摘要
紧凑型输电线路反击是造成其线路跳闸的重要原因。对云南地区近年来雷击跳闸以及雷电活动情况进行统计调查分析,运用电磁暂态模型对500 kV紧凑型输电线路雷电反击机理进行研究分析,结果表明,紧凑型输电线路的耐雷水平随着海拔高度的增加而有所下降;接地电阻、杆塔高度对紧凑型线路反击耐雷水平的影响要略小于对常规线路的影响。
Back stroke on compact transmission line is an important cause of trip-out.Based on the statistical investigation and analysis of the lightning trip-out and lightning activity in Yunnan in recent years,the paper uses the electromagnetic transient model to study and analyze the back stroke mechanism of 500 kV compact transmission lines.The results show that the back stroke lightning withstand level of compact transmission lines decreases with the increase of altitude,and the impact of grounding resistance and the height of tower on its back stroke lightning withstand level is less than that of conventional transmission lines.
出处
《陕西电力》
2015年第2期9-13,共5页
Shanxi Electric Power
基金
国家自然科学基金项目资助(U1134106)
关键词
紧凑型输电线路
反击
防雷性能
compact transmission line
back striking
lightning protection performance