Active damping for model predictive pulse pattern control

This paper pertains to medium voltage converters that are equipped with an LC resonant output filter. We provide a new active damping method, based on Linear Quadratic Regulator (LQR) theory, for a converter running with a Model Predictive Pulse Pattern Controller. The new active damping method relies on filtered versions of all measured signals to compute corrective actions that are combined with the flux error signal. These corrective actions of the flux error successfully attenuate the resonant behavior caused by the output filter. The proposed method is validated via extensive simulation results.