Study on the breakdown characteristics of multiple-reignition secondary arcs on EHV/UHV transmission lines

Runchang Li, Hongshun Liu, Xiaoxuan Lou, Ping Song, Weihong Hou, Shiqiang Dai, Yuchao Shi, Gongyu Jin, Wah Hoon Siew, Qingmin Li

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)
21 Downloads (Pure)

Abstract

A long-gap AC arc with a length of more than ten meters (secondary arc) are normally generated at the short-circuit arc channel after a single-phase-to-ground fault. In previous studies, arc breakdowns of secondary arcs have mainly been considered as electrical breakdowns, ignoring the role of heat in the arc channel. Besides, the extinction-reignition theory of secondary arc, i.e., dielectric strength recovery theory, still lack the support of experimental data. In this study, based on the equivalent experiments performed in the laboratory, the influences of compensation degree of transmission lines, initial recovery voltage gradient of air gap, test current, wind speed, and wind direction on the breakdown characteristics of secondary arcs are studied and statistically analyzed. The laws of the transient recovery voltage (TRV) and of the rate of rise of recovery voltage (RRRV) also studied by considering the influencing factors mentioned above. The results of this study will provide a more complete experimental basis for the theory of extinction–reignition of secondary arcs and a deeper understanding of the transient characteristics of arc breakdown
Original languageEnglish
Pages (from-to)1164-1172
Number of pages13
JournalIEEE Transactions on Plasma Science
Volume51
Issue number4
Early online date14 Mar 2023
DOIs
Publication statusPublished - 25 Apr 2023

Keywords

  • secondary arc
  • extinction theory
  • arc breakdown
  • multiple reignition
  • single-phase-to-ground fault

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