关于500kV线路架空地线直流融冰试验保护跳闸的分析

严重的冰雪天气时刻危及着电网的安全稳定运行,采用直流融冰技术已成为应对低温冰冻等极端天气的一种重要手段,线路架空接地故障是常见的故障之一,分析一起超高压输电线路地线融冰不成功事件的原因,对直流融冰时的架空地线故障进行快速、准确的定位具有重要意义,确保了地线融冰成功率.本文通过500kV线路地线直流融冰过程的故障跳闸,结...

Analysis on DC Melting Ice Test Protection Trip of the Aerial Earth Wire of 500kV Line

Serious ice-snow weather imperils safe and stable operation of a power network at any moment.It is an important method to use DC melting technology to deal with extreme weather of low temperature freezing.Aerial earth faults of lines are one of common faults.Analyze the eause of unsuccessful incident of earth wire melting ice of UHV transmission lines,which has an important significance to quick speed and accurate rocating of the aerical earth wire fault of DC melting ice,ensuring success rate of the earth wire melting ice.The analyzes failwre trip,Combining oscillogram wave and protection trip action of protection principle through DC melting ice process of 500kV earth line.It can quickly define failure classes of the aerail earth wire in the course of DC melting ice,thus ensuring melting work on smoothly and reducing the influence of ice-snow damage on the power system.