A Generalized Predictive control for T-type power inverters with output LC filter

In this paper a Model Predictive Control (MPC) strategy is proposed for a T-type power converter used for standalone applications. The proposal uses a Generalized Predictive control (GPC) strategy, a fast Space Vector Modulation (SVM) scheme and includes a dc-link capacitors voltage balancing approach. The GPC strategy proposed for the T-type converter involves developing a system of dynamic equations for the output LC filter and load. Then, they are transformed to a Controlled Auto-Regressive and Moving-Average (CARIMA) model in order to obtain a sequence of control signals, so that a cost function is optimized. A computationally efficient fast SVM is used to provide the reference output voltages. Additionally, a dc-link capacitor voltage balancing approach is included in order to ensure proper work of the T-Type power converter. The system performance is analyzed by means of simulation results.