摘要
为解决质子交换膜燃料电池(proton exchange membrane fuel cell,PEMFC)发电系统空压机损耗与空气供应量之间的强耦合问题,并实现系统高效率可靠运行,提出一种基于安全运行区域约束的PEMFC系统效率优化控制方法(efficiency optimization control,EOCM)。该方法通过分析空压机固有特性和系统运行的边界条件得到PEMFC系统安全运行区域,基于此区域约束进行系统效率特性分析,得到PEMFC系统的最优效率运行轨迹,采用扰动估计滑模控制(disturbance estimation sliding mode control,DE-SMC)实现对系统效率的优化控制。其中安全运行区域可以避免空压机出现喘振现象,使系统工作在安全稳定区域内。在搭建的半实物平台上进行测试验证,结果表明:安全运行区域约束可以有效抑制过氧比的波动,保证系统稳定输出。在不同工况下,提出的EOCM可以较好地提升系统效率,降低超调量和调节时间,在参数扰动下仍能快速跟踪到最优效率,并保证PEMFC系统高效率、可靠运行。
In order to solve the problem of strong coupling between the loss of the air compressor and the air supply of the proton exchange membrane fuel cell(PEMFC)power generation system,and to achieve high-efficiency and reliable operation of the system,an efficiency optimization control method(EOCM)of PEMFC system based on safe operation area constraints was proposed.By analyzing the inherent characteristics of the air compressor and the boundary conditions of the system operation,the safe operation area of the PEMFC system was obtained.Based on the area constraint,the system efficiency characteristic analysis was performed to obtain the optimal efficiency operation trajectory of the PEMFC system.The disturbance estimation sliding mode control(DE-SMC)was adopted,which realized optimal control of system efficiency.The safe operation area can prevent the air compressor from surging and make the system work in a safe and stable area.Test verification was carried out on the built-in semi-physical platform,and the results show that the safe operation area restriction can effectively suppress the fluctuation of the oxygen excess ratio and ensure the stable output of the system.Under different working conditions,the proposed EOCM can improve system efficiency,reduce the overshoot and adjustment time,quickly track the optimal efficiency under parameter disturbances,and ensure the high efficiency and reliable operation of the PEMFC system.
作者
杨文
李奇
刘强
李朔
尹良震
陈维荣
YANG Wen;LI Qi;LIU Qiang;LI Shuo;YIN Liangzhen;CHEN Weirong(School of Electrical Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan Province,China)
出处
《中国电机工程学报》
EI
CSCD
北大核心
2022年第15期5576-5586,共11页
Proceedings of the CSEE
基金
国家自然科学基金项目(51977181,52077180)
霍英东教育基金会高等院校青年教师基金(171104)。
关键词
质子交换膜燃料电池
安全运行区域
效率优化控制
扰动估计滑模控制
过氧比
proton exchange membrane fuel cell
safe operation area
efficiency optimization control
disturbance estimation sliding mode control
oxygen excess ratio
