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Author
Title Centralized Control of Power System Stabilizers
URL
Publication Date
Date Accessioned
Degree PhD
Discipline/Department Electrical and Computer Engineering
Degree Level doctoral
University/Publisher Virginia Tech
Abstract This study takes advantage of wide area measurements to propose a centralized nonlinear controller that acts on power system stabilizers, to cooperatively increase the damping of problematic small signal oscillations all over the system. The structure based on decision trees results in a simple, efficient, and dependable methodology that imposes much less computational burden than other nonlinear design approaches, making it a promising candidate for actual implementation by utilities and system operators. Details are given to utilize existing stabilizers while causing minimum changes to the equipment, and warranting improvement or at least no detriment of current system behavior. This enables power system stabilizers to overcome their inherent limitation to act only on the basis of local measurements to damp a single target frequency. This study demonstrates the implications of this new input on mathematical models, and the control functionality that is made available by its incorporation to conventional stabilizers. In preparation of the case of study, a heuristic dynamic reduction methodology is introduced that preserves a physical equivalent model, and that can be interpreted by any commercial software package. The steps of this method are general, versatile, and of easy adaptation to any particular power system model, with the aggregated value of producing a physical model as final result, that makes the approach appealing for industry. The accuracy of the resulting reduced network has been demonstrated with the model of the Central American System.
Subjects/Keywords Centralized Control; Gain Scheduling; Phasor Measurement Unit (PMU); Power System Stabilizer (PSS); Wide Area Measurement Systems (WAMS); Dynamic Reduction; Decision Trees; Small Signal Analysis
Contributors Centeno, Virgilio A. (committeechair); Kohler, Werner E. (committee member); De La Reelopez, Jaime (committee member); Thorp, James S. (committee member); Stilwell, Daniel J. (committee member)
Rights This Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s), or the rights holder(s) may have licensed the work for use under certain conditions. For other uses you need to obtain permission from the rights holder(s).
Country of Publication us
Record ID handle:10919/51754
Repository vt
Date Retrieved
Date Indexed 2019-02-15
Issued Date 2014-10-09 00:00:00
Note [degree] Ph. D.;

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