雾水电导率对交流输电线路电晕放电量的影响  

Influence of Impurity Water Conductivity on Corona Discharge Quantity of AC Transmission Line

作　　者：彭华东 伍炜卫 胡琴[2] 李永福 何高辉[2] 胡可 

机构地区：[1]国网重庆市电力公司电力科学研究院,重庆401123 [2]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 [3]国网重庆市电力公司武隆区供电公司,武隆408500

出　　处：《高电压技术》2018年第2期548-553,共6页High Voltage Engineering

基　　金：国网重庆市电力公司科技项目(SGCQDK00PJJS1600049);国家自然科学基金(51321063)~~

摘　　要：目前有关雾水电导率对导线电晕放电量的研究还很少,为了进一步了解导线电晕特性,利用紫外成像仪、局部放电检测仪、超声波雾发生装置和示波器,在电晕笼中进行了试验,通过脉冲电流法来研究不同电场强度、雾水电导率和导线表面粗糙程度对导线电晕放电量的影响,并揭示了它们对电晕放电特性的影响。研究结果表明：当导线表面饱和受潮出现水滴附着时,雾水电导率会对导线的电晕放电量产生很大的影响;在同等电场强度下,导线的电晕放电量随着雾水电导率的增加而增大;电晕放电量随着电场强度的增大而增加,但在电场强度增大到一定值后,放电量将趋于饱和;放电量与导线表面的粗糙度密切相关,导线表面越粗糙,导线的电晕放电量就越大。根据研究结果,建议在研究雾天导线电晕放电量时考虑雾水电导率的影响。The influence of fog water conductivity on conductor corona discharge quantity is seldomly studied. In order to understand the conductor corona characteristics, we adopted the ultraviolet imager, partial discharge detector, ultrasonic atomizer, and oscilloscope to conduct experiments in a corona cage. By applying pulse current method, we studied the influence of electric field intensity, fog water conductivity, and conductor roughness on conductor corona discharge quantity and corona discharge characteristics. Study results show that when water droplet emerges on the conductor surface, the fog water conductivity will have a significant influence on corona discharge quantity, the corona discharge quantity will increase with the growth of fog water conductivity when subjected to the same electric field intensity; and the corona discharge quantity will grow with the electric field intensity, but the discharge quantity tends to be saturated when the electric field intensity reaches a certain threshold value; in addition, the discharge quantity is related to the conductor roughness closely, the harsher of the conductor surface, the bigger of the conductor corona discharge quantity is. It is recommended that the effect of fog conductivity should be taken into consideration when studying the wire corona discharge quantity in fog.

关 键 词：电晕 交流输电导线 电场强度 雾水电导率 粗糙度 放电量 

分 类 号：TM75[电气工程—电力系统及自动化]