500 kV紧凑型同塔双回输电线路带电作业进入等电位方法  

Entering the Equipotential Method for Live Working of 500 kV Compact Double Circuit Transmission Line

作　　者：唐波[1] 吴玮华[1] 刘任[1] 黄力[1] TANG Bo;WU Weihua;LIU Ren;HUANG Li(Electric Engineering and Renewable Energy School, China Three Gorges University, Hubei Yichang 443002, Chin)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443002

出　　处：《高压电器》2018年第4期113-119,共7页High Voltage Apparatus

基　　金：国家自然科学基金资助项目(51307098);中国电力科学研究院实验室开放基金资助项目(XT83-15-001)~~

摘　　要：500 kV紧凑型同塔双回输电线路由于三相导线间距和塔头间隙紧凑型布置,导致带电作业人员进入等电位较常规线路难度较大。基于现有500 kV线路进入等电位技术,提出了几种可行的500 kV紧凑型同塔双回输电线路进电位方案,并对各方案等电位作业人员的组合间隙进行了计算,从而分析认为攀爬软梯法为最优方案。采用场域分解的方法将三维无界场域分解成有界子区域,利用Ansoft软件计算了进电位过程不同位置的人体表面场强,获取了等电位作业人员身体表面场强的分布特点和变化规律。仿真计算结果及渔兴一二回线工程应用表明,攀爬软梯法进入等电位过程中,作业人员穿戴屏蔽效率为60 dB的带电作业屏蔽服可满足安全要求。500 kV compact double circuit transmission line with three-phase wire spacing and clearance of tower head compact layout, which lead to the charged worker enter the equipotential is more difficult than common line. Based on the existing 500 kV line technology of entering the equipotential, puts forward several feasible solutions for entering the equipotential of 500 kV compact double circuit transmission line, and the combination of the equipoten- tial homework personnel to various schemes gap are calculated, thus climbing ladder method is the optimal solution. With the method of field domain decomposition, three dimensional unbounded field region will be broken down into bounded sequence, the field strength distribution characteristics and change rules of equipotential workers body sur- face is obtained by using Ansoft software to calculate into the field strength at different positions of the body surface when entering the equipotential. Simulation calculation results and the application of Yuxing one loop engineering show that： when climbing ladder into equipotential, the screen clothes with a shielding efficiency no less than 60 dB meet safety requirements.

关 键 词：500 kV紧凑型同塔双回线路 带电作业 进入等电位 组合间隙 人体表面场强 

分 类 号：TM75[电气工程—电力系统及自动化]