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Temperature and Voltage Dynamic Control of PEMFC Stack Using MPC Method

Proton Exchange Membrane Fuel Cell (PEMFC) is a multi-parameter and strongly coupled complex system, efficient and smooth operation is beneficial to the efficiency and stability of PEMFC. In this paper, aiming at improve the temperature and voltage management in PEMFC, a stack model is established, and a PEMFC temperature and voltage dynamic management controller based on Model Predict Control method (MPC) is proposed. The working temperature and output voltage are controlled by the mass flow rates of cooling water and hydrogen gas, respectively. The performances of PEMFC under different controller including MPC and traditional PID controllers are analyzed. The results show that the MPC controller can remarkably reduce the response time and overshoots of temperature and voltage. The temperature overshoot of MPC controller is lower than 1.1 K, and the response time is less than traditional PID controllers. Moreover, with step current change, voltage overshoot of MPC controller is less than 0.6V which is better than other controllers.