电力系统保护与控制2024，Vol.52Issue(9)：59-69,11.DOI:10.19783/j.cnki.pspc.231451
基于信号频谱特性的配电网故障行波检测方法
A fault traveling wave detection method based on signal spectral characteristics for a distribution network
摘要
Abstract
There is a problem in that the characteristics of weak fault signals are not obvious when there is interference on the distribution network.This makes it difficult for traveling wave acquisition equipment to effectively detect the fault traveling wave signals.Thus a method of fault traveling wave detection based on signal spectral characteristics is proposed.By analyzing the transmission characteristics and frequency characteristics of the fault traveling wave in distribution networks,a start-up criterion is established based on the waveform incremental ratio.It can preprocess the sampling data of the equipment,and reduce the false start-up of the traveling wave equipment.Then,the robust local mean decomposition(RLMD)method is used to process the sampling data,filter out the interference signal during the sampling process,and reduce the influence of the noise signal.Finally,given that it is a characteristic of the traveling wave that the low-frequency content attenuates less but the high-frequency content attenuates faster,an identification criterion is established to identify the fault traveling wave signals.Simulations show that the proposed method can effectively detect the fault traveling wave signals during weak faults.关键词
配电网/故障行波检测/RLMD/多分支线路Key words
distribution network/fault traveling wave detection/RLMD/multi-branches引用本文复制引用
刘丰,谢李为,蔡军,喻锟,王有鹏,曾祥君,唐欣..基于信号频谱特性的配电网故障行波检测方法[J].电力系统保护与控制,2024,52(9):59-69,11.基金项目
This work is supported by the National Natural Science Foundation of China(No.U22B20113). 国家自然科学基金项目资助(U22B20113) （No.U22B20113）
湖南省自然科学基金项目资助(2021JJ30729) （2021JJ30729）
