Offshore photovoltaic module comprehensive performance test system

Abstract

The invention relates to an offshore photovoltaic module comprehensive performance test system, and aims to solve the problem that a traditional photovoltaic test system cannot accurately simulate an offshore complex environment, and the system comprises a test cavity which is provided with an air inlet; a photovoltaic support and a photovoltaic module arranged on the photovoltaic support; a sunlight simulation lamp; the photovoltaic module tester is electrically connected with the photovoltaic module; the refrigerating / heating module is used for inputting hot / cold air into the air inlet; the salt mist / acid mist / alkali mist nozzle module is arranged at the top of the test cavity; the salt liquid / acid liquid / alkali liquid configuration module is connected with the salt mist / acid mist / alkali mist nozzle module through a liquid conveying pipeline and exchanges heat with an air outlet of the refrigerating / heating module; a fan can be arranged at the air inlet, and a sun shield capable of adjusting the sun-shading coverage area is arranged on the photovoltaic support. Compared with the prior art, the device and the method have the advantages that complex environmental factors such as illumination, temperature, corrosion and shadow shielding on the sea can be comprehensively and accurately simulated, and an effective means is provided for performance test and evaluation of the photovoltaic module on the sea.

Description

Technical Field

[0001] The invention relates to a photovoltaic performance testing system, and in particular to an offshore photovoltaic module comprehensive performance testing system. Background Art

[0002] As the global demand for clean energy continues to grow, offshore photovoltaic power generation, as a renewable energy utilization method with great potential, has received extensive attention and research. However, the offshore environment is highly complex and particular, which brings many challenges to the performance and reliability of offshore photovoltaic modules, and also makes the accurate testing and evaluation of its comprehensive performance a key issue that needs to be solved urgently.

[0003] The lighting conditions in the offshore environment are affected by many factors such as weather, time, latitude and season, and are significantly different from those on land. For example, factors such as clouds, fog and seawater reflection at sea can lead to uneven distribution of light intensity and changes in spectral composition. In addition, the temperature at sea varies widely, with a significant temperature difference between day and night, and is accompanied by a high humidity air environment. At the same time, the salt, acidic and alkaline substances in the ocean will form corrosive salt mist, acid mist and alkaline mist, which will corrode photovoltaic modules for a long time, seriously affecting their structural integrity and power generation performance. Furthermore, obstructions from objects at sea (such as ships, seabirds, etc.) may cast shadows on photovoltaic modules, triggering a hot spot effect, further reducing power generation efficiency and even damaging modules.

[0004] Traditional photovoltaic test systems are mainly designed for land environments and cannot fully and accurately simulate these complex environmental factors at sea. In terms of light simulation, existing solar simulators often find it difficult to accurately reproduce the special light characteristics at sea, resulting in inaccurate evaluation of the power generation performance of photovoltaic modules under offshore light conditions. For temperature control, most test systems can only achieve simple temperature adjustment, and cannot simultaneously take into account the matching of the intake temperature and the temperature of the fog body, making it difficult to simulate the variable temperature at sea and the synergistic environment of temperature and fog. In terms of corrosion environment simulation, previous test devices usually cannot effectively control the temperature of salt spray, acid spray and alkaline spray, resulting in a large deviation between the test results and the actual offshore corrosion conditions, and unable to provide accurate data support for the anti-corrosion design of photovoltaic modules. As for the simulation of shadow occlusion, the existing test methods are also relatively simple, lacking effective simulation methods for complex offshore occlusion conditions, making it difficult to conduct in-depth research on the comprehensive impact of shadows on the performance of offshore photovoltaic modules.

