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A Fuel Cell Assisted Single-Phase Multi-Port Uninterruptible Power Supply with Finite Control Set Model Predictive Controller

Increasing tendency in online businesses and work from home, attracted many businesses and individuals to consider single-phase uninterruptible power supplies (UPSs). However, low power UPSs are normally incapable of operating for extended time periods. In order to extend UPS ranges, researchers integrated auxiliary energy sources to UPSs. However, integrating auxiliary power sources require additional power electronics active and passive components. This will result in low power density and bulky UPSs. To overcome this issue, multi-port converters have been proposed as an alternative to employing multiple converters. Nevertheless, using multi-port converters require more advanced control methods. This paper proposes a novel multi-port UPS with a finite control set model predictive controller. Simulations are conducted to demonstrate the effectiveness of the proposed converter. The results show the load current THD of 0.77%, resilient transient response, and efficiencies up to 97.5% using SiC MOSFETs.