Simplified three-phase transformer model for electromagnetic transient studies
- Univ. of British Columbia, Vancouver, British Columbia (Canada)
This paper presents a simplified high-frequency model for three-phase, two- and three-winding transformers. The model is based on the classical 60-Hz equivalent circuit, extended to high frequencies by the addition of the winding capacitances and the synthesis of the frequency-dependent short-circuit branch by an RLC equivalent network. By retaining the T-form of the classical model, it is possible to separate the frequency-dependent series branch from the constant-valued shunt capacitances. Since the short-circuit branch can be synthesized by a minimum-phase-shift rational approximation, the mathematical complications of fitting mutual impedance or admittance functions are avoided and the model is guaranteed to be numerically absolutely stable. Experimental tests were performed on actual power transformers to determine the parameters of the model. EMTP simulation results are also presented.
- OSTI ID:
- 136564
- Report Number(s):
- CONF-940702-; ISSN 0885-8977; TRN: IM9552%%106
- Journal Information:
- IEEE Transactions on Power Delivery, Vol. 10, Issue 3; Conference: 1994 Institute of Electrical and Electronic Engineers/Power Engineering Society (IEEE/PES) summer meeting, San Francisco, CA (United States), 24-28 Jul 1994; Other Information: PBD: Jul 1995
- Country of Publication:
- United States
- Language:
- English
Similar Records
A high frequency transformer model for the EMTP
Admittance–voltage profiling of Al{sub x}Ga{sub 1−x}N/GaN heterostructures: Frequency dependence of capacitance and conductance