Equivalent Modeling of Disconnector Operation Based on Dynamic Arc Characteristics and VFTO Characteristic Analysis

Bin Liu (), Yong Liu, Junjun Xiong, Xiaopin Deng, Zhenyu Guo, Xueyou Zhang, Bingyu Mei and Zhenhua Li
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Bin Liu: China Electric Power Research Institute, Wuhan 430074, China
Yong Liu: China Electric Power Research Institute, Wuhan 430074, China
Junjun Xiong: China Electric Power Research Institute, Wuhan 430074, China
Xiaopin Deng: China Electric Power Research Institute, Wuhan 430074, China
Zhenyu Guo: State Grid Anhui Electric Power Co., Ltd., Super High Voltage Branch, Hefei 230000, China
Xueyou Zhang: State Grid Anhui Electric Power Co., Ltd., Super High Voltage Branch, Hefei 230000, China
Bingyu Mei: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China
Zhenhua Li: College of Electrical Engineering and New Energy, China Three Gorges University, Yichang 443000, China

Energies, 2025, vol. 18, issue 12, 1-20

Abstract: To thoroughly analyze the high-frequency and high-amplitude electromagnetic disturbances generated during disconnector operation, this paper proposes an equivalent modeling approach based on dynamic arc behavior. The model incorporates the resistance, inductance, and capacitance characteristics of the arc and consists of four main modules: arc reignition, arc extinction, arc resistance control, and switch control. Complete logical coordination among these modules is designed to enhance the model’s performance in terms of dynamic response and modeling accuracy compared to traditional methods. By systematically comparing simulation results with experimental data and conventional model outputs, the effectiveness and reliability of the proposed model in accurately reflecting the operational characteristics of disconnectors are validated. Furthermore, a comparative analysis of transient waveform characteristics from both experiment and simulation is conducted, with key parameters extracted and probability density functions constructed. The results demonstrate the high-precision fitting capability of the model and further reveal the statistical distribution patterns of very fast transient overvoltage single-pulse characteristics.

Keywords: disconnector; equivalent arc model; very fast transient overvoltage; electromagnetic interference; statistical distribution; transient characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2025
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