Sizing and energy management of a hybrid locomotive based on flywheel and accumulators

Amine Jaafar (1) , Cossi Rockys Akli (1, 2) , Bruno Sareni (1) , Xavier Roboam (1) , A. Jeunesse (2)

1 LAPLACE-GENESYS - Groupe ENergie Electrique et SYStémique
2 SNCF

The French National Railways Company (SNCF) is interested in the design of a hybrid locomotive based on various storage devices (accumulator, flywheel, and ultracapacitor) and fed by a diesel generator. This paper particularly deals with the integration of a flywheel device as a storage element with a reduced-power diesel generator and accumulators on the hybrid locomotive. First, a power flow model of energy-storage elements (flywheel and accumulator) is developed to achieve the design of the whole traction system. Then, two energy-management strategies based on a frequency approach are proposed. The first strategy led us to a bad exploitation of the flywheel, whereas the second strategy provides an optimal sizing of the storage device. Finally, a comparative study of the proposed structure with a flywheel and the existing structure of the locomotive (diesel generator, accumulators, and ultracapacitors) is presented.

Mots clés: Energy management; Accumulator; Flywheel; Hybrid locomotive; Energy storage

Domaines: Energie électrique

Amine Jaafar, Cossi Rockys Akli, Bruno Sareni, Xavier Roboam, A. Jeunesse. Sizing and energy management of a hybrid locomotive based on flywheel and accumulators. IEEE Transactions on Vehicular Technology, 2009, 58 (8), pp.3947-3958. ⟨10.1109/TVT.2009.2027328⟩. ⟨hal-03789406v2⟩