阅读说明：本技术 一种光伏组件水下电势诱导衰减的测试装置 (Testing device for underwater potential induced attenuation of photovoltaic module ) 是由 高祺 C.莫诺克劳索斯 章翊驰 于 2021-02-25 设计创作，主要内容包括：本发明涉及一种光伏组件水下电势诱导衰减的测试装置,包括壳体和设于壳体中的水雾发生腔和测试腔；水雾发生腔和测试腔通过多孔隔板分隔；水雾发生腔中设有注水组件、水雾发生单元、水加热单元；单侧举升组件上设有加热金属板,光伏组件设于所述加热金属板上；所述测试腔中还设有测试架、电源模块、电表单元；加热金属板和高电压输出单元分别与电源模块连接,高电压输出单元与光伏组件的主栅线连接,构成负偏压施加结构。与现有技术相比,本发明可模拟光伏组件具体的运行工况,仅需监测并联电阻随时间的变化曲线来分析电池片的衰减情况,避免了现有技术中复杂的测试过程,并可以高效率地调变湿度场景,以此满足测试需求。(The invention relates to a testing device for underwater potential induced attenuation of a photovoltaic module, which comprises a shell, a water mist generation cavity and a testing cavity, wherein the water mist generation cavity and the testing cavity are arranged in the shell; the water mist generating cavity and the testing cavity are separated by a porous partition plate; a water injection assembly, a water mist generation unit and a water heating unit are arranged in the water mist generation cavity; the single-side lifting assembly is provided with a heating metal plate, and the photovoltaic assembly is arranged on the heating metal plate; the test cavity is also internally provided with a test frame, a power supply module and an ammeter unit; the heating metal plate and the high-voltage output unit are respectively connected with the power module, and the high-voltage output unit is connected with the main grid line of the photovoltaic module to form a negative bias applying structure. Compared with the prior art, the method can simulate the specific operation condition of the photovoltaic module, only needs to monitor the change curve of the parallel resistor along with time to analyze the attenuation condition of the cell, avoids the complex test process in the prior art, and can efficiently modulate the humidity scene so as to meet the test requirement.)

1. The device for testing the underwater potential induced attenuation of the photovoltaic module is characterized by comprising a shell (0), and a water mist generating cavity and a testing cavity which are arranged in the shell (0);

the water mist generating cavity and the testing cavity are separated by a porous partition plate (1);

a water injection assembly, a water mist generation unit (2) and a water heating unit (3) are arranged in the water mist generation cavity;

a unilateral lifting assembly is arranged in the test cavity, a heating metal plate (10) is arranged on the unilateral lifting assembly, the photovoltaic assembly is arranged on the heating metal plate (10), and the inclination posture of the photovoltaic assembly can be adjusted through unilateral lifting;

the test cavity is also internally provided with a test frame (4), a power module (5) and an ammeter unit (9);

a high-voltage output unit (7) is arranged on the test frame (4);

the heating metal plate (10) and the high-voltage output unit (7) are respectively connected with the power module (5), and the high-voltage output unit (7) is connected with a main grid line of the photovoltaic module to form a negative bias applying structure;

the photovoltaic module positive and negative electrode two ends are also connected with a test resistor (6) in parallel, and an ammeter unit (9) measures voltage values at two ends of the test resistor (6).

2. The photovoltaic module underwater potential induced attenuation test device according to claim 1, characterized in that the power supply module (5) comprises a high voltage power supply.

3. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 1, wherein the photovoltaic module is a single solar cell or a combination of a plurality of solar cells.

4. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 1, characterized in that one or both ends of the heating metal plate (10) are matched with a heater.

5. The photovoltaic module underwater potential induced attenuation test device according to claim 1, characterized in that the high voltage output unit (7) is a sliding connector;

the testing jig (4) is fixed on the inner wall surface of the shell (0), a sliding rail is arranged on the lower surface of the testing jig (4), and the high-voltage output unit (7) is movably arranged on the sliding rail and can linearly displace along the sliding rail.

6. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 5, wherein one end of the high voltage output unit (7) is connected with the high voltage output unit (7) through a wire, the other end of the high voltage output unit is provided with an elastic wire, one end of the elastic wire is provided with a clamping terminal, and the clamping terminal is connected with a main grid line of the photovoltaic module.

7. The photovoltaic module underwater potential induced attenuation test device according to claim 1, characterized in that the electric meter unit (9) is in wireless communication connection with an external computer terminal.

8. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 1, wherein the water injection module comprises an electromagnetic valve (8) and a water feeding pump (11) which are arranged on a water inlet of the water mist generation cavity, and the water level in the water mist generation cavity can be controlled by injecting water flow so as to control the distance between the water level and the photovoltaic module;

and a stirring paddle is also arranged in the water mist generation cavity.

9. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 1, wherein the single-side lifting assembly comprises a lifting electric cylinder (12) and a supporting plate (13), one side of the supporting plate (13) is hinged on the porous partition plate (1), and meanwhile, an output rod of the lifting electric cylinder (12) is abutted against the lower surface of the supporting plate (13).

10. The device for testing the underwater potential induced attenuation of the photovoltaic module according to claim 1, wherein a temperature sensor (14) and a humidity sensor (15) are further arranged in the test cavity, and the temperature sensor (14) and the humidity sensor (15) are in wireless communication connection with an external computer terminal.

Technical Field

The invention relates to the field of photovoltaic testing, in particular to a testing device for underwater potential induced attenuation of a photovoltaic module.

Background

Along with the reduction of the components of the cost of the photovoltaic components, the development mode of the photovoltaic power station is greatly expanded, wherein the overwater photovoltaic power station becomes one of the directions of the most promising future photovoltaic power station due to the characteristics of low occupied area cost, high environmental friendliness and the like.

The available space of the photovoltaic power station on water is large, the photovoltaic modules are generally connected in a long photovoltaic array mode, and the voltage of the array terminal can reach 1000-1500V. In addition, the general humidity of the environment where the overwater photovoltaic power station is located is large, the condition that the components are even immersed in water exists in a specific application scene, and the environmental condition is more complex than that of a ground power station. The high voltage and high humidity conditions make photovoltaic modules in waterborne photovoltaic power stations more susceptible to potential-induced degradation. Because the test standard and the method of the photovoltaic component for the photovoltaic power station on water are still in a starting stage, no corresponding potential induced attenuation test device exists in the industry.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides a testing device for the underwater potential induced attenuation of a photovoltaic module, which can simulate the specific operation condition of the photovoltaic module, only needs to monitor the change curve of a parallel resistor along with time to analyze the attenuation condition of a battery piece, avoids the complex testing process in the prior art, and can efficiently modulate a humidity scene so as to meet the testing requirement.

The purpose of the invention can be realized by the following technical scheme:

the testing device for the underwater potential induced attenuation of the photovoltaic module in the technical scheme comprises a shell, and a water mist generating cavity and a testing cavity which are arranged in the shell;

the water mist generating cavity and the testing cavity are separated by a porous partition plate;

a water injection assembly, a water mist generation unit and a water heating unit are arranged in the water mist generation cavity;

a unilateral lifting assembly is arranged in the test cavity, a heating metal plate is arranged on the unilateral lifting assembly, the photovoltaic assembly is arranged on the heating metal plate, and the inclination posture of the photovoltaic assembly can be adjusted through unilateral lifting;

the test cavity is also internally provided with a test frame, a power supply module and an ammeter unit;

the test frame is provided with a high-voltage output unit;

the heating metal plate and the high-voltage output unit are respectively connected with the power module, and the high-voltage output unit is connected with a main grid line of the photovoltaic module to form a negative bias applying structure;

and the positive and negative ends of the photovoltaic module are also connected with a test resistor in parallel, and the ammeter unit measures voltage values at the two ends of the test resistor.

Further, the power module comprises a high-voltage power supply, and the output voltage is 50-2000V.

Further, the photovoltaic module is a single solar cell or a combination of a plurality of solar cells.

