Suzhou Electric Appliance Research Institute
期刊号: CN32-1800/TM| ISSN1007-3175

Article retrieval

文章检索

首页 >> 文章检索 >> 往年索引

一起500 kV避雷器内部受潮故障特征与诊断分析

来源:电工电气发布时间:2022-05-28 09:28 浏览次数:358

一起500 kV避雷器内部受潮故障特征与诊断分析

刘昌标,张翾喆,谢斯晗,丁凯,王志
(国网浙江省电力有限公司超高压分公司,浙江 杭州 311199)
 
    摘 要:金属氧化物避雷器是电力系统中重要的防雷和过电压保护设备,开展带电检测可有效地保证避雷器安全稳定运行。介绍了一起新投运的 500 kV 金属氧化锌避雷器数据异常的典型案例,通过在线监测、带电检测、停电诊断性试验确认了避雷器内部存在严重故障,经解体检查发现,避雷器上节顶部主盖板橡胶密封圈安装质量不佳致使避雷器内部发生严重积水受潮是避雷器内部故障的直接原因。指出针对新投运设备建议加强监控力度,以便及时有效地发现潜在缺陷,避免设备发生爆炸等严重安全事故。
    关键词:避雷器;带电检测;受潮;内部故障
    中图分类号:TM862     文献标识码:B     文章编号:1007-3175(2022)05-0045-04
 
The Internal Damp Fault Characteristics and Diagnosis
Analysis of a 500 kV Lightning Arrester
 
LIU Chang-biao, ZHANG Xuan-zhe, XIE Si-han, DING Kai, WANG Zhi
(EHV Branch Company of State Grid Zhejiang Electric Power Company, Hangzhou 311199, China)
 
    Abstract: MOA is a piece of crucial equipment for lightning protection and overvoltage protection in power systems, and carrying out live detection could effectively ensure the safe and stable operation of the arrester.This paper introduced a typical case of abnormal data of a 500 kV metal zinc oxide arrester which was put into operation newly. It has been confirmed that there was a severe fault inside the arrester through online monitoring, live detection, and power failure diagnostic tests.After disintegration inspection, it was found that the poor installation quality of the rubber sealing ring of the main cover on the top of the upper section of the arrester caused serious water accumulation inside the arrester, and dampness is the direct cause of the internal failure of the arrester.This paper points out that it is necessary to strengthen the monitoring of the new equipment to detect potential defects in time and avoid serious safety accidents such as
equipment explosions, etc.
    Key words: lightning arrester; live detection; damp; internal fault
 
参考文献
[1] 范敏, 谢佳, 姜方财, 等. 基于带电检测技术的金属氧化物避雷器缺陷分析[J] . 电瓷避雷器,2017(2) :64-68.
[2] 朱海貌,黄锐,夏晓波,等. 金属氧化物避雷器带电检测数据异常的诊断及分析[J] . 电瓷避雷器,2012(2) :68-71.
[3] 唐梦颖,袁超,徐伟,等. 一起 220 kV 避雷器爆炸故障分析与防范措施[J] . 电工电气,2017(2) :36-38.
[4] 林坚, 陈长杰, 孙锦, 等. 金属氧化物避雷器带电检测及其故障诊断与分析[J] . 电瓷避雷器,2015(1) :144-147.
[5] 何萍,朱颖,宴年平,等. 一起金属氧化物避雷器带电检测数据异常的处理及防范[J] . 江西电力,2014(4) :66-69.
[6] 秦家远,刘赟,何智强. 一起 220 kV 避雷器内部受潮缺陷诊断分析[J]. 江西电力,2016(10) :36-38.
[7] 高峰,郭洁,徐欣,等. 交流金属氧化物避雷器受潮与阻性电流的关系[J] . 高电压技术,2009,35(11) :2629-2633.
[8] 魏绍东, 邓维, 雷红才, 等.500 kV 避雷器故障模拟及缺陷检测试验研究[J] . 电瓷避雷器,2019(2) :109-114.
[9] 刘佳鑫,唐佳能,马一菱,等.500 kV 金属氧化物避雷器安装缺陷的试验及分析[J] . 电瓷避雷器,2019(2) :79-83.