Research on Air Supply System Control of PEMFC Based on LQR Control

Proton exchange membrane fuel cell (PEMFC) is composed of several coupled components with complex nonlinear characteristics. Coordinating the work of each component and effectively controlling the air supply system are key measures to improve the efficiency of the system. In order to control the air supply system of PEMFC, this paper explores the influence of different input parameters on the energy consumption efficiency of the system, quantifies the relationship between the variables, and studies the change law of power consumption efficiency and peroxide ratio of the system. After that, separate feed-forward, feed-forward + feedback and LQR control algorithms are used to control the optimal peroxide ratio respectively, and the algorithms are verified by Matlab/Simulink simulation. The results show that the LQR algorithm has the best dynamic response speed, which is shortened by 17.0% and 47.1% compared with the feed-forward + feedback control and separate feed-forward control systems. At the same time, the maximum control error of LQR algorithm is the smallest, which is 52.6% and 84.6% lower than that of feed-forward + feedback control and separate feed-forward control.