Further, a heater is matched with one end or two ends of the heating metal plate.

Further, the high voltage output unit is a sliding connector;

the testing jig is fixed on the inner wall surface of the shell, a sliding rail is arranged on the lower surface of the testing jig, and the high-voltage output unit is movably arranged on the sliding rail and can linearly displace along the sliding rail.

Furthermore, one end of the high-voltage output unit is connected with the high-voltage output unit through a wire, the other end of the high-voltage output unit is provided with an elastic wire, one end of the elastic wire is provided with a clamping terminal, and the clamping terminal is connected with a main grid line of the photovoltaic module.

Further, the electric meter unit is in wireless communication connection with an external computer terminal.

Furthermore, the water injection assembly comprises an electromagnetic valve and a water feed pump which are arranged on a water inlet of the water mist generation cavity, and the water level height in the water mist generation cavity can be controlled through the injection of water flow so as to control the distance between the water surface and the photovoltaic assembly;

and a stirring paddle is also arranged in the water mist generation cavity.

Furthermore, the unilateral lifting assembly comprises a lifting electric cylinder and a supporting plate, wherein one side of the supporting plate is hinged to the porous partition plate, and meanwhile, an output rod of the lifting electric cylinder is abutted against the lower surface of the supporting plate.

Furthermore, a temperature sensor and a humidity sensor are further arranged in the test cavity and are in wireless communication connection with an external computer terminal.

Compared with the prior art, the invention has the following technical advantages:

1) according to the technical scheme, the photovoltaic module is heated to a specific temperature through the heating metal plate, the heating metal plate simultaneously achieves the purpose of heating and being electrically connected with the back electrode of the photovoltaic module, meanwhile, the cross-linking of a photovoltaic module adhesive film can be achieved through heating, so that the specific operation working condition of the photovoltaic module can be simulated, the attenuation condition of the battery piece is analyzed only by monitoring the change curve of the parallel resistance along with time, and the complex test process in the prior art is avoided.

2) According to the technical scheme, potential induced attenuation equipment of the overwater photovoltaic module is researched and established, the water level height in the water mist generation cavity is controlled through the injection of water flow, the distance between the water surface and the photovoltaic module is controlled, the humidity value in the test cavity is rapidly adjusted through the water heating unit and the water mist generation unit, and the humidity scene is efficiently modulated, so that the test requirement is met.

3) The photovoltaic module composed of the unilateral lifting module in the technical scheme is set to be in a posture closer to the working state of the actual photovoltaic module, and the potential induced attenuation test can be carried out based on different inclined postures.

Drawings

Fig. 1 is a schematic structural diagram of a testing apparatus for underwater potential induced attenuation of a photovoltaic module in the technical scheme.

In the figure: 1. the device comprises a porous partition plate, 2, a water mist generation unit, 3, a water heating unit, 4, a test frame, 5, a power supply module, 6, a test resistor, 7, a high-voltage output unit, 8, an electromagnetic valve, 9, an electric meter unit, 10, a heating metal plate, 11, a water feeding pump, 12, a lifting electric cylinder, 13, a support plate, 14, a temperature sensor, 16, a humidity sensor, 17, a baffle, 18 and a stirring paddle.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments.

The testing device for the underwater potential induced attenuation of the photovoltaic module in the embodiment comprises a shell 0, and a water mist generation cavity and a testing cavity which are arranged in the shell 0, and referring to fig. 1, when materials are specifically selected, the shell 0 is made of rigid high polymer materials. The object tested in the technical scheme is a photovoltaic module which can be a single solar cell or a combination of a plurality of solar cells. A temperature sensor 14 and a humidity sensor 15 are further arranged in the testing cavity, and the temperature sensor 14 and the humidity sensor 15 are in wireless communication connection with an external computer terminal.

The water mist generation cavity and the test cavity are separated by the porous partition plate 1, the porous partition plate 1 plays a role in separation and support, the porous partition plate is selected to be a rigid plate with holes, and a plurality of small holes are formed in the rigid plate, so that the introduction of water or water vapor is realized, and the regulation of a humidity scene is extremely important.

