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.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
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)~~
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
fog water conductivity
corona cage
alternating current
corona inception voltage
average photon number
transmission line
