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This paper addresses an issue of electrical grounding under arc fault in a residential building. The potential caused by arc faults may cause harm to the human body. In an actual electrical system, the grounding situation are generally complicated. The electric potential transferred from one grounding grid to another adjacent independent grid may possibly happen. This transfer potential will result in a local high voltage and cause the threat to the safety of both equipment and people. The Partial-element-equivalent-circuit (PEEC) method is available and convenient for the electromagnetic transient analysis and electromagnetic-compatibility (EMC) problem. In this paper, the adjacent independent grounding grids are modeled with the PEEC method. By using the dyadic Green’s function and low frequency approximation, the influence of soil is replaced with a series of quasi-static image sources. The ground impedance and transfer voltage of adjacent grounding grids are then investigated under 50 Hz AC voltage source. The influence of soil conductivity, distance and the configuration of grounding system on the behavior of independent grounding electrodes are further discussed. Besides the 50 Hz AC voltage source, the transfer voltage under lightning current source is also investgated.

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The Modeling of Transfer Potential Between Independent Grounding Grids Under Arc Faults in Low Voltage Distribution Grids

  • 会议论文

  • 发表日期：

    2026年

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  • Yubo Zhang,
  • Xiaojia Sun,
  • Mei Huang,
  • Kun Tan,
  • Zhe Li,
  • Zuowei Chen,
  • Zhanhua Huang,
  • Bo Geng

摘要

This paper addresses an issue of electrical grounding under arc fault in a residential building. The potential caused by arc faults may cause harm to the human body. In an actual electrical system, the grounding situation are generally complicated. The electric potential transferred from one grounding grid to another adjacent independent grid may possibly happen. This transfer potential will result in a local high voltage and cause the threat to the safety of both equipment and people. The Partial-element-equivalent-circuit (PEEC) method is available and convenient for the electromagnetic transient analysis and electromagnetic-compatibility (EMC) problem. In this paper, the adjacent independent grounding grids are modeled with the PEEC method. By using the dyadic Green’s function and low frequency approximation, the influence of soil is replaced with a series of quasi-static image sources. The ground impedance and transfer voltage of adjacent grounding grids are then investigated under 50 Hz AC voltage source. The influence of soil conductivity, distance and the configuration of grounding system on the behavior of independent grounding electrodes are further discussed. Besides the 50 Hz AC voltage source, the transfer voltage under lightning current source is also investgated.