导线雷电冲击电晕特性试验研究  

Experimental Researches on Lightning Impulse Corona Characteristics of Conductors

作　　者：杨鹏程[1] 徐涛[2] 叶奇明[2] 甘鹏[2] 谢梁[2] 邬雄[2] 陈水明[1] 

机构地区：[1]电力系统及发电设备控制和仿真国家重点实验室(清华大学电机系),北京市海淀区100084 [2]国网电力科学研究院,湖北省武汉市430074

出　　处：《中国电机工程学报》2012年第28期164-170,4,共7页Proceedings of the CSEE

基　　金：国家自然科学基金项目(50737001)~~

摘　　要：雷电侵入波的特性对变电站内设备的绝缘裕度设计有较大的影响,而目前中国进行变电站设备雷电绝缘裕度设计中,忽略了输电线路的电晕会引起雷电侵入波衰减畸变,导致设计结果通常较为保守,因此有必要对雷电冲击电晕进行系统研究。在中国特高压交流试验基地开展了冲击电晕试验,对输电线路中常用的导线进行了雷电冲击电晕试验研究,总结了不同导线的雷电冲击电晕伏库特性曲线。试验结果表明:在雷电冲击下导线起晕较为明显,不同导线的伏库特性曲线表现出一定的规律性,且在正极性雷电冲击下导线表现出明显的起晕延时现象。基于试验结果可建立相应的线路冲击电晕模型,应用于电磁暂态软件中仿真计算线路冲击电晕对线路雷电侵入波的影响。When lightning strikes at transmission line, the lightning waves will go into the substations along the transmission lines and have great harmful effect on the equipment. In China, the design of equipment lightning insulation often ignores the effect of impulse corona on transmission lines. As the impulse corona could lead great attenuation and distortion to the lightning waves, the margins of the traditional designs are great. In this paper, series experiments were carried out in China UHV AC test base and Q-V characteristic curves of different conductors were got. Results show that as the number of bundle conductors increases, the corona inception voltages increase. The positive impulse corona occurs a little time later than the lightning impulse voltage exceeds the corona inception voltages. In the end of this paper, a corona model based on the test results that could be used in electromagnetic transient calculation software is proposed.

关 键 词：特高压 雷电冲击 分裂导线 电晕笼 冲击电晕 电磁暂态计算 

分 类 号：TM85[电气工程—高电压与绝缘技术]