A Novel Hybrid Control Strategy based on Limit Cycle Stabilization for Flying Capacitors Multilevel Inverters

This paper addresses the limit cycle stabilization problem of multilevel Flying Capacitors Inverters (FCI). Firstly, the hybrid modeling and analysis of the converter dynamics are discussed for control design purposes. Then, hybrid automaton-based controller is investigated to address the fast-transient and high-efficiency compromise. The latter is translated as an optimal limit cycle stabilization problem. Finite-time stability of the desired limit cycle under the proposed hybrid controller is proved analytically. The presented simulation results confirm the theoretical claims and show the robustness of the controlled converter despite load disturbances and fast input variations.