电测与仪表2018，Vol.55Issue(6)：126-132,7.
基于二阶B样条小波模极大值的双极HVDC输电线路行波保护
Traveling wave protection of bipolar HVDC transmission lines based on second order B-spline wavelet modulus maximum
摘要
Abstract
A traveling wave protection of bipolar HVDC transmission line based on the second order B-spline wavelet modulus is proposed for the problem that the wavefront is difficult to capture or catch the high precision.Firstly,the transient current traveling wave information of both ends of the positive and negative rectifier inverter is obtained,and the fault pole is selected by calculating the correlation coefficient.Then,the second-order B-spline wavelet function is used to decompose the transient current traveling wave to obtain the modulus maxima.The inner and outer faults are judged by comparing the polarity of the current traveling wave and the maximum value of the wavelet model.Finally,the wave arrival time is determined according to the position of the modulus maxima to realize the fault distance measurement.PSCAD/EMTDC simulation results show that the proposed method can accurately identify the fault,ranging from high precision and difficult to be affected by factors such as transition resistance,fault type and fault distance.关键词
HVDC/小波模极大值/二阶B样条小波/故障测距/行波保护Key words
HVDV/wavelet modulus maxima/second order B-spline wavelet/fault location/traveling wave protection分类
信息技术与安全科学引用本文复制引用
游及第,邓祥力,姚媛媛..基于二阶B样条小波模极大值的双极HVDC输电线路行波保护[J].电测与仪表,2018,55(6):126-132,7.基金项目
国家自然科学基金面上项目(51777119) （51777119）
上海绿色能源并网工程技术研究中心(13DZ2251900) （13DZ2251900）
