Excitation controller design of a synchronous machine using discrete optimal multirate techniques

An optimal control strategy based on Two-Point-Multirate Controllers (TPMRCs) is used to design a desirable excitation controller of a hydro generator system, in order to enhance its dynamic stability characteristics. In the TPMRCs based scheme, the control is constrained to a certain piecewise cons...

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Bibliographic Details
Published in:ARPN journal of engineering and applied sciences 2012-12, Vol.7 (12)
Main Authors: Bandekas, D V, Boglou, A K, Pappas, D I
Format: Article
Language:English
Subjects:
Constants
Controllers
Design engineering
Dynamical systems
Excitation
Generators
Sampling
Strategy
Online Access:Get full text
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Summary:An optimal control strategy based on Two-Point-Multirate Controllers (TPMRCs) is used to design a desirable excitation controller of a hydro generator system, in order to enhance its dynamic stability characteristics. In the TPMRCs based scheme, the control is constrained to a certain piecewise constant signal, while each of the controlled plant outputs is detected many times over a fundamental sampling period . On the basis on this strategy, the original problem is reduced to an associate discrete-time linear quadratic (LQ) regulation problem for the performance index with cross product terms, for which a fictitious static state feedback controller is needed to be computed. Simulation results for the actual 160 MVA synchronous generator with conventional exciter supplying line to an infinite grid show the effectiveness of the proposed method which has a quite satisfactory performance.
ISSN:1819-6608
1819-6608