A full-size photovoltaic module IAM test device and test method thereof

Abstract

The present invention relates to the technical field of testing devices, in particular to a full-size photovoltaic module IAM testing device and a testing method thereof, which has a crossbar, a rotating shaft is symmetrically arranged at the lower end of the crossbar relative to the ground and vertically arranged, a bearing is passed through the connection between one end of the rotating shaft and the crossbar; the other end of the rotating shaft is fixed on a bracket, and the photovoltaic module is fixed on the bracket. The full-size photovoltaic module IAM testing device and the testing method thereof can measure the power generation performance of the full-size photovoltaic module at different angles, so that the laboratory test results are closer to the actual photovoltaic power station power generation efficiency; the power generation efficiency of the photovoltaic module is guaranteed, and the income of the overall photovoltaic power station is improved.

Description

Technical Field

[0001] The invention relates to the technical field of testing devices, in particular to a full-size photovoltaic module IAM testing device and a testing method thereof. Background Art

[0002] With the continuous progress of society, photovoltaic power stations have developed rapidly. In photovoltaic power stations, photovoltaic modules are the core components of photovoltaic power stations, and their power generation efficiency directly affects the revenue of photovoltaic power stations. Usually, when evaluating the power generation efficiency of photovoltaic modules in the laboratory, the light source is used to illuminate vertically and measure the power generation efficiency of photovoltaic modules at this time. However, in actual outdoor applications, there are different angles between the incident sunlight and the photovoltaic modules according to different installation methods. The IEC61853-2 standard introduces the measurement method of the influence of the incident angle of sunlight on the power generation efficiency of photovoltaic modules. Due to the size of the simulated light source in the indoor laboratory and the size of the module installation fixture, all laboratories currently use test samples instead of finished module samples to avoid the situation where measurement cannot be made due to size problems. The existing test fixtures and test methods can only use module samples to measure the power generation efficiency of single photovoltaic cells at different angles, but the basic unit of a photovoltaic power station is a photovoltaic module. Generally, a photovoltaic module contains 60 to 144 single photovoltaic cells, which makes the data measured in the laboratory unable to match the actual application scenario, resulting in a large deviation between the laboratory sample test results and the actual power generation efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the above-mentioned background technology, a full-size photovoltaic module IAM testing device and a testing method thereof are provided, which can measure the power generation performance of the full-size photovoltaic module at different angles, so that the laboratory test results are closer to the actual photovoltaic power station power generation efficiency; ensure the power generation efficiency of the photovoltaic module and improve the overall photovoltaic power station income.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a full-size photovoltaic module IAM testing device, comprising a cross bar, a rotating shaft is symmetrically and vertically arranged at the lower end of the cross bar relative to the ground, a bearing is passed through the connection between one end of the rotating shaft and the cross bar; the other end of the rotating shaft is fixed on a bracket, and the photovoltaic module is fixed on the bracket.

[0005] To further illustrate, in the above technical solution, the bracket includes a first cross bar, a second cross bar, a first vertical bar and a second vertical bar; the first cross bar, the second cross bar, the first vertical bar and the second vertical bar are spliced ​​to form a hollow frame structure, and clamps are fixed on the first vertical bar and the second vertical bar, and the clamps are used for clamping and fixing photovoltaic components.

[0006] A full-size photovoltaic component IAM test method comprises the following steps: S1, turn on the main power switch, the computer power switch and the solar component tester power switch in sequence, and preheat the component pulse simulator for 15 minutes; S2, open the test software, and calibrate the light intensity of the component pulse simulator before testing; S3, select a standard solar cell according to the component to be tested, and perform calibration; S4, after the calibration is completed, install the control component vertically on the ground on the test frame, and when the standard temperature T and the small standard temperature Tmon in the test room are within the range of 25±1℃, confirm the control component parameters 3 to 5 times, and the calibration is completed; S5, remove the control component and place it; install the component to be tested, connect the red alligator clip at the input end to the positive pole of the component to be tested, and the black alligator clip Connect to the negative pole of the component, when the component temperature Tamb and the small label temperature Tmon in the test room are measured within the range of 25±1℃, enter the serial number of the component in the right dialog box, repeat the electrical performance test more than three times, observe its repeatability and stability, and save the records; S6, gradually rotate the mounting bracket to test the component in the angle range of -80° to 80°; S7, the rotational symmetry of the test device should be verified at rotation angles of -80° and 80°; S8, for each test at each angle, repeat the short-circuit current and temperature tests 3 to 5 times; S9, calculate and test the relative angle transmittance τ(θ) according to the formula: τ(θ)=Isc(θ) / (cos(θ)Isc(0)) where θ is the angle between the component and the incident light.

[0007] To further illustrate, in the above technical solution, the interval between -60° and +60° in S6 is not higher than 10°.

[0008] To further illustrate, in the above technical solution, the interval between -180° and -60° in S6 is not higher than 5°; the interval between +60° and 180° in S6 is not higher than 5°.

[0009] The beneficial effects of the present invention are as follows: a full-size photovoltaic module IAM test device and a test method thereof proposed in the present invention can measure the power generation performance of a full-size photovoltaic module at different angles, so that the laboratory test results are closer to the actual photovoltaic power station power generation efficiency; the power generation efficiency of the photovoltaic module is guaranteed and the income of the overall photovoltaic power station is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] The numbers in the accompanying drawings are: 1, horizontal bar, 2, rotating shaft, 3, bearing, 4, bracket, 5, photovoltaic module, 6, first horizontal bar, 7, second horizontal bar, 8, first vertical bar, 9, second vertical bar. DETAILED DESCRIPTION

[0013] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0014] In the present application, an electronic angle meter may be provided on the upper portion of the first cross bar 6 so as to clearly understand the rotation angle of the photovoltaic assembly.

