Improved Steady State Behavior of Finite Control Set Model Predictive Control applied to a Flying Capacitor Converter

Abstract

Finite Control Set Model Predictive Control (FCSMPC) allows to deal with non-linearities of the system and obtain a fast dynamic response. Therelbre FCS-MPC is a good alternative to govern complex power converters or when fast transient operation is required. The main drawback of FCSMPC is the perliirmance obtained during the steady state, the main reason resides in the poor temporal resolution of FCS-MPC and the mismatch of the model parameters. This paper presents a new way to implement FCS-MPC to correct the mismatch in the model parameters and achieve a better performance in steady state. This is achieved through the incorporation of the past error in the action of the control, adding an additional term in the cost function with a variable weighting factor.