Floating type photovoltaic generating capacity testing device and method

Abstract

The invention discloses a floating photovoltaic generating capacity test device and method. The floating photovoltaic generating capacity test device comprises a generating capacity test platform and an irradiation lamp source, the generating capacity test platform is provided with a motion piston array, and the motion piston array is used for simulating wave motion so as to test the performance of the photovoltaic module under the wave condition. A photovoltaic supporting platform is arranged above the moving piston array, and a photovoltaic assembly is installed on the photovoltaic supporting platform. A temperature cooling device is arranged on the photovoltaic supporting platform, and the irradiation lamp source is arranged above the photovoltaic module; the real water surface environment and the actual working temperature of the floating type photovoltaic system can be simulated, so that the generating capacity of the floating type photovoltaic system can be accurately measured.

Description

Technical Field

[0001] The invention belongs to the technical field of photovoltaic power generation, and relates to a floating photovoltaic power generation test device and method. Background Art

[0002] As the global demand for renewable energy continues to grow, photovoltaic technology, as an important component of clean energy, is also constantly innovating and developing its application forms. Among them, floating photovoltaic, as an emerging photovoltaic power generation method, has received extensive attention and research in recent years because of its advantages such as efficient use of water area, reduced land occupation, and reduced impact of ground photovoltaic power stations on the ecological environment.

[0003] The basic principle of floating photovoltaic technology is to install photovoltaic panels on a platform structure floating on the water surface, and convert solar energy into electrical energy through the photovoltaic effect. However, compared with traditional land-based photovoltaic systems, floating photovoltaics face more complex challenges from external environmental factors during actual operation. First, due to the action of waves on the water surface, the floating photovoltaic platform will undergo continuous dynamic movement, causing the inclination angle of the photovoltaic modules to change continuously. This change in inclination angle will directly affect the solar irradiance received by the photovoltaic panels, and thus have a significant impact on the power generation. Secondly, the water surface environment has a unique water cooling effect, which makes the operating temperature of the floating photovoltaic system lower than that of land-based photovoltaics, which will also have an important impact on the power generation efficiency of photovoltaic cells.

[0004] Accurately evaluating the performance of floating photovoltaic power generation in a laboratory environment is a key step in promoting the commercial application of this technology. However, there are currently many difficulties in testing the power generation of floating photovoltaics in the laboratory. On the one hand, how to simulate the wave movement in a real water environment and its impact on the inclination of photovoltaic modules is a major challenge in laboratory testing. On the other hand, due to the difference between water surface temperature and land temperature, how to accurately simulate the actual operating temperature of the floating photovoltaic system in the laboratory is also an important link to ensure the accuracy of test data. Summary of the invention

[0005] The purpose of the present invention is to solve the technical problem that when measuring photovoltaic power generation performance in the laboratory in the prior art, the real working environment of the photovoltaic system cannot be accurately simulated, resulting in low measurement accuracy, and to provide a floating photovoltaic power generation test device and method.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A first aspect of the present invention provides a floating photovoltaic power generation test device, comprising a power generation test platform and an irradiation lamp source; The power generation test platform is provided with a moving piston array, and the moving piston array is used to simulate wave motion; a photovoltaic support platform is provided above the moving piston array; a photovoltaic module is installed above the photovoltaic support platform; a temperature cooling device is provided on the photovoltaic support platform; and the irradiation lamp source is provided above the photovoltaic module.

[0007] Furthermore, the moving piston array is connected to a central controller, and the central controller controls the movement of the moving piston array to simulate wave motion.

[0008] Furthermore, the photovoltaic support platform is a flexible support platform.

[0009] Furthermore, the size of the photovoltaic module is reduced in proportion to the size of the actual photovoltaic panel.

[0010] Furthermore, the temperature cooling device is arranged in close contact with the bottom of the photovoltaic support platform.

[0011] Further, the temperature cooling device includes a temperature switch, a soft film and a flow guide hose; A portion of the diversion hose is arranged in a serpentine shape on the soft film, and forms a circulation loop with another portion passing through the temperature exchanger.

[0012] Furthermore, the diversion hose is evenly distributed on the soft film.

[0013] Furthermore, the irradiance of the irradiation lamp source is evenly distributed, and the irradiance can be adjusted as needed.

[0014] Furthermore, the photovoltaic assembly is fixed on the photovoltaic support platform through a bracket.

