Hybrid distributed generation units PEM fuel cell and microturbine

This paper presents the modeling of a hybrid fuel cell and micro turbine Distributed Generation (DG) plant. The fuel cell is connected to the power system through a DC/AC converter and is equipped with both voltage and power control loops. The micro turbine is also assumed to be equipped with both voltage control and generation (or frequency) control loops and is modeled using the d-q frame of reference. The interfacing of the micro turbine with the power system is achieved by transforming the micro turbine equations from the d-q frame of reference into system frame of reference. A simple DG plant with a hybrid fuel cell and micro turbine connected to a power grid is modeled and simulated using Matlab/Simulink software package. The dynamics of the DG plant with typical numerical values are plotted. These plots prove the accuracy of the presented model.