导线带电雾凇覆冰过程的电晕放电特性研究  

Study on the Corona Discharge Characteristics of the Conductor During Energized Rime Icing

作　　者：李松林 张满[2] 杜佳潞 

机构地区：[1]中国石油川庆钻探工程有限公司井下作业公司,成都610051 [2]国网重庆市电力公司检修分公司,重庆400044

出　　处：《高压电器》2016年第9期127-131,共5页High Voltage Apparatus

基　　金：国家重点基础研究发展计划资助项目(973计划2009CB724502;2009CB724501);国家重点实验室资助项目(2007DA10512708101;2007DA10512708102)~~

摘　　要：输电线路带电覆冰时,水滴会在接近导线表面过程中会引发局部电晕,而冰层会促使电晕放电更加明显,从而对电网的安全运行及其经济效益产生严重影响。目前国内外针对导线在涂污、淋雨等自然条件下的电晕放电特性进行了较为深入的研究,但针对覆冰过程中的电晕动态特性研究却尚未见报端。故文中在人工气候试验室对导线进行带电雾凇覆冰,利用Q-U法测得覆冰过程中的电晕放电量及放电功率的变化。试验结果表明:不同场强覆冰时的短时电晕放电量和放电功率不同,其大小随场强的增加而增加;覆冰时间的增加会使放电量及放电功率先增加后饱和,并稍有减少;强电场下的覆冰电晕放电维持电压会逐渐增加。文中所得结论可为揭示雾凇频发地区的输电线路电晕特性研究提供理论依据。During the process of the energized icing on transmission line, partial corona discharge will be produced by the behavior of the water drops around the conductor surface, and the discharge could be more obvious after rime icing, which will threat the safe operation and economic benefits of the transmission lines. Although the corona discharge characteristics under dirty or rain conditions were studied intensively by the scholars, there is no research on dynamic characteristics during the icing process has been reported. In this paper, the authors make energization of rime icing in the artificial climate chamber,the Q-U method is applied to measure the change of corona discharge and discharge power. Results show that different surface potential leads to various short-time corona discharge or discharge power, and the quantity will be increased with the field strength. The icing time will increase the quantity of the corona discharge and discharge power first, and then it will be saturation and slightly reduced. The maintain discharge will be increased gradually under the strong electrical field. The conclusion of this paper can provide a theoretical basis for revealing the corona characteristics of the transmission line in the rime area.

关 键 词：导线 雾凇 电晕放电 带电覆冰 动态特性 

分 类 号：TM75[电气工程—电力系统及自动化]