Research portfolio and prospect on physical characteristics and modelling methods of secondary arcs related to high-voltage power transmission lines

Cong, Hua; Du, Shiyue; Xiang, Sheng; Li, Qingmin

doi:10.3233/jae-170041

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…Therefore, the timely extinction of the secondary arc caused by the single-phase ground fault is important for the success of single-phase reclosing. To ensure the safe operation of the power transmission lines and enhance the stability of the power system, a method that enables the self-extinction of the secondary arc is urgently needed to be found [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…here, the subscripts e, p, and n indicate electrons and positive and negative ions, respectively; N is the density, in m −3 ; D is the diffusion coefficient, in m 2 /s; f is the net rate of the generation and loss processes, in m −3 s −1 ; and t represents time, in s. The main processes usually considered in Equations (1) and (3) are represented by their rates: Electron impact ionization, f ion = αN e µ e E; attachment of electrons to electronegative molecules (CO 2 , H 2 O, O 2 , etc.) present in air, f att = ηN e µ e E; detachment of electrons from negative ions, f det = k det N e N n ; electron-ion recombination, f ep = β ep N e N p ; recombination of positive and negative ions, f pn = β pn N p N n ; and natural background ionization, f 0 .…”

Section: Introductionmentioning

confidence: 99%

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

Huang

Jiang

et al. 2019

Energies

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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.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%