110 kV氧化锌避雷器故障爆炸的原因分析及防范措施  

Cause Analysis and Prevention Measures of 110 kV Zinc Oxide Arrester Failure Explosion

作　　者：蒲朝朗 郭绍平 PU Chaolang;GUO Shaoping(Jiangue County Power Supply Branch of State Grid Sichuan Electric Power Company,Jiange,Sichuan 628300,China)

机构地区：[1]国网四川省电力公司剑阁县供电分公司,四川剑阁628300

出　　处：《自动化应用》2023年第24期128-131,共4页Automation Application

摘　　要：本文针对一起110 kV输电线路避雷器运行突发爆炸事故,通过对同批次同型号设备进行红外测温、带电检测、停电检测获取的试验数据以及解体检测分析,最终查明该事故发生原因为产品生产工艺偏差,导致潮气在生产组装过程中进入避雷器内部,使氧化锌芯组受潮,运行过程中表面绝缘电阻下降短接部分电阻片,其余部分电阻片荷电率升高,加速了电阻片材料的劣化,最终在一次雷击过程中无法承受过电压而发生爆炸。针对爆炸发生原因,本文提出了相应的改进措施。This paper focuses on a sudden explosion accident of a 110 kV transmission line lightning arrester during operation.Through infrared temperature measurement,live detection,power outage detection of the same batch and model of equipment,as well as disassembly detection analysis,it is ultimately determined that the cause of the accident is a deviation in the product production process,which caused moisture to enter the interior of the lightning arrester during the production and assembly process,causing moisture to the zinc oxide core group.During operation,the surface insulation resistance decreases and some of the resistance pieces are short circuited,while the charge rate of the remaining resistance pieces increases,accelerating the deterioration of the resistance piece material.Eventually,an explosion occurs due to the inability to withstand overvoltage during a lightning strike.Corresponding improvement measures have been proposed for the cause of the explosion.

关 键 词：氧化锌避雷器 避雷器故障 直流试验 

分 类 号：TM862[电气工程—高电压与绝缘技术]