Model-based diagnosis of proton exchange membrane water electrolysis cell: Bond graph based approach

Water electrolysis to produce hydrogen using Proton Exchange Membrane technology is a well-established technique. It is a real challenge to perform the diagnosis of such complex systems due to the involvement of multi-physics phenomena. In this paper, a Derivative Causal Bond Graph (DCBG) model-based diagnosis approach has been presented for PEM water electrolysis cell. Analytical Redundancy Relations(ARRs) are the core of the model-based diagnosis which are systematically generated from the DCBG model. The evaluation of these ARRs provides the residuals for monitoring various faults in the system. Linear Fractional Transformation Bond Graph is used to make the diagnostics robust against the uncertainties. Simulations are then performed to demonstrate the functionality of the developed diagnosis.Proton exchange membrane electrolysis, green hydrogen, linear fractional transformation, bond graph, diagnosis, analytical redundancy relations