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Enhancement of transient stability limit and voltage regulation with dynamic loads using robust excitation control

Hossain, Jahangir, Mahmud, Apel, Roy, Naruttam K. and Pota, Hemanshu R. 2013, Enhancement of transient stability limit and voltage regulation with dynamic loads using robust excitation control, International journal of emerging electric power systems, vol. 14, no. 6, pp. 561-570, doi: 10.1515/ijeeps-2013-0037.

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Title Enhancement of transient stability limit and voltage regulation with dynamic loads using robust excitation control
Author(s) Hossain, Jahangir
Mahmud, ApelORCID iD for Mahmud, Apel orcid.org/0000-0002-5302-5338
Roy, Naruttam K.
Pota, Hemanshu R.
Journal name International journal of emerging electric power systems
Volume number 14
Issue number 6
Start page 561
End page 570
Total pages 10
Publisher De Gruyter
Place of publication Berlin, Germany
Publication date 2013
ISSN 1553-779X
Keyword(s) voltage regulation
transient stability
robust control
uncertainty
nonlinearity
Summary In stressed power systems with large induction machine component, there exist undamped electromechanical modes and unstable montonic 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 guaruntees 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
Language eng
DOI 10.1515/ijeeps-2013-0037
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2013, De Gruyter
Persistent URL http://hdl.handle.net/10536/DRO/DU:30064456

Document type: Journal Article
Collection: School of Engineering
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