한국태양에너지학회:학술대회논문집

The Korean Solar Energy Society (한국태양에너지학회)
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Analysis of degradation by hotspot heating in amorphous silicon PV module

a-Si 태양전지 모듈의 hotspot에 의한 열화현상 연구

  • Yoon, Na-Ri (Dept. of Electrical Engineering, Graduate School, Konkuk University) ;
  • Jung, Tae-Hee (Dept. of Electrical Engineering, Graduate School, Konkuk University) ;
  • Min, Yong-Ki (Dept. of Electrical Engineering, Graduate School, Konkuk University) ;
  • Kang, Ki-Hwan (Photovoltaic Research Group, Korea Institute of Energy Research) ;
  • Ahn, Hyeung-Keun (Dept. of Electrical Engineering, Konkuk University) ;
  • Han, Deuk-Young (Dept. of Electrical Engineering, Konkuk University)
  • 윤나리 (건국대학교 대학원 전기공학과) ;
  • 정태희 (건국대학교 대학원 전기공학과) ;
  • 민용기 (건국대학교 대학원 전기공학과) ;
  • 강기환 (한국에너지기술연구원 태양광연구단) ;
  • 안형근 (건국대학교 전기공학과) ;
  • 한득영 (건국대학교 전기공학과)
  • Published : 2011.04.07
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Abstract

There are some degradation factors for amorphous silicon solar cells. Light inducing is one of the factor that explained by Staebler-Wronski effect. Also, hotspot heating could be the reason that makes amorphous silicon solar cell degrade. Hotspot heating is occurred when a solar cell is shaded so this work is investigated into two types of shading condition and how these affect to solar cell differently. Reduced irradiance for whole cell and partially shaded as 0($W/m^2$) while the other part of cell is soaking as 1000($W/m^2$) of irradiance are two conditions that are experimented. The two types of shading show different characteristics of degradations. The result shows that partially shaded cell dropped maximum powerless and slower. Also sudden drop points have shown that should be concerned to decide the number of cells for a string. Otherwise, the current through a shaded cell might flow more than cell's capability. It makes cell and module damaged. This work would help to manufacture modules.

Keywords