Low-voltage ride-through capability of full-row connected cascaded H-bridge converters

Hossein Dehghani Tafti, Ali Iftekhar Maswood, Georgios Konstantinou, Josep Pou, Christopher D. Townsend

Research output: Chapter in Book/Conference paperConference paper

2 Citations (Scopus)

Abstract

The full-row connection of dc-links provides an alternative configuration for the cascaded H-bridge (CHB) converter in large-scale grid-connected photovoltaic systems. In each stage, a single PV string is connected to all phases through isolated dc/dc converters. The per-phase power imbalance issue and second-harmonic voltage of the dc-link capacitors are alleviated by using this topology. This paper studies the low-voltage ride-through (LVRT) capability of the HB inverter with full-row connection in a grid-connected photovoltaic power plant (GCPVPP). A control algorithm is implemented for the isolated dc/dc converters which balances the capacitor voltages during voltage sags and reduces the second-harmonic voltage ripple of the dc-link capacitors. The performance of the grid-connected HB inverter with LVRT capability is investigated on a 3-MVA single-row, three-level CHB converter for the GCPVPP connected to a 6.6 kV grid.

Original languageEnglish
Title of host publicationProceedings of the 2016 IEEE Region 10 Conference, TENCON 2016
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages984-987
Number of pages4
ISBN (Electronic)9781509025961
DOIs
Publication statusPublished - 8 Feb 2017
Externally publishedYes
Event2016 IEEE Region 10 Conference, TENCON 2016 - Singapore, Singapore
Duration: 22 Nov 201625 Nov 2016

Conference

Conference2016 IEEE Region 10 Conference, TENCON 2016
CountrySingapore
CitySingapore
Period22/11/1625/11/16

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