摘要
介绍在地线绝缘化改造过程中,地线绝缘子的安装方式不同,会导致地线的相对位置不同,进而使得输电线路的保护角发生变化,影响线路的绕击耐雷性能。本文在不同的地线绝缘化改造方式下,通过ATP-EMTP平台计算了5种不同塔型的绕击耐雷水平,并通过电气几何模型(EGM)计算了这些塔型的绕击跳闸率。结果表明,地线绝缘化改造对线路绕击耐雷水平影响较小,但是,对绕击跳闸率影响较大。
Based on the different wire insulation transformation mode, lightning level around 5 different types of tower was calculated by the ATP-EMTP platform, and through the electrical geometric model （EGM） shielding failure trip rate of these types of tower are calculated. The results show that the wire insulation transformation on the line around the small effect of lightning level but a greater impact on the shielding failure rate.
出处
《云南电力技术》
2016年第5期96-99,共4页
Yunnan Electric Power
关键词
地线绝缘化
绕击
耐雷水平
跳闸率
电气几何模型
Wire insulation
shielding
lightning protection level
failure rate
electrical geometric model
