Advanced Model Predictive Control for Three-Phase Inverter Circuit Based on Disturbance Observer

In the new energy grid-connected system, in order to improve the output power quality, model predictive control is mostly used. However, this method has the problem of poor dynamic response when the circuit parameters change. An improved model predictive control (AdMPC-DOB) scheme based on disturbance observer is proposed in this paper. This scheme predicts the controlled current in two steps. At the same time, multiple PR regulators are used as feed-forward compensation of model predictive control (MPC) to eliminate the periodic error of the predicted current and improve the performance of the system. Suppression ability of fixed order harmonics. Considering the influence of circuit parameter variation and uncertain disturbance on the system, the inductance current disturbance observer (DOB) is used to precisely observe the input signal of MPC.