电力系统及其自动化学报2018，Vol.30Issue(4)：16-21,6.DOI:10.3969/j.issn.1003-8930.2018.04.003
基于电流相关性分析的高压直流输电线路保护
Protection for High Voltage Direct Current Transmission Lines Based on Current Correlation
摘要
Abstract
Based on the analysis of the fault currents of high voltage direct current(HVDC)transmission lines,a new protection method is proposed using the correlation of two-terminal current.The changing directions of currents on the two terminals are opposite when internal faults occur,while those are the same when external faults occur.By compar?ing the correlation of the above phenomenon,the proposed method achieves a quick and accurate recognition of both in?ternal and external faults.This method does not require accurate time synchronization of protection devices on the two terminals of transmission lines,and the requirement of sampling frequency is relatively lower,which can be achieved under the hardware condition of HVDC control and protection system at present.It is reliable,practical and meets the requirements for HVDC line protection.Simulation results of PSCAD and MATLAB demonstrate the feasibility and ef?fectiveness of the proposed method.关键词
直流输电线路/故障电流/相关性/故障分析/继电保护Key words
DC transmission line/fault current/correlation/fault analysis/relay protection分类
信息技术与安全科学引用本文复制引用
彭涛,江亚群,黄纯..基于电流相关性分析的高压直流输电线路保护[J].电力系统及其自动化学报,2018,30(4):16-21,6.基金项目
国家自然科学基金资助项目(51677606) （51677606）
