电网技术2011，Vol.35Issue(9)：46-50,5.
基于贝瑞隆模型的半波长交流输电线路电流差动保护原理
A Bergeron Model Based Current Differential Protection Principle for UHV Half-wavelength AC Transmission Line
肖仕武 1程艳杰 1王亚2
作者信息
- 1. 华北电力大学电气与电子工程学院,北京市昌平区102206
- 2. 柳州供电局,广西壮族自治区柳州市545000
- 折叠
摘要
Abstract
Due to its features in long transmission distance and high voltage grade, traditional relay protection scheme cannot meet the requirement of half wave-length AC transmission (HWACT). Considering distributed parameter characteristic of half wave-length AC transmission line, by use of the characteristic equation of uniform transmission line and integrating with symmetrical component, the fault characteristics of HWACT line inside and outside the protction zone are theoretically analyzed, and simulation results show that the results from theoretical derivation basically conform with actual conditions. According to fault characteristics of HWACT line, a new Bergeron model based current differential protection strategy suit to HWACT line is proposed and PSCAD platform based time-domain simulation experiments for the proposed protection strategy are performed. Experiment results show that when various kinds of short-circuit faults occur inside the protection zone, the amplitudes of different currents at both sides of the position where fault occurs are far bigger than those of short-circuit faults occur outside the protection zone, thus the current differential protection for HWACT line can act correctly.关键词
半波长交流输电/贝瑞隆模型/继电保护/电流差动保护Key words
half wave-length AC transmission/Bergeron model/relay protection/cusrent differential protection分类
信息技术与安全科学引用本文复制引用
肖仕武,程艳杰,王亚..基于贝瑞隆模型的半波长交流输电线路电流差动保护原理[J].电网技术,2011,35(9):46-50,5.
