Numerical Modeling of Space–Time Characteristics of Plasma Initialization in a Secondary Arc

Jinsong Li, Hua Yu, Min Jiang, Hong Liu and Guanliang Li
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Jinsong Li: Equipment State Analysis Center, State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
Hua Yu: Equipment State Analysis Center, State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
Min Jiang: Equipment State Analysis Center, State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
Hong Liu: Equipment State Analysis Center, State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China
Guanliang Li: Equipment State Analysis Center, State Grid Shanxi Electric Power Research Institute, Taiyuan 030001, China

Energies, 2019, vol. 12, issue 11, 1-16

Abstract: A numerical model based on the finite element simulation software COMSOL was developed to investigate the secondary arc that can limit the success of single-phase auto-reclosure solutions to the single-phase-to-ground fault. Partial differential equations accounting for variation of densities of charge particles (electrons, positive and negative ions) were coupled with Poisson’s equation to consider the effects of space and surface charges on the electric field. An experiment platform was established to verify the numerical model. The brightness distribution of the experimental short-circuit arc was basically consistent with the predicted distribution of electron density, demonstrating that the simulation was effective. Furthermore, the model was used to assess the particle density distribution, electric field variation, and time dependence of ion reactions during the short-circuit discharge. Results showed that the ion concentration was higher than the initial level after the short-circuit discharge, which is an important reason for inducing the subsequent secondary arc. The intensity of the spatial electric field was obviously affected by the high-voltage electrode at the end regions, and the intermediate region was mainly affected by the particle reaction. The time correspondence between the detachment reaction and the ion source generated in the short-circuit discharge process was basically consistent, and the detachment reactions were mainly concentrated in the middle area and near the negative electrode. The research elucidates the relevant plasma process of the secondary arc and will contribute to the suppression of it.

Keywords: secondary arc; short-circuit discharge; numerical modeling; plasma discharge (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: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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