Bulletin of the Korea Photovoltaic Society (한국태양광발전학회지)

Korea Photovoltaic Society (한국태양광발전학회)
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옥외 태양광 발전 시스템의 Potential Induced Degradation 진단 및 야간 역전압 회복 연구

  • 최훈주 ((주)신성이엔지 솔라사업부문 기술지원팀) ;
  • 김광현 ((주)신성이엔지 솔라사업부문 기술지원팀) ;
  • 장동식 ((주)신성이엔지 솔라사업부문 기술지원팀) ;
  • 배수현 (고려대학교 신소재공학과) ;
  • 박노창 (전자부품연구원 융복합전자소재 연구센터) ;
  • 오원욱 (전자부품연구원 융복합전자소재 연구센터)
  • Published : 2017.09.30
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Abstract

The potential induced degradation (PID) phenomenon shows severe power loss within several years from the initial installation of solar power system. The accumulated power loss by PID is inevitable because the PID is suspected only if the power loss exceeds several percent. In this paper, we analyzed the cases of PID diagnosis and recovery by visiting the suspected PID site about 17 months after the installation of the 100kW PV system. The power difference of the two 50kW inverters was more than 20kWh, and the PR difference was more than 8%. From the beginning of the installation, the difference in power gradually increased. The recovery was observed for about 7 months by applying 1000V in the reverse bias at night. As a result, the power difference of the two inverters was recovered to within 2kWh. In the case of a power station suffering from PID in the field, it will be helpful for stable development operation by quick diagnosis and problem solving.

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References

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