特高压交流铝管式刚性跳线电场计算和分析  

Electric Field Calculation and Analysis of UHVAC Aluminum Tube Rigid Jumper

作　　者：李靖[1] 彭宗仁[1] 刘鹏[1] 谢天喜[1] 冯勇[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,西安710049

出　　处：《高电压技术》2010年第1期205-211,共7页High Voltage Engineering

基　　金：国家电网公司科技项目~~

摘　　要：1000 kV特高压交流输电线路耐张塔采用的铝管式刚性跳线,其跳线、间隔棒和铝管端部连接金具等结构较为复杂,电场强度较高,容易发生电晕,需要对其表面电场分布进行研究。为此运用3维有限元法,对特高压交流试验示范工程中采用的铝管式刚性跳线进行了电位和电场仿真计算,得到了跳线、铝管和端部金具表面的电场分布,并针对跳线和端部金具等场强较高的部位进行了结构改进,最终给出了跳线、铝管和端部金具的电场计算分析结论。研究结果表明,所处位置不同,8根子跳线表面的最大场强值各不相同;跳线间隔棒线夹曲率半径过小时,适当增大曲率半径能有效降低间隔棒发生电晕的概率。研究成果能够有效地避免铝管式刚性跳线发生电晕,已经成功应用于我国特高压交流试验示范工程,效果良好。Due to its complex structure, the aluminum tube rigid jumper on the strain tower of 1000 kV UHVAC transmission lines is much easier to produce serious eorona than the normal lines. With three dimensional finite element method, we calculated the potential and electric field distribution of the aluminum tube rigid jumper used in the UHVAC demonstration project,and simulated and analyzed the electric field distribution on the surface of jumper, aluminum tube and fittings, the electric field curves along rigid jumper. Based on the results, the general characteristics of electric field distribution for rigid jumper were proposed, structural optimization and checking calculation were done on the parts whose electric field strength was too high. Finally, some suggestions were given to improve the electric field distribution on the surfaces of jumper and fittings. The research achievements can prevent the aluminum tube rigid jumper from corona effectively.

关 键 词：特高压 铝管式刚性跳线 连接金具 有限元法 电场计算 结构改进 

分 类 号：TM721.2[电气工程—电力系统及自动化]