Algebraic Observer for the Three Cell Multicellular Converter

This paper is devoted to design an algebraic state observer of three-cell multicellular converter for a predetermined switching sequence. The aim of this observer is to ensure a finite time convergence of the capacitor voltages in presence of measurement noises. For the converter, one differentiates robustly the load current to get the observable part. Then, one gathers the information from each mode and finally gets the capacitor voltages. The simulation results seemed to be satisfactory especially in terms of the efficiency and this confirms the theoretical synthesis.