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

doi:10.1109/TENCON.2016.7848152

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

School of Engineering

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

7 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 language	English
Title of host publication	Proceedings of the 2016 IEEE Region 10 Conference, TENCON 2016
Publisher	IEEE, Institute of Electrical and Electronics Engineers
Pages	984-987
Number of pages	4
ISBN (Electronic)	9781509025961
DOIs	https://doi.org/10.1109/TENCON.2016.7848152
Publication status	Published - 8 Feb 2017
Event	2016 IEEE Region 10 Conference, TENCON 2016 - Singapore, Singapore Duration: 22 Nov 2016 → 25 Nov 2016

Conference

Conference	2016 IEEE Region 10 Conference, TENCON 2016
Country/Territory	Singapore
City	Singapore
Period	22/11/16 → 25/11/16

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1109/TENCON.2016.7848152

Cite this

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title = "Low-voltage ride-through capability of full-row connected cascaded H-bridge converters",

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.",

keywords = "active/reactive power injection, full-row connected cascaded H-bridge (CHB) converter, low-voltage ride-through (LVRT), multilevel converter, Photovoltaic systems, unbalanced voltage sag",

author = "Tafti, \{Hossein Dehghani\} and Maswood, \{Ali Iftekhar\} and Georgios Konstantinou and Josep Pou and Townsend, \{Christopher D.\}",

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Tafti, HD, Maswood, AI, Konstantinou, G, Pou, J & Townsend, CD 2017, Low-voltage ride-through capability of full-row connected cascaded H-bridge converters. in Proceedings of the 2016 IEEE Region 10 Conference, TENCON 2016., 7848152, IEEE, Institute of Electrical and Electronics Engineers, pp. 984-987, 2016 IEEE Region 10 Conference, TENCON 2016, Singapore, Singapore, 22/11/16. https://doi.org/10.1109/TENCON.2016.7848152

Low-voltage ride-through capability of full-row connected cascaded H-bridge converters. / Tafti, Hossein Dehghani; Maswood, Ali Iftekhar; Konstantinou, Georgios et al.
Proceedings of the 2016 IEEE Region 10 Conference, TENCON 2016. IEEE, Institute of Electrical and Electronics Engineers, 2017. p. 984-987 7848152.

Research output: Chapter in Book/Conference paper › Conference paper › peer-review

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AU - Pou, Josep

AU - Townsend, Christopher D.

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AB - 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.

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ER -

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

Abstract

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UN SDGs

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