Air and hydrogen feeding control is a hot topic for the operation of proton exchange membrane (PEM) fuel cell system. However, there is little consideration for the cooperative control of the oxygen excess ratio, hydrogen excess ratio and the pressure balance between anode and cathode. This paper proposed an adaptive super-twisting (ASTW) based sliding mode nonlinear control to regulate air, hydrogen feeding, and pressure balance of PEM fuel cell system with ejector-driven recirculation. The target is to control the oxygen excess ratio, hydrogen excess ratio and the pressure difference on both sides of the membrane, to avoid the oxygen starvation and damage of the membrane. First, a nonlinear model of PEM fuel cell system with ejector-driven recirculation is developed, including fuel cells, ejector and auxiliary equipment. Then, an ASTW based sliding mode control is proposed to achieve the smoothing regulating actions and chattering rejection. The performance of the developed ASTW based sliding mode control strategy is verified through two simulation scenarios and compared with the conventional PID method and STW sliding mode control. Simulation results indicate that the developed control strategy can provide shorter regulation time (less than 5 s) and smaller overshoot (2.1 × 10⁴ Pa) of oxygen excess ratio, hydrogen excess ratio and pressure difference on both sides of the membrane than conventional PID controller. Moreover, better chattering rejection can be achieved during various load conditions compared with STW sliding mode control.

空气和氢气进料控制是质子交换膜 (PEM) 燃料电池系统运行的热门话题。但很少考虑氧过剩率、氢过剩率和阴阳极压力平衡的协同控制。本文提出了一种基于自适应超扭曲 (ASTW) 的滑模非线性控制，以调节具有喷射器驱动再循环的 PEM 燃料电池系统的空气、氢气供给和压力平衡。目标是控制氧过剩率、氢过剩率和膜两侧的压差，避免膜缺氧和损坏。首先，建立了带有喷射器驱动再循环的 PEM 燃料电池系统的非线性模型，包括燃料电池、喷射器和辅助设备。然后，提出了一种基于 ASTW 的滑模控制来实现平滑调节动作和抖动抑制。开发的基于 ASTW 的滑模控制策略的性能通过两个仿真场景进行验证，并与传统的 PID 方法和 STW 滑模控制进行比较。仿真结果表明，所开发的控制策略可以提供更短的调节时间（小于 5 s）和更小的超调（2.1 × 10⁴的氧过剩率，氢过剩率和压力差在膜比常规PID控制器的两侧帕）。此外，与 STW 滑模控制相比，在各种负载条件下可以实现更好的抖动抑制。