输电线路表面金属粘附物对其周围电场强度的影响  

Study on the Influence of Surface Electric Field Intensity of Transmission Line with Metal Particles

作　　者：安帅[1] 淡淑恒[1] 

机构地区：[1]上海电力学院电气工程学院,上海200090

出　　处：《电力与能源》2013年第6期568-570,共3页Power & Energy

基　　金：国家自然科学基金项目(50577040)

摘　　要：输电线路表面粘附的金属颗粒,会影响导线周围的电场强度。它对电场强度的影响有多大,利用以往的计算方法无法得出。但是,利用有限元分析软件对输电线路进行仿真,可以得出3条结论:金属颗粒半径越小,表面最大电场强度越大;随着金属颗粒半径增大,表面最大电场强度减小,并逐渐趋于正常值的2倍;对于不同半径的金属颗粒,其影响的区域主要集中在以金属颗粒表面最大电场强度点为圆心,3倍金属颗粒半径长度为半径的范围内。研究表明,输电线路表面粘附金属颗粒,会给导线和电网运行带来不安全因素,这种状况应当设法避免。The metal particles which adhered to the surface of the transmission line affect the electric field in- tensity around the line. If we use the previous method to study this issue, the effect of the metal particles on the line can not be measure. However, this paper used finite element analysis software to analysis this prob- lem, and coule draw the following conclusions： the smaller the radius of the metal particles was , the larger the maximum electric field intensity on the line surface was; as the metal particle＇s radius becoming bigger, the maximum electric field intensity on its surface decreased gradually to the value that is twice the normal; for clifferent radius of metal particles on the line, the affected area was a semicircle whose center was at the point of maximum electric field intensity, and radius was three times of the metal particle＇s radius . In a conclusion, the presence of the metal particles on the surface of the wire takes disadvantage of it, and needs to avoid this situation.

关 键 词：输电线路 电场分析 有限元分析 ANSOFT MAXWELL 

分 类 号：TM751[电气工程—电力系统及自动化]