摘要
介绍广东地区变电站未安装出线避雷器前雷电侵入波事故概况,明确了必须加强出线断路器重合闸期间的侵入波保护,即应安装出线断路器前置避雷器。利用实时数字仿真器(real-time digital simulator,RTDS)分析变电站出线断路器开断期间雷电侵入波过电压,并对加强线路绝缘的影响以及出线避雷器的保护效果进行评估。计算结果表明:变电站装设出线避雷器后,即使大幅提高输电线路绝缘水平,也不会在出线断路器产生危险的雷电侵入波过电压,能有效地改善变电站防雷运行工况。
General situation of substation outlet circuit breaker faults caused by lightning surge intrusion occurred in Guangdong region before the installation of outlet arrester is described, and it is clarified that the lightning surge intrusion protection for outlet circuit breakers during its reclosure must be reinforced, i.e., outlet arresters must be installed in front of outlet circuit breakers. Utilizing real-time＂ digital simulator （RTDS）, the overvoltage caused by lightning surge intrusion during the reclosure of outlet circuit breaker is simulated, and the effect of enhancing insulation level of transmission line and the protection result of adding outlet arresters are evaluated as well. Simulation results show that after outlet arrester is installed, although the insulation level of transmission line is strengthened considerably, dangerous lightning surge intrusion will not appear on outlet circuit breaker, thus the operating condition of lightning protection for substation can be effectively improved.
出处
《电网技术》
EI
CSCD
北大核心
2012年第6期42-46,共5页
Power System Technology
关键词
雷电侵入波
出线断路器
出线避雷器
绝缘配合
实时数字仿真器
lightning surge intrusion
outlet circuitbreaker
outlet arrester
insulation coordination
real-timedigital simulator （RTDS）
