a spatially uniform manner. The curved photovoltaic support structure is located between the reflector and the cable connector on the support column 3. The photovoltaic solar panel is made into a sphere to increase the solar energy collection potential from every angle, and the projection area of sunlight at each angle is kept at a fixed value (i.e. πr 2 ), effectively solving the efficiency loss of traditional flat photovoltaic panels due to angle changes. The spherical design is suitable for all-weather sunlight tracking while maximizing energy collection efficiency.

[0051] To ensure that the photovoltaic system provides sufficient power, the area of the thin-film photovoltaic panel 4 needs to be determined by the following formula:

[0052]

[0053] In the formula, A represents the area of the thin-film photovoltaic panel (m 2 ); E represents the daily power consumption of the heliostat (kWh); I represents the average daily solar radiation (kWh / m 2 ); and η represents the photovoltaic panel photoelectric efficiency.

[0054] The curved photovoltaic support structure of the adhesion thin film photovoltaic panel 4 can absorb sunlight from any angle, realize omnidirectional light absorption and power generation, and work efficiently even in cloudy or dispersed light environment. According to project experience, a heliostat with a power of 10W works for 10 hours a day, and the required power is at least 0.1kWh a day. Taking the product of a domestic brand thin film manufacturer as an example, the photoelectric efficiency of the thin film photovoltaic panel is 15%, and according to the daily average solar radiation of 4.6kWh / m2 in the northwest region, it is calculated that a sphere with a radius of 0.215m needs to be made.

[0055] Embodiment 2

[0056] In this embodiment, based on the basis of embodiment 1, the optimized self-powered heliostat adopts several support columns 3, which has more arrangement forms compared with the single support column design of embodiment 1, and adapts to the needs of different use scenarios. The difference from embodiment 1 is that the self-powered heliostat in embodiment 1 has only one support column 3, which is directly arranged on the torque beam 1, and the central axis of the support column 3 is perpendicular to the central axis of the torque beam 1. This structure design is simple, suitable for the case where the weight of the heliostat is lighter, and can provide good overall stability.

[0057] In this embodiment, the arrangement mode of the support column 3 increases the double-column symmetric distribution, multi-column surrounding distribution, multi-layer distribution and the like.

[0058] As shown in the accompanying drawings Figure 5 The double-column symmetric distribution means that two support columns 3 are symmetrically arranged on both sides of the torque beam 1, while retaining the core features of the single-column arrangement in embodiment 1. Each support column 3 is arranged at a certain angle on both sides of the torque beam 1 for installing the curved photovoltaic support structure of the adhesion thin film photovoltaic panel 4, and does not bear the traction of the cable 2. This design improves the angle of solar energy capture and evenly distributes the weight of the heliostat, significantly enhances the wind resistance stability, and is suitable for larger area mirrors.

[0059] The multi-column surrounding distribution means that a plurality of support columns 3 are evenly arranged around the periphery of the heliostat, and each support column 3 is fixed to the side wall of the torque beam 1 by independent threaded fasteners and extends to the edge of the heliostat. Each support column 3 has at least one curved photovoltaic support structure of the adhesion thin film photovoltaic panel 4 installed thereon. This design is suitable for super large heliostat devices and can improve the carrying capacity and rigidity of the overall structure.

[0060] The multi-layer distribution refers to arranging support columns 3 above and below the mirror. The support columns 3 located above the mirror are fixed to the upper surface of the torque beam 1, and the central axis of the support columns 3 can be perpendicular to the torque beam 1 or distributed at an angle. The support columns 3 located below the mirror are fixed to the lower surface or side wall of the torque beam 1 and extend outward to the edge of the heliostat to ensure that the curved photovoltaic support structure of the adhesion thin-film photovoltaic panel 4 mounted on the support columns 3 is not blocked by the mirror. This design not only maximizes solar energy capture efficiency but also uniformly distributes the stress of the support columns on the torque beam 1, improving the stability and durability of the overall structure.

[0061] This embodiment further optimizes the overall performance of the heliostat, enhances structural stability, and adapts to different application scenarios, especially in large-area and high-strength heliostat devices.