[0015] A second aspect of the present invention provides a floating photovoltaic power generation test method, comprising the following steps: Collect temperature information, wave motion information, and size and material information of offshore floating flexible platforms; Customize photovoltaic support platform based on size and material information; Based on the temperature information, a temperature cooling device is used to control the temperature of the photovoltaic support platform; Based on the wave motion information, the motion piston array is controlled to simulate the wave motion of the offshore floating flexible platform; The power generation test platform measures the power generation of photovoltaic modules.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention discloses a floating photovoltaic power generation test device, which can highly simulate the undulating motion of waves in the ocean through the design and control of a moving piston array, and provide a test environment close to the real sea conditions for photovoltaic modules. This simulation not only helps to evaluate the structural stability of photovoltaic modules under dynamic loads, but also accurately reflects the impact of waves on the power generation efficiency of photovoltaic panels. By setting the irradiation light source directly above the photovoltaic module, parameters such as light intensity and spectral distribution can be accurately controlled to simulate the lighting environment under different weather conditions, thereby achieving a comprehensive evaluation of the power generation performance of photovoltaic modules. This controllable test environment greatly shortens the test cycle and improves the accuracy and reliability of the test results. The temperature cooling device integrated on the photovoltaic support platform simulates the water cooling effect of the water surface on the floating photovoltaic, further accurately simulates the marine environment and working temperature for measuring photovoltaics, and improves the test accuracy of floating photovoltaic power generation.

[0017] Furthermore, the moving piston array is connected to a central controller, which can receive preset wave parameters (such as wavelength, wave height, period, etc.) and accurately control the movement of the moving piston array accordingly, thereby achieving high-precision simulation of ocean wave motion. This precise control not only helps to evaluate the performance of photovoltaic modules under specific wave conditions, but also provides key data support for the design and optimization of photovoltaic power plants. Through the programming and setting of the central controller, the parameters of the wave simulation can be easily adjusted, such as changing the frequency, amplitude or duration of the waves to meet different test requirements. This flexibility enables the test device to cover a wider range of test scenarios.

[0018] Furthermore, the photovoltaic support platform is a flexible support platform, which can more realistically simulate the dynamic response of an offshore floating photovoltaic platform under the action of waves. Its flexibility and deformation characteristics are similar to those of an actual offshore platform, making the test results closer to the actual situation and helping to accurately evaluate the performance of photovoltaic modules in a complex marine environment.

[0019] Furthermore, the use of photovoltaic modules that are proportionally reduced in size to the actual photovoltaic panel size makes it easier and more accurate to measure performance parameters (such as power generation, conversion efficiency, etc.). The reduced size of the photovoltaic modules makes the test device more compact, which is convenient for efficient testing in limited laboratory space. In addition, the assembly and disassembly process of small-sized modules is simpler, which speeds up the test process and improves the overall test efficiency.

[0020] Furthermore, by fixing the bracket, the photovoltaic modules can be firmly installed on the photovoltaic support platform, effectively preventing shaking and displacement caused by environmental factors such as waves and wind, and improving the structural stability of the entire photovoltaic system. This helps to ensure the safety and reliability of photovoltaic modules during long-term operation; the bracket design is flexible and can adapt to photovoltaic support platforms of different shapes and sizes, as well as different installation environments and conditions. This adaptability enables the test device to be widely used in the testing and research of various floating photovoltaic power stations, improving the accuracy and practicality of the test.

[0021] The present invention discloses a floating photovoltaic power generation test method. By collecting temperature information and wave motion information of an offshore floating flexible platform, the method can truly reflect the working conditions in an actual marine environment. Based on this information, a temperature cooling device is used to accurately control the temperature of the photovoltaic support platform. At the same time, a motion piston array is used to accurately simulate wave motion, thereby ensuring a high degree of consistency between the test environment and the actual application scenario, and improving the accuracy and reliability of the test results. According to the collected size material information, a customized photovoltaic support platform is designed, which not only ensures the stability and safety of photovoltaic module installation, but also effectively improves the overall efficiency of the photovoltaic system. The customized design also takes into account the durability and environmental adaptability of the material, extending the service life of the floating photovoltaic system. In an accurately simulated offshore environment, the power generation test platform can directly measure the power generation of the photovoltaic module, and this step directly reflects the power generation efficiency and performance of the photovoltaic system under specific conditions. The data obtained by this test method can not only be used to evaluate the performance of the existing floating photovoltaic system, but also provide valuable data support for the optimization design of the system, and can adjust the design parameters in a targeted manner to further improve the system efficiency and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 This is a structural diagram of a floating photovoltaic power generation test device of the present invention; Figure 2 A side view of a floating photovoltaic power generation test device of the present invention; Figure 3 This is the structural diagram of the temperature cooling device.

