广东电力2016，Vol.29Issue(9)：52-57,6.DOI:10.3969/j.issn.1007-290X.2016.09.011
基于故障行波过程的直流线路单端保护
Single-end Protection of DC Transmission Lines Based on Fault Travelling Wave Process
摘要
Abstract
This paper analyzes travelling wave process of internal and external faults of DC transmission lines and presents single-end protection principle based on fault travelling wave process by using initial and subsequent travelling wave compo-nents in the fault process. It uses wavelet transformation for multi-resolution analysis which is able to effectively extract characteristics of internal and external fault travelling wave. On the basis of PSCAD/EMTDC,simulating verification is car-ried out for the protection algorithm. Results indicate that this principle can correctly distinguish internal and external faults of DC lines and identify high resistance grounding faults. It can remedy the defect of low sensitivity of the existing principle under high resistance grounding faults.关键词
直流输电/线路保护/行波保护/故障行波过程/小波变换Key words
DC power transmission/line protection/travelling wave protection/fault travelling wave process/wavelet trans-formation分类
信息技术与安全科学引用本文复制引用
罗澍忻,董新洲..基于故障行波过程的直流线路单端保护[J].广东电力,2016,29(9):52-57,6.基金项目
国家自然科学基金重大国际(地区)合作研究项目(51120175001) （地区）
