Modular Multilevel Converters with Embedded Hybrid Energy Storage for Heavy-Duty Electric Transportation
Duration: 2022–2026
This project proposes the use of MMCCs (CHB, M2C and M3C) for large trucks and ships, with embedded batteries and fuel cells in their submodules. The project includes the operation of the back-to-back M2C and the M3C in stand-alone operation for ships, which means that the converter will drive the motor and power the onboard MVAC grid simultaneously.
Three solutions in combination are proposed to overcome the mentioned challenges: i) a three-port-converter (TPC) as submodule to interface fuel cells and batteries with voltage regulation and free of low-frequency oscillations; ii) a new optimal control method to inject circulating currents and common-mode voltages to reduce low-frequency oscillations; and iii) the use of sequential phase-shift model predictive control (PS-MPC) to obtain the fast dynamic of the MPC, and the frequency spectrum and scalability of the phase-shift PWM. The control of the motor is a Field Oriented Control, which is not covered in this proposal due to it has a classic approach and has been validated in MMCCs by simulations and experiments.
Principal Investigator: Javier Pereda
Co-Investigator: Félix Rojas
