Journal of Electrical Engineering : Volume 16 / 2016 - Edition : 4

OPTIMAL SWITCHED FEEDBACK CONTROLLER DESIGN FOR THE SIMULTANEOUS COORDINATED DESIGN OF UPFC AND PSS IN POWER SYSTEM

Authors:
Yathisha L
S Patil Kulkarni
Domain:
power electronics devices
Abstract:
In this paper, an optimal switched feedback controller is designed which automatically finds a controller rather than having to make certain arbitrary choices as presented in conventional approch. This novel approach is presented for the simultaneous coordinated design of Unified power flow controller (UPFC) and Power System Stabilizer (PSS) in order to enhance the damping of oscillations in a Single Machine Infinite Bus (SMIB) power system. On the basis of the linearized Phillips- Herffron model, the coordinated design problem of PSS and UPFC is formulated as switching between two state feedback controller gains; one with respect to optimal controller and based on the location of closed loop eigenvalues from optimal control design another controller is designed using pole placement method. To ensure the betterness of simultaneous coordinated design of PSS & UPFC a preliminary control analysis is done by considering uncoordinated control of PSS & UPFC. The proposed feedback switching model presented here is tested on the modified SMIB linearised phillips heffron model of a power system using MATLAB/SIMULINK R platform.
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