FPGA-based Model Predictive Control for High Frequency Variable Speed Generating Units

This paper deals with the design and implementation of high performance Model Predictive Control (MPC) strategy for stabilizing the output DC-link of an AC-DC converter in generating applications. The system is composed of a permanent magnets synchronous machine which is directly driven by a prime mover (i.e. internal combustion engine, gas turbine, etc..) and an AC-DC power converter. In such application, the control structure must be able to regulate the DC-link voltage as well as the dq-axes currents. Complete design of the Model Predictive Control strategy is described and tested, with reference to the internal reference generation and FPGA implementation. Being the system characterized by non-linear behaviors, the MPC approach is considered particularly suitable to overcome that issue.