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An Online Faulty Sub‐Feeder Identification Method for the NUGS Single‐Phase Earth Fault Based on the Faulty Phase Current Feature Recognition
Author(s) -
Lin Xiangning,
Liu Peng,
Lyu Ran,
Li Zhengtian,
Weng Hanli,
Huang Jingguang,
Tong Ning
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22518
Subject(s) - ground , fault (geology) , identification (biology) , engineering , transient (computer programming) , reliability (semiconductor) , feature (linguistics) , power (physics) , automation , symmetrical components , phase (matter) , computer science , electronic engineering , reliability engineering , control engineering , electrical engineering , voltage , linguistics , botany , physics , philosophy , quantum mechanics , seismology , biology , geology , mechanical engineering , chemistry , organic chemistry , transformer , operating system
Single‐phase earthing is a type of fault that occurs frequently in a distribution network. To improve the reliability of the power supply, neutral un‐effectively grounded system (NUGS) is adopted in many countries. However, it will lead to the difficulty of identification of the faulted components. Existing faulty sub‐feeder identification methods place severe limit on field feasibility in various aspects when dealing with this problem. In this paper, an online single‐phase earth faulty sub‐feeder identification method based on the faulty phase current feature recognition is introduced and assessed according to the universal distribution characteristics of the high‐frequency transient components. In comparison with existing location methods, the proposed method is independent of zero‐sequence current measurement and has the natural faulty feeder selection capability. Besides, it can be implemented economically by virtue of the existing distribution automation system in the NUGS. The effectiveness of the proposed method under various fault conditions is verified by Power Systems Computer Aided Design/Electromagnetic Transients including DC (PSCAD/EMTDC) simulation and comparison studies. © 2017 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.