Evaluation method for accelerated aging test of photovoltaic module

Abstract

The invention discloses an evaluation method for the accelerated aging test of a photovoltaic module. The method comprises the following steps that: firstly, according to practical requirements, determining a test factor and level; designing an accelerated aging test scheme, adopting even design to optimize the accelerated aging test scheme to obtain the attenuation test data of photovoltaic module power under different stress combinations; carrying out regression analysis or multivariate regression analysis on the obtained test data; optimizing and verifying an obtained regression equation, and reckoning the power attenuation data of the module under other stress combinations through the obtained regression equation; and extrapolating to obtain the power attenuation data of the module under an outdoor normal operation condition. By use of the method, test cost and test time can be greatly reduced, and a purpose that module ageing is accelerated in short time to achieve the long-term reliability of the evaluation module is fully performed.

Description

technical field [0001] The invention relates to a photovoltaic module accelerated aging test evaluation method, which belongs to the technical field of photovoltaic module reliability testing. Background technique [0002] In recent years, the photovoltaic industry has developed rapidly, and the installed capacity of photovoltaic power generation in the country has continued to increase. At the same time, the reliability of long-term outdoor operation of photovoltaic modules has attracted increasing attention. The photovoltaic system is mainly composed of photovoltaic modules, inverters, photovoltaic brackets, cables, cabinets, monitoring systems, boosting systems, etc. As one of the most important components of the photovoltaic system, photovoltaic modules directly affect the power generation of the photovoltaic system. During the outdoor operation of photovoltaic modules, they are affected by a variety of complex climate and environmental conditions, which lead to power at...

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Problems solved by technology

The IEC61215 standard stipulates the test method for the environmental test of photovoltaic modules, but it can only test and certify the quality of photovoltaic modules, and cannot guarantee the reliability of the long-term outdoor operation of the modules and the 25-year operating life of the modules. Therefore, There is an urgent need for an accelerated aging test method, so as to accelerate the aging of photovoltaic modules in a short period of time, analyze the attenuation of the components after accelerated aging, and obtain the long-term reliability of the components by analyzing the test parameters of accelerated aging of photovoltaic modules Research result

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