基于自适应滤波的燃料电池混合动力系统多能源管理策略研究

Study on multi-energy management strategy of fuel cell hybrid power system based on adaptive filtering

为了满足燃料电池汽车实际行驶中的高能量和高功率的要求,本文针对“燃料电池+蓄电池+超级电容”的多能源混合动力系统,比较了3种能量源的自身性能特征。为使燃料电池和蓄电池在大幅度瞬态变化的工况中遭受尽可能少的冲击,在基于滤波的能量管理策略的基础上,运用有限状态机控制滤波频率的自适应变化来保证实际运行工况下的最佳功率分配。仿真结果表明,该方法在保证系统动力性要求的同时,可以有效地减少高频变化的负载电流对燃料电池系统的冲击。

In order to meet the high energy and high power requirements of fuel cell vehicles in actual driving,this paper compares the performance characteristics of the 3 energy sources including proton exchange membrane fuel cell(PEMFC),the battery and the super capacitor(SC).To make fuel cells and batteries suffer as few shocks as possible from large transient changes of load current in practical operating conditions,energy management strategy based on adaptive filtering is presented.The finite state machine is used to control the adaptive change of the filtering frequency to ensure the optimal power distribution.The simulation results show that the proposed method can effectively reduce the impact of high-frequency changing load current on the fuel cell system while meeting the system power requirements.