Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System
The study proposes a novel integrated three-port bidirectional dc/dc converter for energy storage systems. The converter includes two batteries, namely 24- and 48-V batteries, used as input source and for backup energy, respectively. Each battery can supply to dc load in the normal case. When the gr...
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| Format: | Article |
| Language: | English |
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IEEE
2019-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/8778791/ |
| _version_ | 1818603288553062400 |
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| author | Yu-En Wu I-Chun Chen |
| author_facet | Yu-En Wu I-Chun Chen |
| author_sort | Yu-En Wu |
| collection | DOAJ |
| description | The study proposes a novel integrated three-port bidirectional dc/dc converter for energy storage systems. The converter includes two batteries, namely 24- and 48-V batteries, used as input source and for backup energy, respectively. Each battery can supply to dc load in the normal case. When the grid power fails, 24-V battery input is stepped up to the dc bus through a high step-up converter. The 48-V battery serves as a buffer power supply when the load increases instantaneously. At night, when the 48-V battery is under low power consumption, the dc bus can charge the battery. In addition, the converter can monitor both battery voltages simultaneously; when one battery is used excessively, the other battery can charge it, thus keeping the system power stable. The integrated three-port bidirectional dc/dc converter is a combination of a boost-flyback, forward converter, and voltage doubler and has the following advantages: 1) it operates in input continuous current and low voltage stress; 2) it provides input current recovery; 3) it improves high reverse voltage caused by the transformer; 4) it operates in zero current switching (ZCS); and 5) its doubler circuit can flexibly adjust the dc bus voltage. A 500-W three-port bidirectional dc/dc device was implemented to verify the feasibility and practicability of the proposed converter. The highest efficiency achieved for operation in 24-V battery high step-up mode was 95.3%; it was 94.9% and 95.2% in 48-V battery step-up and step-down mode, respectively. |
| first_indexed | 2024-12-16T13:20:48Z |
| format | Article |
| id | doaj.art-cb33a1ff489f41539174862e228e5b16 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-12-16T13:20:48Z |
| publishDate | 2019-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-cb33a1ff489f41539174862e228e5b162022-12-21T22:30:21ZengIEEEIEEE Access2169-35362019-01-01710460110461210.1109/ACCESS.2019.29315918778791Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage SystemYu-En Wu0https://orcid.org/0000-0001-5440-835XI-Chun Chen1Department of Electronic Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, TaiwanDepartment of Electronic Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, TaiwanThe study proposes a novel integrated three-port bidirectional dc/dc converter for energy storage systems. The converter includes two batteries, namely 24- and 48-V batteries, used as input source and for backup energy, respectively. Each battery can supply to dc load in the normal case. When the grid power fails, 24-V battery input is stepped up to the dc bus through a high step-up converter. The 48-V battery serves as a buffer power supply when the load increases instantaneously. At night, when the 48-V battery is under low power consumption, the dc bus can charge the battery. In addition, the converter can monitor both battery voltages simultaneously; when one battery is used excessively, the other battery can charge it, thus keeping the system power stable. The integrated three-port bidirectional dc/dc converter is a combination of a boost-flyback, forward converter, and voltage doubler and has the following advantages: 1) it operates in input continuous current and low voltage stress; 2) it provides input current recovery; 3) it improves high reverse voltage caused by the transformer; 4) it operates in zero current switching (ZCS); and 5) its doubler circuit can flexibly adjust the dc bus voltage. A 500-W three-port bidirectional dc/dc device was implemented to verify the feasibility and practicability of the proposed converter. The highest efficiency achieved for operation in 24-V battery high step-up mode was 95.3%; it was 94.9% and 95.2% in 48-V battery step-up and step-down mode, respectively.https://ieeexplore.ieee.org/document/8778791/Flyback converterthree-port bidirectional dc/dc convertercoupled inductor |
| spellingShingle | Yu-En Wu I-Chun Chen Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System IEEE Access Flyback converter three-port bidirectional dc/dc converter coupled inductor |
| title | Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System |
| title_full | Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System |
| title_fullStr | Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System |
| title_full_unstemmed | Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System |
| title_short | Novel Integrated Three-Port Bidirectional DC/DC Converter for Energy Storage System |
| title_sort | novel integrated three port bidirectional dc dc converter for energy storage system |
| topic | Flyback converter three-port bidirectional dc/dc converter coupled inductor |
| url | https://ieeexplore.ieee.org/document/8778791/ |
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