Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Analysis of Module Mismatch Loss in Solar PV String and Feasibility Study for Improvement Method

태양광 PV 스트링에서의 모듈 부정합 손실의 분석 및 개선 기법 타당성 연구

  • Ahn, Hee-Wook (Dept. of Electronic Engineering, Kumoh National Institute of Technology)
  • 안희욱 (금오공과대학교 전자공학부)
  • Published : 2009.02.28
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Abstract

In this paper, the power loss due to PV module mismatch in PV string is analyzed and a mismatch compensation method is proposed to improve the efficiency of PV system. The analysis of mismatch loss using PV model simulation reveals that the mismatch module may decrease the total efficiency because the MPPT function of power conditioner make the PV system operate at the local maximum point. The mismatch loss can be severe if the maximum power point current of mismatch module is less than that of string. The proposed compensation method which is simply implemented with a buck type converter shows the possibility to remove the mismatch loss. The effectiveness of the analysis and compensation method is verified by a prototype experiment.

Keywords

References

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