A multi-objective hierarchical energy management strategy for a distributed fuel-cell hybrid electric tracked vehicle

Abstract

This paper proposes a multi-stack fuel cell system (MFCS) for a distributed fuel cell hybrid electric tracked vehicle. The power distribution results of the DP algorithm under a series of power demand gradients are analyzed for the MFCS, and a basic energy management rule is extracted. To realize the consistency of each fuel cell system (FCS) aging in the MFCS and ensure the battery SOC fluctuates in a healthy range, the energy management rule extracted by the DP algorithm is reconstructed, and a Multi-Objective Hierarchical Energy Management Strategy (MOH-EMS) is proposed. Finally, the performance of the MOH-EMS is analyzed. The results show that the proposed EMS has good performance in terms of fuel economy, with only a 3.8 % and 4.4 % difference from the DP algorithm. The proposed EMS also achieves consistency in the aging of the FCS and improves the lifetime of the FCS.