描述
特高压电网的过电压问题与超高压电网相比有相似之处，但由于特高压系统线路输送容量大、距离可能更长，而自身的无功功率很大，每100公里的1000千伏线路无功功率可达530兆乏左右，使得在甩负荷时可能导致严重的暂时过电压;在正常运行负荷变化时将给无功调节、电压控制以及故障时单相重合闸潜供电流熄灭等造成一系列困难。同时高电压长空气绝缘的饱和、高海拔和电气设备制造等方面的因素，给过电压限制提出更高的要求。
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