Advanced control of bidirectional three-phase BEV charger with V2X technology. (27th May 2020)

• Record Type: Journal Article
• Authors: Rachid, Aziz; Fadil, Hassan El; Lassioui, Abdellah; Giri, Fouad
• Is Part Of: International journal of modelling, identification and control. Volume 33:Number 4(2020)
• Page Start: 344
• Page End: 357
• Publication Date: 2020-05-27
• Subjects: bidirectional three-phase ac-dc converter -- bidirectional half-bridge dc-dc converter -- BEV charger -- reactive power compensation -- nonlinear output feedback control -- nonlinear observer -- V2X charger -- V2G -- G2V -- unity power factor -- dq transformation; Engineering -- Methodology -- Periodicals; Science -- Methodology -- Periodicals; 001.42
• Languages: English
• ISSNs: 1746-6172

Abstract

In this paper, the control of a bidirectional three-phase BEV charger with vehicle-to-grid functionality is addressed. The charger structure is composed of two bidirectional power converters: a three-phase ac-dc converter and a dc-dc converter associated to an electric vehicle battery. The control objectives are the following: i) estimation of the battery SOC; ii) unity power factor during grid-to-vehicle (G2V); iii) adjusting the reactive power injected into the power grid during vehicle-to-grid (V2G); iv) dc-bus voltage regulation; and v) ensuring and safeguarding the battery charging and discharging process. To this end and based on the system modelling into dq coordinates, a nonlinear controller is designed. The fact is that the battery SOC is not accessible to measurement. Hence, a nonlinear observer is designed to estimate all state variables on the battery-side. The performances of the proposed controller are highlighted using theoretical analysis and numerical simulations, which clearly illustrate that all control objectives are achieved.