Application of adaptive stepped PID control with in hydrogen fuel system

Hydrogen fuel cells are increasingly being applied in the field of new energy, and corresponding control systems have also been extensively studied. Overshoot is easy to occur during the control of hydrogen inlet pressure in fuel cell system, especially under the special conditions such as shutdown air supplementation and pressure maintenance leak detection. The excessive hydrogen pressure or pressure difference caused by overshoot may cause damage to the fuel cell stack.The hydrogen supply module control in the hydrogen circuit has the characteristics of nonlinear and complex mathematical model, and it is difficult to obtain better control effect with traditional PID control. This paper proposes an adaptive stepping PID hydrogen pressure control method, This paper establishes the pressure flow model of hydrogen circuit, and establishes the algorithm model of adaptive stepping PID and traditional PID in MATLAB/Simulink.The simulation results and experimental comparison prove that the adaptive stepping PID control has excellent control effects on complex systems with large lag, time-variant, and nonlinear characteristics, featuring fast response and the ability to suppress hydrogen pressure overshoot,which can improve the pressure control accuracy of the hydrogen circuit in the hydrogen fuel cell system with significant engineering significance and practical impact.