摘要
1000k V输电线路的雷害事故是造成输电线路跳闸的重要原因,因此对特高压输电线路进行雷电过电压研究是十分必要的。在我国变电站的绝缘裕度设计中,忽略了输电线路上的冲击电晕是影响雷电波衰减和变形的一项重要因素,从而使得对电气设备的绝缘要求过严。本文采用国际通用的电磁暂态程序ATP-EMTP程序对雷击下的1000k V输电线路的不同电晕模型进行仿真,并探讨改进的电晕模型,计算结果为1000k V特高压输电线路的的防雷设计和运行提供了参考。
The lightning disturbance accident of 1000 k V transmission line is one of the important reasons causing transmission line trip, so it is especially necessary to study on the lightning overvoltage of UHV transmission line. In the insulation margin design of the substation,an important factor in the effect of the impulse corona on transmission line that affect lightning waves attenuation and distortion are ofen ignored, which leads to make strict requirements for the insulation of electrical equipments. Different corona models are estabished by using the electromagnetic transient program ATP-EMTP to simulate the lightning overvoltage of 1000 k V transmisiion line. And an improved corona model is discussed in this paper. The results provide reference for lightning protection design and operation of UHV transmission line.
出处
《电气技术》
2015年第5期6-11,共6页
Electrical Engineering
