Control of a hybrid modular multilevel converter during grid voltage unbalance
The recently proposed parallel hybrid modular multilevel converter is considered to be a low loss, low component count converter with soft switching capability of the ‘main’ bridge. The converter has similar advantages to other emerging modular multilevel converter circuits being considered for HVDC...
| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Published: |
2015
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| Online Access: | https://eprints.nottingham.ac.uk/32969/ |
| _version_ | 1848794530777661440 |
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| author | Amankwah, Emmanuel K. Watson, A.J. Wheeler, Patrick Clare, Jon C. |
| author_facet | Amankwah, Emmanuel K. Watson, A.J. Wheeler, Patrick Clare, Jon C. |
| author_sort | Amankwah, Emmanuel K. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | The recently proposed parallel hybrid modular multilevel converter is considered to be a low loss, low component count converter with soft switching capability of the ‘main’ bridge. The converter has similar advantages to other emerging modular multilevel converter circuits being considered for HVDC power transmission. However, during ac network unbalance the individual ‘chain-links’ exchange unequal amounts of power with the grid which requires appropriate remedial action. This paper presents research into the performance of the converter and proposes a suitable control method that enables the converter to operate during grid voltage unbalance. The proposed control concept involves the use of asymmetric third harmonic voltage generation in the ‘chain-links’ of the converter to redistribute the power exchanged between the individual ‘chain-links’ and the grid. Mathematical analysis and simulation modelling with results are presented to support the work described. |
| first_indexed | 2025-11-14T19:17:40Z |
| format | Conference or Workshop Item |
| id | nottingham-32969 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:17:40Z |
| publishDate | 2015 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-329692020-05-04T17:02:50Z https://eprints.nottingham.ac.uk/32969/ Control of a hybrid modular multilevel converter during grid voltage unbalance Amankwah, Emmanuel K. Watson, A.J. Wheeler, Patrick Clare, Jon C. The recently proposed parallel hybrid modular multilevel converter is considered to be a low loss, low component count converter with soft switching capability of the ‘main’ bridge. The converter has similar advantages to other emerging modular multilevel converter circuits being considered for HVDC power transmission. However, during ac network unbalance the individual ‘chain-links’ exchange unequal amounts of power with the grid which requires appropriate remedial action. This paper presents research into the performance of the converter and proposes a suitable control method that enables the converter to operate during grid voltage unbalance. The proposed control concept involves the use of asymmetric third harmonic voltage generation in the ‘chain-links’ of the converter to redistribute the power exchanged between the individual ‘chain-links’ and the grid. Mathematical analysis and simulation modelling with results are presented to support the work described. 2015-02-10 Conference or Workshop Item PeerReviewed Amankwah, Emmanuel K., Watson, A.J., Wheeler, Patrick and Clare, Jon C. (2015) Control of a hybrid modular multilevel converter during grid voltage unbalance. In: 11th International Conference on AC and DC Power Transmission, 10-12 Feb 2015, Birmingham, UK. HVDC modular multilevel unbalance control third harmonic injection control http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=7140566 |
| spellingShingle | HVDC modular multilevel unbalance control third harmonic injection control Amankwah, Emmanuel K. Watson, A.J. Wheeler, Patrick Clare, Jon C. Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title | Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title_full | Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title_fullStr | Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title_full_unstemmed | Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title_short | Control of a hybrid modular multilevel converter during grid voltage unbalance |
| title_sort | control of a hybrid modular multilevel converter during grid voltage unbalance |
| topic | HVDC modular multilevel unbalance control third harmonic injection control |
| url | https://eprints.nottingham.ac.uk/32969/ https://eprints.nottingham.ac.uk/32969/ |