Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration

Yifan Yu, Georgios Konstantinou, Christopher David Townsend, Vassilios Agelidis

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

Photovoltaic (PV) power generation levels in the three phases of a multilevel cascaded H-bridge (CHB) converter can be significantly unbalanced, owing to different irradiance levels and ambient temperatures over a large-scale solar PV power plant. Injection of a zero-sequence voltage is required to maintain three-phase balanced grid currents with unbalanced power generation. This study theoretically compares power balance capabilities of various zero-sequence injection methods based on two metrics which can be easily generalised for all CHB applications to PV systems. Experimental results based on a 430 V, 10 kW, three-phase, seven-level cascaded H-bridge converter prototype confirm superior performance of the optimal zero-sequence injection technique.
Original languageEnglish
JournalI E T Renewable Power Generation
Volume11
Issue number5
Pages (from-to)603-613
Number of pages11
ISSN1752-1416
DOIs
Publication statusPublished - 2017

Cite this

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title = "Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration",
abstract = "Photovoltaic (PV) power generation levels in the three phases of a multilevel cascaded H-bridge (CHB) converter can be significantly unbalanced, owing to different irradiance levels and ambient temperatures over a large-scale solar PV power plant. Injection of a zero-sequence voltage is required to maintain three-phase balanced grid currents with unbalanced power generation. This study theoretically compares power balance capabilities of various zero-sequence injection methods based on two metrics which can be easily generalised for all CHB applications to PV systems. Experimental results based on a 430 V, 10 kW, three-phase, seven-level cascaded H-bridge converter prototype confirm superior performance of the optimal zero-sequence injection technique.",
author = "Yifan Yu and Georgios Konstantinou and Townsend, {Christopher David} and Vassilios Agelidis",
year = "2017",
doi = "10.1049/iet-rpg.2016.0621",
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Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration. / Yu, Yifan; Konstantinou, Georgios; Townsend, Christopher David; Agelidis, Vassilios.

In: I E T Renewable Power Generation, Vol. 11, No. 5, 2017, p. 603-613.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Comparison of zero-sequence injection methods in cascaded H-bridge multilevel converters for large-scale photovoltaic integration

AU - Yu, Yifan

AU - Konstantinou, Georgios

AU - Townsend, Christopher David

AU - Agelidis, Vassilios

PY - 2017

Y1 - 2017

N2 - Photovoltaic (PV) power generation levels in the three phases of a multilevel cascaded H-bridge (CHB) converter can be significantly unbalanced, owing to different irradiance levels and ambient temperatures over a large-scale solar PV power plant. Injection of a zero-sequence voltage is required to maintain three-phase balanced grid currents with unbalanced power generation. This study theoretically compares power balance capabilities of various zero-sequence injection methods based on two metrics which can be easily generalised for all CHB applications to PV systems. Experimental results based on a 430 V, 10 kW, three-phase, seven-level cascaded H-bridge converter prototype confirm superior performance of the optimal zero-sequence injection technique.

AB - Photovoltaic (PV) power generation levels in the three phases of a multilevel cascaded H-bridge (CHB) converter can be significantly unbalanced, owing to different irradiance levels and ambient temperatures over a large-scale solar PV power plant. Injection of a zero-sequence voltage is required to maintain three-phase balanced grid currents with unbalanced power generation. This study theoretically compares power balance capabilities of various zero-sequence injection methods based on two metrics which can be easily generalised for all CHB applications to PV systems. Experimental results based on a 430 V, 10 kW, three-phase, seven-level cascaded H-bridge converter prototype confirm superior performance of the optimal zero-sequence injection technique.

U2 - 10.1049/iet-rpg.2016.0621

DO - 10.1049/iet-rpg.2016.0621

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SP - 603

EP - 613

JO - I E T Renewable Power Generation

JF - I E T Renewable Power Generation

SN - 1752-1416

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