摘要
特高压紧凑型输电线路杆塔高、尺寸大,给线路带电检修工作的安全开展造成一定困难。为此,介绍了超/特高压输电线路直线塔几种常用的等电位进入方式,并针对塔窗内进入路径的安全性开展1:1模拟试验,获得带电作业组合间隙放电特性。分析试验结果,推荐直线塔采用侧方水平进入方式,其最小组合间隙为7.0 m;耐张塔采用"跨二短三"方式沿耐张串进入等电位,最小组合间隙为6.6 m。研究表明:选择合适的进入方式及配套工具可安全地在特高压紧凑型线路上开展等电位带电作业,带电作业组合间隙不为线路塔窗设计的控制因素。
We introduced several general methods of entering potential working on tangent tower of EHV/UHV transmission line, tested the safety of access into the tower windows at 1：1 ratio scale simulated tower, and deter~ mined the discharge characteristics of live working complex gap. Analyzing the test results, we recommended the entering method for tangent tower from the side of tower and parallel to the line. Its minimum complex gap is 7.0 m. Meanwhile, the method of striding no more than two insulators along the tension string is adopted to enter po- tential working on strain tower. Its minimum complex gap is 6.6 m. Results show that selecting the appropriate mode of entry and supporting tools is important to carry out live work safely on UHV compact transmission lines. And, the complex gap of live working does not become the control factor of tower window design.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2011年第8期1868-1874,共7页
High Voltage Engineering
基金
国际科技合作项目(2008DFR60010)~~
关键词
特高压(UHV)
紧凑型输电线路
带电作业
作业方式
组合间隙
等电位作业
放电特性
ultra high voltage（UHV）
compact transmission line
live working
working method
complex gap
po-tential working
discharge characteristics
