A Common Ground-type Single-Phase Dual Mode Five-Level Switched-Capacitor Transformerless Inverter

Md Noman Habib Khan, Yam Prasad Siwakoti, Mark J. Scott, Saad UI Hasan, Benjamin Shaffer, Li Li, Shakil Ahamed Khan, Frede Blaabjerg

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

Abstract

This paper presents a novel dual mode five-level common ground type (5L-DM-CGT) transformerless inverter topology with a wide input range (200 V - 400 V). It consists of eight switches, one diode, two capacitors, and an LC filter at the output. The topology eliminates common mode (CM) leakage current by connecting the negative terminal of the photovoltaic (PV) directly to the neutral point of the grid, which bypasses the PV array's stray capacitance. Depending on the magnitude of the input voltage, the converter can operate in buck or boost mode to produce the same AC voltage output. The analysis shows the advantages of dual mode inverter for various industrial applications. MATLAB Simulink simulations and experimental results verify the concept of the proposed topology and control method.
Original languageEnglish
Title of host publicationProceedings of the 2020 IEEE Applied Power Electronics Conference and Exposition (APEC)
Number of pages6
Place of PublicationUSA
PublisherIEEE Press
Publication dateMar 2020
Pages436-441
Article number9124205
ISBN (Print)978-1-7281-4830-4
ISBN (Electronic)978-1-7281-4829-8
DOIs
Publication statusPublished - Mar 2020
Event2020 IEEE Applied Power Electronics Conference and Exposition (APEC) - New Orleans, LA, United States
Duration: 15 Mar 202019 Mar 2020

Conference

Conference2020 IEEE Applied Power Electronics Conference and Exposition (APEC)
CountryUnited States
CityNew Orleans, LA
Period15/03/202019/03/2020

Keywords

  • Common mode (CM)
  • leakage current
  • photovoltaic system
  • common ground

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