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International Journal of Emerging Electric Power Systems

Editor-in-Chief: Sidhu, Tarlochan

Ed. by Khaparde, S A / Rosolowski, Eugeniusz / Saha, Tapan K / Gao, Fei

CiteScore 2018: 0.86

SCImago Journal Rank (SJR) 2018: 0.220
Source Normalized Impact per Paper (SNIP) 2018: 0.430

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Volume 14, Issue 6


Enhancement of Transient Stability Limit and Voltage Regulation with Dynamic Loads Using Robust Excitation Control

Jahangir Hossain / Apel Mahmud / Naruttam K. Roy / Hemanshu R. Pota
Published Online: 2013-10-23 | DOI: https://doi.org/10.1515/ijeeps-2013-0037


In stressed power systems with large induction machine component, there exist undamped electromechanical modes and unstable monotonic voltage modes. This article proposes a sequential design of an excitation controller and a power system stabiliser (PSS) to stabilise the system. The operating region, with induction machines in stressed power systems, is often not captured using a linearisation around an operating point, and to alleviate this situation a robust controller is designed which guarantees stable operation in a large region of operation. A minimax linear quadratic Gaussian design is used for the design of the supplementary control to automatic voltage regulators, and a classical PSS structure is used to damp electromechanical oscillations. The novelty of this work is in proposing a method to capture the unmodelled nonlinear dynamics as uncertainty in the design of the robust controller. Tight bounds on the uncertainty are obtained using this method which enables high-performance controllers. An IEEE benchmark test system has been used to demonstrate the performance of the designed controller.

Keywords: voltage regulation; transient stability; robust control; uncertainty; nonlinearity


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About the article

Published Online: 2013-10-23

Citation Information: International Journal of Emerging Electric Power Systems, Volume 14, Issue 6, Pages 561–570, ISSN (Online) 1553-779X, ISSN (Print) 2194-5756, DOI: https://doi.org/10.1515/ijeeps-2013-0037.

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