Open AccessResearch on lightning surge overvoltage of convertor station with 500 kV hot‐standby circuit breakers
Author(s) -
Fan Youping,
Wu Lihui,
Qiu Huimin,
Wen Wu,
Liu Songkai,
Qian Hai,
Chen Dong
Publication year - 2015
Publication title -
iet science, measurement and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.418
H-Index - 49
eISSN - 1751-8830
pISSN - 1751-8822
DOI - 10.1049/iet-smt.2014.0243
Subject(s) - circuit breaker , lightning arrester , overvoltage , surge arrester , electrical engineering , arc flash , engineering , surge , recloser , emtp , sulfur hexafluoride circuit breaker , installation , fault (geology) , fuse (electrical) , arc fault circuit interrupter , voltage , short circuit , electric power system , power (physics) , mechanical engineering , physics , geology , quantum mechanics , seismology
This study introduces a circuit breaker flashover accident caused by lightning strokes in a row of Xingren convertor station in Guizhou. To find out the reason of the flashover and whether fault circuit breaker insulation coordination can meet requirements under multiple lightning strikes, the overvoltage condition of hot‐standby circuit breakers under lightning surge is calculated and checked by using EMTP and full‐scale high impulse voltage test of the fault circuit breaker is conducted for the first time. Owing to the hot‐standby state of the circuit breaker, the flashover accident is more likely to happen when lightning surge invades the substation or convertor station again. Measures to improve the hot‐standby circuit breakers’ lightning withstand level are proposed and by simulating analysis, the measure combined installing a line arrester at a tower of the inlet line and installing an arrester near a certain breaker on the line proves to be effective.