Transactions on Electrical and Electronic Materials

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Optimal Design of PV Module with Bypass Diode to Reduce Degradation due to Reverse Excess Current

  • Jung, Tae-Hee (Photovoltaic Laboratory, Korea Institute of Energy Research(KIER)) ;
  • Kang, Gi-Hwan (Photovoltaic Laboratory, Korea Institute of Energy Research(KIER)) ;
  • Ahn, Hyung-Keun (Department of Electrical Engineering, Konkuk University)
  • Received : 2014.08.19
  • Accepted : 2014.09.22
  • Published : 2014.10.25
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Abstract

In this paper, we present an economical and practical standard to install a bypass diode in a thin-film PV module. This method helps to reduce heat generation and to prevent module degradation due to excess current from reverse bias. The experimental results confirm that for different numbers of solar cells, there is a relation between the excess reverse current and the degradation of solar cells in a-Si:H modules. The optimal number of solar cells that can be connected per bypass diode could be obtained through an analysis of the results to effectively suppress the degradation and to reduce the heat generated by the module. This technique could be expanded for use in high power crystalline Si PV modules.

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References

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