±500kV直流输电线路避雷器防雷性能研究

摘要

In order to study the lightning protection methods for dc transmission line, based on the background of Meng Dong Yimu ± 500 kV DC transmission line, this paper adopted the electromagnetic transient analysis software ATP-EMTP to analyze the counterattack lightning withstand level, and used EGM to analyze counterattack around lightning withstand level, calculated the discharge current and the maximum energy absorption that the line arrest-ers can withstand, and studied the protection effect of line arresters on ± 500 kV DC transmission line.%为研究直流输电线路防雷保护措施,以蒙东伊穆± 500 kV直流输电线路为背景,采用电磁暂态软件ATP-EMTP分析± 500 kV直流输电线的反击耐雷特性,采用改进电气几何模型分析± 500 kV直流输电线的绕击耐雷特性. 计算了线路避雷器能够满足耐受的放电电流和最大吸收能量,同时研究了线路避雷器对± 500 kV直流输电线的保护效果.