摘要
同走廊并行交流输电线路工程的电磁环境较单回线路复杂,传统的模拟电荷法及有限元法无法适用于大空间尺度下的同走廊并行线路工频电场计算。为此,文中提出了一种基于矩量法的同走廊并行交流输电线路工频电场的求解算法。该算法考虑了单相导线的弧垂,依据其空间悬链线形状方程,推导出与弧垂相关的单相导线电场积分方程,从而采用矢量叠加原理获得同走廊并行交流线路在空间任意场点处的电场积分方程。采用脉冲函数和狄克拉函数,通过矩量法对该电场积分方程进行离散,最终得到输电线路的工频电场值。以三峡大学220 kV跨沁园并行输电线路为例,根据仿真计算与实验验证结果,认为相比于模拟电荷法,文中算法的计算结果与实情更为符合,适用于同走廊并行交流输电线路的电场研究。
The electromagnetic environment under AC parallel transmission lines in the same corridor is more complex than the single circuit line.Traditional charge simulation method(CSM)and finite element method could not be applied in the calculation of power frequency electric field for parallel transmission lines in the same corridor at large spatial scales.Therefore,an algorithm is proposed of calculating power frequency electric field for AC parallel transmission lines in the same corridor based on the methods of moments(MOM).This algorithm considers the singlephase conductor arc sag,according to the equation of catenary,and the electric field integral equation of singlephase conductor is derived related to arc sag.Thus,the electric field integral equation at any point of the space of AC parallel transmission lines in the same corridor is obtained by the vector superposition principle.Using the function of pulse and DC,the electric field integral equation is discrete by MOM.Finally,the value of power frequency electric field under transmission lines is obtained.Taking the China Three Gorges University 220 kV transmission line over Qinyuan as an example,according to the results of simulation and experimental,this algorithm is more coincidence with the truth than that compared to the CSM.And it is also applied to the study of electric field for AC parallel transmission lines in the same corridor
作者
唐波
江浩田
孙睿
刘任
吴卓
TANG Bo;JIANG Haotian;SUN Rui;LIU Ren;WU Zhuo(College of Electrical Engineering &New Energy,China Three Gorges University,Hubei Yichang 443002,China)
出处
《高压电器》
CAS
CSCD
北大核心
2018年第12期104-109,共6页
High Voltage Apparatus
基金
国家自然科学基金项目(51307098)~~
关键词
同走廊并行交流输电线路
工频电场
模拟电荷法
矩量法
电场测量
parallel transmission lines in the same corridor
power frequency electric field
CSM
MOM
electric field measurement
