±500kV直流输电线路雷电闪络风险等级评估及差异化防雷措施改进方案

Assessment of Lightning Flashover Risk Level of ±500 kV HVDC Transmission Line and Improvement Scheme of Differentiated Lightning Protection Measures

摘要: 根据内蒙古东部地区雷电定位系统获取的雷电参数及线路走廊雷电活动情况，考虑地形地貌、线路结构和绝缘配置等多方面的因素，对伊穆±500 kV直流输电线路进行绕击差异化防雷风险等级评估。根据评估结果，对风险等级处于D级的杆塔提出防雷措施改进方案，即在杆塔正极导线上加装1支避雷器，降低线路绕击跳闸率。

Abstract: According to the lightning parameters obtained by lightning location system in the east of Inner Mongolia, according to the lightning activity in the corridor, consider the factors of topography, line structure and insulation configuration, shielding difference level of risk assessment of lightning alienation Yimu ±500 kV HVDC transmission line.According to the evaluation result, the paper proposed the the improvement scheme of lightning protection measures for the tower with the risk grade of D, installing lighting arrester on the positive pole of the tower to reduce the trip rate of the line.