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Electric Power Components and Systems

Article . 2002 . Peer-reviewed

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Electric Power Components and Systems

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Analysis of Synchronous Reactances as a Function of Airgap MMF

descriptionPublicationkeyboard_double_arrow_right Article , Journal 01 Apr 2002Publisher:Informa UK LimitedJournal:Electric Power Components and Systems, volume 30, pages 345-359 (issn: 1532-5008, eissn: 1532-5016,

Authors: M. A. Arjona Lopez; D. C. Macdonald;

doi: 10.1080/15325000252887985

Analysis of Synchronous Reactances as a Function of Airgap MMF

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Abstract

Saturation modeling in synchronous machines normally involves assumptions in order to formulate proper mathematical models. A problem exists in the characterization of saturated synchronous reactances when they are represented as a function of total airgap ampere-turns. This paper presents a finite element numerical analysis of this saturation representation, and it is shown that it does not hold in all operating conditions. A steady-state model to predict field-current and load angle is presented. It is based on the use of d-q mmf components. Two large turbo-generators of 13.8 kV, 150 MVA and 22 kV, 588 MVA are studied.

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