Title :
New insight into the detection of high-impedance arcing faults on DC trolley systems
Author :
Li, Jincheng ; Kohler, Jeffery L.
Author_Institution :
Analog Devices Inc., Norwood, MA, USA
Abstract :
High-impedance arcing faults are difficult to detect with conventional switchgear, and the presence of these faults in coal mine power systems represents a significant fire hazard. Research was performed to identify plausible techniques that would discriminate between the high-impedance arcing faults and legitimate load currents on the DC trolley system. This paper briefly summarizes that effort, and focuses on the frequency characteristics of the arc current. After the arc was modelled as a stochastic process, good agreement was obtained between experimental observations and mathematical predictions
Keywords :
arcs (electric); coal; electric impedance; fault location; mineral processing industry; mining; railways; safety; DC trolley systems; coal mine power systems; fire hazard; frequency characteristics; high-impedance arcing faults; load currents; stochastic process; Electrical fault detection; Fault detection; Fault diagnosis; Fires; Frequency; Hazards; Mathematical model; Power system faults; Predictive models; Switchgear;
Conference_Titel :
Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-3544-9
DOI :
10.1109/IAS.1996.563922
