Performance comparison of single-phase transformerless PV inverter systems

Yuba Raj Kafle, Graham E. Town, Xiao Guochun, Samir Gautam

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

32 Citations (Scopus)

Abstract

Removing the isolation transformer in grid-connected photovoltaic (PV) inverters is desirable to increase efficiency and reduce the size, weight, and cost of these systems. However, it may also allow leakage current through the stray capacitance between the PV array and ground, causing a safety risk. Both efficiency and leakage current depend upon both inverter topology and modulation strategy. In this work three single-phase inverter topologies, i.e. the H-bridge, HERIC, and H5 inverters, are compared with respect to efficiency and leakage current to determine their suitability as transformerless PV inverter systems. Experimental results are presented for the most promising case, i.e. the HERIC inverter with standard sinusoidal pulse-width modulation.

Original languageEnglish
Title of host publicationThe 2017 IEEE Applied Power Electronics Conference and Exposition – APEC 2017 proceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages3589-3593
Number of pages5
ISBN (Electronic)9781509053667
ISBN (Print)9781509053674
DOIs
Publication statusPublished - 2017
Event32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017 - Tampa, United States
Duration: 26 Mar 201730 Mar 2017

Other

Other32nd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2017
Country/TerritoryUnited States
CityTampa
Period26/03/1730/03/17

Keywords

  • Common mode voltage
  • H-bridge inverter
  • H5 inverter
  • HERIC inverter
  • leakage current
  • transformerless PV inverter

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