[0015] See Figure 1 What is shown is a full-size photovoltaic module IAM test device, which has a cross bar 1. A rotating shaft 2 is symmetrically and vertically arranged at the lower end of the cross bar 1 relative to the ground, and a bearing 3 is passed through the connection between one end of the rotating shaft 2 and the cross bar 1; the other end of the rotating shaft 2 is fixed on a bracket 4, and a photovoltaic module 5 is fixed on the bracket 4.

[0016] Among them, the bracket 4 includes a first cross bar 6, a second cross bar 7, a first vertical bar 8 and a second vertical bar 9; the first cross bar 6, the second cross bar 7, the first vertical bar 8 and the second vertical bar 9 are spliced ​​to form a hollow frame structure, and clamps are fixed on the first vertical bar 8 and the second vertical bar 9, and the clamps are used to clamp and fix the photovoltaic component 5.

[0017] A full-size photovoltaic component IAM test method comprises the following steps: S1, turn on the main power switch, the computer power switch and the solar component tester power switch in sequence, and preheat the component pulse simulator for 15 minutes; S2, open the test software, and calibrate the light intensity of the component pulse simulator before testing; S3, select a standard solar cell according to the component to be tested, and perform calibration; S4, after the calibration is completed, install the control component vertically on the ground on the test frame, and when the standard temperature T and the small standard temperature Tmon in the test room are within the range of 25±1℃, confirm the control component parameters 3 to 5 times, and the calibration is completed; S5, remove the control component and place it; install the component to be tested, connect the red alligator clip at the input end to the positive pole of the component to be tested, and the black alligator clip Connect to the negative pole of the component, when the component temperature Tamb and the small label temperature Tmon in the test room are measured within the range of 25±1℃, enter the serial number of the component in the right dialog box, repeat the electrical performance test more than three times, observe its repeatability and stability, and save the records; S6, gradually rotate the mounting bracket to test the component in the angle range of -80° to 80°; S7, the rotational symmetry of the test device should be verified at rotation angles of -80° and 80°; S8, for each test at each angle, repeat the short-circuit current and temperature tests 3 to 5 times; S9, calculate and test the relative angle transmittance τ(θ) according to the formula: τ(θ)=Isc(θ) / (cos(θ)Isc(0)) where θ is the angle between the component and the incident light.

[0018] The interval between -60° and +60° in S6 is not higher than 10°. The interval between -180° and -60° in S6 is not higher than 5°. The interval between +60° and 180° in S6 is not higher than 5°.

[0019] Compared with traditional photovoltaic module testing devices, the present application has the following advantages: improved testing tooling, so that full-size modules of up to 2600mm×1400mm can be installed on it; the use of electronic goniometers allows the modules to achieve a full range of rotation from 0° to 360°; the use of full-size module IAM testing methods makes laboratory test results closer to the actual photovoltaic power station power generation efficiency.

[0020] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A full-size photovoltaic module IAM test method, characterized in that: The method comprises the following steps: S1, turning on the main power switch, the computer power switch and the solar module tester power switch in sequence, and preheating the module pulse simulator for 15 minutes; S2, opening the test software, and calibrating the light intensity of the module pulse simulator before testing; S3, selecting a standard solar cell according to the tested module, and performing calibration; S4. After the calibration is completed, install the control component vertically on the ground on the test stand. When the temperature of the standard component T and the temperature of the small standard piece Tmon in the test room are within the range of 25±1℃, confirm the control component parameters 3 to 5 times, and the calibration is completed; S5. Remove the control component and place it properly; install the component to be tested, connect the red alligator clip at the input end to the positive pole of the component to be tested, and connect the black alligator clip to the negative pole of the component. When the component temperature Tamb and the temperature of the small standard piece Tmon in the test room are within the range of 25±1℃, enter the serial number of the component in the right dialog box, repeat the electrical performance test more than three times, observe its repeatability and stability, and save the record; S6. Gradually rotate the mounting bracket to test the component in the angle range of -80° to 80°; S7. The rotational symmetry of the test device should be verified at the rotation angles of -80° and 80°; S8. Repeat the short-circuit current and temperature tests 3 to 5 times at each angle; S9. Calculate and test the relative angular transmittance τ(θ) according to the formula: τ(θ)=Isc(θ) / (cos(θ)Isc(0)) where θ is the angle between the component and the incident light.

2. A full-size photovoltaic module IAM testing method as claimed in claim 1, characterized in that: The interval between -60° and +60° in S6 is not higher than 10°.

3. A full-size photovoltaic module IAM testing method as claimed in claim 1, characterized in that: The interval between -180° and -60° in the S6 is not higher than 5°; the interval between +60° and 180° in the S6 is not higher than 5°.

4. A test device using the full-size photovoltaic module IAM test method as claimed in claim 1, characterized in that: It has a cross bar, the lower end of the cross bar is symmetrically and vertically provided with a rotating shaft relative to the ground, a bearing is passed through the connection between one end of the rotating shaft and the cross bar; the other end of the rotating shaft is fixed on a bracket, and a photovoltaic component is fixed on the bracket.

5. The test device of the full-size photovoltaic module IAM test method according to claim 4, characterized in that: The bracket includes a first cross bar, a second cross bar, a first vertical bar and a second vertical bar; the first cross bar, the second cross bar, the first vertical bar and the second vertical bar are spliced ​​to form a hollow frame structure, and clamps are fixed on the first vertical bar and the second vertical bar, and the clamps are used for clamping and fixing photovoltaic components.

Images