机械

为研究固体氧化物燃料电池（Solid Oxide Fuel Cell,SOFC）和微型燃气轮机（Micro Gas Turbine,MGT）的匹配过程并分析混合动力系统性能。搭建了包括SOFC、MGT等各部件的模型，基于顶层循环拓扑结构并通过参数匹配计算，建立了以氢气为燃料的SOFC/MGT混合动力系统模型，最后对所建立模型的稳态设计点和动态性能进行了分析。结果表明：(1)通过选用100k W功率的微型燃气轮机，所需的额定燃料电池堆功率为375.2 kW，与燃气轮机的功率比约为3.75:1；(2)在负载电流减少10%的情况下，燃料电池的功率会跟随下降，燃气轮机功率则会上升；在负载扭矩减少5%的情况下，燃料电池和燃气轮机功率均会下降，两种情况下系统总功率分别减少了4.9%和2.2%；(3)可以通过调节燃料电池堆单元数量来匹配选定功率下的燃气轮机。所建立的SOFC/MGT混合动力系统模型可为SOFC/MGT混合动力系统优化以及控制器设计提供基础。

To study the matching process between Solid Oxide Fuel Cell(SOFC) and Micro Gas Turbine(MGT) and analyze the performance of hybrid power systems. Built models of various components including SOFC and MGT. Based on the top-level cyclic topology structure and parameter matching calculation, a solid oxide fuel cell/gas turbine hybrid power system model using hydrogen as fuel was established. Finally, the steady-state design points and dynamic performance of the established model were analyzed. The results show that:(1) By selecting a micro gas turbine with a power of 100 kW, the required rated fuel cell stack power is 375.2 kW, which is approximately 3.75:1 compared to the power of the gas turbine.(2) When the load current decreases by 10%, the power of the fuel cell will decrease, while the power of the gas turbine will increase; When the load torque decreases by 5%, the power of both the fuel cell and gas turbine will decrease, and the total power of the system will decrease by 4.9% and 2.2% respectively in both cases.(3) The number of fuel cell stack units can be adjusted to match the gas turbine at the selected power, and the established SOFC/MGT hybrid power system model can provide a basis for optimizing SOFC/MGT hybrid power systems and designing controllers.