Analysis Of Fuel Cell Generation System Application

Fuel cells are an renewable energy supply that can be used in a wide range of applications and are ideal power supply applications for military communication arming. Fuel cell power generation technology has political, economical, and environmental and military advantages compared to traditional power resource. In this study, a few issues such as the principium, type and characteristics on fuel cells are introduced. A clear descriptions is presented that the history of the fuel cell and the statues on development and application abroad and in army. Some solutions about developing fuel cell technology for army use are presented. In this study, a dynamic electrochemical model is presented for representation, simulation and evaluation of performance of small size generation systems emphasizing particularly PEM fuel cell stacks. The simulation results of the model are used to state the output voltage, efficiency and power of FC's as a function of the actual load current. A perfect dynamic characteristics of load response outlined here should be taken into account during the application stage of FC generation systems. It is emphasized that the peak power should be accounted for while practical use. Depends on the level of interaction required between the fuel cell generation system and the army customer loads and presented power supplies, four operating modes of fuel cell generation system are proposed, which can be interconnected through the electrical interconnection system. Some strategies for responding to the different modes are presented, which will promise benefits from collection of individual power electronics. Some possible occasions and control rules are present in this study according to different operation modes. According to the types and traits of the signalman troop's mass sending station, a few electronic interface scenarios are put forward in responsible to the output character-ristics. This paper proposes a reduced level control technique for a cascaded multilevel dc-dc converter exploiting the V-I characteristics of fuel cells. With this control, the need for derating power semiconductors in fuel cell systems is eliminated. In addition to these, using the multilevel dc-dc converter also brings the advantages of modularity and increasing reliability and the utilization efficiency of fuel cell modules.