A nonlinear geometric approach for energy management of a cascaded multilevel inverter integrating the battery

Multilevel inverters have recently emerged as a promising alternative for traction and stationary applications, offering advantages such as reduced losses and lower current distortion compared to conventional two-level inverters. To fully harness these benefits, suitable control strategies are required to drive the system towards desired operating states, along with a battery management system to preserve the health of the battery pack. In this work, we consider a cascaded multilevel inverter that directly integrates batteries as the energy source and propose a control technique based on a geometric approach. The method simultaneously achieves accurate machine control and balances the state of charge across modules, thereby mitigating non-uniform aging of the battery pack. The effectiveness of the proposed approach is validated through simulation studies.