电缆终端头绝缘缺陷对干式高压计量装置的影响分析及预防措施
Analysis of Influence of Insulation Fault of Cable Terminal on 10 kV Outdoor Dry-type High-Voltage Metering Device
周宁 1斯荣 1王纪东 1黄乔林 1李响军1
作者信息
- 1. 深圳供电局有限公司,广东 深圳 518000
- 折叠
摘要
针对一起新装 10kV户外干式高压计量装置运行不到 10 min的爆炸事故,从计量装置后端设备类型入手,结合电缆试验数据,由表及里地剖析造成计量装置爆炸的根本原因.确定原因是后端电缆热缩终端头放电致电压互感器发生谐振,最终失控爆炸.描述了故障发生前后的表象及现场值班员对事故处理的情况,并根据引起故障的原因提出一些装置改进建议.
Abstract
This paper reports an explosion accident which happened in 10 minutes after the installation of a 10 kV outdoor dry-type high-voltage metering device.By combining different types of back-end equipment of the metering device with cable test data,and analysis from appearance to essence,it determines the cause of the explosion as back-end heat shrinkage-induced terminal charging which leads to resonance of voltage transformer and ultimately to explosion.It also outlines the handling of the accident by on-site attendant,and proposes some suggestions of countermeasures.
关键词
10/kV户外干式高压计量装置/爆炸/电压互感器/局部放电/串联谐振Key words
10 kV outdoor dry-type high-voltage metering device/explosion/voltage transformer/partial discharge/series resonance引用本文复制引用
出版年
2024
NETL
NSTL
万方数据