Outdoor testing system and method for photovoltaic module

Abstract

The invention provides an outdoor testing method for a photovoltaic module, and the method comprises the steps: setting a reference IV curve under the standard testing conditions; collecting an IV curve of a detected photovoltaic module and the environment data of the detected photovoltaic module; obtaining a standard testing condition IV curve converted according to the environment data, and theopen-circuit voltage Voc and short-circuit current Isc on the IV curve; comparing the reference IV curve with the open-circuit voltage Voc and short-circuit current Isc, and obtaining an effective irradiance error and a battery temperature error; and correcting the IV curve of the detected photovoltaic module according to the effective irradiance error and the battery temperature error. The methodintroduces a reference photovoltaic module and the reference IV curve of the reference photovoltaic module under the standard testing conditions, combines the outdoor irradiance error and battery temperature error, achieves the correction of the IV curve of the detected photovoltaic module, reduces the impact from the calibration process of an irradiance meter and spectrum matching, and achievesthe precise measurement of the outdoor I-V characteristics of a crystalline silicon photovoltaic module.

Description

technical field [0001] The invention relates to photovoltaic power generation technology, in particular to an outdoor testing system for photovoltaic components and a testing method thereof. Background technique [0002] As a green energy product, photovoltaic modules have been widely used all over the world, and they can continue to provide electric energy even in harsh outdoor environments. Due to the long-term use outdoors, photovoltaic modules must have strong weather resistance. Before the photovoltaic modules leave the factory, they must undergo various rigorous electrical performance tests and reliability tests, which will improve the power and reliability of photovoltaic modules. are of great research significance. [0003] When testing the I-V characteristics of photovoltaic modules, solar single-pulse simulators and scanning electronic loads are currently used to test photovoltaic modules in a standard test environment (STC). After the photovoltaic modules are in...

AI Technical Summary

Problems solved by technology

After the photovoltaic modules are installed in the power station, power tests are often carried out on the site of the power station. However, due to the variety of outdoor conditions, the test equipment is relatively simple, resulting in a large difference between the outdoor STC test results and the indoor STC test results.

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