Generalized active power low controller for multi active bridge DC-DC converters with minimum-current-point-tracking algorithm

Hebala, Osama M. and Aboushady, Ahmed A. and Ahmed, Khaled and Abdelsalam, Ibrahim (2021) Generalized active power low controller for multi active bridge DC-DC converters with minimum-current-point-tracking algorithm. IEEE Transactions on Industrial Electronics. ISSN 0278-0046 (In Press)

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    Abstract

    This paper proposes a new active power flow controller for DC-DC multi active bridge (MAB) converters with minimum current point tracking (MCPT) to minimize conductive losses. Unlike recent efforts in this area, the proposed controller does not require look-up table for implementation nor complex non-linear converter modelling and is not circuit parameter-dependent. The proposed control scheme is also generalized for MAB converters with any number of ports and is derived in per unit form to enable standard implementation for buck/boost/unity-gain operating modes. The proposed MCPT algorithm is based on an innovative adaptive perturb and observe (P&O) tracking of the minimum current point (MCP) on the MAB converter current characteristic plane. This MCP is tracked while active power regulation is simultaneously achieved based on a new phase shift decoupler to enable direct regulation of individual port active power. Detailed design procedure of the proposed controller is presented and extensive simulation is carried out to validate the effectiveness of the proposed MCPT closed loop controller. Experimental implementation is also provided to substantiate the simulation results.