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In this paper an approach for the dynamic modelling of polymer electrolyte membrane fuel cells is presented. A mathematical formulation based on empirical equations is discussed and several features, exhibiting dynamic phenomena, are investigated. A generalized steady state fuel cell model is extended for the development of a method for dynamic electrochemical analysis. Energy balance and reactant flow dynamics are also explained through physical and empirical relationships. A well‐researched system (Ballard MK5‐E stack based PGS‐105B system) is considered in order to understand the operation of a practical fuel cell unit. Matlab‐SIMULINKTM has been used in simulating the models. The proposed method appears to be relatively simple and consequently requires less computation time. Simulation results are compared with available experimental findings and a good match has been observed.

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In this paper the dynamics of a polymer electrolyte membrane (PEM) fuel cell system and its associated power electronics are modelled and simulated. The fuel cell system model includes the dynamics of reactant flow, membrane resistance and charge, double layer capacitance as well as steady state equations. The DC Output of the 5 kW fuel cell stack is converted to 120 V, 60 Hz AC by a pulse width modulated inverter. The inverter output is held constant by a PID controller. Matlab‐Simulink™ and Power System Blockset (PSB) are used for the modelling and simulation of the fuel cell generator. The effects of load variation on output voltage, current, and fuel cell reactant flows are investigated. Simulation results indicate that variations in the systems electrical and physical parameters are within acceptable limits. Such a fuel cell generator could be used in grid connected and stand‐alone applications.