[0005] Therefore, in order to better study the performance of offshore photovoltaic modules in complex environments, it is of great practical significance and urgent market demand to develop a comprehensive performance testing system that can comprehensively and accurately simulate offshore environmental factors. This is the key technical problem that the present invention is committed to solving. Summary of the invention

[0006] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide an offshore photovoltaic module comprehensive performance testing system so that the sprayed salt mist / acid mist / alkaline mist can be close to the target experimental temperature and accurately match the air flow temperature input at the air inlet.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] The first aspect of the present invention provides an offshore photovoltaic module comprehensive performance test system, comprising a test chamber, a photovoltaic bracket, a photovoltaic module, a sunlight simulation lamp, a photovoltaic module tester, a cooling / heating module, and a salt mist / acid mist / alkali mist nozzle module, wherein specifically:

[0009] The test chamber is provided with an air inlet;

[0010] The photovoltaic support is arranged in the test cavity;

[0011] A photovoltaic module is arranged on the photovoltaic support;

[0012] A sunlight simulation lamp is arranged in the test chamber;

[0013] A photovoltaic module tester, electrically connected to the photovoltaic module;

[0014] A cooling / heating module is used to input hot air or cold air into the air inlet;

[0015] A salt mist / acid mist / alkaline mist nozzle module is arranged at the top of the test chamber;

[0016] The saline / acid / alkali solution configuration module is connected to the salt mist / acid mist / alkali mist nozzle module via an infusion pipeline, and the infusion pipeline exchanges heat with the air outlet of the cooling / heating module via a heat exchanger.

[0017] Furthermore, a fan is provided at the air inlet.

[0018] Furthermore, at least one sunshade is provided on the photovoltaic support.

[0019] Furthermore, the photovoltaic bracket is provided with a plurality of insertion holes, and the sun visor is inserted into the insertion holes through the connecting rods at the bottom, and the sunshade coverage area can be adjusted by rotating the sun visor.

[0020] Furthermore, the salt mist / acid mist / alkaline mist nozzle module includes a plurality of nozzles arranged in an array.

[0021] Furthermore, the photovoltaic module includes a plurality of photovoltaic panels arranged in an array on the photovoltaic bracket, and the plurality of photovoltaic panels are electrically connected to the photovoltaic module tester after being connected in parallel.

[0022] Further, the photovoltaic module tester includes one of TH-PV30, TH-PV31, 6591A portable photovoltaic string tester, and 6595A outdoor multi-channel photovoltaic module tester;

[0023] The solar simulation lamp is a HMI4000W / DXS metal halide solar simulator.

[0024] Furthermore, the salt solution / acid solution / alkali solution configuration module includes a mixing tank, a feeding pipe arranged on the mixing tank, and a metering pump connected to the input port of the mixing tank.

[0025] Furthermore, the metering pump is connected to an external water source and is used to input a fixed amount of water into the mixing tank.

[0026] Furthermore, the output section of the mixing tank is connected to the input port of the heat exchanger through an infusion pipe, the output end of the heat exchanger is connected to a booster pump through an infusion pipe, and the booster pump is connected to the salt mist / acid mist / alkali mist nozzle module through an infusion pipe.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] The offshore photovoltaic module comprehensive performance test system provided by the present invention has significant and unique beneficial effects. Its key innovation lies in the ingenious thermal connection between the salt mist / acid mist / alkaline mist nozzle module and the refrigeration / heating module through a heat exchanger. Through this innovative heat exchange design, the sprayed salt mist / acid mist / alkaline mist can be close to the target experimental temperature and accurately match the air flow temperature input at the air inlet. The advantages of this design are reflected in many aspects. First of all, when simulating the actual offshore environment, temperature is a key factor. The salt mist, acid mist, and alkaline mist at sea are often accompanied by specific temperature conditions. This design of the present invention can highly restore this complex real environment and ensure the authenticity and accuracy of the test conditions. Previous test systems often cannot accurately control the temperature of the mist body, resulting in deviations between the test results and the actual offshore environment, and the present invention effectively solves this problem. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the comprehensive performance testing system of offshore photovoltaic modules in the present invention.

