Journal ArticleDOI
Ground-Fault Feeder Detection With Fault-Current and Fault-Resistance Measurement in Mine Power Systems
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TLDR
In this article, a fault-detection scheme with fault-current and fault-resistance measurement is presented, which is capable of detecting high-impedance ground faults.Abstract:
Many mine power systems operate with a floating neutral or are high-resistance grounded, and earth fault current is no more than a few tens of amperes. Traditional earth-fault-detection methods based on zero-sequence current have poor sensitivity in this case. For improvement, a fault-detection scheme with fault-current and fault-resistance measurement is presented in this paper, which is capable of detecting high-impedance ground faults. The scheme has been verified by electromagnetic-transient-program simulation, and a fault-detection prototype has been developed and tested in the laboratory. Results show that the scheme has high sensitivity and robustness.read more
Citations
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Journal ArticleDOI
Location of Single Phase to Ground Faults in Distribution Networks Based on Synchronous Transients Energy Analysis
TL;DR: A fault location method based on the analysis of the energy of the transient zero-sequence current in the selected frequency band (SFB) is proposed and the implementation scheme is illustrated with the distribution level phasor measurement units.
Journal ArticleDOI
Principle and Control Design of Active Ground-Fault Arc Suppression Device for Full Compensation of Ground Current
TL;DR: An active ground-fault arc suppression device that employs a topology based on a single-phase inverter to inject current into the neutral without any large-capacity reactors, and, thus, avoids the aforementioned overvoltage.
Journal ArticleDOI
Some Novel Techniques for Insulation Parameters Measurement and Petersen-Coil Control in Distribution Systems
TL;DR: The results of laboratory tests and distribution systems operation show that the novel Petersen-coil control techniques can satisfy the requirement of asymmetry distribution systems.
Journal ArticleDOI
A Novel Neutral Electromagnetic Hybrid Flexible Grounding Method in Distribution Networks
TL;DR: In this paper, a flexible neutral grounding method based on electromagnetic hybrid Petersen coil (EHPC), which consists of a magnetically controlled reactor and an active power compensator (APC), is proposed.
Journal ArticleDOI
Principle and Design of a Single-Phase Inverter-Based Grounding System for Neutral-to-Ground Voltage Compensation in Distribution Networks
TL;DR: An active grounding system based on a single-phase inverter and its control parameter design method is proposed to achieve the objective of neutral-to-ground voltage compensation and results prove the effectiveness and novelty of the proposed grounding system and control method.
References
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Journal ArticleDOI
A new deal for safety and quality on MV networks
TL;DR: The authors of this paper summarize the major possible alternatives and the reasons which may lead a utility to modify its original choices and the result of this analysis is the decision to change the neutral earthing of rural MV networks.
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Characteristics of earth faults in electrical distribution networks with high impedance earthing
Seppo Hänninen,Matti Lehtonen +1 more
TL;DR: In this article, an analysis and comparison of earth fault characteristics in the medium voltage distribution networks (20 kV) with high impedance earthing is presented, based on the evaluation of 476 real case data recordings, obtained from substations of distribution networks with an unearthed or a compensated neutral during the observation period of 3 years, 1994-1996.
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Location strategies and evaluation of detection algorithms for earth faults in compensated MV distribution systems
TL;DR: In this paper, three new algorithms for the detection of permanent, resistive single phase earth faults are discussed, and a novel fault location strategy for fault location in compensated systems with a complex radial structure is outlined.
Journal ArticleDOI
An overview of fault monitoring and diagnosis in mining equipment
TL;DR: In this paper, a survey of monitoring and diagnosis technologies that offer opportunities for improving equipment availability in mining is presented, including expert systems, model-based approaches, and neural nets.
Journal ArticleDOI
Arcing fault detection in underground distribution networks feasibility study
TL;DR: In this article, the feasibility of detecting arcing faults in underground secondary distribution cables in ducts was analyzed in time, frequency, and time-frequency domains, and the results of this analysis were analyzed to examine the feasibility and feasibility of developing a detection algorithm.