摘要
配电变压器极易遭受雷击而损坏。分析了广西某地10 kV线路配电变压器遭受雷击损坏的原因,线路绝缘水平过高导致线路缺乏泄流通道是事故频繁的主要因素。通过ATP-EMTP仿真知,在配电变压器前2、3基杆塔安装过电压保护装置与避雷器配合使用,低压侧安装避雷器及降低接地装置的接地电阻等措施,可以有效降低配电变压器雷害事故的发生,提高变压器的防雷性能。
Distribution transformer is easily damaged by lightning stroke. The cause of the 10 kV line distribution transformer failure in Guangxi has been analyzed. The line insulation is too high which leads to the lack of current leakage, is the main factor of cause accidents frequently. The ATP-EMTP simulation program is applied to install overvoltage protection devices before 2, 3 tower of distribution transformer and use together with lightning arresters, install lightning arresters in low voltage side, reduce the grounding device resistance and other measures, which can effectively reduce the occur of damage accident on distribution transformer by lightning and improve its lightning protection performance.
出处
《电瓷避雷器》
CAS
北大核心
2011年第5期70-74,80,共6页
Insulators and Surge Arresters
关键词
变压器
防雷分析
过电压保护装置
保护措施
transformer
lightning protection analysis
overvoltage protection device
protective measures
