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Cross-bonding is used to reduce the induced voltage and sheath circulating current in HV cables. Typically, the changes of specific circuit parameters will impact the magnitude of sheath circulating current. By using Carson-Clem theory and ATP-EMTP, the sheath circulating current of HV cables under normal operation conditions is simulated and investigated. Initially, the composition of the sheath circulating current was elucidated through theoretical analysis. Subsequently, the variations of sheath circulating current were examined by comparing to State Grid Corporation standards, in which grounding resistance, cable distance, load current, cable segment length, and power factor are concerned, the result is shown the complexity of changes in sheath circulating current and obvious limitations of the State Grid Corporation standards.

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Study on Sheath Circulating Current in Single Cables Under Complex Operation Conditions

  • 会议论文

  • 发表日期：

    2025年

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  • Jintao Ning,
  • Chun Liu,
  • Zhuoming Feng,
  • Weizhong Liu

摘要

Cross-bonding is used to reduce the induced voltage and sheath circulating current in HV cables. Typically, the changes of specific circuit parameters will impact the magnitude of sheath circulating current. By using Carson-Clem theory and ATP-EMTP, the sheath circulating current of HV cables under normal operation conditions is simulated and investigated. Initially, the composition of the sheath circulating current was elucidated through theoretical analysis. Subsequently, the variations of sheath circulating current were examined by comparing to State Grid Corporation standards, in which grounding resistance, cable distance, load current, cable segment length, and power factor are concerned, the result is shown the complexity of changes in sheath circulating current and obvious limitations of the State Grid Corporation standards.