Robust decentralized controller design for UPFC using μ-synthesis

Seyed Abbas Taher

doi:10.1016/j.cnsns.2009.08.006

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Robust decentralized controller design for UPFC using μ-synthesis

2010-08-01

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DOI：10.1016/j.cnsns.2009.08.006

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Abstract

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In this paper a new method based on structured singular Value (mu-synthesis) is proposed for the robust decentralized unified power flow controller (UPFC) design. To achieve decentralization, using the Schauder fixed point theorem the synthesis and analysis of multi-input multi-output (MIMC) control system is transformed into a set of equivalent multi-input single-output (MISO) control system. To cope with power system uncertainties p-synthesis technique is being used for designing of UPFC controllers. The proposed It-based controller has a decentralized scheme which has the advantage of reduction in the controller complexity and suitability for practical implementation. The effectiveness of the proposed control strategy on damping low frequency oscillations is evaluated under different operating conditions and compared with the conventional controller to demonstrate its robust performance through nonlinear simulation and some performance indices. (C) 2009 Elsevier B.V. All rights reserved.

Keywords:

Unified power flow controller

Decentralized control

mu-Synthesis

Flexible AC transmission systems (FACTS)

Robust control

Structured singular value