Detrimental effects of capacitance on high-resistance-grounded mine distribution systems

Joseph Sottile; Steve J. Gnapragasam; Thomas Novak; Jeffrey L. Kohler

doi:10.1109/TIA.2006.880844

Detrimental effects of capacitance on high-resistance-grounded mine distribution systems

Joseph Sottile, Steve J. Gnapragasam, Thomas Novak, Jeffrey L. Kohler

Research output: Contribution to journal › Article › peer-review

9 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1333-1339
Number of pages	7
Journal	IEEE Transactions on Industry Applications
Volume	42
Issue number	5
DOIs	https://doi.org/10.1109/TIA.2006.880844
State	Published - Sep 2006

Bibliographical note

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.

Keywords

Charging current
Ground fault

ASJC Scopus subject areas

Control and Systems Engineering
Industrial and Manufacturing Engineering
Electrical and Electronic Engineering

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10.1109/TIA.2006.880844

Cite this

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title = "Detrimental effects of capacitance on high-resistance-grounded mine distribution systems",

abstract = "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.",

keywords = "Charging current, Ground fault",

author = "Joseph Sottile and Gnapragasam, {Steve J.} and Thomas Novak and Kohler, {Jeffrey L.}",

note = "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.",

year = "2006",

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language = "English",

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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.

KW - Charging current

KW - Ground fault

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Detrimental effects of capacitance on high-resistance-grounded mine distribution systems

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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