Practical calculation method and system of transmission line zero-sequence parameters

被引：0
|
作者：
Wang K. [1 ]
Jiang Y. [2 ]
Liu J. [1 ]
Chao P. [2 ]
Sun Z. [1 ]
Bao B. [1 ]
Li W. [2 ]
机构：
[1] Northeast Branch of State Grid Corporation of China, Shenyang
[2] School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin
来源：
Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2021年 / 41卷 / 04期
关键词：
Parameter identification; Practical calculation; Software development; Transmission line;
D O I：
10.16081/j.epae.202103019
中图分类号：
学科分类号：
摘要：
Based on the theoretical derivation of the transmission line parameter calculation method, the main factors that affect the transmission line parameter engineering calculation accuracy are analyzed. For the problem that the soil resistivity along the transmission line is variable and difficult to obtain accurately, a method for inferring the equivalent resistivity along the line based on the measured parameters of the lines in operation is proposed. For the transmission line characteristics of line partially on the same tower, line partially parallel and tower diversity, the section calculation method and method for simplifying parameters of tower are proposed. By studying the influence of different grounding form of ground wire on zero-sequence parameters, combined with actual investigation and analysis, the theoretical calculation formula is improved. Based on AppDesigner of MATLAB, a transmission line parameter identification system is deve-loped. The results show that the accuracy of transmission line parameter calculation and engineering practicability are obviously improved through practical improvement. © 2021, Electric Power Automation Equipment Press. All right reserved.
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页码：219 / 224
页数：5
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