The analysis of electrical characteristics with Micro-crack in PV module
Micro-cracks에 의한 PV 모듈의 전기적 특성 분석
- Song, Young-Hun (Korea Institute of Energy Research) ;
- Ji, Yand-Geun (Korea Institute of Energy Research) ;
- Kim, Kyung-Soo (Korea Institute of Energy Research) ;
-
Kang, Gi-Hwan
(Korea Institute of Energy Research)
;
-
Yu, Gwon-Jong
(Korea Institute of Energy Research)
;
-
Ahn, Hyung-Gun
(KonKuk University)
;
-
Han, Deuk-Young
(KonKuk University)
- 송영훈 (한국에너지기술연구원) ;
- 지양근 (한국에너지기술연구원) ;
- ;
-
강기환
(한국에너지기술연구원)
;
-
유권종
(한국에너지기술연구원)
;
-
안형근
(건국대학교)
;
-
한득영
(건국대학교)
- Published : 2011.04.07
Abstract
In this paper, we analyzed the electrical characteristics with Micro-cracks in Photovoltaic module. Micro cracks are increasing the breakage risk over the whole value chine from the wafer to the finished module, because the wafer or cell is exposed to mechanical stress. And The solar cells have to with stand the stress under out door operation in the finished module. Here the mechanical stress is induced by temperature changes and mechanical loads from wind and snow. So, we experimentally analyze the direct impact of micro-cracks on the module power and the consequences after artificial aging. The first step, we made micro-cracks in PV module by mechanical load test according to IEC 61215. Next, PV modules applied the thermal cycling test, because micro-cracks accelerated aging by thermal cycling test, according to IEC61215. Before every test, we checked output and EL image of PV module. As the result of first step, we detected little power loss(0.9%). But after thermal cycling test increased power loss about 3.2%.