Setting Method of Traveling Wave Protection Considering Transfer Characteristics of DC Voltage Divider

被引：0
作者：
Peng H. [1 ]
Liao K. [1 ]
Li B. [1 ]
Li X. [2 ]
He Z. [1 ]
机构：
[1] School of Electrical Engineering, Southwest Jiaotong University, Chengdu
[2] Electric Power Research Institute of State Grid Sichuan Electric Power Company, Chengdu
来源：
Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2022年 / 46卷 / 05期
关键词：
DC voltage divider; Setting; Transfer characteristic; Traveling wave protection; Ultra high voltage direct current (UHVDC) transmission;
D O I：
10.7500/AEPS20210608004
中图分类号：
学科分类号：
摘要：
Travelling wave protection is the main protection for the transmission line of the ultra high voltage direct current (UHVDC) transmission system, and its operation accuracy is directly related to the safe and stable operation of the DC transmission system. The generation of the fault characteristic quantity in each criterion of the travelling wave protection is based on the measured value of the DC voltage divider. However, the DC voltage divider is difficult to accurately transfer the signal at every frequency band, which leads to the decrease of the reliability of traveling wave protection. Firstly, the transfer function of the DC voltage divider is derived based on the equivalent circuit model of the DC voltage divider, and the transfer characteristics of the DC voltage divider to signals in the time domain and frequency domain are analyzed. Secondly, combining the criterion and logic of traveling wave protection, the influence of the transfer characteristics of the DC voltage divider on the performance of the traveling wave protection is studied. Then, the transfer characteristics of the DC voltage divider are incorporated into the setting process as a factor which affects the setting of the traveling wave protection, and a setting method of traveling wave protection considering the transfer characteristics of the DC voltage divider is proposed. Finally, a simulation model concerning actual engineering parameters is built to verify the effectiveness and reliability of the proposed method. The results show that the proposed method can effectively improve the reliability of the traveling wave protection setting. © 2022 Automation of Electric Power Systems Press.
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页码：179 / 187
页数：8
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