多堆燃料电池系统空气供应解耦控制器设计

Decoupling Controller Design for Air Supply Subsystem of MFCS System

大功率多堆燃料电池空气供应系统控制由储气罐控制、各堆进气流量节流阀控制以及进气压力背压阀控制构成。试验分析发现,在节流阀与背压阀控制之间存在较强耦合性。为此,基于多堆空气系统架构,采用相关技术来辨识其空气供应子系统在稳态工作点附近的局部线性化传递函数矩阵,并基于前馈解耦补偿技术,实现多堆空气系统储气罐、节流阀与背压阀在稳态工作点附近的相对独立控制。实验结果表明,该方法可实现多堆燃料电池空气供给系统的供给压力、进气流量与进气压力的解耦,具有良好的解耦效果和实用性能。

Air Supply Subsystem of multi-stack fuel cell system(MFCS)consists of air compressor,buffer tank,inlet flow throttle valve and backpressure valve,because of strong coupling between air mass flow and back pressure control in the air supply system,proposed decoupling control needed to be adopt in MFCS.Based on Air Supply Subsystem of MFCS,the transfer function matrix of the air supply subsystem for MFCS is identified near steady state point and then air flow and back pressure is decoupled via feed-forward compensation decoupling control technique.Experimental results show that the designed controller can really achieve the decoupling control of air flow and back pressure.