750kV三相输电导线表面的起晕电场分析  

Analysis of Corona Onset Electric Field on the Surface of 750kV Three-Phase Transmission Lines

作　　者：兰生[1] 张振兴[1] 原永滨[1] 

机构地区：[1]福州大学电气工程与自动化学院,福州350108

出　　处：《华东电力》2012年第12期2168-2172,共5页East China Electric Power

摘　　要：通过有限元法计算了不同分裂导线、截面积、对地高度时分裂导线表面场强。计算结果表明采用分裂导线可以有效降低表面场强,从而达到抑制电晕放电的作用。借助皮克的导线电晕起始场强经验公式,得出750 kV输电线路采用6分裂导线比较合理。同理,适当改变导线截面和对地高度也可以降低导线表面场强。In this paper,the electric field intensity on the surface of bundle conductors is calculated respectively by use of FEM method,considering the difference in the type of bundle conductors,sectional area and terrain clearance.The calculation results show that the bundle conductors can effectively reduce the surface electric field intensity,thus suppressing corona discharge.Through Peek′s experience formula on conductor corona onset electric field intensity,it is concluded that six-bundle conductor is more applicable to 750kV transmission line.Meanwhile,the appropriate adjustment of conductor sectional area and terrain clearance can also reduce the surface electric field intensity.

关 键 词：750kV 电晕放电 分裂导线 表面场强 有限元法 

分 类 号：TM75[电气工程—电力系统及自动化]