Title :
Effect of three-winding transformer models on the analysis and protection of mine power systems
Author :
Oommen, Mathew P. ; Kohler, Jeffery L.
Author_Institution :
Dept. of Miner. Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The impact of accurate, three-winding transformer models in the analysis of mine power systems is examined. Though the disparity in voltage regulation is minimal, the enhanced representation of three-winding transformers seriously affects the results of both steady-state and first-cycle fault analysis. Fault current magnitudes could be underestimated by as much as 60% at strategic locations in the mine power system. This directly affects the choice and sizing of protective and coordination devices used in mine power systems. The effect of winding temperature is also important, but the values do not vary too much from values computed for correctly represented, four-bus, three winding transformer models
Keywords :
fault currents; mining; power systems; power transformers; thermal analysis; transformer windings; coordination devices; fault currents; first-cycle fault analysis; mine power systems; overcurrent protection; representation; steady state fault analysis; three-winding transformer models; voltage regulation; winding temperature; Circuit analysis computing; Equations; Impedance; Magnetic circuits; Performance analysis; Power system analysis computing; Power system modeling; Power system protection; Power system transients; Transient analysis;
Conference_Titel :
Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE
Conference_Location :
Toronto, Ont.
Print_ISBN :
0-7803-1462-X
DOI :
10.1109/IAS.1993.299221
