Simplified Finite Set Model Predictive Control Strategy of Grid-Connected Cascade H-Bridge Converter

Finite set model predictive control (fs-mpc) has become a promising control technology in power converter,because of the advantages of good dynamic response and accurate current tracking capability. in real-time control process,the conventional fs-mpc strategy requires more time for prediction and optimization. as a result,there will be a certain delay between sampling and output. in order to reduce the amount of calculation and overcome the adverse effect of the delay on the system performance,this paper presents a simplified fs-mpc method. firstly,adjacent levels method is used to reduce the amount of the calculation,and then two-step fs-mpc is adopted to compensate the calculation delay. the control strategy is validated by the simulation and experimental results of a grid-connected cascaded h-bridge converter. © 2016 jingang han et al.