Research On The Whole Process Model Of Fuel Cell Power System

In recent years, with a great potential and strong vitality, the wind power generation technology has become the major new strength in electric power industry of our country. Even so, we cannot ignore some problems existing in wind power technology, such as intermittent and uncontrollable of wind, which will directly affect the quality and reliability of power supply. Therefore, researching on the good performance, environmental friendly new large capacity energy storage device will become one of the hotspots. Among them, due to its excellent characteristics, the fuel cell has received the widespread concern. There are many kinds of fuel cells, among which proton exchange membrane fuel cell (PEMFC) is a priority consideration as a research object because of its advantages, such as, ambient start, no corrosion problems, long battery life, high current density, fast response ability, good stability, lower after-treatment cost and pollution-free, etc. Therefore, in this paper, on the assumption that the fuel gas is in the ideal state, taking PEMFC power generation system as the research object, which integrates the wind power generation, fuel cell, electrolytic cell, hydrogen-storage equipment and control section, and the whole process simulation model of fuel cell power generation system which includes hydrogen production, hydrogen storage, hydrogen using and power generation was built in detail. This model mainly contains gas flow rate unit, fuel cell unit, electrolytic cell unit, hydrogen storage unit and control unit in order to do a simulation research on the operation and response of the system. The results show that this model have good dynamic properties, relatively high response speed, and achieved stable voltage output of fuel cells through the control of fuel flow rate. In addition, in the modeling process, with the preparation and storage of fuel, the control of storage tanks valve opening, auxiliary equipment energy dissipation problems are considered, it is more suitable for the actual system.Hereafter, the effectiveness of the model was verified through connecting grid system. By using VSC technology the fuel cell system was connected to isolated system that contains wind turbine and was researched. The independent regulation of active power and reactive power were realized through the dq decoupling control; The actual operation condition was simulated by the way of decreasing load. This simulation results verify the effect of the fuel cell power generation system as energy storage device, and simulation proves the validity of the model.