Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags
Multilevel cascade H-bridge (CHB) converters are one of the promising solutions for medium- and large-scale grid-connected photovoltaic power plants. However, there is a lack of a complete study about their operation during voltage sags. This paper proposes a flexible control strategy for the operat...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Language: | English |
| Published: |
2018
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| Online Access: | https://hdl.handle.net/10356/86848 http://hdl.handle.net/10220/44243 |
| _version_ | 1811683470826536960 |
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| author | Dehghani Tafti, Hossein Maswood, Ali Iftekhar Konstantinou, Georgios Townsend, Christopher David Acuna, Pablo Pou, Josep |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Dehghani Tafti, Hossein Maswood, Ali Iftekhar Konstantinou, Georgios Townsend, Christopher David Acuna, Pablo Pou, Josep |
| author_sort | Dehghani Tafti, Hossein |
| collection | NTU |
| description | Multilevel cascade H-bridge (CHB) converters are one of the promising solutions for medium- and large-scale grid-connected photovoltaic power plants. However, there is a lack of a complete study about their operation during voltage sags. This paper proposes a flexible control strategy for the operation of photovoltaic grid-connected CHB inverters during unbalanced voltage sags. The key novelty is that the proposed strategy is able to inject both active and reactive powers to the grid with either balanced or unbalanced currents, while ensuring that all dc-link capacitor voltages remain balanced. The simulation and experimental evaluations of a 9-kVA grid-connected seven-level CHB illustrate and validate the performance of the proposed strategy for the operation of the grid-connected CHB converter during different unbalanced voltage sags. |
| first_indexed | 2024-10-01T04:13:15Z |
| format | Journal Article |
| id | ntu-10356/86848 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T04:13:15Z |
| publishDate | 2018 |
| record_format | dspace |
| spelling | ntu-10356/868482020-03-07T13:57:30Z Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags Dehghani Tafti, Hossein Maswood, Ali Iftekhar Konstantinou, Georgios Townsend, Christopher David Acuna, Pablo Pou, Josep School of Electrical and Electronic Engineering Photovoltaic Systems Multilevel Converter Multilevel cascade H-bridge (CHB) converters are one of the promising solutions for medium- and large-scale grid-connected photovoltaic power plants. However, there is a lack of a complete study about their operation during voltage sags. This paper proposes a flexible control strategy for the operation of photovoltaic grid-connected CHB inverters during unbalanced voltage sags. The key novelty is that the proposed strategy is able to inject both active and reactive powers to the grid with either balanced or unbalanced currents, while ensuring that all dc-link capacitor voltages remain balanced. The simulation and experimental evaluations of a 9-kVA grid-connected seven-level CHB illustrate and validate the performance of the proposed strategy for the operation of the grid-connected CHB converter during different unbalanced voltage sags. Accepted version 2018-01-03T03:12:48Z 2019-12-06T16:30:09Z 2018-01-03T03:12:48Z 2019-12-06T16:30:09Z 2017 Journal Article Dehghani Tafti, H., Maswood, A. I., Konstantinou, G., Townsend, C. D., Acuna, P., & Pou, J. (2018). Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags. IEEE Transactions on Industrial Electronics, 65(8), 6229-6238. 0278-0046 https://hdl.handle.net/10356/86848 http://hdl.handle.net/10220/44243 10.1109/TIE.2017.2786204 en IEEE Transactions on Industrial Electronics © 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at: [http://dx.doi.org/10.1109/TIE.2017.2786204]. 9 p. application/pdf |
| spellingShingle | Photovoltaic Systems Multilevel Converter Dehghani Tafti, Hossein Maswood, Ali Iftekhar Konstantinou, Georgios Townsend, Christopher David Acuna, Pablo Pou, Josep Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title | Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title_full | Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title_fullStr | Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title_full_unstemmed | Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title_short | Flexible Control of Photovoltaic Grid-Connected Cascaded H-Bridge Converters during Unbalanced Voltage Sags |
| title_sort | flexible control of photovoltaic grid connected cascaded h bridge converters during unbalanced voltage sags |
| topic | Photovoltaic Systems Multilevel Converter |
| url | https://hdl.handle.net/10356/86848 http://hdl.handle.net/10220/44243 |
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