表面污秽对交流导线电晕损失特性的影响规律  

Influence Rule of Surface Contamination to Corona Loss Characteristics of AC Transmission Lines

作　　者：律方成[1] 朱雷[1] 刘云鹏[1] 周国杨[1] 李玥翰[1] 

机构地区：[1]华北电力大学河北省输变电设备安全防御重点实验室,保定071003

出　　处：《高电压技术》2013年第6期1476-1480,共5页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2011CB209401);国家自然科学基金(51277073)~~

摘　　要：为研究长期运行交流输电导线表面附着的污秽物对导线电晕特性的影响,采用尺寸为1.8m×1.8m×4m的电晕笼,对钢管表面分别涂有不同质量颗粒度的高岭土、碳颗粒、沙颗粒的电晕损失进行了测量。试验结果表明:污秽物的相对介电常数、颗粒度、沉积量是影响交流导线电晕损失的重要影响因素;污秽导线的电晕损失随着相对介电常数的增加而显著增加,随着同种污秽颗粒的颗粒度变大而随之增大,但增大趋势没有相对介电常数的影响明显;随着污秽物沉积量的增加而增加。采用Ansys软件对模拟导线表面电场进行了仿真,结果表明:污秽颗粒顶部最大电场强度随相对介电常数的增加而增加,随球形污秽颗粒度的增加而减小,随着锥形污秽颗粒度的增加而增加。We studied the influence of adhered contamination on the corona discharge characteristics of long-term operation conductors. Using a corona cage of 1.8 m× 1.8 m×4 m, we measured the corona loss of simulation conductors, which had surfaces brushed with kaolin soil, carbon particles, sand particles and their mixtures of different qualities. The test results show that the relative dielectric constant, particle size, and adhesion amount are the three main factors that influence the corona loss characteristics of AC transmission lines; the corona loss value increases with the relative dielectric constant of the contamination; the corona loss increases with the granularity of the same contamination, but this tendency is not apparent; the corona loss of contaminated conductor increases with the contamination adhesion amount. Furthermore, we also simulated the surface electric field by using the software Ansys, showing that the maximum electric field strength on the top of contamination particle increases with the relative dielectric constant as well as the particle size of the cone particle, but decreases with the increasing particle size.

关 键 词：污秽颗粒 相对介电常数 颗粒度 沉积量 电晕损失 表面电场强度 交流输电线路 

分 类 号：TM851[电气工程—高电压与绝缘技术]