[0030] In the figure: 1. test chamber, 2. photovoltaic bracket, 3. photovoltaic module, 4. air inlet, 5. cooling / heating module, 6. photovoltaic module tester, 7. salt spray / acid spray / alkali spray nozzle module, 8. heat exchanger, 9. sunshade, 10. sunlight simulation lamp, 12. mixing tank, 13. feeding pipe, 14. metering pump, 15. booster pump. DETAILED DESCRIPTION

[0031] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Component models, material names, connection structures, control methods, algorithms and other features not clearly described in this technical solution are all considered to be common technical features disclosed in the prior art.

[0032] Example 1

[0033] This embodiment provides an offshore photovoltaic module comprehensive performance test system, including a test chamber 1, a photovoltaic bracket 2, a photovoltaic module 3, a sunlight simulation lamp 10, a photovoltaic module tester 6, a cooling / heating module 5, and a salt mist / acid mist / alkali mist nozzle module 7, wherein the specific Figure 1 .

[0034] The test chamber 1 is provided with an air inlet 4, and a fan is provided at the air inlet 4; a photovoltaic bracket 2 is provided in the test chamber 1; a photovoltaic module 3 is provided on the photovoltaic bracket 2; a sunlight simulation lamp 10 is provided in the test chamber 1; a photovoltaic module tester 6 is electrically connected to the photovoltaic module 3; a cooling / heating module 5 is used to input hot air or cold air to the air inlet 4; a salt mist / acid mist / alkali mist nozzle module 7 is provided at the top of the test chamber 1; a salt / acid / alkali solution configuration module is connected to the salt mist / acid mist / alkali mist nozzle module 7 through an infusion pipeline, and the infusion pipeline exchanges heat with the air outlet of the cooling / heating module 5 through a heat exchanger 8. An air outlet or air outlet hole can also be provided on the test chamber 1 for the discharge of gas.

[0035] At least one sunshade 9 is provided on the photovoltaic bracket 2. The photovoltaic bracket 2 is provided with a plurality of sockets, and the sunshade 9 is inserted into the sockets through the connecting rods at the bottom, and the sunshade coverage area can be adjusted by rotating the sunshade 9. The role of the sunshade 9 in the test process is to simulate the obstruction of objects at sea. Since the photovoltaic bracket 2 is provided with a plurality of sockets, a preset number of sunshades 9 are inserted into the sockets through the connecting rods at the bottom, and the sunshade coverage area can be adjusted by rotating the sunshade 9, and then the comprehensive impact of shadows on the performance of offshore photovoltaic modules can be deeply studied, and the performance of offshore photovoltaic modules such as power generation efficiency and stability under the shadow obstruction conditions that may actually be encountered can be better evaluated, so that the test environment is more in line with the complex and changeable actual scenes at sea.

[0036] The salt mist / acid mist / alkaline mist nozzle module 7 includes a plurality of nozzles arranged in an array.

[0037] The photovoltaic module 3 includes a plurality of photovoltaic panels arranged in an array on the photovoltaic support 2 . The plurality of photovoltaic panels are connected in parallel and are electrically connected to the photovoltaic module tester 6 .

[0038] The photovoltaic module tester 6 includes one of TH-PV30, TH-PV31, 6591A portable photovoltaic string tester, and 6595A outdoor multi-channel photovoltaic module tester. The sunlight simulation lamp 10 is a HMI4000W / DXS metal halide lamp sunlight simulator.

[0039] The reason why the test scenario of the present invention requires a cooling / heating module is that the temperature in the offshore environment varies greatly, the temperature difference between day and night is obvious, and there is a high-humidity air environment. Traditional photovoltaic test systems are difficult to simulate the changeable temperature at sea and the environment where temperature and fog work together. This module can input hot air or cold air into the air inlet, and cooperate with other components to more comprehensively and accurately simulate the complex environmental factors at sea, thereby achieving accurate testing of the comprehensive performance of offshore photovoltaic modules.

