ROBUST COORDINATED TUNE OF PSS AND UPFC OUTPUT FEEDBACK CONTROLLERS USING CHAOTIC OPTIMIZATION ALGORITHM

This paper deals with the robust coordinated design of the power system stabilizer (PSS) and Unified Power Flow Controller (UPFC) with output feedback controllers in single-machine infinite-bus power system. The coordinated design problem of PSS and UPFC with output feedback controllers over a wide range of loading conditions and system configurations is formulated as an optimization problem which is solved by a Chaotic Optimization Algorithm (COA) based on Lozi map. Only local and available state variables are adopted as the input signals of each output feedback controller for the coordinated design. To ensure the robustness of the proposed coordinated tuning, the design process takes into account a wide range of operating conditions and system configurations. The effectiveness of the proposed method is demonstrated through nonlinear time-domain simulation and some performance indices studies under of over a wide range of loading conditions. The results of these studies show that the COA based output feedback controllers for coordinated design has an excellent capability in damping power system oscillations.

کلیدواژه ها:

Robust Coordination ، PSS ، UPFC ، ChaoticOptimization