高海拔330 kV输电线路悬垂串金具电晕特性研究  

Corona Characteristic Research of Suspension String Fittings for High Altitude 330 kV Transmission Line

作　　者：鄂士平[1] 曹晶[2] 全姗姗[2] 梁进祥[2] 彭宗仁[3] 

机构地区：[1]国网湖北省电力公司,湖北武汉430077 [2]中国电力科学研究院,湖北武汉430074 [3]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《水电能源科学》2017年第5期179-181,共3页Water Resources and Power

基　　金：国家电网公司科技项目(SG10061)

摘　　要：我国西北部分高海拔地区330kV同塔双回输电线路悬垂串金具运行中存在明显放电现象,为降低电能损耗,采用三维有限元分析计算软件对实际同塔双回线路进行建模研究,并对悬垂串金具表面电场分布进行仿真计算。根据计算结果,在特高压交流试验基地环境气候实验室和特高压户外试验场对优化前后悬垂串金具开展可见电晕试验研究。结果表明,悬垂串金具安装防晕球后,金具表面最高场强从28.3kV/cm降至22.4kV/cm,降幅为20.8%,同时金具电晕放电起始电压与熄灭电压比优化前分别提高12.6%和5.6%。随着海拔高度上升,金具电晕放电电压下降,4 300 m海拔下起始电压与熄灭电压分别比0 m处下降31.0%、31.1%,可为高海拔线路金具设计与优化提供参考。In some high altitude northwest area of China,corona discharge phenomenon of fittings is obvious for suspension ring of 330 kV double-circuit transmission line.In order to reduce power loss,three-dimensional finite element analysis method was used to model double-loop transmission line in the same tower and calculate surface electric field distribution of suspension string.According to calculation result,corona discharge research work is performed both at climate laboratory in Ultra-high Voltage AC Test Base and Ultra-high Voltage AC Test Field.It indicates that the intensity of fittings is decreased by nearly 20.8%to 22.4kV/cm from 28.3kV/cm by installation of anti-corona ball,and the inception and extinction voltage after optimization is respectively 12.6%,5.6% higher than before.Corona discharge voltage decreases with the rise of altitude above the sea level,and discharge voltage at 4 300 mis approximately 31.00%,31.1%lower than 0m.Thus,it can be taken as a reference during the design and optimization for transmission project at high altitude area.

关 键 词：高海拔 输电线路 悬垂串 有限元计算 电晕特性 

分 类 号：TM75[电气工程—电力系统及自动化]