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This paper describes component sizing problem of a tram powered by a hybrid system based on fuel cell system (FCS) and a battery pack. The FCS delivers stationary power while the battery provides dynamic power. In this paper, we report on an optimization problem of powertrain parameters for a pre-defined driving cycle regarding fuel economy and system drivability. A global optimal power allocation strategy based on Pontryagin’s Minimal Principle (PMP) is exploited. Simulation results show that for a ‘‘typical tram cycle,’’ a battery capacity of 200 Ah and an FCS maximal net output power of 200 kW are optimal for the fuel economy of a fuel cell/battery tram. Keywords-fuel cell; hybrid tram; pontryagin’s minimal principle; power allocation

Power Component Sizing Based on Power Allocation Strategy for a Fuel Cell/Battery Hybrid Tram