TY  - JOUR
AU  - Taher, Seyed Abbas 
AU  - Akbari, Shahabeddin 
AU  - Abdolalipour, Ali 
AU  - Hematti, Reza 
PY  - 2008
TI  - Design of Robust Decentralized Control for UPFC Controller Based on Structured Singular Value 
JF  - American Journal of Applied Sciences
VL  - 5
IS  - 10
DO  - 10.3844/ajassp.2008.1269.1280
UR  - https://thescipub.com/abstract/ajassp.2008.1269.1280
AB  - 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.