A practical protective relay for down-conductor faults

Jeerings, D.I.; Linders, J.R.

doi:10.1109/61.131113

Cited by 53 publications

(14 citation statements)

References 3 publications

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“…Testing proved that the system is also applicable to three phase distribution circuits. On any application of the device, four issues must be considered: (1) signal attenuation along the neutral for propagation from the transmitter site to the receiver site, (2) selection of frequency to avoid sympathetic hipping, (3) selection of redundancy to avoid tripping due to other causes than an open phase conductor, and…”

Section: Laboratory and Field Testingmentioning

confidence: 99%

Open conductor detector system

Westrom

Meliopoulos

Cokkinides

et al. 1992

IEEE Trans. Power Delivery

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An open phase conductor detector system is described consisting of one or more transmitters and a receiver which communicate through the distribution line neutral conductor. The transmitter(s) detects the open phase conductor by monitoring the phase conductor voltage using redundant inputs. When an open phase conductor is detected, the transmitter injects a signal to the distribution line neutral conductor by means of a coupling current transformer (CT). The signal is frequency and duration coded. The receiver decodes the signal and generates a trip signal which may activate a breaker, a ground switch, or a recloser causing isolation of the distribution line with the open (downed) phase conductor. The system is presently implemented for single distribution lines. A prototype open conductor detector system has been constructed and field tested on a Georgia Power Company distribution system. conductors. Most of the faults occur on laterals rather than on the main three phase distribution line. Line crews have reported that about one-third to one-half of the downed conductor faults are not cleared by the installed protective devices. This means that approximately six percent of all distribution faults involve undetected downed conductors.

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Section: Laboratory and Field Testingmentioning

confidence: 99%

Open conductor detector system

Westrom

Meliopoulos

Cokkinides

et al. 1992

IEEE Trans. Power Delivery

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“…HIFs' detection has been a topic of interest since the 1970s. The HIF detection methods can be broadly classified into frequency domain algorithms, time domain algorithms, hybrid algorithms, and expert systems . Recognition of arc grounding fault is another research focus.…”

Section: Introductionmentioning

confidence: 99%

Type recognition of single‐phase‐to‐ground faults in nonsolidly earthed distribution networks‐architecture and method

Liang

Jin

Yongduan

et al. 2019

Int Trans Electr Energ Syst

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Summary Single‐phase‐to‐ground faults (SFs) could be characterized by multiple aspects, like time domain and frequency domain. There is no unified classification standard for such faults. Previous studies usually focused on detection and feeder‐selection techniques for SFs. This paper presents the classification architecture and recognition method for SF in nonsolidly earthed distribution networks. On the basis of the waveform data recorded by remote fault indicators and other recording devices, steady and transient characteristics of SFs are analyzed, and the faults are defined and classified into multiple levels. In each level, different kinds of SFs are recognized by quantization of time domain features, frequency domain features, and etc. It is rigorously tested through field data and artificial test data. Test results show that the proposed method could effectively recognize different kinds of SFs.

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“…Engineering efforts for the development of a reliable method for the detection of high impedance arc-type faults led during the last two decades to important progress in understanding the electrical characteristics of these faults and in the evaluation of several detection concepts [3]. Various techniques of fault detection encompass fractal techniques [4], expert systems [5], neural networks [6][7][8] and dominant harmonic vectors [9,10].…”

Section: Introductionmentioning

confidence: 99%

An Artificial intelligence approach to detection of high impedance fault

Kumar¹,

Saini²,

Saini³

2014

International Journal of Advanced Research in Computer and Comm

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This paper presents a new method to detect high impedance faults in radial distribution systems. Magnitudes of third and fifth harmonic components of voltages and currents are used as a feature vector for fault discrimination. The proposed methodology uses a back propagation neural network as a classifier for identifying high impedance arctype faults. The network learns from the data obtained from simulation of a simple radial system under different fault and system conditions. Compared to a feed-forward neural network, a properly tuned back propagation network gives quicker response.

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A practical protective relay for down-conductor faults

Cited by 53 publications

References 3 publications

Open conductor detector system

Open conductor detector system

Type recognition of single‐phase‐to‐ground faults in nonsolidly earthed distribution networks‐architecture and method

An Artificial intelligence approach to detection of high impedance fault

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