A Faulty Feeder Detection Method using Parameter-Optimization Variational Mode Decomposition and Impedance Characteristics of Zero-Sequence Current in Resonant Earthed System

doi:10.23940/ijpe.20.12.p5.18881899

Int J Performability Eng ›› 2020, Vol. 16 ›› Issue (12): 1888-1899.doi: 10.23940/ijpe.20.12.p5.18881899

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A Faulty Feeder Detection Method using Parameter-Optimization Variational Mode Decomposition and Impedance Characteristics of Zero-Sequence Current in Resonant Earthed System

Shu Tian, Yao Xu^*, Qixiang Yang

School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo, 454000, China

Submitted on ; Revised on ; Accepted on
Contact: * Corresponding author. E-mail address: 211807010019@home.hpu.edu.cn
About author:
Shu Tian received her M.S degree from Hohai University, and she is currently a professor in the School of Electrical Engineering and Automation at Henan Polytechnic University. Her research interests include electric power system and automation and relay protection. Yao Xu is currently pursuing an M.S degree in the School of Electrical Engineering and Automation at Henan Polytechnic University. His research interests include power system and automation and relay protection. Qixiang Yang is currently pursuing an M.S degree in the School of Electrical Engineering and Automation at Henan Polytechnic University. His research interests include power system and automation and relay protection.
Supported by:
This work is supported by the National Natural Science Foundation of China (No. 61403127).

Abstract

Abstract: It is difficult to detect the faulty feeder when a single-phase-to-ground (SPG) fault occurs in the resonant earthed system due to the low amplitude of current, and different faulty conditions leading to different components of transient zero-sequence current (TZSC) make the detection much harder. A novel faulty feeder detection method based on the parameter-optimization variational mode decomposition (VMD) is proposed in this paper. Firstly, utilize the fruit fly optimization algorithm (FOA) to obtain the optimal parameter combination [K, α] of VMD for the fault components extracted accurately. Second, considering that low-frequency decaying DC components only exist in the faulty feeder, the modal energy of decaying DC components of each feeder are calculated for a preliminary judgment. Then, due to the amplitude and polarity of the high-frequency transient capacitive current are both different between the faulty and sound feeder, the correlation analysis of high-frequency components is utilized to reflect the mismatch of zero-sequence current waveform in high frequency band between faulty and sound feeder. Finally, the dual criterion combining modal energy of decaying DC components in low-frequency band and waveform similarity in high-frequency band is constituted. A large number of MATLAB/Simulink simulation results show the great effectiveness and reliability of this method at different fault conditions.

Key words: resonant earthed system, single-phase-to-ground fault, variational mode decomposition, fruit fly optimization algorithm, modal energy, correlation analysis

Shu Tian, Yao Xu, Qixiang Yang. A Faulty Feeder Detection Method using Parameter-Optimization Variational Mode Decomposition and Impedance Characteristics of Zero-Sequence Current in Resonant Earthed System [J]. Int J Performability Eng, 2020, 16(12): 1888-1899.

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A Faulty Feeder Detection Method using Parameter-Optimization Variational Mode Decomposition and Impedance Characteristics of Zero-Sequence Current in Resonant Earthed System

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