[0024] Among them: 1-test platform; 2-moving piston array; 3-photovoltaic support platform; 4-photovoltaic module; 5-irradiation light source; 6-temperature switch; 7-soft film; 8-diversion hose. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and marked in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0028] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0029] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The present invention is further described in detail below in conjunction with the accompanying drawings: See also Figure 1-3 , the present invention discloses a floating photovoltaic power generation test device, comprising a power generation test platform 1 and an irradiation lamp source 5; The power generation test platform 1 is provided with a moving piston array 2; the moving piston array 2 is connected to a central controller, and the central controller simulates the wave motion at sea by setting wave parameters, including period, wave height, etc. A photovoltaic support platform 3 is provided above the moving piston array 2; the central controller controls the moving piston array 2 to move up and down according to the preset wave parameters, driving the flexible photovoltaic support platform 3 to simulate the movement of the floating photovoltaic platform at sea. A photovoltaic module 4 is installed above the photovoltaic support platform 3; the size of the photovoltaic module 4 is proportional to the size of the actual photovoltaic panel, and the photovoltaic support platform 3 is a flexible support platform, and its size and rigidity are similar to those of the floating flexible platform at sea. The photovoltaic module 4 is fixed on the photovoltaic support platform 3 by a bracket. According to needs, the inclination angle of the photovoltaic module 4 is changed by replacing the brackets at different angles to evaluate the influence of different inclination angles on power generation.

[0032] The photovoltaic support platform 3 is provided with a temperature cooling device; the temperature cooling device is attached to the bottom of the photovoltaic support platform 3; the temperature cooling device includes a temperature switch 6, a soft film 7 and a guide hose 8; a part of the guide hose 8 is arranged in a serpentine shape on the soft film 7, and forms a circulation loop with another part passing through the temperature switch 6. The guide hose 8 can be evenly distributed on the soft film 7; the temperature switch 6 is turned on to circulate the cooling liquid in the guide hose 8, which can simulate the water cooling effect of the water surface on the floating photovoltaic.

[0033] The irradiation lamp source 5 is arranged above the photovoltaic module 4; the irradiance of the irradiation lamp source 5 is evenly distributed; the irradiance of the irradiation lamp source 5 is adjusted as needed. The irradiance of the irradiation lamp source is adjusted as needed to simulate the floating photovoltaic power generation under different sunshine intensities.

[0034] The power generation data of the photovoltaic module 4 under different conditions is recorded through the power generation test platform 1 to complete the floating photovoltaic power generation test.

[0035] The motion piston array 2 of the present invention is used to simulate wave motion. Since it is an array structure, it can simulate the wave motion of regular waves and irregular waves. According to the Froude similarity criterion, the present invention obtains the results of the interaction between waves and floating structures at the experimental scale through numerical simulation, including information such as wave parameters, period and wave height. The motion information of the floating photovoltaic power generation platform includes the vertical motion amplitude and period at each point, and the motion mode of the piston at each point is extracted. These motion information are transmitted to the motion piston array 2 via the central controller so that each piston moves in a predetermined manner, thereby simulating the motion of the floating platform under the action of waves. For the photovoltaic support platform 3, according to the size and stiffness information of the offshore floating flexible platform, the size and stiffness and other property information of the photovoltaic support platform 3 at the experimental scale are obtained according to the similarity criterion, and the photovoltaic support platform 3 is manufactured according to this information. The manufactured flexible photovoltaic support platform 3 is placed on the motion piston array 2, and the motion generated by the motion piston array 2 can drive the motion of the photovoltaic support platform 3. The photovoltaic support platform 3 is equipped with a scaled-down photovoltaic module 4. The size of the photovoltaic module 4 at the experimental scale is proportional to the size of the photovoltaic panel on the market, so it needs to be customized, and the appropriate scale ratio is determined to reduce the scale effect caused by the similarity criterion on the photovoltaic module 4. The photovoltaic module 4 at the experimental scale is fixed on the photovoltaic support platform 3 at a certain inclination angle through a bracket, and the inclination angle of the photovoltaic module 4 can be changed by customizing brackets with different angles. A layer of temperature cooling device is attached to the back of the photovoltaic support platform 3, and the temperature cooling device includes a soft film 7, a guide hose 8 and a temperature switch 6. The guide hose 8 is evenly arranged on the soft film 7 to evenly take away the heat. The cooling liquid in the guide hose 8 is continuously circulated through the temperature switch 6. The temperature of the liquid will rise after flowing through the photovoltaic support platform 3, and the temperature will cool after passing through the temperature switch 8, and the next temperature cycle will continue. The irradiance generated by the irradiation lamp 5 can be evenly distributed on the photovoltaic support platform 3, and the irradiance can be adjusted to simulate the floating photovoltaic power generation under different sunshine intensities.

