摘要
采用三相-护层(外壳)-大地模型研究了110kV长电缆-GIS系统的侵入波过电压及绝缘配合。结果表明,对芯导体、护层(外壳)及大地之间联系紧密的长电缆-GIS系统,其耦合作用和大地影响不可忽视;电缆、GIS及主变的过电压水平随电缆长度增加而降低;过电压保护的关键在于限制电缆首端的过电压,电缆末端和GIS不需加装避雷器;可作为工程设计和制修订有关标准的参考依据。
Using the three phases-sheath (enclosure)-earth model, the incoming lightning overvoltages and insulation coordination in 110kV long cable-GIS systems are studied. The results show that the coupling effects and influence of earth can not be ignored; the longer length of cable, the lower overvoltage level in cable and GIS; it is crucial to limit the overvoltage of cable entrance, and the arresters installed at cable terminal and GIS are unnecessary. It can be regarded as reference for project design and revising the concerned standards.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
1992年第2期14-18,共5页
High Voltage Engineering
关键词
长电缆
OIS
侵入波过电压
incoming lightning overvoltage insulation coordination long cable GIS
