TY - GEN
T1 - Detrimental effects of capacitance on high-resistance-grounded mine distribution systems
AU - Sottile, Joseph
AU - Gnapragasam, Steve
AU - Novak, Thomas
AU - Kohler, J. L.
PY - 2005
Y1 - 2005
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 110pF per 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. The 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 110pF per 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. The paper also includes results of capacitance measurements made on mine power feeder cables used to validate the simulation model.
KW - Charging current
KW - Ground fault
UR - https://www.scopus.com/pages/publications/33745876244
UR - https://www.scopus.com/pages/publications/33745876244#tab=citedBy
U2 - 10.1109/IAS.2005.1518376
DO - 10.1109/IAS.2005.1518376
M3 - Conference contribution
AN - SCOPUS:33745876244
SN - 0780392086
SN - 9780780392083
T3 - Conference Record - IAS Annual Meeting (IEEE Industry Applications Society)
SP - 650
EP - 656
BT - Conference Record of the 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting
T2 - 2005 IEEE Industry Applications Conference, 40th IAS Annual Meeting
Y2 - 2 October 2005 through 6 October 2005
ER -