The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Control Method to Mitigate the Influence of Input Capacitor in Photovoltaic Power Curtailment

태양광 출력 감발 시 입력 커패시터 영향 완화를 위한 제어 방법

  • Yang, Hyoung-Kyu (School of Electrical and Electronic Eng., Yonsei University) ;
  • Park, Jung-Wook (School of Electrical and Electronic Eng., Yonsei University)
  • Received : 2020.11.20
  • Accepted : 2021.01.04
  • Published : 2021.04.20
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Abstract

This study proposes a control method to mitigate the influence of input capacitors in photovoltaic power curtailment. The influence is analyzed by the power flow in the photovoltaic system. In conventional power curtailment, the power injected to the grid may be increased momentarily because the influence of the input capacitor on the power injected to the grid is not considered. The proposed method limits the change rate of photovoltaic array voltage to prevent a momentary increase in the power injected to the grid. The effectiveness of proposed method, which reduces power overshoot, is verified by experimental tests. The proposed method enables the power grid to operate stably in photovoltaic power curtailment.

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References

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