燃料电池混合动力系统设计与控制研究

Design and Control Research of Fuel Cell Hybrid Power System

为实现拖拉机全局功率分配最优,同时进一步提高系统燃料经济性,本文基于燃料电池/锂电池/超级电容混动力拖拉机,设计一种基于外部能效最大化的能量管理策略。该策略旨在降低系统实时氢耗的同时最大化外部能源输出,以减小负载随机性对燃料电池输出功率的影响。在拖拉机典型犁耕工况下,与状态机策略和等效氢耗最小策略进行仿真对比,结果表明,本文所提策略满足给定犁耕工况的功率需求,且相较于两种传统策略系统更充分地发挥了辅助能源的性能特点;减轻了燃料电池负担,提高了燃料电池耐久性;氢耗量分别降低了11.03 g和16.54 g,提高了混合动力系统整体经济性。

To achieve optimal global power allocation for tractors and further improve system fuel economy,this paper designs an energy management strategy based on maximizing external energy efficiency for fuel cell/lithium battery/supercapacitor hybrid tractors.This strategy aims to reduce real-time hydrogen consumption of the system while maximizing external energy output to minimize the impact of load randomness on fuel cell output power.Under typical plowing conditions of tractors,simulation comparisons were made with the state machine strategy and the equivalent hydrogen consumption minimization strategy.The results showed that the proposed strategy meets the power requirements of the given plowing conditions and fully utilizes the performance characteristics of auxiliary energy compared to the two traditional strategy systems;Reduced the burden on fuel cells and improved their durability;The hydrogen consumption has been reduced by 11.03 g and 16.54 g respectively,improving the overall economy of the hybrid power system.