A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters
This paper proposes a generalised commutation strategy suitable for matrix-based isolated AC/AC conversion stages in Solid State Transformers for use whenever there is nonnegligible leakage inductance in the isolation transformer. The standard 4-step commutation used in matrix converters can no long...
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IEEE
2018
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| Online Access: | https://eprints.nottingham.ac.uk/53510/ |
| _version_ | 1848798952345829376 |
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| author | Nasir, Usman Costabeber, Alessandro Rivera, Marco Wheeler, Pat Clare, Jon |
| author_facet | Nasir, Usman Costabeber, Alessandro Rivera, Marco Wheeler, Pat Clare, Jon |
| author_sort | Nasir, Usman |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | This paper proposes a generalised commutation strategy suitable for matrix-based isolated AC/AC conversion stages in Solid State Transformers for use whenever there is nonnegligible leakage inductance in the isolation transformer. The standard 4-step commutation used in matrix converters can no longer be applied when transformer leakage inductance is present, as overrated switching devices or dissipative snubbers would be necessary, reducing the attractiveness of the topologies that include matrix-based isolated AC/AC stages. A case study of a single-phase AC/AC converter has been investigated in detail to demonstrate the application of the proposed commutation method to a topology that has recently been identified as the potential building block for future multi-modular AC/AC converters for grid applications. The proposed leakage-inductance-tolerant commutation strategy is based on the definition of a current decoupling phase in the commutation sequence and only needs suitable timing of the commutation steps, without high bandwidth voltage or current measurements. Matching simulations and experimental results from a 3kW laboratory scale prototype are presented to support the effectiveness of the proposed strategy. |
| first_indexed | 2025-11-14T20:27:56Z |
| format | Article |
| id | nottingham-53510 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:27:56Z |
| publishDate | 2018 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-535102018-08-28T11:05:08Z https://eprints.nottingham.ac.uk/53510/ A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters Nasir, Usman Costabeber, Alessandro Rivera, Marco Wheeler, Pat Clare, Jon This paper proposes a generalised commutation strategy suitable for matrix-based isolated AC/AC conversion stages in Solid State Transformers for use whenever there is nonnegligible leakage inductance in the isolation transformer. The standard 4-step commutation used in matrix converters can no longer be applied when transformer leakage inductance is present, as overrated switching devices or dissipative snubbers would be necessary, reducing the attractiveness of the topologies that include matrix-based isolated AC/AC stages. A case study of a single-phase AC/AC converter has been investigated in detail to demonstrate the application of the proposed commutation method to a topology that has recently been identified as the potential building block for future multi-modular AC/AC converters for grid applications. The proposed leakage-inductance-tolerant commutation strategy is based on the definition of a current decoupling phase in the commutation sequence and only needs suitable timing of the commutation steps, without high bandwidth voltage or current measurements. Matching simulations and experimental results from a 3kW laboratory scale prototype are presented to support the effectiveness of the proposed strategy. IEEE 2018-07-31 Article PeerReviewed application/pdf en https://eprints.nottingham.ac.uk/53510/1/A%20Leakage-Inductance-Tolerant%20Commutation.pdf Nasir, Usman, Costabeber, Alessandro, Rivera, Marco, Wheeler, Pat and Clare, Jon (2018) A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters. IEEE Journal of Emerging and Selected Topics in Power Electronics . ISSN 2168-6785 4-Step Commutation Grid interconnection Isolated Single-Phase AC-AC converters Leakage-inductance Matrix converters Multi-Modular converters Solid-State Transformers https://ieeexplore.ieee.org/document/8423178/ doi:10.1109/JESTPE.2018.2861326 doi:10.1109/JESTPE.2018.2861326 |
| spellingShingle | 4-Step Commutation Grid interconnection Isolated Single-Phase AC-AC converters Leakage-inductance Matrix converters Multi-Modular converters Solid-State Transformers Nasir, Usman Costabeber, Alessandro Rivera, Marco Wheeler, Pat Clare, Jon A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title | A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title_full | A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title_fullStr | A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title_full_unstemmed | A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title_short | A leakage-inductance-tolerant commutation strategy for isolated AC/AC converters |
| title_sort | leakage-inductance-tolerant commutation strategy for isolated ac/ac converters |
| topic | 4-Step Commutation Grid interconnection Isolated Single-Phase AC-AC converters Leakage-inductance Matrix converters Multi-Modular converters Solid-State Transformers |
| url | https://eprints.nottingham.ac.uk/53510/ https://eprints.nottingham.ac.uk/53510/ https://eprints.nottingham.ac.uk/53510/ |