[0036] The Froude similarity criterion of the present invention means that in order to maintain the similarity between the offshore floating flexible platform and the floating photovoltaic power generation test device of the present invention under the action of gravity, the ratio of the inertial force of the fluid to the gravity must be equal, that is, the Froude number is equal. The Froude number is a dimensionless number that characterizes the ratio of the inertial force to the gravity acting on corresponding points in similar flows. The calculation formula of the Froude number is: r =v² / (g×L), where v is the flow velocity, g is the acceleration due to gravity, and L is the characteristic length. In the flow of the offshore floating flexible platform and the floating photovoltaic power generation test device, if their Froude numbers are equal, the two flows are considered to be similar under the action of gravity.

[0037] The working process of the floating photovoltaic power generation test device according to the embodiment of the present invention is as follows: The wave parameters, including period, wave height, etc., are set through the central controller to simulate the movement of waves at sea.

[0038] The central controller controls the moving piston array 2 to move up and down according to the preset wave parameters, driving the flexible photovoltaic support platform 3 to simulate the movement of the offshore floating photovoltaic platform.

[0039] As required, the inclination angle of the photovoltaic module 4 is changed by replacing brackets with different angles to evaluate the influence of different inclination angles on the power generation.

[0040] The temperature switch 6 is turned on to circulate the cooling liquid in the guide hose 8 to simulate the cooling effect of the water surface on the floating photovoltaic.

[0041] The irradiance of the irradiation lamp source 5 is adjusted as needed to simulate the floating photovoltaic power generation under different sunshine intensities.

[0042] The power generation data of the photovoltaic module 4 under different conditions is recorded through the power generation test platform 1, and analyzed and evaluated.

[0043] The floating photovoltaic power generation test device of the present invention can accurately simulate wave motion through the synergy of the motion piston array 2 and the central controller, and provide a test scene similar to the actual marine environment for the photovoltaic module. This helps to evaluate the stability, durability and power generation efficiency of the photovoltaic module under the action of waves. The photovoltaic support platform 3 adopts a flexible design, and its size and rigidity are similar to those of the offshore floating flexible platform, so that the photovoltaic module can better adapt to the ups and downs and changes of waves. This design helps to improve the accuracy and practicality of the test and provide strong support for the design and optimization of photovoltaic power stations; the size of the photovoltaic module 4 is proportional to the actual photovoltaic panel, which not only maintains the basic performance characteristics of the photovoltaic module, but also significantly reduces the material and manufacturing costs. At the same time, the small-sized photovoltaic module makes the test process more convenient and efficient, and reduces the test cost and time. The irradiance of the irradiation lamp source 5 is evenly distributed and can be adjusted as needed, ensuring that the photovoltaic module receives uniform and stable lighting conditions during the test, improving the accuracy and reliability of the test, and the photovoltaic module 4 is fixed on the photovoltaic support platform 3 by a bracket, which enhances the structural stability and installation convenience of the photovoltaic module. This design helps ensure the safety and reliability of PV panels during testing and reduces testing errors caused by shaking or displacement. An embodiment of the present invention provides a floating photovoltaic power generation test method, comprising the following steps: S1, collects temperature information, wave motion information, and size and material information of offshore floating flexible platforms: High-precision temperature sensors are used to continuously monitor the actual working temperature of the offshore floating flexible platform, record and analyze the changing patterns of temperature data; wave monitoring equipment is used to capture key parameters such as the height, period, and direction of offshore waves in real time, providing data support for subsequent wave motion simulations. Through on-site measurements and reference to relevant technical documents, detailed information such as the size, structural materials, and weight of the floating flexible platform is obtained, providing a basis for the customized design of the photovoltaic support platform.

