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

Version 2 2024-06-04, 04:45
Version 1 2014-10-28, 10:34
journal contribution
posted on 2024-06-04, 04:45 authored by J Hossain, A Mahmud, N Roy, H Pota
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

History

Journal

International journal of emerging electric power systems

Volume

14

Pagination

561-570

Location

Berlin, Germany

ISSN

1553-779X

Language

eng

Publication classification

C1.1 Refereed article in a scholarly journal

Copyright notice

2013, De Gruyter

Issue

6

Publisher

De Gruyter