An accurate method of neglecting dynamic saliency of synchronous machines in power electronic based systems

In this paper, motivations for neglecting dynamic saliency in detailed models of power electronic-based systems are presented. A new method of neglecting dynamic saliency is introduced in which approximate operational impedances are derived from original dynamic salient models. New machine parameter...

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Bibliographic Details
Published in:IEEE transactions on energy conversion 1999-12, Vol.14 (4), p.1177-1183
Main Authors: Pekarek, S.D., Walters, E.A.
Format: Article
Language:English
Subjects:
Aircraft propulsion
Approximation
Computer simulation
Dynamical systems
Dynamics
Electronics
Fittings
Impedance
Large-scale systems
Mathematical models
Power electronics
Power system analysis computing
Power system dynamics
Power system modeling
Power system transients
Student members
Synchronous machines
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Summary:In this paper, motivations for neglecting dynamic saliency in detailed models of power electronic-based systems are presented. A new method of neglecting dynamic saliency is introduced in which approximate operational impedances are derived from original dynamic salient models. New machine parameters are obtained by fitting to the approximate impedance curves, yielding model parameters in which dynamic saliency is eliminated. An example synchronous machine/converter system is provided that demonstrates the accuracy and increased simulation efficiency resulting from this technique. Therein, errors resulting from neglecting dynamic saliency are reduced from greater than 25% using traditional approximations to less than 0.6%. In addition, simulations using the new approximate model are greater than 48% faster than simulations based upon the original dynamic salient model.
ISSN:0885-8969
1558-0059
DOI:10.1109/60.815044