Nonlinear Adaptive Control of a Hybrid Fuel Cell Power System for Electric Vehicles – a Lyapunov Stability Based Approach. Issue 1 (17th November 2015)

• Record Type: Journal Article
• Authors: Tahri, Abdelouahad; El Fadil, Hassan; Giri, Fouad; Chaoui, Fatima‐Zahra
• Is Part Of: Asian journal of control. Volume 18:Issue 1(2016)
• Page Start: 166
• Page End: 177
• Publication Date: 2015-11-17
• Subjects: Fuel‐cell -- PWM -- power converters -- current regulation -- adaptive control -- nonlinear observer; Automatic control -- Periodicals; Control theory -- Periodicals; 629.805
• DOI: 10.1002/asjc.1231
• Languages: English
• ISSNs: 1561-8625

Abstract

Abstract: This study deals with the problem of controlling hybrid storage systems in electric vehicles. The storage system includes a DC‐to‐DC switched power converter of boost type associated with a fuel‐cell generator and a buck boost converter connected to a supercapacitor. Both converters operate according to the PWM principle and the whole system model is nonlinear and subject to parameter uncertainties. The control objective is threefold:1 ensuring a tight dc bus voltage regulation despite the uncertainties on the fuel cell (FC) voltage–current characteristic and on the load converter; (2) guaranteeing a perfect tracking of supercapacitor (SC) current to its reference despite the SC capacitance uncertainty;3 ensuring asymptotic stability of the closed‐loop system. The control problem is dealt with using a nonlinear adaptive controller designed by the Lyapunov approach. It is formally shown that the proposed controller meets all its control objectives. This theoretical achievement is confirmed by several simulations.