科技创新与应用2024，Vol.14Issue(11)：76-80,5.DOI:10.19981/j.CN23-1581/G3.2024.11.018
氧化锌避雷器故障状态指示器试验方法研究
摘要
Abstract
Under the action of shock current,a large amount of current flows through zinc oxide valve in a short time,and the heating process of valve plate after absorbing impact energy can be regarded as approximately adiabatic temperature rise,so the mechanism of impact aging is mainly thermal aging.The impact aging will cause great damage to the valve disc,and multiple shocks will cause a cumulative effect on the valve disc aging.The data show that the power loss of the valve disc under DC 1mA voltage can be increased by 20%after the action of 4/10滋s waveform and 100 kA impulse current.It is found that the power loss of the ZnO valve disc with the nominal discharge current of 10 kA for line arrester is twice as much as the initial power loss after 18 times of 20 kA and 8/20s current shock.According to the power loss density analysis,it can be considered that the valve disc is close to its end of life.For the line arrester with gaps,it does not bear the power frequency voltage and there is no leakage current in normal operation,so it can record the number of large impulse current of the arrester,which is used to reflect the life span detection of the arrester,so that there will be an alarm indication when it reaches the set value.关键词
冲击热老化/累积效应/雷击次数/寿命监测/告警指示Key words
thermal impact aging/cumulative effect/lightning strike times/life span monitoring/alarm indication分类
信息技术与安全科学引用本文复制引用
董俊杰,徐健,梁悦薇,胡妍媛,熊勇..氧化锌避雷器故障状态指示器试验方法研究[J].科技创新与应用,2024,14(11):76-80,5.基金项目
佛山供电局职工创新项目(030600KZ23030029) （030600KZ23030029）
