Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)

The Korean Institute of Power Electronics (전력전자학회)
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Converter to Compensate for PV Module Mismatch in Solar PV String

PV 스트링의 모듈 부정합 보상용 컨버터

  • Park, Gi-Yob (Dept. of Electronic Engineering, Kumoh National Institute of Technology) ;
  • Ahn, Hee-Wook (Dept. of Electronic Engineering, Kumoh National Institute of Technology)
  • 박기엽 (금오공과대학교 전자공학부) ;
  • 안희욱 (금오공과대학교 전자공학부)
  • Published : 2009.11.27
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Abstract

Mismatch of electrical characteristics of modules in PV string invokes mismatch power loss. The mismatch occurs due to various causes such as shadow, aging, contamination, and module exchange. The concept of mismatch compensation converter(MCC) is presented in this paper to remedy the mismatch loss problem. MCC is connected to irregular modules only. MCC is composed of dc-dc converter and MPPT controller. It is noted that MPPT algorithm is employed to control MCC and is effective for maximum power available from irregular modules. The selection guide of MPPT control period is given based on the period of MPPT in PCU. The effectiveness of the MCC is verified by a prototype experiment.

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