American Journal of Applied Sciences

Design of Robust Decentralized Control for UPFC Controller Based on Structured Singular Value

Seyed Abbas Taher, Shahabeddin Akbari, Ali Abdolalipour and Reza Hematti

DOI : 10.3844/ajassp.2008.1269.1280

American Journal of Applied Sciences

Volume 5, Issue 10

Pages 1269-1280


New approach based on structured singular value (µ-synthesis) was 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 (MIMO) control system translated into a set of equivalent multi-input single-output (MISO) control system. Power systems similar to other industrial plants contain different kinds of uncertainties which should be considered in controller design procedure. For this reason, the idea of µ-synthesis technique being used for designing of UPFC controllers. The proposed µ-based controller had a decentralized scheme and advantage of a decentralized controller design reduction in the controller complexity and suitability for practical implementation. The effectiveness of the proposed control strategy evaluated under operating conditions on damping of low frequency oscillations in comparison with the classical controller to demonstrate its robust performance through nonlinear time simulation and some performance indices.


© 2008 Seyed Abbas Taher, Shahabeddin Akbari, Ali Abdolalipour and Reza Hematti. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.