Modeling and analysis of unsymmetrical transformer banks serving unbalanced loads
- New Mexico State Univ., Las Cruces, NM (United States). Coll. of Engineering
- WH Power Consultants, Las Cruces, NM (United States)
It is a common practice to serve combination three-phase and single-phase loads from an unsymmetrical three-phase transformer bank and a four-wire secondary. Depending upon the loads and company standards, nine different transformer connections can be considered along with either an open four wire or a quadraplex secondary. The selection of the proper connection and transformer ratings can be achieved by the correct modeling and analysis of a system consisting of an equivalent source, transformer bank, secondary, and loads. This paper develops the models for the nine transformer connections, the secondary, and the loads. A computer program has been written that allows the analysis of the system for loading and short-circuit studies. The paper includes several examples of different normal and abnormal operating conditions on some of the transformer connections.
- OSTI ID:
- 264218
- Journal Information:
- IEEE Transactions on Industry Applications, Vol. 32, Issue 3; Other Information: DN: Paper presented at the 1995 IEEE Rural Electric Power Conference, Nashville, TN (US), April 30--May 2, 1995; PBD: May-Jun 1996
- Country of Publication:
- United States
- Language:
- English
Similar Records
The analysis of an ungrounded Wye-Delta transformer bank serving an induction motor and single-phase lighting loads
Comments about the use of a Zig-Zag transformer to reduce the neutral current created by unbalanced nonlinear loads