雾水电导率对输电线路交流电晕特性的影响  

Influence of Fog Water Conductivity on AC Corona Characteristics of Transmission Line

作　　者：蒋兴良[1] 黄俊[1] 董冰冰[1] 周龙武[1] 袁超[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030

出　　处：《高电压技术》2013年第3期636-641,共6页High Voltage Engineering

基　　金：国家重点基础研究发展计划(973计划)(2009CB724501;2009CB724502);国家创新研究群体基金(51021005)~~

摘　　要：导线电晕放电会产生能量损失、无线电干扰、可听噪声等效应,但目前关于雾的电导率对导线电晕特性的影响研究还较少。为此,采用超声波雾发生装置,产生不同电导率的雾水,在自制电晕笼中试验研究了雾水电导率对输电线路导线交流电晕特性的影响。研究结果表明:雾水电导率对交流输电线路导线电晕的产生存在显著影响;雾水电导率越高,导线周围空气就越容易发生电离;附着在导线表面的雾颗粒形成小的放电尖端,使导线表面电场发生畸变,雾水电导率越高,畸变就越严重,使导线起晕电压越低。因此输电线路电晕限制条件应考虑雾水电导率的影响。Corona discharge of conductors may cause power loss,radio disturbance,acoustic noise and so on,and effect of fog conductivity on transmission line corona characteristic is seldom researched.Thus,we experimentally researched and simulated different fog water conductivities in corona cage by using ultrasonic fog generator to research the influence of fog and its conductivity on corona performance of AC transmission lines.The results show that fog water conductivity significantly affects the corona performance： higher fog water conductivity leads to lower corona inception voltage,since it will make the air ionizing severer;the fog water particles adhering to the conductor surface may cause the electric field distortion,which decreases the corona inception voltage consequently.It is concluded that fog water conductivity should be taken into consideration for corona limitiation on transmission lines.

关 键 词：雾水电导率 电晕笼 交流 电晕起始电压 平均光子数 输电线路 

分 类 号：TM851[电气工程—高电压与绝缘技术]