Optimization of energy management strategy for marine multi-stack fuel cell hybrid power system
In order to study the energy management strategy(EMS)of a marine hybrid power system with a multi-stack fuel cell system(MFCS)and a lithium battery as the power source,the paper proposes a multilevel power allocation strategy based on the particle swarm optimization(PSO)algorithm.Firstly,the power demanded by MFCS and lithium battery was analyzed using one-level EMS,and secondly,a two-level MFCS cooperative control strategy with the total efficiency of MFCS as the optimization objective was constructed to optimize the power allocation among fuel cells.Finally,based on the typical working conditions of fuel cell hybrid ships,the power distribution,equivalent hydrogen consumption and fuel cell system efficiency,and loading and unloading rates of the ship hybrid system were analyzed.The results show that compared with the equivalent hydrogen consumption minimization strategy(ECMS),the hydrogen consumption of fuel cell 1 and fuel cell 2 under this strategy is reduced by 15％and 23％,respectively,and the total efficiency of the MFCS is improved by 1.15％,and the power change fluctuation of the fuel cell is smaller.This study contributes to improving the economy and durability of fuel cells in hybrid power systems.
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维普
