750 kV同塔双回输电线路中感应电压、感应电流的研究以及接地开关的选取  

Research of Induced Voltage and Current on 750 kV Double Circuit Line on Same Tower and Selection of Grounding Switch

作　　者：欧小波[1] 韩彦华[2] 吕亮[2] 弓鹏 汲胜昌[1] 

机构地区：[1]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049 [2]陕西电力科学研究院,陕西西安710054 [3]河南超高压输变电运检公司,河南郑州450000

出　　处：《陕西电力》2011年第1期22-27,共6页Shanxi Electric Power

摘　　要：同塔双回输电线路中,当一回线路正常运行、另一回线路停电检修时,由于2回输电线路间的静电感应和电磁感应作用,在检修回路中会产生感应电压和感应电流。为确保运行检修时的可靠性和安全性,要求线路上采用的接地开关必须具有开合感应电流的能力。推导了接地开关在4种工况下感应电压和感应电流的大小,利用EMTP计算了750 kV电压等级同塔双回线路的感应电压和感应电流以及开关接地时所产生的瞬态恢复电压(TRV)的大小,为750 kV电压等级接地开关的选型提供了依据。When one of double circuit transmission lines on the same tower is in operation and the other is for examining and repair, induced voltage and current will occur on the latter line which is derived from electrostatic induction and electromagnetic coupling. To ensure the reliability and safety of the lines, the grounding switch must have a capacity of interrupting inductive current. The induced voltage and current of the 750 kV double circuit lines on the same tower as well as the TRV when switch grounding fault occurs are calculated by EMTP, and it provides guiding opinions for selecting grounding switching of the 750 kV double-circuit transmission line.

关 键 词：750 kV同塔双回线路 感应电压 感应电流 接地开关 

分 类 号：TM762[电气工程—电力系统及自动化]