HAIT Journal of Science and Engineering B
Volume 2, Issues 3-4, pp. 365-385
© 2005 Holon Academic Institute of Technology

 

Six-phase synchronous generator-rectifier parametric average value modeling considering operational modes

Juri Jatskevich1,* and Steven D. Pekarek2

1Department of Electrical and Computer Engineering,
University of British Columbia, Vancouver, BC V6T1Z4, Canada
2Department of Electrical and Computer Engineering,
Purdue University, West Lafayette, IN 47907, USA
*Corresponding author: jurij@ece.ubc.ca
Received 1 March 2005, accepted 10 July 2005

 

In a wide range of applications, a synchronous generator is directly connected to a converter which then feeds into a dc system. Derivation of accurate dynamic average value models (AVM) of a high-pulse-count generator-rectifier system depends upon operational modes. In this paper, a parametric approach to construct an AVM is developed for a system comprised of a 240Hz 6-phase synchronous generator-rectifier and an interphase transformer. The system exhibits several distinct operational modes for which the analytical derivation of the AVM is nearly intractable. The proposed method of generating the AVM avoids extensive analytical derivations-- although it does require an initial simulation of a detailed switched model of the system from which the rectifier/dc-link dynamics is found by numerical averaging. The results obtained from the developed AVMs are compared against detailed simulations, and for each considered mode an excellent agreement is demonstrated.

Keywords: Six phase synchronous generator, rectifier, operational mode, average value model, output impedance.

 

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