Electrochemical Modeling and PID Control of PEMFC

The model of proton exchange membrane fuel cell(PEMFC) is hard to be used in the design of control system at present,so a electrochemical method is put forward to establish PEMFC mathematics model,and the PID algorithm is adopted to control the output voltage.Firstly,analyzing the operation mechanism within PEMFC, and adopting the electrochemical method to establish its mathematic model;then assuming under the situation that the external load current interferes,the operating temperature of PEMFC stabilizes in 80 ℃.And setting up the model of system under the environment of Matlab/simulink and simulating the dynamic change course of output voltage;using PID algorithm to control the inlet gas pressure of anode and cathode of stack to make the output voltage of PEMFC system reach the setting value.Simulation results show that this model can reflect the dynamic characteristic of power generation system,and PID algorithm can be used in the control system of PEMFC.