한국태양에너지학회:학술대회논문집

The Korean Solar Energy Society (한국태양에너지학회)
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The Electrical Characteristics of Shading Effect in Photovoltaic Module

PV모듈에서 그림자에 의한 전기적 특성

  • Kim, Seung-Tae (Dept. of Electrical Engineering, Konkuk University) ;
  • Kang, Gi-Hwan (Photovoltaic Research Center, Korea Institute of Energy Research) ;
  • Park, Ji-Hong (Dept. of Electrical Engineering, Konkuk University) ;
  • Ahn, Hyung-Keun (Dept. of Electrical Engineering, Konkuk University) ;
  • Yu, Gwon-Jong (Photovoltaic Research Center, Korea Institute of Energy Research) ;
  • Han, Deuk-Young (Dept. of Electrical Engineering, Konkuk University)
  • 김승태 (건국대학교 대학원 전기공학과) ;
  • 강기환 (한국에너지기술연구원 태양광발전센터) ;
  • 박지홍 (건국대학교 대학원 전기공학과) ;
  • 안형근 (건국대학교 대학원 전기공학과) ;
  • 유권종 (한국에너지기술연구원 태양광발전센터) ;
  • 한득영 (건국대학교 대학원 전기공학과)
  • Published : 2008.04.12
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Abstract

In this paper, we study the electric characteristics of shading effects in photovoltaic module in case of outdoor operation. When fabricating PV module, solar cells are connected serially to obtain the high voltage because of its low open circuit voltage. And total current is determined by lowest current among solar cells. When the shading happens on PV module's surface, the current of shaded solar cell determine the total current flow. Because of this, generally by-pass diode is installed on junction box. The bypass diode operate when revered and shaded solar cell's voltage is over 0.6 voltage. The reverse-biased solar cell gives reduced maximum power of PV module and might give negative effect on durability. So, adequate by-pass installation and selection is needed.

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