System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems
This paper presents system-level efficiency evaluation of the suitable isolated dc/dc converters in input-series-output-parallel power electronics transformers (PET) applied for medium-voltage dc systems and provides engineering insights into the design of PETs from a system perspective. To this end...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IEEE
2019-01-01
|
| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/8681119/ |
| _version_ | 1818416139613503488 |
|---|---|
| author | You Wang Kui Wang Chi Li Zedong Zheng Yongdong Li |
| author_facet | You Wang Kui Wang Chi Li Zedong Zheng Yongdong Li |
| author_sort | You Wang |
| collection | DOAJ |
| description | This paper presents system-level efficiency evaluation of the suitable isolated dc/dc converters in input-series-output-parallel power electronics transformers (PET) applied for medium-voltage dc systems and provides engineering insights into the design of PETs from a system perspective. To this end, three candidates-a single-stage dual active bridge (DAB) converter, a boost converter plus a DAB with a constant boost output voltage, and a boost converter plus a DAB with a constant DAB voltage gain-are selected and evaluated from a system-level aspect. Comprehensive system-level efficiency comparisons are done with the chosen candidates, considering numbers of normal and hot standby submodules, different working conditions, rated voltages and power of the PET, switching frequencies, and commercial devices. Analysis with detailed loss breakdowns clearly shows the distribution of losses and elaborates the profound reasons behind the efficiency differences. In the comparison, the boost and DAB with a constant boost output voltage have higher or similar efficiency than the other two candidates, verified by simulation and experimental results. Considering its advantages in redundancy in the PET, the boost and DAB with constant boost output voltage are a preferable choice for submodules in input-series-output-parallel PETs. |
| first_indexed | 2024-12-14T11:46:08Z |
| format | Article |
| id | doaj.art-4b33336c840642c6bb5ea57ce45ba24b |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-14T11:46:08Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-4b33336c840642c6bb5ea57ce45ba24b2022-12-21T23:02:35ZengIEEEIEEE Access2169-35362019-01-017484454845810.1109/ACCESS.2019.29090148681119System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC SystemsYou Wang0https://orcid.org/0000-0002-7528-8622Kui Wang1Chi Li2Zedong Zheng3Yongdong Li4Department of Electrical Engineering, Tsinghua University, Beijing, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing, ChinaDepartment of Electrical Engineering, Tsinghua University, Beijing, ChinaThis paper presents system-level efficiency evaluation of the suitable isolated dc/dc converters in input-series-output-parallel power electronics transformers (PET) applied for medium-voltage dc systems and provides engineering insights into the design of PETs from a system perspective. To this end, three candidates-a single-stage dual active bridge (DAB) converter, a boost converter plus a DAB with a constant boost output voltage, and a boost converter plus a DAB with a constant DAB voltage gain-are selected and evaluated from a system-level aspect. Comprehensive system-level efficiency comparisons are done with the chosen candidates, considering numbers of normal and hot standby submodules, different working conditions, rated voltages and power of the PET, switching frequencies, and commercial devices. Analysis with detailed loss breakdowns clearly shows the distribution of losses and elaborates the profound reasons behind the efficiency differences. In the comparison, the boost and DAB with a constant boost output voltage have higher or similar efficiency than the other two candidates, verified by simulation and experimental results. Considering its advantages in redundancy in the PET, the boost and DAB with constant boost output voltage are a preferable choice for submodules in input-series-output-parallel PETs.https://ieeexplore.ieee.org/document/8681119/Dual active bridgeefficiencyinput series output parallelmedium-voltage dcredundancypower electronics transformer |
| spellingShingle | You Wang Kui Wang Chi Li Zedong Zheng Yongdong Li System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems IEEE Access Dual active bridge efficiency input series output parallel medium-voltage dc redundancy power electronics transformer |
| title | System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems |
| title_full | System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems |
| title_fullStr | System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems |
| title_full_unstemmed | System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems |
| title_short | System-Level Efficiency Evaluation of Isolated DC/DC Converters in Power Electronics Transformers for Medium-Voltage DC Systems |
| title_sort | system level efficiency evaluation of isolated dc dc converters in power electronics transformers for medium voltage dc systems |
| topic | Dual active bridge efficiency input series output parallel medium-voltage dc redundancy power electronics transformer |
| url | https://ieeexplore.ieee.org/document/8681119/ |
| work_keys_str_mv | AT youwang systemlevelefficiencyevaluationofisolateddcdcconvertersinpowerelectronicstransformersformediumvoltagedcsystems AT kuiwang systemlevelefficiencyevaluationofisolateddcdcconvertersinpowerelectronicstransformersformediumvoltagedcsystems AT chili systemlevelefficiencyevaluationofisolateddcdcconvertersinpowerelectronicstransformersformediumvoltagedcsystems AT zedongzheng systemlevelefficiencyevaluationofisolateddcdcconvertersinpowerelectronicstransformersformediumvoltagedcsystems AT yongdongli systemlevelefficiencyevaluationofisolateddcdcconvertersinpowerelectronicstransformersformediumvoltagedcsystems |