Research on Fault Line Selection in Distribution Network Based on Feature Band Wavelet Packet Analysis

doi:10.11985/2018.02.004

Abstract

Abstract:

Through the analysis of the transient process of single phase to ground fault in distribution network, a new method is presented to study fault line,which decomposes transient grounding capacitive current through the wavelet packet, the maximum energy band is extracted using the energy method, and the modulus maxima and signal singularity theory are used for the characteristic frequency band of each line , and finally which is the fault line is determined.The line selection principle are introduced as well as the line selection basis. Finally, the simulation experiments show that the proposed method is accurate, reliable and strongly adaptive, and it has an important application value.

Key words: Distribution network, fault line selection, feature band, wavelet packet, singularity detection

CLC Number:

TM726

Baozhu Ye,Chaoyu Xue,Huijuan Zhang,Ye Han,Boying Liu. Research on Fault Line Selection in Distribution Network Based on Feature Band Wavelet Packet Analysis[J]. Journal of Electrical Engineering, 2018, 13(2): 24-28.

Figures/Tables 7

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	正序阻抗	零序阻抗
R/(Ω/km)	0.51	0.68
L/(H/km)	0.823 7×10^-3	4.334 6×10^-3
C/(F/km)	69.84×10^-9	48.10×10^-9

故障线路	故障距离/km	故障初始角/(°)	选线结果
L1	5	270	L1
L2	7	80	L2
L3	4	18	L3
L3	13	90	L3
L4	16	140	L4
L5	12	30	L5
母线	0	0	母线
母线	0	150	母线

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