NDLI: Hilbert-Transform-Based Transient/Intermittent Earth Fault Detection in Noneffectively Grounded Distribution Systems

Content Provider	IEEE Xplore Digital Library
Author	Tao Cui Xinzhou Dong Zhiqian Bo Juszczyk, A.
Copyright Year	1986
Abstract	Conventional relaying algorithms are mostly based on phasor computation. Since it is difficult to obtain accurate phasor results in fast transient situations, most of the feeder relays fail to correctly respond to transient/intermittent earth faults, which are, however, frequent fault cases in distribution systems. This paper presents a novel approach for fault detection and direction determination for these transient/intermittent faults. The basic idea is to extract the fault direction using the instantaneous power's direction. The instantaneous power is obtained by using Hilbert transform. The proposed direction element inherently utilizes the high-frequency components of the transient fault signals at a conventional sampling rate. Together with an intermittence detection algorithm, a scheme for transient/intermittent earth fault detection has been proposed. It has been implemented as a prototype relay. Electromagnetic Transients Program tests as well as physical model tests have proved the effectiveness of the proposed scheme.
Sponsorship	IEEE Power Engineering Society
Starting Page	143
Ending Page	151
Page Count	9
File Size	921236
File Format	PDF
ISSN	08858977
Volume Number	26
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Transient analysis Reactive power Circuit faults Fault detection Earth Transforms Relays transient fault Direction detection earth fault detection instantaneous power intermittent fault
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Electrical and Electronic Engineering

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