摘要
依据向家坝—上海特高压直流输电示范工程实际设备参数建立了仿真分析模型,研究了换流站高压端换流阀顶端接地故障引起操作过电压的机理及分布规律,并分析了增加E1H型避雷器并联柱数和提高中性母线绝缘水平两种方案对过电压的抑制效果,对后续特高压直流输电工程避雷器优化配置有一定的指导意义。
A system simulation model is built with the parameters from the Xiangjiaba-Shanghai UHVDC transmission pilot project. The switching overvoltage generation mechanism and its distribution induced by grounding fault at the top of high-voltage thyristor valve are analyzed with the model. Moreover, two overvoltage suppressing methods, adding more E1H type arresters in parallel and increasing the insulation level at neutral line, and the suppressing results are also analyzed which may be of reference to the optimization layout of arresters for future UHVDC projects.
出处
《高压电器》
CAS
CSCD
北大核心
2014年第8期104-109,114,共7页
High Voltage Apparatus
关键词
换流阀
接地故障
过电压
仿真
thyristor valve
grounding fault
overvoltage
simulation
