Model Predictive Control for Paralleled Uninterruptible Power Supplies with an Additional Inverter Leg for Load-Side Neutral Connection

Uninterruptible Power Supplies (UPS) have been demonstrated to be the key technology in feeding either single- and three-phase loads a wide range of critical applications, such as high-tier datacenters medical facilities. To increase overall system power capacity resilience, UPS systems are usually connected parallel. When parallel connected, circulating current can rise, inhibiting correct operation. Moreover, having controlled load distribution is another fundamental requirement paralleled systems. However, strategies ensure these two topics not explored date for with load-side neutral connection. This paper proposes an innovative Finite Control Set Model Predictive (FCS-MPC) strategy that ensures elimination use additional inverter leg point Additionally, topology based on parallel-connected simultaneously supply proposed. Experimental results show effectiveness robustness proposed control techniques even when different types