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

fYear

1993

fDate

2-8 Oct 1993

Firstpage

2429

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Society Annual Meeting, 1993., Conference Record of the 1993 IEEE

Conference_Location

Toronto, Ont.

Print_ISBN

0-7803-1462-X

Type

conf

DOI

10.1109/IAS.1993.299221

Filename

299221