摘要
针对雷电波沿着输电线路侵入水电站,对电站GIS设备绝缘造成很大威胁的问题,分别建立了进线段的六级杆塔模型及对应架空线路模型,计算了不同坝顶门型构架冲击的接地电阻。并利用仿真软件ATPEMTP计算了不同电站运行方式、不同雷击点及不同门型构架模型时的雷电侵入波过电压。结果表明,在线路侧和主变侧分别配有一组避雷器时,电气设备最大雷电侵入波过电压符合绝缘裕度的要求,说明该水电站的防雷保护具有较高的可靠性。
Confronting the fact that lightning wave would intrude hydroelectric station along the transmission lines,thus it threats the insulation safety of GIS devices in power station. Six-stage tower models and corresponding overheadline models are respectively established, and different resistances of gantry framework are calculated. The intruding light-ning overvoltages in various conditions, such as different operation mode of hydroelectric station, different lightning strik-ing spots, different gantry framework, are calculated by using ATP-EMTP. The results show that the peak overvoltagemeets the demand of insulation redundancy when outgoing lines and transformers are configured with lightning arresters,and the lightning protection of this station can operate with high reliance.
出处
《水电能源科学》
北大核心
2014年第12期169-172,共4页
Water Resources and Power
关键词
雷电过电压
500kV
GIS水电站
运行方式
雷击点
坝顶门型构架
绝缘裕度
lightning overvoltage 500 kV GIS hydroelectric station
operation mode
lightning striking spot
gantryframework on top of dam
insulation redundancy
