This work presents the development of a nonlinear state observer to estimate the values of the different gas species concentration profiles in a Proton Exchange Membrane Fuel Cell (PEMFC) energy system. The selection of the estimated states is based on the functionality and performance of the observer. The implementation is based on the discretization of a PEMFC distributed 1+1D model. Forward and backwards discretization of the partial derivative equations is performed to take advantage of the boundary conditions of the problem. A second-order sliding-mode control super-twisting corrective input action is implemented to reduce the estimation error to zero in a finite amount of time. Simulation results are presented to show the performance of the observer to estimate the values of the states and to extract conclusions for future research work.



Author keywords

PEMFC, super-twisting, estimation

Scientific reference

J.A. Luna, A.P. Husar and M. Serra. State observers design for PEMFC systems, 1st Iberoamerican Congress on Hydrogen and Fuel Cells, 2014, Bellaterra, Spain.