Comparison of MPC and conventional control methods for the stability enhancement of UPFC connected SMIB system

This paper addresses model predictive controller (MPC) as an effective solution for improving the oscillations in a single machine infinite bus (SMIB) power system connected with a Flexible AC Transmission System (FACTS) device, unified power flow controller (UPFC). UPFC is mainly used in the transmission systems which can control the power flow by controlling the voltage magnitude, phase angle and impedance. As a controller, MPC not only provides the optimal control inputs, but also predicts the system model outputs which enable it to reach the desired goal. So, model predictive unified power flow controller (MPUPFC), a combination of UPFC and MPC along with proper system model parameters can provide a satisfactory performance in damping out the system oscillations making the system stable. Simulation is done in Matrix Laboratory (MATLAB), where the response is shown for changes in state which is compared with conventional control strategies of Power System Stabilizer (PSS) and Proportional Integral (PI) controller.