Model Predictive Control Using Multi Virtual Voltage Vectors for a Two-Level Inverter in Electric Propulsion ship

Overview & Synopsis

In response to environmental concerns, electric propulsion ships are emerging as a key technology in the maritime industry. The inverter, which controls the propulsion motor, is a critical component in electric propulsion ships. The 2level voltage source inverter is widely implemented in small and medium-sized ships, but its output performance remains constrained due to limited number of voltage vectors. The proposed approach enables 2-level voltage source inverters to achieve multilevel invertercomparable performance by adding virtual voltage vectors. While it incurs increased computational burden, the proposed method achieves performance enhancement without computational burden through the application of pre-voltage selection. Experiments have shown improvements in output current THD and current error. The results demonstrate potential advantages for electric propulsion systems.