电气技术2024，Vol.25Issue(7)：7-14,8.
基于多频带多特征融合的配电网单相接地故障选段方法
Single-phase-to-ground fault section location method of distribution network based on multi-frequency band and multi-feature fusion
肖文妍 1郭谋发 1林佳壕 1林骏捷1
作者信息
- 1. 福州大学电气工程与自动化学院,福州 350108
- 折叠
摘要
Abstract
Aiming at the existing distribution network single-phase-to-ground fault section location method,which has problems such as heavy communication burden,difficulty in threshold setting,and a single amount of fault features,a distribution network single-phase-to-ground fault section location method based on multi-frequency band and multi-feature fusion is proposed.Firstly,the wavelet packet transform is used to decompose and reconstruct the derivative of the zero-sequence voltage and the zero-sequence current of the first half of the industrial frequency cycle after the fault,respectively,to obtain the different frequency band components of the original waveform.Secondly,the volt-ampere characteristic eigenvectors and zero-sequence power cumulative sum are introduced as fault characteristics according to the polarity relationship,respectively.Finally,the feature bands are screened and the section location criterion based on the fusion of feature bands and fault features is constructed.Simulation experiments and field data validation results show that the proposed method can effectively realize the threshold-free in local section location of single-phase-to-ground fault.关键词
谐振接地系统/单相接地故障/故障选段/多频带多特征融合/免阈值/小波包变换Key words
resonant grounding system/single-phase-to-ground fault/fault section location/multi-frequency band and multi-feature fusion/threshold-free/wavelet packet transform引用本文复制引用
肖文妍,郭谋发,林佳壕,林骏捷..基于多频带多特征融合的配电网单相接地故障选段方法[J].电气技术,2024,25(7):7-14,8.
