Modeling and Simulation of a Transient Process and an Analysis of Transient Characteristics in the Switching Operation of Disconnectors

Yue Tong (), Qi Wang, Yuqing Wang and Xiang Liu
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Yue Tong: China Electric Power Research Institute, Wuhan 430074, China
Qi Wang: China Electric Power Research Institute, Wuhan 430074, China
Yuqing Wang: China Electric Power Research Institute, Wuhan 430074, China
Xiang Liu: China Electric Power Research Institute, Wuhan 430074, China

Sustainability, 2023, vol. 15, issue 8, 1-11

Abstract: High-voltage switchgears can generate high-frequency and high-amplitude electromagnetic interference during their operation, which may lead to abnormal outputs of the measurement devices, thus giving rise to measurement errors or protective relay malfunctions and impacts on the stable running of the power grid. Considering the air breakdown delay, a dynamic reignition model consisting of the hyperbolic model, the static model and the improved Mayr model is proposed to analyze the transient process during the on/off operation of open-type disconnectors. Meanwhile, the influence of arc resistance, line length and breakdown delay on the model were analyzed, and an experimental circuit was built to verify the simulation results through a comparison. It was found that the proposed model could reflect the high-frequency voltage and current during the on/off operation more accurately and thus provide an effective method for the precise modeling of the switching operation of the disconnector.

Keywords: arc model; disconnector; dynamic reignition model; high frequency (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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