输电线路旁物体对线路绕击跳闸率的影响  

Influence of objects on shielding failure rate of transmission line

作　　者：刘渝根[1] 孟宪[1] 田金虎[1] 刘小二[1] 

机构地区：[1]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400044

出　　处：《中国电力》2009年第3期40-43,共4页Electric Power

摘　　要：国内目前在输电线路雷击跳闸率计算中,考虑输电线路绕击跳闸率的主要影响因素有保护角、塔高、地面坡度等。我国输电线路大部分地处旷野,以山区、丘陵地带较多。输电线路长度较长,难免跨越高山、森林植被覆盖率较高的地区,因此考虑输电线路旁一定高度物体对线路绕击跳闸率的影响相当必要。应用EGM法分析输电线路旁物高对线路绕击率的影响因素。结果表明,输电线路旁物高对线路绕击跳闸率的影响因素包括线路高度、物体高度、物体与输电线路的水平距离等。At present, the factors which influence on the shielding failure calculation of transmission line are most considered such as shielding angle, tower height and so on. Most of the transmission lines are located in the wilderness, mountains and hilly. Nearly all the transmission line have a long distance, so it is quite necessary to consider the influence of objects on shielding failure calculation of transmission line. This paper analyzed the effect of objects on shielding failure rate using electric geometric model （EGM）. The results show that the influence of objects on the shielding failure rate related to some factors such as the height of transmission lines, the height of objects, and the distance between them etc.

关 键 词：物体高度 输电线路 绕击跳闸率 电气几何模型 

分 类 号：TM75[电气工程—电力系统及自动化]