[0040] The refrigeration / heating module 5 in the present invention mainly includes the following components: a compressor for refrigeration, which is used to compress the refrigerant gas to increase its pressure and temperature; a condenser, which uses a structure composed of metal pipes and heat sinks to dissipate the heat of the high-temperature and high-pressure refrigerant gas to the surroundings under the action of a fan to condense it into a liquid; a throttling device such as a capillary tube or an expansion valve, which controls the refrigerant flow and pressure to achieve pressure reduction and temperature reduction; and an evaporator that allows the low-temperature and low-pressure refrigerant liquid to absorb the heat of the surrounding air to vaporize and refrigerate. When heating, if heat pump technology is used, it also includes similar components mentioned above but has a different working process. It absorbs heat from the low-temperature environment and releases heat to the high-temperature environment through the reverse Carnot cycle. In addition, it may be equipped with heating elements such as electric heating wires, which are assisted by electric current heating when rapid heating is required or the heat pump is insufficient. At the same time, the inner leaf of the module can be provided with a fan to drive the air to circulate between the module and the test cavity, and send the treated air into the test cavity through the air inlet 4 to ensure that the temperature in the cavity is evenly distributed and form a stable air circulation system.

[0041] The salt solution / acid solution / alkali solution configuration module includes a mixing tank 12, a feeding pipe 13 provided on the mixing tank 12, and a metering pump 14 connected to the input port of the mixing tank 12. The metering pump 14 is connected to an external water source and is used to input a certain amount of water into the mixing tank 12. The output section of the mixing tank 12 is connected to the input port of the heat exchanger through an infusion pipe, and the output end of the heat exchanger is connected to a booster pump 15 through an infusion pipe, and the booster pump 15 is connected to the salt mist / acid mist / alkali mist nozzle module 7 through an infusion pipe.

[0042] Solution preparation process: The mixing tank 12 is the core container for preparing salt solution, acid solution or alkali solution. The function of the feeding pipe 13 is to add solutes, such as solid or concentrated solutions of salt, acid or alkali, to the mixing tank 12. The metering pump 14 is connected to an external water source and can accurately input a certain amount of water into the mixing tank 12. In this way, by controlling the input amount of solute and the amount of water added, a salt solution, acid solution or alkali solution with a specific concentration can be prepared in the mixing tank 12.

[0043] For example, when preparing a salt solution, a target mass of sodium chloride solid is added through the feeding pipe 13, and at the same time, the metering pump 14 injects an appropriate amount of water into the mixing tank 12 according to a preset volume or flow rate, and after stirring evenly, a salt solution of the desired concentration can be obtained.

[0044] Heat exchange process: The prepared solution enters the input port of the heat exchanger from the output section of the mixing tank 12 through the infusion tube. The heat exchanger plays a key role here, and it can exchange heat with the air outlet of the cooling / heating module 5. Since the salt mist, acid mist and alkaline mist in the offshore environment are often accompanied by specific temperature conditions, the temperature of the solution can be adjusted by the heat exchanger to make it close to the target experimental temperature and accurately match the air flow temperature input at the air inlet 4.

[0045] The heat of the solution is exchanged with the heat of the air outlet of the cooling / heating module 5, so that the solution reaches the target temperature, such as closer to the temperature of the gas, to better simulate the real environment at sea.

[0046] Spraying process: The solution after heat exchange in the heat exchanger reaches the booster pump 15 from the output end of the heat exchanger through the infusion tube. The booster pump 15 will increase the pressure of the solution so that the solution can be smoothly transported to the salt mist / acid mist / alkali mist nozzle module 7 through the infusion tube. When the solution reaches the nozzle module, under the action of pressure, the solution will be sprayed out in the form of mist, thereby creating a corrosive salt mist, acid mist or alkali mist environment in the test chamber 1, which is used to test the performance of the offshore photovoltaic module in this complex corrosive environment. This whole set of processes works together to provide a real and controllable corrosion environment simulation for the comprehensive performance test of offshore photovoltaic modules.

