Reduced rule based fuzzy logic controlled dual active bridge converter with optimum operating range for bidirectional energy transfer in batteries
by Anupam Kumar; Abdul Hamid Bhat; Pramod Agarwal
International Journal of Fuzzy Computation and Modelling (IJFCM), Vol. 3, No. 2, 2020

Abstract: Bidirectional energy transfer capability with high efficiency is fast becoming the central part of a lot of power conversion systems in DC microgrid. Preferably, under the economics constraint, a dual active bridge (DAB) converter having two DC-AC converters connected back to back through an AC inductor/transformer is a common converter used for obtaining high efficiency bidirectional power conversion. In this paper, performance of DAB converter with single phase shift (SPS) is evaluated with two batteries on both sides of DC bus. Reduced rule based fuzzy logic controller is used for closed loop control of DAB converter. The control logic enables the bidirectional energy transfer within the batteries at lower duty ratios. Charging and discharging of batteries is supervised by the fuzzy logic controller. Optimum operating range for converter is obtained by exhaustive simulations using MATLAB/Simulink and SimPowerSystem software and proper duty ratio for converter operation is obtained.

Online publication date: Thu, 08-Oct-2020

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