摘要
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,结合录波波形及保护原理对保护跳闸行为进行分析,能够快速定位直流融冰过程中架空地线的故障类型,保证融冰工作顺利进行,减轻冰雪灾害对电力系统的影响。
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.
作者
夏武
XIA Wu(Liuzhou Bureau of Southern Power Network UHV Transmission Company,Liuzhou 545006,China)
出处
《电气开关》
2022年第1期84-89,共6页
Electric Switchgear
关键词
架空地线
直流融冰
控制保护
故障分析
aerial earth wire
DC meltingice
control protection
analysis of failure
