Mathematical morphology-based single phase-to-ground fault feeder selector for a resonant grounded distribution system
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作者:
Han, X. L.
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South China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R China
Han, X. L.
[1
]
Wu, Q. H.
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South China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R China
Wu, Q. H.
[1
]
Li, M. S.
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South China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R China
Li, M. S.
[1
]
Zhang, L. L.
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South China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R ChinaSouth China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R China
Zhang, L. L.
[1
]
机构:
[1] South China Univ Technol, Sch Elect Power Engn, Guangzhou 510006, Guangdong, Peoples R China
In this letter, we present a new single phase-to-ground fault feeder selector for a resonant grounded distribution system based on mathematical morphology. A combined morphological filter, which is the average of open-closing and close-opening, is employed to extract the transient component and decaying DC component from the zero-sequence current signal of each feeder. Afterward, two indices are introduced to measure these components and to distinguish the fault feeder from healthy feeders. Simulation studies are conducted using PSCAD/EMTDC, and the results verify the effectiveness of the proposed method. (c) 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.