Efficient finite-element computation of synchronous machine transfer functions

Author

Escarela-Perez, Rafael ; Campero-Littlewood, Eduardo ; Niewierowicz, Tadeusz

Author_Institution

Departamento de Energia, Univ. Autonoma Metropolitana, Mexico City, Mexico

Volume

38

Issue

2

fYear

2002

fDate

3/1/2002 12:00:00 AM

Firstpage

1245

Lastpage

1248

Abstract

An efficient two-dimensional finite-element (FE) model is developed for the calculation of synchronous machine transfer functions. The numerical model uses two equivalent sinusoidally distributed stator windings substituting the actual three-phase machine by an equivalent two-phase one, leading to simplified FE simulations. Just two complex solutions per frequency are needed to obtain the three transfer functions that completely describe the two-port nature of the d axis network. A new FE-based method is proposed to accurately establish the rotor base quantities, allowing the calculated transfer functions to be in per-unit. Results are validated by comparing the performance of a two-axis equivalent circuit, derived from the FE transfer functions, with a reference transient FE program

Keywords

finite element analysis; frequency response; machine theory; rotors; stators; synchronous generators; transfer functions; d axis network; equivalent sinusoidally distributed stator windings; equivalent two-phase machine; frequency response; numerical model; rotor base quantities; synchronous generators; synchronous machine transfer functions; two-axis equivalent circuit; two-axis models; two-dimensional finite-element model; Equations; Finite element methods; Frequency; Iron; Power system modeling; Power system transients; Stator windings; Synchronous machines; Transfer functions; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.996318

Filename

996318