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Sizing of a hybrid locomotive

Hybrid Electric Vehicle (HEV) is considered as the most promising solution to overcome energy crisis and air pollution. To insure an improvement of the vehicle performance and a decrease of pollutant emissions, the design and sizing of its powertrain components are necessary. In this paper, a sizing method based on an energy source frequency approach is applied to a hybrid locomotive developed by Alstom Transport. After determining the most restricting mission for the system, a sizing of secondary sources is proposed. To finish, an analysis of the obtained results informs about the diesel engine operations, the system weight and the volume constraints.