Research on a Faulty Line Selection Method Based on the Zero-Sequence Disturbance Power of Resonant Grounded Distribution Networks

Wenquan Shao, Jie Bai, Yuan Cheng, Zhihua Zhang and Ning Li
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Wenquan Shao: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Jie Bai: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Yuan Cheng: School of Electronics and Information, Xi’an Polytechnic University, Xi’an 710048, China
Zhihua Zhang: Electric Power Research Institute, State Grid Shaanxi Electric Power Company, Xi’an 710054, China
Ning Li: School of Automation and Information Engineering, Xi’an University of Technology, Xi’an 710048, China

Energies, 2019, vol. 12, issue 5, 1-18

Abstract: For fast and accurate faulty line selection (FLS) in single phase-to-ground (SPG) faults for resonant grounded distribution networks (RGDNs), this paper proposes a FLS method based on zero-sequence power characteristics. Through analysis of the zero-sequence current of SPG faults, it is found that the transient zero-sequence current in the faulty line contains abundant attenuated DC components, while that in the sound line is weak, which could be utilized as a technically practical way of judging faulty lines. Thus a FLS scheme using a transient zero-sequence DC component energy integral is put forward, which highlights the difference of the DC components in the faulty line and the sound line. A series of simulation test results indicate that the proposed scheme shows favorable performance under various SPG fault conditions, and should be helpful to improve the success rate of FLS significantly for RGDN in the future.

Keywords: single phase-to-ground fault; resonant grounded distribution network (RGDN); faulty line selection (FLS); DC component; power integral (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View complete reference list from CitEc
Citations: View citations in EconPapers (4)

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