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With the increasing depletion of fossil fuels and environmental pollution problems gradually intensifying , proton exchange membrane fuel cell (PEMFC) with its high energy conversion efficiency , environmental friendliness , becoming the 21st century's most promising new energy technologies. However, the fuel cell system is a multi -variable, strong coupling system, in order to fully understand its dynamic characteristics, need to be mathematical modeling and system simulation. And the fuel cell is unstable DC issued , must be equipped with power conversion device to adjust power output , get in line for DC or AC load requirements . The main problem for the above are as follows: 1 , in the study PEMFC electrochemical reaction mechanism , based on the quality of the law of conservation of energy and electrochemical dynamics as the theoretical basis for the establishment of a PEMFC mathematical model that can be used for experimental analysis and PEMFC structural design optimization. 2, the design of a PEMFC power conversion for low-voltage DC input , low cost, high efficiency power converter and the inverter by adding the auxiliary battery and pre- Boost circuit, to improve the conversion efficiency of the converter , to improve the the load characteristics of soft and disadvantages of poor dynamic performance . 3 , participated in the design of an integrated cell stack , humidifiers , flow system, temperature system \and an output current density of the fuel cell system operation of the status of established polarization curves of the stack . Experimental data and the model by comparison of the output data the validity of the model is verified . 4 , complete 2KW proton exchange membrane fuel cell power converter hardware set-up and commissioning, and used in the above experiment platform , has been stable DC output and AC meet the load requirements . Improve the output characteristics of the fuel cell for on-grid inverter provides the foundation .
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