Research on control strategy of cascaded power electronic transformer based on capacitance minimization
Compared with the traditional power transformer, the cascaded PET has various functions, which integrates the functions of voltage conversion, high-frequency electrical isolation, flexible power flow control and AC/ DC power interface. In order to improve the transmission efficiency and power densit...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-11-01
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| Series: | Energy Reports |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352484722020674 |
| _version_ | 1797952786387697664 |
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| author | Zhendong Ji Lei Hua Jia Yao Xiangfeng Sun |
| author_facet | Zhendong Ji Lei Hua Jia Yao Xiangfeng Sun |
| author_sort | Zhendong Ji |
| collection | DOAJ |
| description | Compared with the traditional power transformer, the cascaded PET has various functions, which integrates the functions of voltage conversion, high-frequency electrical isolation, flexible power flow control and AC/ DC power interface. In order to improve the transmission efficiency and power density of cascaded PET, it is necessary to reduce the voltage ripple of the DC sides in PET. The input stage and output stage of cascaded PET are modeled separately, and the ripple characteristics of DC side are analyzed. Compared with PI controller, PIR controller has higher gain at 100Hz is investigated. A coordinated control strategy of cascaded PET based on capacitance minimization is proposed. The input stage of PET is controlled by the traditional decoupling control method, and the output stage is controlled by phase-shift control method with PIR controller. The effectiveness and feasibility of the proposed strategy are verified by experiments. The results demonstrate that the voltage ripple can be reduced to 1/4 of the original. Within the boundary of the specified ripple, DC side capacitance can be reduced to 1/4 of the original. |
| first_indexed | 2024-04-10T22:52:35Z |
| format | Article |
| id | doaj.art-6e5324c33e4b4fccbe4ac78fb15dd650 |
| institution | Directory Open Access Journal |
| issn | 2352-4847 |
| language | English |
| last_indexed | 2024-04-10T22:52:35Z |
| publishDate | 2022-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Energy Reports |
| spelling | doaj.art-6e5324c33e4b4fccbe4ac78fb15dd6502023-01-15T04:22:06ZengElsevierEnergy Reports2352-48472022-11-018164175Research on control strategy of cascaded power electronic transformer based on capacitance minimizationZhendong Ji0Lei Hua1Jia Yao2Xiangfeng Sun3Nanjing University of Science and Technology, Nanjing 210094, China; Corresponding author.State Grid Chuzhou Power Supply Company, Chuzhou 239000, ChinaNanjing University of Science and Technology, Nanjing 210094, ChinaShanghai Institution of Space Power-source, Shanghai 200245, ChinaCompared with the traditional power transformer, the cascaded PET has various functions, which integrates the functions of voltage conversion, high-frequency electrical isolation, flexible power flow control and AC/ DC power interface. In order to improve the transmission efficiency and power density of cascaded PET, it is necessary to reduce the voltage ripple of the DC sides in PET. The input stage and output stage of cascaded PET are modeled separately, and the ripple characteristics of DC side are analyzed. Compared with PI controller, PIR controller has higher gain at 100Hz is investigated. A coordinated control strategy of cascaded PET based on capacitance minimization is proposed. The input stage of PET is controlled by the traditional decoupling control method, and the output stage is controlled by phase-shift control method with PIR controller. The effectiveness and feasibility of the proposed strategy are verified by experiments. The results demonstrate that the voltage ripple can be reduced to 1/4 of the original. Within the boundary of the specified ripple, DC side capacitance can be reduced to 1/4 of the original.http://www.sciencedirect.com/science/article/pii/S2352484722020674Cascaded power electronic transformerDual active bridgeRipple suppressionVoltage balance |
| spellingShingle | Zhendong Ji Lei Hua Jia Yao Xiangfeng Sun Research on control strategy of cascaded power electronic transformer based on capacitance minimization Energy Reports Cascaded power electronic transformer Dual active bridge Ripple suppression Voltage balance |
| title | Research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| title_full | Research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| title_fullStr | Research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| title_full_unstemmed | Research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| title_short | Research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| title_sort | research on control strategy of cascaded power electronic transformer based on capacitance minimization |
| topic | Cascaded power electronic transformer Dual active bridge Ripple suppression Voltage balance |
| url | http://www.sciencedirect.com/science/article/pii/S2352484722020674 |
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