2019 | vol. 67 | nr. 1 | art. 4

Algebraic Observer Design for Switched Linear Systems applied to Multicellular Converters for estimating Capacitor Voltages

Kaouthar Haddadi, Noureddine Gazzam, Atallah Benalia
This paper addresses the algebraic observer design method for the estimation of the continuous state of switched linear systems while the existence of unobservable modes. This strategy is based on the recent robust differentiation technique. Taking into account the hybrid observability of the continuous state, the algebraic observer can reconstruct the states using the output measurement and their robust derivatives estimation. The proposed state observer provides better and fast estimation. To validate the design scheme, we apply the theoretical to estimate the floating voltages capacitors of the multicellular converters using only the load current measurement and the knowledge of the discrete sequence modes. Simulation results and comparisons with super twisting observer demonstrate the robustness and the effectiveness of the suggested state observer with and without converter’s parametric variations and output measurement noise.
Keywords: Switched linear systems, Observability analysis, Algebraic observer, Multicellular converter
To cite this article: Haddadi K., Gazzam N., Benalia A., “Algebraic observer design for switched linear systems applied to multicellular converters for estimating capacitor voltages”, in Electrotehnica, Electronica, Automatica (EEA), 2017, vol. 67, no. 1, pp. 28-34, ISSN 1582-5175.