电力工程技术2024，Vol.43Issue(4)：88-94,146,8.DOI:10.12158/j.2096-3203.2024.04.009
电力系统架空多导体传输线的高频耦合电流计算模型
High-frequency coupling current calculation model of overhead multi-conductor transmission lines in electric power system
摘要
Abstract
Overhead transmission lines are the significant component of electric power system,where the over current can be coupled with the transient electromagnetic field or excitations(such as high-altitude electromagnetic pulse).As the coupling path of strong electro-magnetic interference,overhead transmission lines cause serious interference to the power system.Among the existing modelling methods,the classical transmission line theory may generate large error when dealing with the high-frequency coupling problem,where the cross dimension of the transmission line is not electrically small.Numerical full-wave method(such as moment of method)which relies on the grid subdivision with low efficiency when dealing with long transmission lines.Moreover,the number of cables is usually large in electric power system,and the ground are considered as the lossy ground.Therefore,to address the above mentioned problems,an asymptotic method is proposed to calculate the high-frequency coupling current along overhead transmission lines in electric power system.Based on the asymptotic theory with high calculation efficiency,the scattering and reflection process are introduced to quantify higher-order model components.In addition,the arbitrary number of wires,arbitrary parameters of the ground and different excitations are considered to derivate the current expression.Finally,the validity and reliability of the proposed method are tested using the full-wave simulation and antenna irradiation experiment.The proposed method can quickly calculate high-frequency coupling current,which can provide theoretical basis and data support for protection and electromagnetic effect study of overhead transmission lines.关键词
架空传输线/有损耗地面/渐近法/高频耦合电流/全波数值算法/天线辐照实验Key words
overhead transmission lines/lossy ground/asymptotic method/high-frequency coupling current/full-wave numerical algorithm/antenna irradiation experiment分类
信息技术与安全科学引用本文复制引用
谢玮琛,郭俊,郑群爽,谢彦召..电力系统架空多导体传输线的高频耦合电流计算模型[J].电力工程技术,2024,43(4):88-94,146,8.基金项目
国家自然科学基金资助项目(52207015) 本文得到强脉冲辐射场模拟与效应国家重点实验室项目(SKLIPR1909)资助,谨此致谢! （52207015）
