1000kV交流输电系统串补站的雷电侵入波保护

Protection of Series Compensation Station Against Lightning Intruded Wave in 1000 kV AC Transmission System

1000kV交流输电系统特高压串补站的雷电侵入波保护是串补装置在特高压系统中应用必须解决的问题。为此,重点针对串补站耐雷性能开展计算分析,初步选择了串补站的主接线,确定了相关设备参数;建立了串补站在不同安装位置以及运行状态下的雷电侵入波计算模型;采用区间组合法计算串补站设备的雷击故障概率;对设置进线保护段和在站内布置避雷器两种措施的保护效果进行评估,提出了特高压串补站的雷电侵入波保护方案。计算结果可为确定串补装置的绝缘水平和防雷保护方案提供参考。

The protection of 1000 kV ultra high voltage（UHV） series compensation（SC） station is a problem which must be solved to apply SC in UHV AC transmission system.Focusing on the calculation and analysis of lightning withstand capability of SC station,we firstly selected the main connection of SC banks,and determined the parameters of relevant equipment.Then,we established simulation models separately on diverse locations for SC installation and under different operation conditions.Moreover,lightning fault probability of SC station was studied by the interval combination method,and the performances between protective schemes of Lead-in Line Protection Section and MOAs in station were evaluated.Furthermore,a reasonable solution was proposed for the protective scheme of lightning intruded wave in UHV SC station.The calculated results can provide a reference for confirming insulation level of SC Banks,as well as protecting measures of lightning surge.