配电网避雷器运行故障原因分析及建议

Analysis and Strategy of Operation Faults of Lightning Arresters in Distribution Networks

着重研究了氧化锌避雷器故障类型及原因。避雷器雷电冲击耐受寿命与其内部氧化锌电阻片的参数性能和整体制作工艺密切相关,避雷器整体密封性不良受潮,氧化锌电阻片额定电压过低,承受的较大暂时过电能量过载,避雷器整体耐受雷电冲击能力较差都是造成入网避雷器抗雷击能力和应对外部受潮和系统过电压等外界因素抵抗力不足,频发故障的原因。

In this paper,the fault types and causes of zinc oxide arrester are studied.The lightning shock tolerance life of lightning arrester is closely related to the parameter performance of metal oxide varistor and arrester overall fabrication technology.The poor overall sealing of the lightning arrester due to dampness,the low rated voltage of the zinc oxide resistor,the large temporary overcurrent,and the poor overall lightning shock resistance of the lightning arrester,are all reasons for the lack of resistance to lightning shock and external factors such as moisture and system overvoltage,which lead to frequent faults.