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Title: On-site safety evaluation for earth fault in mining power systems
Authors: Zeng, XJ
Li, KK
Chan, WL 
Yin, XG
Keywords: Condition monitoring
Industrial power systems
Maintenance engineering
Power distribution faults
Power system measurement
Power system security
Issue Date: 2001
Publisher: IEEE
Source: Conference record of the 2001 IEEE Industry Applications Conference : Thirty-Sixth IAS Annual Meeting : 30 September-4 October, 2001, Hyatt Regency Hotel, Chicago, Illinois, USA, v. 2, p. 1404-1410 How to cite?
Abstract: Many mining power systems utilize ineffectively grounded sources to restrict the residual current of single-phase earth fault in order to reduce outage and shock hazard. In practice, with the system expansion, topology changing and insulation aging, the potential residual current and zero sequence voltage for earth fault vary dynamically and some arcing earth faults can easily cause overvoltage and induce multiple faults. In order to improve the system safety, on-site condition monitoring, safety evaluation and preventive maintenance for an earth fault are proposed in this paper. Some techniques for on-line parameters-measurement based on the resonance-measurement principle are presented. Power system operation states are classified into normal secure state, alert state, incipient fault state and fault state. Some security enhancement methods (preventive action and remedial action) for each state are implemented. The prototype for safety evaluation has been developed and installed in industry power systems for several years.
ISBN: 0-7803-7114-3
ISSN: 0197-2618
DOI: 10.1109/IAS.2001.955718
Appears in Collections:Conference Paper

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