±800kV浙西换流站直流场雷电侵入波过电压研究  

Lightning Intruding Overvoltage for DC Field of ±800 kV Zhexi Converter Station

作　　者：钱锋[1] 周志超[1] 沈志恒[2] 丁健[1] 沈扬[1] 陈锡磊[2] 周浩[2] 

机构地区：[1]浙江省电力设计院,杭州310014 [2]浙江大学电气工程学院,杭州310027

出　　处：《华东电力》2012年第4期621-625,共5页East China Electric Power

摘　　要：雷电侵入直流换流站对系统的安全运行有重要影响。对溪洛渡—浙西±800 kV直流输电工程的浙西换流站直流侧的雷电侵入波进行了详细仿真计算分析,结果表明:计算设备最大对地电压时,选择直流负极设备进行,计算设备两端最大电压时,选择直流正极设备进行;特高压直流换流站进行绕击侵入波计算时宜取20 kA的负极性雷电流作为雷电流幅值;直流极母线雷电过电压计算采用单极大地回路运行方式,换流站直流场各设备过电压均未超过规定值;直流中性母线雷电过电压选择金属回线运行方式,直流场各设备对地电压、平波电抗器两端以及隔离开关断口电压都没有超过安全运行电压,不会对换流站直流场的运行造成危害。The lightning invasion in DC converter station may endanger the safe operation of HVDC system.Based on the ±800 kV UHVDC power transmission project from Xiluodu to Zhexi,the lightning intruding overvoltage for the DC field of Zhexi converter station is simulated and analyzed.Evidently,equipment of negative DC voltage is preferred when calculating equipment′s max voltage to ground,while equipment of positive DC voltage is preferred when calculating max voltage between two terminals of equipment;20 kA negative lightning current is proper to be selected as the lightning amplitude for the calculation of lightning shielding wave in UHVDC converter station;for DC bus overvoltage calculation,the monopolar ground return mode is applicable,and none of the overvoltage levels of the equipments in the converter station exceeds the required level;for DC neutral bus lightning overvoltage calculation,the monopolar metallic return mode can be selected,and the overvoltage levels of the equipments in DC field,terminals of reactor and isolating switch are within the safe operating voltage level,harmless to the operation of converter station.

关 键 词：特高压直流输电 浙西换流站 直流场 雷电侵入波 运行方式 

分 类 号：TM863[电气工程—高电压与绝缘技术]