A water injection assembly, a water mist generation unit 2 and a water heating unit 3 are arranged in the water mist generation cavity, wherein the water mist generation unit 2 is a humidifier.

Be equipped with the unilateral in the test chamber and lift the subassembly, the unilateral is lifted and is equipped with heating metal sheet 10 on the subassembly, and photovoltaic module locates on the heating metal sheet 10, lift through the unilateral and can carry out the adjustment of photovoltaic module slope gesture, still be equipped with test jig 4, power module 5, ammeter unit 9 in the test chamber. The unilateral lifting assembly comprises a lifting electric cylinder 12 and a supporting plate 13, one side of the supporting plate 13 is hinged to the porous partition plate 1, meanwhile, an output rod of the lifting electric cylinder 12 is abutted to the lower surface of the supporting plate 13, two sides of the supporting plate 13 are provided with baffle plates, one end of each baffle plate is used for preventing the photovoltaic assembly from sliding downwards, and the other end of each baffle plate is used for avoiding the end part of the lifting electric cylinder 12 from being separated from the supporting plate 13. The photovoltaic module formed by the unilateral lifting module is arranged in an attitude closer to the working state of the actual photovoltaic module, and the potential induced attenuation test can be carried out based on different inclined attitudes.

The testing frame 4 is provided with a high-voltage output unit 7, the heating metal plate 10 and the high-voltage output unit 7 are respectively connected with the power module 5, and the high-voltage output unit 7 is connected with a main grid line of the photovoltaic assembly to form a negative bias applying structure; the photovoltaic module positive and negative terminals are also connected in parallel with a test resistor 6, and an ammeter unit 9 measures voltage values at the two ends of the test resistor 6. One or both ends of the heating metal plate 10 are matched with heaters.

According to the technical scheme, the photovoltaic module is heated to a specific temperature through the heating metal plate 10, the heating metal plate 10 simultaneously achieves the purpose of heating and being electrically connected with the back electrode of the photovoltaic module, meanwhile, the cross-linking of a photovoltaic module adhesive film can be achieved through heating, so that the specific operation working condition of the photovoltaic module can be simulated, the attenuation condition of the cell piece is analyzed only by monitoring the change curve of the parallel resistance along with time, and the complex test process in the prior art is avoided.

The power module 5 comprises a high-voltage power supply, the output voltage is 50-2000V, the potential induced attenuation of the photovoltaic module is accelerated by adopting high-temperature water and water mist in the embodiment, the 100% RH humidity condition is realized, and 1500V high voltage is loaded on the output end and the surface of the photovoltaic module during testing.

The high-voltage output unit 7 is a sliding connector, the testing jig 4 is fixed on the inner wall surface of the shell 0, a sliding rail is arranged on the lower surface of the testing jig 4, and the high-voltage output unit 7 is movably arranged on the sliding rail and can linearly displace along the sliding rail, so that the adjustment of a voltage application position is facilitated.

One end of the high-voltage output unit 7 is connected with the high-voltage output unit 7 through a wire, the other end of the high-voltage output unit is provided with an elastic wire, one end of the elastic wire is provided with a clamping terminal, and the clamping terminal is connected with a main grid line of the photovoltaic assembly. The electricity meter unit 9 is connected with an external computer terminal in wireless communication.

The water injection subassembly is including locating solenoid valve 8 and the feed pump 11 on the water inlet of water smoke generation chamber, can control the water level height in the water smoke generation chamber through the injection control water flow to this distance between control surface of water and the photovoltaic module. The water mist generation cavity is also provided with a stirring paddle 18 and a matched servo motor, so that the actual working scene, such as a sea surface wave scene, is simulated through the turbulence of water. The water level height in the water mist generating cavity is controlled through the injection of water flow, the distance between the water surface and the photovoltaic module is controlled, the humidity value in the testing cavity is rapidly adjusted through the water heating unit and the water mist generating unit, and the humidity scene is efficiently adjusted, so that the testing requirement is met.

The embodiments described above are described to facilitate an understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.