Title: Fuzzy logic and wavelet-based energy management strategy for fuel cell/ultracapacitor/battery hybrid vehicle with multiple-input DC/DC converter

Authors: Agustin Melero-Perez, Wenzhong Gao, J. Jesus Fernandez-Lozano

Addresses: Escuela Tecnica Superior de Ingenieros Industriales, Departamento de Ingenieria de Sistemas y Automatica, Universidad de Malaga, Campus de Teatinos, Calle Doctor Pedro Ortiz Ramos, s/n 29071 Malaga, Spain. ' Department of Electrical and Computer Engineering, University of Denver, Wesley Hall, 2135 E. Wesley Ave., Denver CO 8020, USA. ' Escuela Tecnica Superior de Ingenieros Industriales, Departamento de Ingenieria de Sistemas y Automatica, Universidad de Malaga, Campus de Teatinos, Calle Doctor Pedro Ortiz Ramos, s/n 29071 Malaga, Spain

Abstract: Fuel cell/ultracapacitor/battery hybrid power systems represent a promising architecture to satisfy the energy requirements for road vehicles. When the primary power source is a fuel cell, the objective of an energy management strategy (EMS) is to optimise the hydrogen consumption and fuel cell efficiency without compromising the performance of the overall system. In this study, a fuzzy logic controller together with a wavelet-transform algorithm (WTA) is proposed as EMS, which is a reasonable option to achieve an adequate solution of the problem since this supervisory control strategy can deal with a considerable amount of variables. Besides, a WTA is capable of separating the high and low frequency components of the load profile and help allocate them among the on-board energy sources. A simulation environment has been developed to test the EMS; it includes models for the power sources and energy storage devices, the power electronics and the vehicular power demand.

Keywords: energy management strategy; EMS; fuel cells; energy storage systems; ESS; batteries; ultracapacitors; fuzzy logic; FLC; wavelet transform; hybrid electric vehicles; HEV; multiple-input DC-DC converter; fuzzy control; supervisory control; simulation power electronics.

DOI: 10.1504/IJEHV.2011.042145

International Journal of Electric and Hybrid Vehicles, 2011 Vol.3 No.2, pp.152 - 175

Published online: 28 Aug 2011 *

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