[0044] S2, customize the photovoltaic support platform 3 based on the size and material information; According to the collected size and material information, the photovoltaic support platform 3 is customized and produced using appropriate materials and processes. It is ensured that the photovoltaic support platform under the test is similar to the actual offshore floating photovoltaic platform.

[0045] S3, based on the temperature information, using a temperature cooling device to control the temperature of the photovoltaic support platform 3; Based on the temperature information, the temperature of the photovoltaic support platform 3 is adjusted by a temperature cooling device to simulate the actual working temperature of the offshore floating flexible platform.

[0046] S4, based on the wave motion information, controlling the motion piston array 2 to simulate the wave motion of the offshore floating flexible platform; According to the collected wave motion information, the moving piston array 2 is controlled to simulate the wave motion of the offshore floating flexible platform. By adjusting the parameters such as the movement amplitude, frequency and direction of the piston, the wave motion can be accurately simulated to provide a real force environment for the photovoltaic module.

[0047] S5, the power generation test platform 1 measures the power generation of the photovoltaic module 4.

[0048] After completing the above steps, the photovoltaic module 4 is installed on the photovoltaic support platform 3 and connected to the power generation test platform 1. The test platform is started to continuously measure and record the power generation of the photovoltaic module. At the same time, pay attention to the working status of the photovoltaic module and eliminate possible faults or abnormal conditions in time.

[0049] This embodiment accurately measures the power generation of photovoltaic modules by accurately simulating the actual working environment of the offshore floating flexible platform. The data measured by the power generation test platform 1 are collated and analyzed, and the key indicators such as the average power generation and power generation efficiency of photovoltaic modules under different temperature and wave conditions are calculated and analyzed. In practical applications, based on the test results, optimization design solutions or improvement suggestions can be proposed to improve the overall performance and economic benefits of the floating photovoltaic system.

[0050] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A floating photovoltaic power generation test device, characterized in that: It comprises a power generation test platform (1) and an irradiation lamp source (5); The power generation test platform (1) is provided with a moving piston array (2), and the moving piston array (2) is used to simulate wave motion; a photovoltaic support platform (3) is provided above the moving piston array (2); a photovoltaic module (4) is installed above the photovoltaic support platform (3); a temperature cooling device is provided on the photovoltaic support platform (3); and the irradiation lamp source (5) is provided above the photovoltaic module (4).

2. The floating photovoltaic power generation test device according to claim 1, characterized in that: The moving piston array (2) is connected to a central controller, and the central controller controls the movement of the moving piston array (2) to simulate wave movement.

3. The floating photovoltaic power generation test device according to claim 1, characterized in that: The photovoltaic support platform (3) is a flexible support platform.

4. The floating photovoltaic power generation test device according to claim 1, characterized in that: The size of the photovoltaic assembly (4) is reduced in proportion to the size of the actual photovoltaic panel.

5. The floating photovoltaic power generation test device according to claim 1, characterized in that: The temperature cooling device is arranged in close contact with the bottom of the photovoltaic support platform (3).

6. The floating photovoltaic power generation test device according to claim 1, characterized in that: The temperature cooling device comprises a temperature exchanger (6), a soft film (7) and a flow guiding hose (8); A portion of the guide hose (8) is arranged in a serpentine shape on the soft film (7), and forms a circulation loop with another portion passing through the temperature exchanger (6).

7. The floating photovoltaic power generation test device according to claim 6, characterized in that: The flow guiding hose (8) is evenly distributed on the soft film (7).

8. The floating photovoltaic power generation test device according to claim 1, characterized in that: The irradiance of the irradiation lamp source (5) is evenly distributed, and the irradiance can be adjusted as required.

9. The floating photovoltaic power generation test device according to claim 1, characterized in that: The photovoltaic assembly (4) is fixed on the photovoltaic support platform (3) via a bracket.

10. A floating photovoltaic power generation test method, based on the floating photovoltaic power generation test device according to any one of claims 1 to 9, characterized in that: The following steps are involved: Collect temperature information, wave motion information, and size and material information of offshore floating flexible platforms; Customize the photovoltaic support platform based on the size and material information (3); Based on the temperature information, a temperature cooling device is used to control the temperature of the photovoltaic support platform (3); Based on the wave motion information, the motion piston array (2) is controlled to simulate the wave motion of the offshore floating flexible platform; The power generation test platform (1) measures the power generation of the photovoltaic module (4).

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