Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage

Wei Zhao; Hyuntae Choi; Georgios Konstantinou; Mihai Ciobotaru; Vassilios G. Agelidis

doi:10.1109/PEDG.2012.6254100

Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage

Wei Zhao, Hyuntae Choi, Georgios Konstantinou, Mihai Ciobotaru, Vassilios G. Agelidis

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

79 Citations (Scopus)

Abstract

The integration of large-scale PV systems to the grid is a growing trend in modern power systems. The cascaded H-bridge (CHB) converter is a suitable candidate for the grid interconnection due to its modular characteristics, high-quality output waveforms and capability of connecting to mediumvoltage grids. However, the CHB converter requires isolated DC sources. In order to avoid the leakage currents caused by the high potential differences across the parasitic capacitance of the PV panels to ground, an isolated DC-DC conversion stage is required when the CHB topology is used. The objective of this paper is to compare two PV system configurations based on the CHB multilevel converter using two isolated DC-DC converter topologies, namely the boost-half-bridge (BHB) and the flyback, for their performance on providing isolation and achieving individual MPPT at the DC-DC power conversion stage of large-scale PV power systems. Simulation results from a 263 kW PV system based on a seven-level CHB converter with the two aforementioned isolated DC-DC converters are provided for comparison and evaluation with different input PV voltages.

Original language	English
Title of host publication	Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems
Subtitle of host publication	PEDG 2012
Publisher	Institute of Electrical and Electronics Engineers (IEEE)
Pages	849-856
Number of pages	8
ISBN (Electronic)	9781467320238
DOIs	https://doi.org/10.1109/PEDG.2012.6254100
Publication status	Published - 2012
Externally published	Yes
Event	2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012 - Aalborg, Denmark Duration: 25 Jun 2012 → 28 Jun 2012

Other

Other	2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012
Country/Territory	Denmark
City	Aalborg
Period	25/06/12 → 28/06/12

Keywords

Boost-half-bridge
Cascaded H-bridge
DC-DC isolated converter
large-scale PV

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10.1109/PEDG.2012.6254100

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84866942855&doi=10.1109%2fPEDG.2012.6254100&partnerID=40&md5=fa29774f0512dd68f575e7e37a35b58a

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Zhao, W., Choi, H., Konstantinou, G., Ciobotaru, M., & Agelidis, V. G. (2012). Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage. In Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems: PEDG 2012 (pp. 849-856). Institute of Electrical and Electronics Engineers (IEEE). https://doi.org/10.1109/PEDG.2012.6254100

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title = "Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage",

abstract = "The integration of large-scale PV systems to the grid is a growing trend in modern power systems. The cascaded H-bridge (CHB) converter is a suitable candidate for the grid interconnection due to its modular characteristics, high-quality output waveforms and capability of connecting to mediumvoltage grids. However, the CHB converter requires isolated DC sources. In order to avoid the leakage currents caused by the high potential differences across the parasitic capacitance of the PV panels to ground, an isolated DC-DC conversion stage is required when the CHB topology is used. The objective of this paper is to compare two PV system configurations based on the CHB multilevel converter using two isolated DC-DC converter topologies, namely the boost-half-bridge (BHB) and the flyback, for their performance on providing isolation and achieving individual MPPT at the DC-DC power conversion stage of large-scale PV power systems. Simulation results from a 263 kW PV system based on a seven-level CHB converter with the two aforementioned isolated DC-DC converters are provided for comparison and evaluation with different input PV voltages.",

keywords = "Boost-half-bridge, Cascaded H-bridge, DC-DC isolated converter, large-scale PV",

author = "Wei Zhao and Hyuntae Choi and Georgios Konstantinou and Mihai Ciobotaru and Agelidis, {Vassilios G.}",

year = "2012",

doi = "10.1109/PEDG.2012.6254100",

language = "English",

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booktitle = "Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems",

publisher = "Institute of Electrical and Electronics Engineers (IEEE)",

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Zhao, W, Choi, H, Konstantinou, G, Ciobotaru, M & Agelidis, VG 2012, Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage. in Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems: PEDG 2012. Institute of Electrical and Electronics Engineers (IEEE), pp. 849-856, 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems, PEDG 2012, Aalborg, Denmark, 25/06/12. https://doi.org/10.1109/PEDG.2012.6254100

Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage. / Zhao, Wei; Choi, Hyuntae; Konstantinou, Georgios et al.
Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems: PEDG 2012. Institute of Electrical and Electronics Engineers (IEEE), 2012. p. 849-856.

Research output: Chapter in Book/Report/Conference proceeding › Conference proceeding contribution › peer-review

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AU - Choi, Hyuntae

AU - Konstantinou, Georgios

AU - Ciobotaru, Mihai

AU - Agelidis, Vassilios G.

PY - 2012

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N2 - The integration of large-scale PV systems to the grid is a growing trend in modern power systems. The cascaded H-bridge (CHB) converter is a suitable candidate for the grid interconnection due to its modular characteristics, high-quality output waveforms and capability of connecting to mediumvoltage grids. However, the CHB converter requires isolated DC sources. In order to avoid the leakage currents caused by the high potential differences across the parasitic capacitance of the PV panels to ground, an isolated DC-DC conversion stage is required when the CHB topology is used. The objective of this paper is to compare two PV system configurations based on the CHB multilevel converter using two isolated DC-DC converter topologies, namely the boost-half-bridge (BHB) and the flyback, for their performance on providing isolation and achieving individual MPPT at the DC-DC power conversion stage of large-scale PV power systems. Simulation results from a 263 kW PV system based on a seven-level CHB converter with the two aforementioned isolated DC-DC converters are provided for comparison and evaluation with different input PV voltages.

AB - The integration of large-scale PV systems to the grid is a growing trend in modern power systems. The cascaded H-bridge (CHB) converter is a suitable candidate for the grid interconnection due to its modular characteristics, high-quality output waveforms and capability of connecting to mediumvoltage grids. However, the CHB converter requires isolated DC sources. In order to avoid the leakage currents caused by the high potential differences across the parasitic capacitance of the PV panels to ground, an isolated DC-DC conversion stage is required when the CHB topology is used. The objective of this paper is to compare two PV system configurations based on the CHB multilevel converter using two isolated DC-DC converter topologies, namely the boost-half-bridge (BHB) and the flyback, for their performance on providing isolation and achieving individual MPPT at the DC-DC power conversion stage of large-scale PV power systems. Simulation results from a 263 kW PV system based on a seven-level CHB converter with the two aforementioned isolated DC-DC converters are provided for comparison and evaluation with different input PV voltages.

KW - Boost-half-bridge

KW - Cascaded H-bridge

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KW - large-scale PV

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BT - Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems

PB - Institute of Electrical and Electronics Engineers (IEEE)

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ER -

Zhao W, Choi H, Konstantinou G, Ciobotaru M, Agelidis VG. Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage. In Proceedings - 2012 3rd IEEE International Symposium on Power Electronics for Distributed Generation Systems: PEDG 2012. Institute of Electrical and Electronics Engineers (IEEE). 2012. p. 849-856 doi: 10.1109/PEDG.2012.6254100

Cascaded H-bridge multilevel converter for large-scale PV grid-integration with isolated DC-DC stage

Abstract

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