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 modeled as a stochastic process, good agreement was obtained between experimental observations and mathematical predictions
Keywords :
DC transmission networks; arcs (electric); fault location; industrial power systems; mining; power system faults; railways; safety; DC power systems; DC trolley systems; coal mine power systems; electrical safety; fire hazard; frequency characteristics; ground fault detection; high-impedance arcing faults detection; legitimate load currents; stochastic process; Electrical fault detection; Fault detection; Fault diagnosis; Fires; Frequency; Hazards; Mathematical model; Power system faults; Predictive models; Switchgear;
Journal_Title :
Industry Applications, IEEE Transactions on
