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

الملخص EN

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.