[0062] Embodiment 3

[0063] The support column 3 is a hollow structure, and the charging and discharging device and the battery pack are arranged inside the support column 3 to avoid external environmental influences. The side wall of the support column 3 is provided with an opening, and the charging and discharging device and the battery pack are installed inside the support column 3 through the opening and locked in position by a fixed buckle, which can avoid damage from rain or sunlight and facilitate installation and maintenance. During assembly, the battery pack and the charging and discharging device are first installed inside the support column 3, and then the curved photovoltaic support structure of the adhesion thin-film photovoltaic panel 4 is installed on the support column 3, forming an integrated design of the curved photovoltaic support structure of the adhesion thin-film photovoltaic panel 4, the charging and discharging device, and the battery pack, thereby reducing installation and maintenance costs. The capacity of the battery pack is designed to be reserved according to the longest continuous rainy day, ensuring that the heliostat can operate stably for a long time.

[0064] Embodiment 4

[0065] This embodiment is a variant structure of the curved photovoltaic support structure of the adhesion thin-film photovoltaic panel 4 in Embodiment 1. The curved photovoltaic support structure can adopt a cylindrical, ellipsoidal, conical, hemispherical, or other polyhedral design.

[0066] The curved photovoltaic support structure is designed in a cylindrical shape and is fixed to the support column 3 in a spatially uniform manner. The cylindrical design can provide a larger light-receiving area, especially in the morning and evening when the solar elevation angle is low, significantly improving energy collection efficiency. Its structure is simple to manufacture and suitable for cost-sensitive application scenarios.

[0067] As shown in the accompanying drawings Figure 6 The curved photovoltaic support structure adopts an ellipsoidal design with its long axis perpendicular to the mirror plane, which can better adapt to the motion trajectory of the sun at different elevation angles and improve photovoltaic efficiency during a specific time period. At the same time, the ellipsoidal structure design balances the support strength and material utilization rate, making it suitable for application scenarios with high wind loads.

[0068] The curved photovoltaic support structure is designed as a cone with its vertex pointing towards the direction of solar reception, and thin-film photovoltaic panels are adhered to the conical surface. The conical design can reduce wind resistance and improve the overall system's wind resistance, while distributing solar panels at multiple angles to optimize photovoltaic power generation efficiency throughout the day.

[0069] As shown in the accompanying drawings Figure 7 The curved photovoltaic support structure is designed as a hemisphere with its opening direction pointing towards the main solar energy receiving direction. This design can concentrate light from a specific angle while reducing the weight of the structure, making it suitable for mobile heliostat systems that require lightweight.

[0070] The curved photovoltaic support structure adopts a polyhedral design, such as a tetrahedron, hexahedron, or dodecahedron, with thin-film photovoltaic panels adhered to each face. The polyhedral structure can provide a larger total light receiving area while maintaining high power generation efficiency at different time periods, making it suitable for regional photovoltaic power generation systems.

[0071] By adopting different curved photovoltaic support structure shapes, the optimal design can be flexibly selected according to project requirements, taking into account photovoltaic power generation efficiency, structural stability, wind resistance, and economic cost, providing diversified solutions for heliostat system applications.

[0072] Example 5

[0073] On the basis of Example 1, an anti-reflection coating and a hydrophobic coating are added to the surface of the thin-film photovoltaic panel 4. The anti-reflection coating and the hydrophobic coating can be achieved using physical vapor deposition (PVD), nano-dipping coating, or other coating techniques. The anti-reflection coating is used to reduce the reflection loss of light on the surface of the photovoltaic panel, increase the amount of transmitted light, and thus improve the photoelectric conversion efficiency of the photovoltaic panel. The anti-reflection coating can use a multi-layer composite coating (SiO2+TiO2) with higher anti-reflection performance in a wide wavelength range, while also having weather resistance and light transmission, making it suitable for long-term outdoor application of thin-film photovoltaic panels. The hydrophobic coating is used to reduce the adhesion of water droplets, dust, and pollutants on the surface of the photovoltaic panel, thereby reducing cleaning costs and maintaining the stability of power generation efficiency. The hydrophobic coating can use a composite coating (fluorinated polymer + nano structure) with high hydrophobicity, weather resistance, and wear resistance, making it particularly suitable for curved photovoltaic support structures. The surface of the thin-film photovoltaic panel 4 can effectively prevent dust, rainwater, and pollutants from adhering by adding the anti-reflection coating and the hydrophobic coating, reducing the cleaning frequency and maintenance requirements. The anti-reflection coating improves the photoelectric conversion efficiency of the photovoltaic panel, and the hydrophobic coating further extends the service life of the photovoltaic panel.

