Application of Finite Control Set Model based Predictive method for power flow control using Unified Power Flow Controller

Abstract

Unified Power Flow Controller (UPFC) is one of the most flexible, versatile and complex FACTS devices which are employed in the transmission systems to control the power flowing through the transmission line. In this paper, the application of the Finite Control Set Model Predictive Controller (FCS-MPC) is investigated for the power flow control using UPFC. FCS-MPC controller has several advantages such as simplicity, fast dynamic response and efficient computational realization. The presented controller predicts the future behavior of the controlled variables and by minimizing a cost function the best control actions can be taken. The prediction of the controlled variables requires some elaboration time. Therefore, to compensate the delay of the digital control system, the prediction of the controlled variables is performed two steps forward. The cost function is also defined as the deviation of the controlled variables from their reference values. The performance of the presented control strategy is assessed on UPFC connected two bus system. Simulation results indicate the effectiveness of the presented control algorithm.