Three-Port Multilevel Converter for Hourly Dispatching Solar PV Power with Battery Energy Storage System

Pranoy Roy, Jiang Biao He, Aaron Cramer

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations

Abstract

This study investigates a dispatching scheme of megawatt-scale solar PV power for a one-hour dispatching period for an entire day utilizing an isolated multiport converter configuration and battery energy storage system. A multilevel triple active bridge (TAB) dc-dc converter has been proposed where a neutral-point-clamped (NPC) H-bridge is employed in the high-voltage side, and the conventional two-level full-bridge is configured in the low-voltage side across the high-frequency transformer. The power losses between the proposed TAB-NPC converter and conventional TAB converter are compared to identify the superior multiport converter topology for this application. The converter loss analysis is conducted using the parameter values of the switching devices in the MATLAB/SIMULINK environment, and the proposed TAB-NPC converter is found to exhibit better performance than the conventional TAB for megawatt-scale grid-connected PV arrays. Furthermore, the curve fitting and Particle Swarm Optimization techniques are implemented to seek the optimum value of depth of discharge for the battery energy storage system taking into account both the cycling and calendar expenses. A fuzzy inference system as a function of the battery state of charge is also developed to accurately estimate the grid reference power for each one-hour dispatching period, which helps to develop a cost-effective energy storage system for hourly dispatching PV power scheme.

Original languageEnglish
Title of host publication2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings
Pages489-496
Number of pages8
ISBN (Electronic)9781728151359
DOIs
StatePublished - 2021
Event13th IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Virtual, Online, Canada
Duration: Oct 10 2021Oct 14 2021

Publication series

Name2021 IEEE Energy Conversion Congress and Exposition, ECCE 2021 - Proceedings

Conference

Conference13th IEEE Energy Conversion Congress and Exposition, ECCE 2021
Country/TerritoryCanada
CityVirtual, Online
Period10/10/2110/14/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE.

Keywords

  • battery energy storage
  • converter power loss
  • cost analysis
  • hourly dispatching
  • multiport converter
  • particle swarm optimization
  • solar power conversion

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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