刘海宁,何梓麟,何康,覃远铖,唐金锐
LIU Haining,HE Zilin,HE Kang,QIN Yuancheng,TANG Jinrui

• 1:广东电网有限责任公司广州供电局
• 2:武汉理工大学自动化学院

摘要(Abstract)：

高压架空输电线路邻近树木时存在树木尖端电晕放电烧灼与输电线路闪络的安全隐患，严重时甚至可能造成线路停电。为研究树木附近架空输电线路的电场分布特性，分别采用变步长和有限元网格剖分的方法来配置导线和树木模型中的模拟电荷和匹配点。运用模拟电荷法对线路走廊内存在树木时水平排列的500 kV架空输电线路的电场分布展开计算，结果表明：树木上方的电场强度随着树木数量和种植密度的增加而减小；当树木的位置由中心导线向边相导线偏离时，树冠上方的电场强度先减小后增大，在偏移距离为14 m时达到最大值20.5 kV/m；根据最短路径平均电场强度确定了树木与500 kV导线之间的最小净空距离为1.2 m，为线路走廊植被管理提供了参考依据。
Safety hazards such as corona discharge, burning, and flashover occur atop trees adjacent to high-voltage transmission lines, resulting in power outages in severe cases. The simulated charge and matching points in the conductor and tree models are configured respectively by the variable step-size method and finite element mesh dissection to study the electric field distribution characteristics of overhead transmission lines adjacent to trees. The charge simulation method calculates the electric field distribution of horizontally aligned 500 kV overhead transmission lines in the presence of trees in the line corridor. The results show that the electric field intensity above the trees decreases with the increase in the number and density of trees. As the trees deviate from the central conductor to the side phase conductor, the electric field intensity above the crown decreases before it increases, reaching a maximum value of 20.5 kV/m at a deviation distance of 14 meters. The minimum midspan clearance between trees and 500 kV conductors is determined to be 1.2 meters according to the average electric field strength of the shortest path.The method provides a reference basis for line corridor vegetation management.

关键词(KeyWords)： 电场分布;模拟电荷法;架空输电线路;电晕放电
electric field distribution;charge simulation method;overhead transmission lines;corona discharge

Abstract:

Keywords:

基金项目(Foundation): 中国南方电网有限责任公司科技项目（080008KK52190008(GZHKJXM20190097)）

作者(Author): 刘海宁,何梓麟,何康,覃远铖,唐金锐
LIU Haining,HE Zilin,HE Kang,QIN Yuancheng,TANG Jinrui

DOI: 10.19585/j.zjdl.202301009

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