Parameter Identification and Extended State Observer-Based Predictive Control for Single-Phase Inverter

The single-phase inverter-based circuit breaker test system has the advantages of fast current response speed and simple structure. In this work, the deadbeat model predictive control (DMPC) combined with parameter identification and extended state observer (ESO) is proposed for the output current control of the single-phase inverter. With merits of fast dynamic response speed, the DMPC is designed to control the output current of the multi-magnetic circuit transformer. However, the disturbances caused by the varying load impedance and model parameters will affect the control performance of DMPC. Therefore, an identification method is proposed to extract the parameters to improve the regulation accuracy of DMPC. Furthermore, the ESO is proposed to estimate and compensate the model mismatches. Finally, the control accuracy and output current response speed are improved by using the composite controller. The robustness against the varying load impedance and model mismatches of the proposed control strategy are verified by simulations and experimental results.