A new active power controller in dual active bridge DC-DC converter with a minimum-current-point-tracking technique

Hebala, Osama M. and Aboushady, Ahmed A. and Ahmed, Khaled H. and Abdelsalam, Ibrahim and Burgess, Samuel J. (2020) A new active power controller in dual active bridge DC-DC converter with a minimum-current-point-tracking technique. IEEE Journal of Emerging and Selected Topics in Power Electronics. ISSN 2168-6777

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    Abstract

    This paper proposes a new controller for power regulation in dual active bridge (DAB) DC−DC converter based on a new scheme that tracks minimum RMS current to ensure minimum losses. The proposed controller is based on an implementation of perturb and observe (P&O) tracking method that enables minimum current point tracking (MCPT) at any desired level of active power transfer and DC voltage ratio. The P&O is embedded in a closed loop control scheme which simultaneously regulates active power in DAB converter. The nonlinear I-V characteristic of DAB presents the basis for this proposed controller and the rationale of using P&O algorithm. The proposed controller does not require complex non-linear converter modelling and is not circuit parameter dependent. Design procedure of the proposed controller is presented, and extensive simulation is carried out using MATLAB/Simulink to validate effectiveness of the proposed MCPT closed loop controller. An experimental prototype also substantiates the results achieved.