Study on Structural Parameters and Analysis Method of Soil Successive Impulse Discharge Channel

Donghui Luo, Yongxing Cao, Yu Zhang, Shijun Xie, Chenmeng Zhang and Shuping Cao
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Donghui Luo: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Yongxing Cao: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Yu Zhang: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Shijun Xie: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Chenmeng Zhang: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China
Shuping Cao: State Grid Sichuan Electric Power Research Institute, Chengdu 610041, China

Energies, 2021, vol. 14, issue 4, 1-17

Abstract: The transient analysis model of grounding systems is an important tool to analyze the lightning characteristics of grounding devices. When lightning enters the soil through the grounding device, there is a centralized discharge channel. The spatial structure of the discharge channel in the soil has a great effect on the accuracy of the transient analysis model of the soil impulse discharge. In this paper, based on the gray information analysis method, the volume of successive impulse discharge channels in the ground under various currents and soil conditions is calculated, and the changing law with time interval is analyzed. According to the experimental results, an analysis method of the model considering the discharge channel structure is proposed, and an example is analyzed. The results show that the time interval has an effect on the volume of the discharge channel. In a certain range, the volume of the channel increases with the time interval of successive impulse discharges. Taking the critical breakdown electric field strength as the judgment condition and the residual resistivity as the variable, the development process of the discharge channel can be simulated. The calculated results of the model are close to the experimental results.

Keywords: grounding; discharge channel; X-ray; successive impulse; gray information; transient analysis model (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: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

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