Hourly dispatching utility-scale solar PV power with megawatt multilevel grid inverter

Pranoy Roy, Jiang Biao He

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

3 Scopus citations

Abstract

This study demonstrates a dispatching scheme of solar PV power utilizing two different types of energy storage components, namely, lithium-ion (Li-ion) battery and supercapacitors (SC). The cost optimization of the energy storage system, considering both cycling and calendar aging expenses, is assessed based on its usage of depth of discharge. It is found that the Li-ion battery is a better solution than the SC in terms of economic assessment for hourly dispatching PV power. Also, multilevel inverters, T-type and I-type neutral point clamped (NPC) inverters, are investigated due to their superior attributes: high efficiency, low total harmonic distortion, and reduced common-mode voltage. The power losses between the three-level T-type and I-type NPC inverters are compared, to identify the superior grid inverter topology for this application. The inverter loss analysis is conducted using the parameter values of the switching devices in the MATLAB/SIMULINK environment, and the T-type NPC inverter was found to exhibit better performance than the I-type NPC inverter for megawatt-scale grid connected PV arrays. Furthermore, an LCL filter has been designed for higher efficiency and better harmonic attenuation to interface the inverter with the utility grid.

Original languageEnglish
Title of host publication2021 IEEE Kansas Power and Energy Conference, KPEC 2021
ISBN (Electronic)9781665441193
DOIs
StatePublished - 2021
Event2nd Annual IEEE Kansas Power and Energy Conference, KPEC 2021 - Manhattan, United States
Duration: Apr 19 2021Apr 20 2021

Publication series

Name2021 IEEE Kansas Power and Energy Conference, KPEC 2021

Conference

Conference2nd Annual IEEE Kansas Power and Energy Conference, KPEC 2021
Country/TerritoryUnited States
CityManhattan
Period4/19/214/20/21

Bibliographical note

Publisher Copyright:
© 2021 IEEE

Keywords

  • Cost analysis
  • Energy storage
  • Hourly dispatching
  • LCL filter
  • Multilevel inverter
  • Solar power conversion

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Electrical and Electronic Engineering
  • Control and Optimization

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