Title: A single phase shift-based isolated bidirectional DC-DC converter for bidirectional energy transfer in DC-microgrid with identification of optimum operating zone

Authors: Anupam Kumar; Abdul Hamid Bhat; Pramod Agarwal

Addresses: Department of Electrical Engineering, National Institute of Technology Srinagar, Jammu and Kashmir, India ' Department of Electrical Engineering, National Institute of Technology Srinagar, Jammu and Kashmir, India ' Department of Electrical Engineering, Indian Institute of Technology Roorkee, Uttarakhand, India

Abstract: In the modern times, the pertinence of a single power electronics conversion system used in DC microgrids for facilitating energy transfer between energy generating systems and storage elements with inherent bidirectional capability has increased significantly. A dual active bridge (DAB) converter having two DC-AC converters connected back to back through a high frequency transformer is used as a power electronics conversion system for obtaining highly efficient bidirectional power conversion. In this paper, performance of DAB converter with single phase shift (SPS) is evaluated with solar photovoltaic cell on high voltage DC-bus and battery on the low voltage DC-bus. Linear load is connected in this system at the high voltage DC-bus. A step variation in load is applied and at this instant the power flows from the batteries to supply the increased load demand. Optimal operating range of converter along-with efficiency is obtained.

Keywords: dual active bridge converter; bidirectional power flow; duty ratio; single phase shift; SPS; state of charge; high voltage side; low voltage side; operating range; microgrid.

DOI: 10.1504/IJIED.2019.102376

International Journal of Industrial Electronics and Drives, 2019 Vol.5 No.1, pp.26 - 40

Received: 22 Jan 2019
Accepted: 19 Mar 2019
Published online: 23 Sep 2019 *

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