配电变压器防雷措施研究  

Study on the Lightning Protection Measures of Distribution Transformer

作　　者：王伟平[1] 刘源[1] 秦文韬[2] 刘玮[1] 彭利强[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,长沙410076 [2]河南濮阳供电公司,河南濮阳457000

出　　处：《电瓷避雷器》2011年第5期70-74,80,共6页Insulators and Surge Arresters

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.

关 键 词：变压器 防雷分析 过电压保护装置 保护措施 

分 类 号：TM862[电气工程—高电压与绝缘技术]