Impact of fuel cell on load modeling of distribution network

I With the increasing proportion of distributed generation in power grid, its impacts cannot be simply neglected. This paper studies the influences of fuel cell (FC) generation system upon the load modeling of distribution network, employing Matlab/Simulink tool and the measurement-based method. Through the analysis of dynamic operation characteristics in the transient state processes of FC generation system, FC generation system can be equivalent to a generalized dynamic load which consumes negative power, and can be described by second-order differential state equations. Then the synthetic load model of distribution network with FC generation system can be described by a generalized composite load model. Such model consists of induction motoring, paralleling with FC and static load. Finally, the validity and stability of parameters of the proposed generalized composite load model are testified by the analysis of simulation modeling of three typical operation states under different interference intensities.