Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables
Interlinking dc-dc converters are essential in urban-area dc distribution grids to interconnect the medium-voltage and low-voltage (LV) buses. The increasing installation of renewable energy sources at the LV side will result in backward power flow through these converters, which is usually less tha...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/176058 |
| _version_ | 1826123043426009088 |
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| author | Sun, Changjiang Wang, Shuai Pou, Josep Gajanayake, Chandana Jayampathi Gupta, Amit Kumar |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Sun, Changjiang Wang, Shuai Pou, Josep Gajanayake, Chandana Jayampathi Gupta, Amit Kumar |
| author_sort | Sun, Changjiang |
| collection | NTU |
| description | Interlinking dc-dc converters are essential in urban-area dc distribution grids to interconnect the medium-voltage and low-voltage (LV) buses. The increasing installation of renewable energy sources at the LV side will result in backward power flow through these converters, which is usually less than the forward power. This letter presents an asymmetrical-bidirectional input-series-output-parallel (AB-ISOP) dc-dc converter with a partial-scale backward power rating to satisfy the above realistic requirement. Single-active bridge (SAB) and dual-active bridge (DAB) converter modules are combined in the proposed structure: the unidirectional SABs process most of the forward power, whereas the bidirectional DABs provide passage for the backward power flow. A string of embedded nonisolated resonant DAB converters is constructed at the input stage to realize natural power coupling and voltage sharing. Compared with the all-DAB ISOP scheme, the proposed one requires fewer devices and presents higher conversion efficiency as active switches are omitted at the secondary side of SABs. Experiments conducted on the downscale prototype verify the operating principles and performance of the proposed converter. |
| first_indexed | 2024-10-01T05:58:11Z |
| format | Journal Article |
| id | ntu-10356/176058 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T05:58:11Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1760582024-05-13T04:23:25Z Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables Sun, Changjiang Wang, Shuai Pou, Josep Gajanayake, Chandana Jayampathi Gupta, Amit Kumar School of Electrical and Electronic Engineering Rolls-Royce@NTU Corporate Lab Engineering DC distribution grids Dual active bridge converter Interlinking dc-dc converters are essential in urban-area dc distribution grids to interconnect the medium-voltage and low-voltage (LV) buses. The increasing installation of renewable energy sources at the LV side will result in backward power flow through these converters, which is usually less than the forward power. This letter presents an asymmetrical-bidirectional input-series-output-parallel (AB-ISOP) dc-dc converter with a partial-scale backward power rating to satisfy the above realistic requirement. Single-active bridge (SAB) and dual-active bridge (DAB) converter modules are combined in the proposed structure: the unidirectional SABs process most of the forward power, whereas the bidirectional DABs provide passage for the backward power flow. A string of embedded nonisolated resonant DAB converters is constructed at the input stage to realize natural power coupling and voltage sharing. Compared with the all-DAB ISOP scheme, the proposed one requires fewer devices and presents higher conversion efficiency as active switches are omitted at the secondary side of SABs. Experiments conducted on the downscale prototype verify the operating principles and performance of the proposed converter. Agency for Science, Technology and Research (A*STAR) This work was supported by the RIE2022 Industry Alignment Fund-Industry Collaboration Projects Funding Initiative, as well as cash and in kind contribution from Rolls-Royce Singapore Pte Ltd. 2024-05-13T04:23:25Z 2024-05-13T04:23:25Z 2024 Journal Article Sun, C., Wang, S., Pou, J., Gajanayake, C. J. & Gupta, A. K. (2024). Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables. IEEE Transactions On Power Electronics, 39(4), 3943-3949. https://dx.doi.org/10.1109/TPEL.2023.3329775 0885-8993 https://hdl.handle.net/10356/176058 10.1109/TPEL.2023.3329775 2-s2.0-85181567475 4 39 3943 3949 en IEEE Transactions on Power Electronics © 2023 IEEE. All rights reserved. |
| spellingShingle | Engineering DC distribution grids Dual active bridge converter Sun, Changjiang Wang, Shuai Pou, Josep Gajanayake, Chandana Jayampathi Gupta, Amit Kumar Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title | Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title_full | Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title_fullStr | Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title_full_unstemmed | Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title_short | Asymmetrical-bidirectional input-series-output-parallel modular DC-DC converter in DC distribution grids with renewables |
| title_sort | asymmetrical bidirectional input series output parallel modular dc dc converter in dc distribution grids with renewables |
| topic | Engineering DC distribution grids Dual active bridge converter |
| url | https://hdl.handle.net/10356/176058 |
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