New grid-tied cascaded multilevel inverter topology with reduced number of switches

Shahab Sajedi, Malabika Basu, Michael Farrell

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

Abstract

Performance of multilevel inverters (MLI) are distinguished because of their low harmonic waveform generation, low filtering requirements on AC side and high voltage application. Among different (MLI) topologies, cascaded multi-level inverters (CMLI) are easier to implement and are much more cost effective. The main drawback of multilevel inverters is requirement of more than one isolated DC source and a lot of switches which makes them bulky and expensive to implement. To address this issue, researchers have investigated new topologies with reduced number of switches compared to conventional multilevel converters. In this paper, a new grid-tied cascaded multi-level topology with reduced number of switches is proposed. Compared to a standard 11-level MLI, the number of switches are reduced. The objective of the design is to reduce the number of DC sources and switches in order to reach the same level of the output voltage. Finally, performance of the proposed topology with a range of modulation and load power factor, operation regarding connection to the grid with closed loop control and comparative study with the other topologies is presented.

Original languageEnglish
Title of host publication2017 52nd International Universities Power Engineering Conference, UPEC 2017
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-6
Number of pages6
ISBN (Electronic)9781538623442
DOIs
Publication statusPublished - 19 Dec 2017
Event52nd International Universities Power Engineering Conference, UPEC 2017 - Heraklion, Crete, Greece
Duration: 28 Aug 201731 Aug 2017

Publication series

Name2017 52nd International Universities Power Engineering Conference, UPEC 2017
Volume2017-January

Conference

Conference52nd International Universities Power Engineering Conference, UPEC 2017
Country/TerritoryGreece
CityHeraklion, Crete
Period28/08/1731/08/17

Keywords

  • Cascaded H-bridge (CHB)
  • Cascaded Multilevel Inverters (CMLI)
  • Grid-tied cascaded multi-level
  • Load power factor
  • Low filtering requirements
  • Multilevel Inverters (MLI)

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