复杂地形线路绕击跳闸率计算及防雷治理  

Shielding Failure Flashover Rate Calculation and Lightning Protection Improvement for Transmission Lines in Complex Terrain

作　　者：杨杰 吕晓燕 赵波 YANG Jie;LU Xiaoyan;ZHAO Bo(The Maintenance Company Datong Branch of State grid Jibei Electric Power,Datong 037005,China;Datong Power Supply Company of State grid Shanxi Electric Power,Datong 037000,China)

机构地区：[1]国网冀北电力有限公司检修分公司大同分部,山西大同037006 [2]国网山西省电力公司大同供电公司,山西大同037000

出　　处：《电瓷避雷器》2018年第6期74-80,共7页Insulators and Surge Arresters

摘　　要：500 kV神保一线雷害较为严重,且杆塔多处高山大岭地区。线路部分杆塔虽已安装避雷器,仍发生了雷击跳闸事故。因此,运维单位在防雷治理过程中,提出一种基于线路档段的导线跳闸率计算方法。通过合理获取导地线海拔高度、地面倾角等信息,以线路走向为基准线,利用MATLAB软件模拟导地线离地高度、线路两侧地面倾角以及保护角的变化,实现复杂山区线路防雷性能的评估。最后,以四级雷害区内复杂地形杆塔的计算结果为依据,制定线路避雷器安装方案,并通过实践证明了该方法的有效性。The lightning of 500 kV Shenbao one line is more serious,and many towers of the line are in mountain areas. Although many line arresters have been installed on some towers of the line,but still lightning failures had happened. Therefore,The Maintenance Company Datong Branch proposes a method to calculate wire trip rate,which is based on Line segment. It is reasonable to get the information of elevation and the ground angle. By using MTALAB,it have been simulated along the line that include the height of the wires to ground,both sides the ground angle of the line and the protection angle. The wire trip rate has been calculated for the line,which is in the complex mountain. Finally,based on the calculation results of the towers of the line,which is cross the complex mountain-area in the fourth level lightning hazard area. The installation scheme of the line arrester has been made. and the effectiveness of the method is proved by practice.

关 键 词：电气几何模型 地形地貌 地面倾角 MATLAB 差异化 

分 类 号：TM863[电气工程—高电压与绝缘技术]