黄知超,钟奕,李彩林,李震,延红艳.一种基于谐波小波的单相接地故障选线方法[J].电测与仪表,2012,49(1):22-26. HUANG Zhi-chao , ZHONG Yi , LI Cai-lin , LI Zhen , YAN Hong-yan.A Method of Single Phase-to-ground Faulty Line Selection Based on Harmonic Wavelet[J].Electrical Measurement & Instrumentation,2012,49(1):22-26.
一种基于谐波小波的单相接地故障选线方法
A Method of Single Phase-to-ground Faulty Line Selection Based on Harmonic Wavelet
In order to improve the precision and robustness of single phase-to-ground faulty line selection method effectively in distribution network,the expression and transform algorithm of harmonic wavelet were analyzed in detail.Then,a single phase-to-ground faulty line selection method based on harmonic wavelet was presented.In the method,a resonant filter device which could charge line characteristic impedance was paralleled in transmission line export.Then transient current component of fault signal in feature frequency band was extracted.Finally,the faulty line selection method achieved faulty line and faulty phase selection through comparing transient current energy and energy attenuation coefficient in feature frequency band.The simulation test result showed that the method has high precision and reliability,at the same time it has high project application value.