Fuzzy-PID control for temperature of proton exchange membrane fuel cells

Proton exchange membrane fuel cell(PEMFC) is the important research direction in the new power generation research field, but PEMFC temperature control influences the PEMFC performance greatly and is a complex process control problem. The focus of this paper is to study the suitable PEMFC temperature control strategy in order to meet the PEMFC operation request and control characteristic. On the basis of the experiment of 1-kilowatt level PEMFC, a PEMFC fuzzy-PID temperature control strategy is presented in the view of technology application. As a result of applying the multi-variable fuzzy logic theory and the fuzzy control theory, the fuzzy control system gets rid of the limits of the controlled object, which has the imprecision, uncertainty and partial truth, to achieve its tractability, robustness and low solution cost. And the output of the fuzzy controller can adjust and improve the PID control parameter dynamically. Moreover, it can constantly gathers the new control data to revise and improve the rule base to adapt the PEMFC running status and control change via the artificial data process. So it changes the PEMFC experience control to the PEMFC accuracy control, and effectively solves effectively solve the control problem caused by time-change, multi-disturbance, uncertainty, strong-coupling and nonlinear. The computer simulation and the experiment finally indicate that it is reasonable and effective, and satisfies the requirement of PEMFC temperature control characteristic.