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JCST

Journal of Current Science and Technology

ISSN 2630-0583 (Print)

ISSN 2630-0656 (Online)

A novel approach and analysis for PV firming using grid-tied three-port microinverter

  • Mahmood Alharbi, Department of Electrical Engineering, Taibah University, Medina 42353, Saudi Arabia, Corresponding author; E-mail: maotay1988@gmail.com
  • Issa Batarseh, Department of Electrical and Computer Engineering, University of Central Florida, Orlando, FL 32816, United States

Abstract

With the demand increase for electricity, the ever-increasing awareness of environmental issues, coupled with rolling blackouts, the role of renewable energy generation will become even more significant.  In this paper, a novel strategy is proposed that can harvest stable solar power despite of intermittency in solar irradiance, where a panel-level three-port grid-tied PV microinverter system is used instead of the traditional high-power energy storage and management system at the utility scale to implement PV firming.  The microinverter system is composed of a front-end flyback converter and an H-bridge for inverter/rectifier, with battery stack connected to the DC-link.  The proposed PV firming strategy lies in static and dynamic algorithms to generate smooth PV reference power, and the outcomes are implemented then to various control methods to charge/discharge the battery stack so that a stable power generation profile is obtained.  Further, topology, simulation and experimental results are presente.  Real-time PV intermittency and usable capacity data were discussed and analyzed in MATLAB/SIMULINK to validate the PV firming control.  The experimental results verify the proposed PV firming algorithms.

Keywords: dynamic algorithm, DC/DC converter, DC/AC inverter, energy storage, PV firming, three-port microinverter

PDF (1.9 MB)

DOI: 10.14456/jcst.2020.1

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