A performance test circuit and test method of a photovoltaic module

A technology for photovoltaic modules and test circuits, which is used in the measurement of electrical variables, resistance/reactance/impedance, measurement devices, etc.

Inactive Publication Date: 2017-12-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a performance test circuit for photovoltaic modules to solve the problem that the existing test equipment is troublesome to use and cannot be quickly detected, and at the same time provide a test method using the test circuit

Method used

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  • A performance test circuit and test method of a photovoltaic module
  • A performance test circuit and test method of a photovoltaic module
  • A performance test circuit and test method of a photovoltaic module

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Embodiment Construction

[0023] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0024] Such as figure 1 Shown is a schematic diagram of the invention simulating sunlight for illumination. After the concave mirror 2 is irradiated by the xenon lamp 1, the reflected light formed is reflected in parallel to the photovoltaic module to be tested, and the photovoltaic module to be tested is subjected to simulated illumination.

[0025] Such as figure 2 Shown is the performance test circuit embodiment of the photovoltaic module of the present invention, in the figure, V D , diode, R sh and R s The whole is equivalent to a photovoltaic module, where, V D is the photovoltaic voltage generated by the photovoltaic module to be tested under the simulated illumination of the xenon lamp, I D is the current flowing through the diode, R sh is the parallel internal resistance of the photovoltaic module to be tested, R s is the seri...

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Abstract

The invention discloses a performance test circuit and a test method of a photovoltaic module. The circuit includes two connection terminals for connecting the positive and negative poles of the photovoltaic module. A resistance bridge is connected in series between the two connection terminals. The resistance bridge Including adjustable resistance R, two terminals for accessing equivalent insulation resistance and two adjustment resistors R1, R2, the first series branch composed of adjustable resistance R and first adjustment resistance R1 and used for accessing The two terminals of the equivalent insulation resistance are connected in parallel with the second series branch composed of the second adjusting resistor R2, and an ammeter is connected between the series points of the two series branches. The performance testing circuit and testing method of the photovoltaic module of the present invention utilizes a resistance bridge circuit to accurately measure the insulation resistance of the photovoltaic module. Evaluate the quality and insulation performance, and realize the parameter test under the actual light.

Description

technical field [0001] The invention belongs to the technical field of industrial measurement and control, and in particular relates to a test circuit and a test method for quickly detecting the performance of a photovoltaic module. Background technique [0002] With the increasing energy crisis and environmental problems, the application of solar photovoltaic power stations is becoming more and more extensive. At present, solar energy technology has been more and more widely used in all walks of life, but when using solar energy, it is necessary to test the performance of photovoltaic modules (mainly insulation resistance), because once the insulation failure of the system is easy to occur Safety accidents, thereby causing personal and property harm. [0003] According to 10.3.4 of the insulation test in 10.3 of "Determining whether the insulation between the current-carrying part of the photovoltaic module and the module frame or outside is good" in the international stan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/08
Inventor 朱美玲丁晓王伟朱翠丽江新峰胡筱雷振锋杨恢宏
Owner STATE GRID CORP OF CHINA
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