장기신뢰성 시험을 통한 태양광 모듈의 가속계수 및 환산수명의 관계
Relationship between Acceleration Factor and Equivalent Lifetime of Solar Modules in Long-Term Reliability Testing
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초록
Photovoltaic modules are tested and certified based on IEC standards, which have been revised continuously since the 1970s. As new information is added to the existing procedures, each test method and sequence builds on the previous test, and as the industry evolved, the IEC test standards became the only standards recognized by both module manufacturers and buyers. However, experts recognize that the IEC test conditions do not match field conditions and that they are too different from field conditions for single tests to be conducted without considering various stressors in combination. In addition, given the circumstances of physical time and economics, it is not feasible to wait 20 or 25 years each time to determine what happens after the module is deployed in the field. In this study, the acceleration factor and equivalent life were calculated by applying an accelerated composite test, rather than a single test, as in the IEC standards, simulating actual field conditions. As a result, we propose a test model that can reduce the test time and save about 40% in terms of equivalent life.
Abstract
Photovoltaic modules are tested and certified based on IEC standards, which have been revised continuously since the 1970s. As new information is added to the existing procedures, each test method and sequence builds on the previous test, and as the industry evolved, the IEC test standards became the only standards recognized by both module manufacturers and buyers. However, experts recognize that the IEC test conditions do not match field conditions and that they are too different from field conditions for single tests to be conducted without considering various stressors in combination. In addition, given the circumstances of physical time and economics, it is not feasible to wait 20 or 25 years each time to determine what happens after the module is deployed in the field. In this study, the acceleration factor and equivalent life were calculated by applying an accelerated composite test, rather than a single test, as in the IEC standards, simulating actual field conditions. As a result, we propose a test model that can reduce the test time and save about 40% in terms of equivalent life.