Cascaded H-bridge converter with multiphase isolated DC/DC converter for large-scale PV system

Hyuntae Choi, Mihai Ciobotaru, Vassilios G. Agelidis

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

9 Citations (Scopus)

Abstract

The large-scale grid-connected photovoltaic (PV) systems have continuously increased, reaching hundreds of megawatts level. This trend will continue in the upcoming years, thus rising new challenges to the existing PV system configurations and grid converters design. The cascaded H-bridge (CHB) converter could be a possible solution to these challenges in terms of scalability and modularity. However, the CHB converter topology faces the issue of leakage current which could cause safety issues. Moreover, the inherent power imbalance issue of a PV system using a CHB topology needs to be handled. This paper introduces a multiphase isolated DC/DC converter which eliminates the leakage current issue. Additionally, a control strategy has been implemented to deal with the power imbalance between different H-bridges in one leg and also between the three phases. Simulation results are presented to validate the performance of the proposed PV system configuration.
Original languageEnglish
Title of host publication2014 IEEE International Conference on Industrial Technology (ICIT 2014)
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages455-461
Number of pages7
ISBN (Electronic)9781479939398
ISBN (Print)9781479939404
DOIs
Publication statusPublished - 9 Sep 2014
Externally publishedYes
Event2014 IEEE International Conference on Industrial Technology, ICIT 2014 - Busan, Korea, Republic of
Duration: 26 Feb 20141 Mar 2014

Conference

Conference2014 IEEE International Conference on Industrial Technology, ICIT 2014
CountryKorea, Republic of
CityBusan
Period26/02/141/03/14

Keywords

  • boost-half-bridge converter
  • Cascaded H-bridge converter
  • Large-scale PV system
  • Multiphase isolated converter
  • Power imbalance control

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