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In order to investigate the output characteristic of proton exchange membrane fuel cell (PEMFC) based on the electrical empirical, a novel dynamic model of PEMFC has been developed with Matlab/Simulink, which is distinct from the models have previously been published. By using a fuel cell test system in Fuel Cell Application Centre in Temasek Polytechnic, the transient electrical response of PEMFC was conducted and analyzed under various operating conditions. A good match is found between simulation results and experimental data. The comprehensive results of simulation manifested that the model is effective and operational. This model will be very useful to optimize the structure design, improve the operation performance, and develop the real-time control system of PEMFC.Keywords--proton exchange membrane fuel cell, dynamic model, transient electrical response, dynamic simulation.

Coordinated decentralized controller for hybrid AC/DC system is proposed to attain fast stabilization against transient oscillations. A direct feedback law (DFL) for the generator excitation is found to linearize and decouple the hybrid system. Robust nonlinear control theory and linear matrix inequality (LMI) techniques are employed to design the guaranteed performance excitation controller. DC power modulation control is applied to enhance AC system stability. The proposed coordinated controller is decentralized and based on local measurements. Simulation tests and results show that the proposed controller is effective in enhancing power system transient stability despite operating conditions, fault locations and network parameters.