Coordinated Power Control of Variable-Speed Diesel Generators and Lithium-Battery on a Hybrid Electric Boat

Mamadou Baïlo Camara (1) , Zhibin Zhou (2) , Brayima Dakyo (1)

1 GREAH - Groupe de Recherche en Electrotechnique et Automatique du Havre
2 IRENAV - Institut de Recherche de l'Ecole Navale

This paper presents coordinated power management strategies for a hybrid electric boat (HEB) based on dynamic load's power distribution approach using diesel generators and batteries. Two variable-speed diesel generator sets connecting to dc-bus via fully controlled rectifiers serve as the main power supply source; one lithium-battery pack linked to dc-bus through a bidirectional DC/DC converter serves as an auxiliary power supply source. The power requirement of the thrusters and other onboard equipment is represented by a load power profile. The main contribution of this paper is focused on the load power sharing of the HEB between the two variable-speed diesel generators and the lithium-battery pack, through the fluctuations extracted from load power and their assignation to the batteries. Another important issue is that when the total load demand is low, one of the diesel generator set will be switched off to improve the diesel-fuel efficiency. The output powers of the diesel generators and the batteries are controlled based on the power distribution strategy via the converters controlling. The performances of the proposed hybrid power system control are evaluated through simulations in MATALB/Simulink, and through reduced-scale experimental tests carried out for a specific driving cycle of the HEB.

Mots clés: Batteries; Generators; Boats; Engines; Hybrid power systems; Torque; Fluctuations; boats; DC-DC power convertors; diesel-electric generators; hybrid electric vehicles; power control; primary cells; diesel-fuel efficiency; load power sharing; load power profile; onboard equipment; power requirement; auxiliary power supply source; bidirectional DC/DC converter; lithium-battery pack; two variable-speed diesel generator sets; dynamic load power distribution approach; HEB; hybrid electric boat; variable-speed diesel generators; coordinated power control; AC/DC converter; hybrid electric boat (HEB); lithium battery; load sharing approach; variable-speed diesel generator

Domaines: Sciences de l'ingénieur [physics]; Energie électrique

Mamadou Baïlo Camara, Zhibin Zhou, Brayima Dakyo. Coordinated Power Control of Variable-Speed Diesel Generators and Lithium-Battery on a Hybrid Electric Boat. IEEE Transactions on Vehicular Technology, 2017, 66 (7), pp.5775-5784. ⟨10.1109/TVT.2016.2638878⟩. ⟨hal-02994341⟩