高海拔500 kV交流线路空气间隙及海拔修正试验研究  

Research on Air Gap Selection and Altitude Correction of 500 kV AC Transmission Lines in High Altitude Areas

作　　者：罗琦 王强 李力 丁玉剑[2] 艾鹏 Luo Qi;Wang Qiang;Li Li;Ding Yujian;Ai Peng(Southwest Electric Power Design Institute Co.,Ltd.,Chengdu 610021,Sichuan,China;China Electric Power Research Institute,Beijing 100192,China)

机构地区：[1]西南电力设计院有限公司,四川成都610021 [2]中国电力科学研究院,北京100192

出　　处：《四川电力技术》2018年第3期17-24,共8页Sichuan Electric Power Technology

摘　　要：介绍了在海拔4300 m地区对500 kV直线塔模拟塔头导线-塔身空气间隙的操作冲击放电、雷电冲击放电和工频放电特性试验研究,实验得到了塔头空气间隙不同电压的放电特性曲线。根据海拔0 m和海拔4300 m地区的500 kV塔头间隙的试验结果,采用插值法,计算得到了不同海拔地区的塔头空气间隙的放电电压,同时得到了海拔4000~5500 m地区塔头间隙冲击放电电压的海拔校正系数,推荐了适用的海拔校正方法。最后,给出了海拔4000 m以上500 kV输电线路所需的最小空气间隙距离值。In the region with the altitude of 4300 m, the researches on the characteristic tests of switching impulse discharge, lightning impulse discharge and power frequency discharge of line - tower air gaps are earned out on the simulation tower head of 500 kV tangent tower, and the discharge characteristics curves under different voltages are obtained. Based on the experimental data of tower head air gaps at altitude of 0 m and 4300 m, the discharge voltages of tower head air gap at the different altitudes are obtained, and the altitude correction coefficients for discharge voltages of tower head air gap at altitude of 4000 5000 m are also obtained through interpoolation method. Finally, the mininmnl air gap required by 500 kV transnfission lines at altitude of 4000 m and above is given and the applicable altitude emTeetion method is recommended.

关 键 词：高海拔 500 KV 空气间隙 海拔校正 操作冲击 雷电冲击 工频放电 

分 类 号：TM852[电气工程—高电压与绝缘技术]