500kV氧化锌避雷器典型故障分析诊断
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摘要
氧化锌避雷器是保护电气设备免受雷击时高瞬态过电压危害,并限制续流时间,也常限制续流赋值的一种保护设备,在电力系统中的应用十分广泛。此文通过500 kV变电站2号主变故障跳闸分析,阐述了氧化锌避雷器在运行中出现内部积水、无法承受相应的电压导致内部绝缘击穿,造成运行中避雷器的损坏而发生故障的典型案例,提出故障的分析办法和解决的相应措施。
Zinc oxide arrester is a kind of protective equipment to protect electrical equipment from high transient overvoltage hazards when lightning strikes,and to limit the flow current time,and also to limit the flow current assignment.It is widely used in power system.Based on the fault tripping analysis of No.2 main transformer in a 500 kV substation,this paper expounds the typical case of the internal insulation breakdown caused by internal water accumulation and the failure of withstanding corresponding voltage in operation of zinc oxide arrester,resulting in the damage of the arrester in operation,and puts forward the fault analysis method and corresponding measures for solution.
Zinc oxide arrester is a kind of protective equipment to protect electrical equipment from high transient overvoltage hazards when lightning strikes,and to limit the flow current time,and also to limit the flow current assignment.It is widely used in power system.Based on the fault tripping analysis of No.2 main transformer in a 500 kV substation,this paper expounds the typical case of the internal insulation breakdown caused by internal water accumulation and the failure of withstanding corresponding voltage in operation of zinc oxide arrester,resulting in the damage of the arrester in operation,and puts forward the fault analysis method and corresponding measures for solution.
引文
[1]涂晓彬.氧化锌避雷器现状及存在问题分析[J].广东电力,2006(9):14.
[2]龚炳林,黄龙林,刘银河.浅析盐化企业雷电危害与防范对策[J].盐业与化工,2012(9):45-48.
[2]龚炳林,黄龙林,刘银河.浅析盐化企业雷电危害与防范对策[J].盐业与化工,2012(9):45-48.