摘要
为了提高配网线路分布参数的计算精度,本文提出一种有效的雷电环境下线路经过非理想大地时的分布参数计算方法。首先针对雷电流的高幅值、高频率特性带来的电晕问题和集肤效应问题,分析了传输线的起晕特性和集肤效应特性,建立了相应的输电线路等效模型;其次针对线路经过非理想大地的问题,本文利用复镜像法对线路的分布参数,包括分布电容和分布阻抗,进行了分析计算;最后为了研究集肤效应对线路分布参数的影响,本文还分析计算了复镜像深度算法下线路电阻和电感随频率的变化关系。文章的分析表明,基于复镜像深度算法的线路分布参数计算方法具有更高的精确性,同时在集肤效应的作用下,随着频率的增加,线路的分布电阻随之增加而分布电感则随之降低。
In order to improve the accuracy of distributed parameter calculation of the distribution network line,this paper presents an effective method for calculating the distribution parameters while the space line goes through non-ideal ground under lightening condition. First,aiming at the problem of corona and skin effect caused by the high amplitude and high frequency of lightening current,the corona onset characteristic and skin effect characteristic of space line are analyzed. and the corresponding equivalent model of transmission line is established. Secondly,for the problem that space line goes through non-ideal ground,t the distributed parameters of transmission line are analyzed by complex image method. Finally,in order to study the influence of skin effect on line distribution parameters,the relationship between line resistance and inductance with frequency under complex image depth algorithm is analyzed and calculated. The analysis of the paper shows that the method based on the complex image depth algorithm is more accurate. At the same time,with the increase of frequency,the distributed resistance of the line increases and the distributed inductance decreases.
作者
谢荣斌
陈宣林
刘臣飞
李江涛
汪毅峰
冯欣
XIE Rongbin;CHEN Xuanlin;LI Jiangtao;WANG Yifeng;FENG Xin(Guiyang Xifeng Power Supply Bureau of Guizhou Power Grid Co.,Ltd.,Guiyang,551100Guizhou,China;Department of Electrical Engineering,Xi'an Jiaotong University,Xi'an710000Shaanxi,China)
出处
《电力大数据》
2019年第2期53-58,共6页
Power Systems and Big Data
基金
贵州电网有限责任公司科技项目(编号:GZKJXM20170168)
关键词
配网线路
分布参数
集肤效应
频率特性
distribution network
distribution parameters
skin effect
frequency characteristic
