摘要
葛洲坝换流站连续两次在雷雨天气中发生直流滤波器中电流互感器损坏事故。文章综述了对损坏设备的分解，过电压计算及分析，并提出了在１２／３６ 次谐波滤波器处改用２２０ｋＶ 电流互感器，在１２／２４ 次谐波滤波器处加２２０ｋＶ 电压等级避雷器作相应保护的对策。
In thunderstorm two of the current transformers in Gezhouba converter station were damaged one after another. The disassembly, inspection, overvoltage calculation and analysis of the damaged CTs are summarized. It is put forward that in the place where the 12/36th harmonic filters are installed the filters should be replaced by 220kV CTs, and in the place where the 12/24th harmonic filters are installed the 220kV lightning arresters should be added. The operational experience shows that the above mentioned protective countermeasures are successful.
出处
《电网技术》
EI
CSCD
北大核心
1999年第11期67-70,共4页
Power System Technology
