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The Photovoltaic (PV) has been a key factor in driving the shift towards clean energy and promoting the expansion of sustainable energy. The integration of Superconducting Fault Current Limiters (SFCLs) in PV plants provides an effective way to limit fault currents and enhance the low-voltage ride-through (LVRT) performance of PV plants. However, the relay protection scheme of PV plants may encounter challenges posed by the current-limiting impedance of SFCLs. Utilizing a PSCAD/EMTDC software package model of a grid-connected PV plant with SFCLs, this study explores the impacts of SFCLs on zero-sequence overcurrent protection for PV plants. The findings of this study provide valuable insights serving as a technical guide for optimizing the synergy between SFCLs and relay protection mechanisms in PV plants.

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Impacts of Superconducting Fault Current Limiters on Zero-Sequence Overcurrent Protection for Grid-Connected Photovoltaic Plants

  • 会议论文

  • 发表日期：

    2025年

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  • Li Li,
  • Mingzhen Yang,
  • Qi Wu,
  • Chao Li

摘要

The Photovoltaic (PV) has been a key factor in driving the shift towards clean energy and promoting the expansion of sustainable energy. The integration of Superconducting Fault Current Limiters (SFCLs) in PV plants provides an effective way to limit fault currents and enhance the low-voltage ride-through (LVRT) performance of PV plants. However, the relay protection scheme of PV plants may encounter challenges posed by the current-limiting impedance of SFCLs. Utilizing a PSCAD/EMTDC software package model of a grid-connected PV plant with SFCLs, this study explores the impacts of SFCLs on zero-sequence overcurrent protection for PV plants. The findings of this study provide valuable insights serving as a technical guide for optimizing the synergy between SFCLs and relay protection mechanisms in PV plants.