Performance evaluation of single-phase transfomer-less PV inverter topologies

Jinia Roy, Yinglai Xia, Raja Ayyanar

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Scopus citations

Abstract

Double line frequency power decoupling with reduced capacitance and mitigation of leakage current are two of the major challenges of any grid-connected single phase photovoltaic (PV) inverter. This paper compares the performances of different topologies for single phase transformerless PV application in terms of the power decoupling capacitor requirement, the current ripple and total harmonic distortion (THD), efficiency performance, and leakage current. The topologies considered include a doubly grounded T-type dynamic dc-link (DDCL) inverter, a half-bridge voltage swing (HBVS) inverter, and conventional full-bridge (FB) inverter with three different modulation schemes (bipolar, hybrid, and unipolar). The leakage current arising from both parasitic capacitances of the PV module and the heat sink is considered in the present study which is essential for design of the electromagnetic interference (EMI) filters. The analysis are supported by experimental results from SiC-based 1 kW hardware prototypes operating at 120 V ac nominal output at a switching frequency of 100 kHz for each of the topology.

Original languageEnglish (US)
Title of host publicationAPEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages3250-3255
Number of pages6
Volume2018-March
ISBN (Electronic)9781538611807
DOIs
StatePublished - Apr 18 2018
Event33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018 - San Antonio, United States
Duration: Mar 4 2018Mar 8 2018

Other

Other33rd Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2018
CountryUnited States
CitySan Antonio
Period3/4/183/8/18

Keywords

  • Active power decoupling
  • Common mode voltage
  • Heat sink leakage current
  • Parasitic capacitance
  • PV array leakage current
  • THD
  • Transformer-less PV inverter

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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  • Cite this

    Roy, J., Xia, Y., & Ayyanar, R. (2018). Performance evaluation of single-phase transfomer-less PV inverter topologies. In APEC 2018 - 33rd Annual IEEE Applied Power Electronics Conference and Exposition (Vol. 2018-March, pp. 3250-3255). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APEC.2018.8341568