HIL Co-Simulation of Long-Horizon Finite Control Set Model Predictive Control for LCL Filtered Grid-Connected Inverter Using FPGA

This work discusses a Finite Control Set Model Predictive Control (FCS-MPC) with delay compensation approach using field-programmable gate array (FPGA). This study mainly focuses on the implementation of a two-step FCS-MPC strategy for a grid-tied inverter with LCL filter capable of injecting high quality current with minimal total harmonic distortion (THD). A detailed description of the proposed digital implementation is provided. The entire system is simulated through MATLAB®/Simulink®, and then implemented on Digilent BASYS 3 evaluation and development FPGA kit with Vivado 2017.2 and Xilinx system generator.

I. Introduction

The continued utilization of traditional electrical energy sources such as oil and coal poses a significant threat to the environment [1]. The current replenishment rates of these resources are insufficient to sustain indefinite energy generation in the face of population growth and environmental concerns [1]–[4]. Renewable energy holds the potential to be a viable alternative to conventional energy sources, as it is economically viable and environmentally friendly. In addition, renewable energy comes from natural processes that replenish themselves continuously. They can be used directly (photovoltaic, photochemical, and thermal technologies) or indirectly (bioenergy, hydro, and wind) [5].