介绍了自动控制系统中PID调节的原理、特点及各参数的含义,应用PID调节的良好控制特性对水电解制氢系统中的系统压力、液位、电解槽温度三个重要的控制对象进行准确控制,以保证制氢装置的稳定运行。 The principle, characteristics and meanings of each parameter of PID control in automatic control system are introduced. Three important control objects of system pressure, liquid level and electrolytic cell temperature in water electrolysis hydrogen production system are accurately controlled by the good control characteristics of PID regulation Control, to ensure the stable operation of hydrogen plant.