不同子导线排列下电场精细化模拟研究  

Research on fine simulation of electric field under different sub wire arrangement

作　　者：魏建华 赵文彬 李敏 WEI Jian-hua;ZHAO Wen-bin;LI Min(School of Electrical Engineering, Shanghai University of Electric Power, Shanghai 200090, China;School of Energy and Mechanical Engineering, Shanghai University of Electric Power, Shanghai 200090, China)

机构地区：[1]上海电力大学电气工程学院,上海200090 [2]上海电力大学能源与机械工程学院,上海200090

出　　处：《电工电能新技术》2022年第1期17-23,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金项目(52005315)。

摘　　要：高压输电线路常采用多分裂导线提高单位输电线路的输电容量,由于子导线之间的互相影响,表面电场分布并不均匀。这种不均匀性增大了相导线的表面电场强度,导线表面场强达到电晕起始场强后,会产生电晕乃至放电,从而产生电晕损耗、电磁、无线电干扰、可听噪声以及加速老化等问题,威胁线路的正常运行。目前国内外通过有限元法对不同布局时的分裂导线电场强度进行仿真分析,但在分析时往往将各子导线视为光滑圆柱体。本文在有限元法的基础上,对不同相导线布置方式下的子导线按照是否考虑外形轮廓进行仿真对比,结果表明,分析导线表面电场时应充分考虑导线外形轮廓对周围电场畸变造成的影响,而对于远大于导线线径部位的电场,可以忽略导线外形轮廓看作圆形来处理。Multi bundled conductors are often used in high voltage transmission lines to improve the transmission capacity of a unit transmission line.Due to the interaction between the sub conductors,the surface electric field distribution is not uniform.This kind of non-uniformity increases the surface electric field strength of phase conductor.When the surface electric field strength of conductor reaches the initial electric field strength of corona,it will produce corona and even discharge,resulting in corona loss,electromagnetic,radio interference,audible noise,accelerated aging and other problems,threatening the normal operation of the line.At present,the finite element method is used to simulate the electric field strength of bundled conductors in different conditions at home and abroad.In this paper,based on the finite element method,the simulation and comparison of the sub conductors with different phase conductor arrangement are carried out according to whether the outline is considered or not.The results show that the influence of the outline of the conductor on the distortion of the surrounding electric field should be fully considered when analyzing the electric field on the surface of the conductor.For the electric field far larger than the diameter of the conductor,the outline of the conductor can be ignored and treated as a circle.

关 键 词：高压输电线路 表面电场 有限元法 电晕放电 

分 类 号：TM75[电气工程—电力系统及自动化]