Real-Time HIL Simulation of Modular Multilevel Matrix Converter Using Switching Function Model

The modular multilevel matrix converter (M3C) represents a direct AC/AC converter configuration with significant potential for high-power applications in the medium voltage range. Given the increased number of sub-modules and the control complexity, HIL testing is recommended to validate the operation of the converter and its control before deployment in the field. Additionally, the real-time simulation of such topology remains challenging because of the increased number of converter valves compared to a classical MMC. This paper presents a modeling approach based on an equivalent circuit method both efficient and precise, and designed for real-time simulation of the M3C. The proposed method can be used for HIL testing or accelerated simulation.