Title :
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
fDate :
3/1/2002 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
