Online measuring of zero-sequence parameters for coupled double-circuit transmission line

被引：4
|
作者：
机构：
[1] Liang, Zhirui
[2] Gong, Ruibang
[3] Niu, Shengsuo
[4] Zhao, Fei
[5] Zhang, Siwei
来源：
Liang, Z. (Zhiruil@sohu.com) | 1600年 / Electric Power Automation Equipment Press卷 / 33期
关键词：
Circuit modeling - Distributed parameter - Lumped parameter - Online measuring - Zero sequence parameter;
D O I：
10.3969/j.issn.1006-6047.2013.07.012
中图分类号：
学科分类号：
摘要：
The structure of coupled double-circuit transmission line is analyzed and its circuit model of zero- sequence distributed parameters and double-∏-shaped circuit model of zero-sequence lumped parameters are built. By combining the increment method with the double-∏-shaped circuit model, an algorithm is developed for the online measuring of zero-sequence lumped parameters. The conversion relationship between zero-sequence lumped parameters and distributed parameters is deduced, based on which, an algorithm is proposed for the online measuring of distributed parameters. Simulative experiments are carried out for 500 kV coupled double-circuit transmission line with different lengths. The simulative results show that the proposed circuit model and online measuring algorithms are applicable to the online measuring of power system zero-sequence parameters.
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