[0047] The photovoltaic module 3 operates under the combined conditions of the lighting environment simulated by the sunlight simulation lamp 10, the temperature environment created by the cooling / heating module 5, and the corrosion environment created by the salt mist / acid mist / alkali mist nozzle module 7. The multiple array photovoltaic panels in the photovoltaic module 3 are connected in parallel to form an electrical connection with the photovoltaic module tester 6. When the photovoltaic module 3 is working, the photovoltaic module tester 6 starts to collect various electrical performance parameters of the photovoltaic module 3, such as current, voltage, power, etc. Through real-time monitoring and analysis of these parameters, the performance of the photovoltaic module 3 in the simulated complex offshore environment can be accurately evaluated, so as to judge whether its power generation efficiency, stability and anti-environmental interference ability meet the requirements of offshore photovoltaic power generation, and provide key data support for the optimization and improvement of offshore photovoltaic modules.

[0048] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A comprehensive performance test system for offshore photovoltaic modules, characterized in that: include: A test chamber (1), wherein the test chamber (1) is provided with an air inlet (4); A photovoltaic support (2) is arranged in the test cavity (1); A photovoltaic module (3) is arranged on the photovoltaic support (2); A sunlight simulation lamp (10) is arranged in the test chamber (1); A photovoltaic module tester (6), electrically connected to the photovoltaic module (3); A cooling / heating module (5) is used to input hot air or cold air into the air inlet (4); A salt mist / acid mist / alkaline mist nozzle module (7) is arranged at the top of the test chamber (1); The salt solution / acid solution / alkali solution configuration module is connected to the salt mist / acid mist / alkali mist nozzle module (7) via an infusion pipeline, and the infusion pipeline exchanges heat with the air outlet of the cooling / heating module (5) via a heat exchanger (8).

2. According to claim 1, a comprehensive performance test system for offshore photovoltaic modules is characterized in that: A fan is provided at the air inlet (4).

3. The offshore photovoltaic module comprehensive performance test system according to claim 1, characterized in that: At least one sunshade (9) is provided on the photovoltaic support (2).

4. The offshore photovoltaic module comprehensive performance test system according to claim 3, characterized in that: The photovoltaic support (2) is provided with a plurality of insertion holes, and the sunshade (9) is inserted into the insertion holes via a connecting rod at the bottom, and the sunshade coverage area can be adjusted by rotating the sunshade (9).

5. The offshore photovoltaic module comprehensive performance test system according to claim 1, characterized in that: The salt mist / acid mist / alkali mist nozzle module (7) comprises a plurality of nozzles arranged in an array.

6. The offshore photovoltaic module comprehensive performance test system according to claim 1, characterized in that: The photovoltaic module (3) comprises a plurality of photovoltaic panels arranged in an array on the photovoltaic support (2); the plurality of photovoltaic panels are connected in parallel and electrically connected to the photovoltaic module tester (6).

7. The offshore photovoltaic module comprehensive performance test system according to claim 1, characterized in that: The photovoltaic module tester (6) comprises one of TH-PV30, TH-PV31, 6591A portable photovoltaic string tester, and 6595A outdoor multi-channel photovoltaic module tester; The sunlight simulation lamp (10) is a HMI4000W / DXS metal halide lamp sunlight simulator.

8. The offshore photovoltaic module comprehensive performance test system according to claim 1, characterized in that: The salt solution / acid solution / alkali solution configuration module comprises a mixing tank (12), a feeding pipe (13) arranged on the mixing tank (12), and a metering pump (14) connected to the input port of the mixing tank (12).

9. The offshore photovoltaic module comprehensive performance test system according to claim 8, characterized in that: The metering pump (14) is connected to an external water source and is used to input a fixed amount of water into the mixing tank (12).

10. The offshore photovoltaic module comprehensive performance test system according to claim 9, characterized in that: The output section of the mixing tank (12) is connected to the input port of the heat exchanger via a liquid infusion pipe, the output end of the heat exchanger is connected to a booster pump (15) via a liquid infusion pipe, and the booster pump (15) is connected to the salt mist / acid mist / alkali mist nozzle module (7) via a liquid infusion pipe.

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