针对燃料电池电堆阴阳极压力平衡易受扰动影响的问题,提出适用于燃料电池氢气供应系统的二阶线性自抗扰控制方法。首先,基于燃料电池氢气供应系统的运行特性,建立面向控制的三阶氢气供应系统模型;接着,基于面向控制的三阶模型以及自抗扰理论,设计出适用于氢气供应系统的扩张状态观测器和线性状态误差反馈,在此基础上得出燃料电池电堆氢气供应系统压力跟踪的二阶线性自抗扰控制律。仿真结果表明：基于二阶线性自抗扰控制的氢气供应系统压力跟踪控制方法具有较优秀的响应速度、精度和抗扰能力,可实现对系统扰动项的实时估计与补偿以及燃料电池阳极压力对阴极压力的快速稳定跟踪。
Abstract
Aiming at the problem that the pressure balance of cathode and anode of fuel cell stack is easily disturbed, a second-order linear ADRC method for hydrogen supply system of fuel cell stack is proposed. Firstly, based on the operation characteristics of the fuel cell hydrogen supply system, a control oriented third-order hydrogen supply system model is established. Then, based on the control oriented third-order model and the auto disturbance rejection theory, an extended state observer and a linear state error feedback are designed for the hydrogen supply system. On this basis, a second-order linear auto disturbance rejection control law for the pressure tracking of the hydrogen supply system of the fuel cell stack is obtained. The simulation results show that the pressure tracking control method of hydrogen supply system based on second-order linear auto disturbance rejection control has excellent response speed, accuracy and anti-interference ability, and can realize real-time estimation and compensation of system disturbance terms, as well as fast and stable tracking of fuel cell anode pressure to cathode pressure.
关键词
燃料电池 /
压力控制 /
干扰抑制 /
氢气供应系统
Key words
fuel cell /
pressure control /
disturbance rejection /
hydrogen supply system
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