[0074] The utility model realizes the maximization solar energy's capture, adopts the design that thin film type photovoltaic board 4 is combined with curved surface photovoltaic support structure, compact structure, easy installation, support column 3 inside integrated battery group and charge-discharge device, need not complex wiring and distribution facilities of external connection, thereby greatly reduced construction and installation cost. Traditional heliostat usually need to lay a large number of cable and external power supply facilities, and the utility model passes through the integration design of hollow support column and curved surface photovoltaic support structure, need not lay cable, not only reduce manual and material expense, still can realize quick installation and replace photovoltaic board or damaged component, reduced downtime and maintenance complexity.

[0075] The above-mentioned is only the embodiment of the present application, and the well-known specific structure and characteristics of the scheme are not described in detail. It is obvious for those skilled in the art that the present application is not limited to the details of the above-mentioned exemplary embodiments, and the present application can be realized in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, and the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. A self-powered heliostat using thin-film photovoltaics, characterized in that, The system includes a heliostat, a charging and discharging device, a battery pack, a curved photovoltaic support structure, and a thin-film photovoltaic panel (4); the heliostat includes a reflector, a drive motor, a torque beam (1), and a support column (3) mounted on the torque beam (1); the curved photovoltaic support structure is fixed to the outside of the support column (3), and the thin-film photovoltaic panel (4) is mounted on its outer surface; The thin-film photovoltaic panel (4) is electrically connected to the charging and discharging device to receive sunlight and convert it into electrical energy to supply power to the charging and discharging device. The charging and discharging device is connected to the drive motor and the battery pack respectively to supply power to the drive motor and / or charge the battery pack.

2. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, Thin-film photovoltaic panel area = daily electricity consumption of heliostats / (average daily solar radiation × photovoltaic panel photoelectric efficiency).

3. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The support column (3) is a hollow structure, and a charging and discharging device and a battery pack are installed inside. The side wall of the support column (3) has an opening, and the charging and discharging device and the battery pack are installed inside the support column (3) through the opening.

4. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The torque beam (1) is provided with a fastener (9) having an external threaded hole, and the support column (3) is provided with a threaded hole that mates with the fastener (9). The support column (3) and the fastener (9) are connected by bolts.

5. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The reflector includes a first reflector (5) and a second reflector (8) distributed and installed on the top of the purlin. The first reflector (5) is arranged around the second reflector (8). The center of the second reflector (8) is provided with a through hole. One end of the support column (3) is installed on the top of the torque beam (1), and the other end passes through the through hole of the second reflector (8).

6. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The curved photovoltaic support structure that adheres to the thin-film photovoltaic panel (4) is one of the following: spherical, cylindrical, ellipsoidal, conical, hemispherical or polyhedral, and is welded to the support column (3) in a spatially uniform manner.

7. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The heliostat also includes cables (2), which are distributed at the top and bottom of the purlins. Multiple cable fixing points are provided at the edges of the top and bottom of the purlins. The support column (3) is provided with cable connectors. The bottom of the torque beam (1) is provided with a traction column (10), and cable connectors are provided on the traction column (10).

8. The self-powered heliostat using thin-film photovoltaics according to claim 7, characterized in that, The cables located on the top surface of the purlin converge and connect from the edge of the purlin to the cable connector of the support column (3), and the cables located on the bottom surface of the purlin converge and connect from the edge of the purlin to the cable connector on the traction column (10).

9. The self-powered heliostat using thin-film photovoltaics according to claim 4, characterized in that, The central axes of the support column (3), the curved photovoltaic support structure, and the fastener (9) are collinear.

10. The self-powered heliostat using thin-film photovoltaics according to claim 1, characterized in that, The surface of the thin-film photovoltaic panel (4) is coated with an anti-reflective coating and a hydrophobic coating.

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