TY - JOUR
T1 - Detrimental effects of capacitance on high-resistance-grounded mine distribution systems
AU - Sottile, Joseph
AU - Gnapragasam, Steve J.
AU - Novak, Thomas
AU - Kohler, Jeffrey L.
N1 - Funding Information:
Paper PID-06-03, presented at the 2005 Industry Applications Society Annual Meeting, Hong Kong, October 2–6, and approved for publication in the IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS by the Mining Industry Committee of the IEEE Industry Applications Society. Manuscript submitted for review October 15, 2005 and released for publication June 3, 2006. This work was supported by the National Institute for Occupational Safety and Health (NIOSH), Pittsburgh Research Laboratory, under Contract 200-2002-000589, Reduction of Mining Electrical Hazards Through Improved Engineering Controls, with Dr. J. L. Kohler as the Technical Project Officer.
PY - 2006/9
Y1 - 2006/9
N2 - Modern underground coal mines can be very large, having a total connected load in excess of 15 000 hp. These mines generally have many miles of high-power conveyor belts and 15 or more miles of high-voltage power cables at distribution voltages of 12.47, 13.2, 13.8, or 14.4 kV. The shielded cables used in mine power distribution systems have a significant level of capacitance, on the order of 110 pF/ft. This level of capacitance, in an extensive power distribution system at today's voltage levels, can cause significant charging currents during a ground fault. This paper addresses the potential detrimental effects of capacitance charging currents during line-to-ground faults in mine power distribution systems. A representative mine power system is modeled, and simulations with faults at various locations are conducted to evaluate the effects of this capacitance on the level of fault current and relay selectivity. This paper also includes results of capacitance measurements made on mine power feeder cables used to validate the simulation model.
AB - Modern underground coal mines can be very large, having a total connected load in excess of 15 000 hp. These mines generally have many miles of high-power conveyor belts and 15 or more miles of high-voltage power cables at distribution voltages of 12.47, 13.2, 13.8, or 14.4 kV. The shielded cables used in mine power distribution systems have a significant level of capacitance, on the order of 110 pF/ft. This level of capacitance, in an extensive power distribution system at today's voltage levels, can cause significant charging currents during a ground fault. This paper addresses the potential detrimental effects of capacitance charging currents during line-to-ground faults in mine power distribution systems. A representative mine power system is modeled, and simulations with faults at various locations are conducted to evaluate the effects of this capacitance on the level of fault current and relay selectivity. This paper also includes results of capacitance measurements made on mine power feeder cables used to validate the simulation model.
UR - http://www.scopus.com/inward/record.url?scp=33749414564&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33749414564&partnerID=8YFLogxK
U2 - 10.1109/TIA.2006.880844
DO - 10.1109/TIA.2006.880844
M3 - Article
AN - SCOPUS:33749414564
SN - 0093-9994
VL - 42
SP - 1333
EP - 1339
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 5
ER -