Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination
Dual power supply cascaded-type power electronic transformers (DPSC-PET) is connected to two power supplies with high operational reliability and flexible operation mode, and it can be widely used in medium and low voltage distribution networks. It is of great importance to conduct in-depth research...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Electric Power Engineering Technology
2025-01-01
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| Series: | 电力工程技术 |
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| Online Access: | https://www.epet-info.com/dlgcjsen/article/abstract/240926976 |
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| author | ZHANG Tengfei WANG Guanghua GAO Long LI Jing XU Yonghai WANG Chong |
| author_facet | ZHANG Tengfei WANG Guanghua GAO Long LI Jing XU Yonghai WANG Chong |
| author_sort | ZHANG Tengfei |
| collection | DOAJ |
| description | Dual power supply cascaded-type power electronic transformers (DPSC-PET) is connected to two power supplies with high operational reliability and flexible operation mode, and it can be widely used in medium and low voltage distribution networks. It is of great importance to conduct in-depth research on its voltage sag tolerance and regulation method for maintaining efficient energy transmission of DPSC-PET as well as high quality power supply during voltage sag. Firstly, the topological structure and control strategy of DPSC-PET are analyzed. Secondly, the influence factors of voltage sag tolerance of DPSC-PET are analyzed for three-phase symmetrical voltage sag which has the most serious power shortage. Then, from the perspective of power balance, a real-time analysis method of voltage sag immunity of DPSC-PET as well as power coordination method between dual input ports when voltage sag occurs on different power supply are proposed to achieve a perfect recovery of low-voltage DC bus voltage, which means the significant improvement of DPSC-PET to cope with transient disturbances. Finally, the simulation model of DPSC-PET is established and the simulations for voltage sag occurred with different magnitudes on different power supply are cited out. The results show that the voltage sag tolerance of DPSC-PET is significantly improved with the proposed method. |
| format | Article |
| id | doaj-art-18b015e57ae64603a0a27fa50d923272 |
| institution | Kabale University |
| issn | 2096-3203 |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Department of Electric Power Engineering Technology |
| record_format | Article |
| series | 电力工程技术 |
| spelling | doaj-art-18b015e57ae64603a0a27fa50d9232722025-02-08T08:40:18ZzhoEditorial Department of Electric Power Engineering Technology电力工程技术2096-32032025-01-014419210310.12158/j.2096-3203.2025.01.010240926976Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordinationZHANG Tengfei0WANG Guanghua1GAO Long2LI Jing3XU Yonghai4WANG Chong5State Grid Hebei Electric Power Co., Ltd. Baoding Power Supply Company, Baoding 071000, ChinaState Grid Hebei Electric Power Co., Ltd. Baoding Power Supply Company, Baoding 071000, ChinaState Grid Hebei Electric Power Co., Ltd. Baoding Power Supply Company, Baoding 071000, ChinaState Grid Hebei Electric Power Co., Ltd. Baoding Power Supply Company, Baoding 071000, ChinaSchool of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, ChinaSchool of Electrical and Electronic Engineering, North China Electric Power University, Beijing 102206, ChinaDual power supply cascaded-type power electronic transformers (DPSC-PET) is connected to two power supplies with high operational reliability and flexible operation mode, and it can be widely used in medium and low voltage distribution networks. It is of great importance to conduct in-depth research on its voltage sag tolerance and regulation method for maintaining efficient energy transmission of DPSC-PET as well as high quality power supply during voltage sag. Firstly, the topological structure and control strategy of DPSC-PET are analyzed. Secondly, the influence factors of voltage sag tolerance of DPSC-PET are analyzed for three-phase symmetrical voltage sag which has the most serious power shortage. Then, from the perspective of power balance, a real-time analysis method of voltage sag immunity of DPSC-PET as well as power coordination method between dual input ports when voltage sag occurs on different power supply are proposed to achieve a perfect recovery of low-voltage DC bus voltage, which means the significant improvement of DPSC-PET to cope with transient disturbances. Finally, the simulation model of DPSC-PET is established and the simulations for voltage sag occurred with different magnitudes on different power supply are cited out. The results show that the voltage sag tolerance of DPSC-PET is significantly improved with the proposed method.https://www.epet-info.com/dlgcjsen/article/abstract/240926976dual power supplypower electronic transformer (pet)voltage sagtolerancedc bus voltagepower balance |
| spellingShingle | ZHANG Tengfei WANG Guanghua GAO Long LI Jing XU Yonghai WANG Chong Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination 电力工程技术 dual power supply power electronic transformer (pet) voltage sag tolerance dc bus voltage power balance |
| title | Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination |
| title_full | Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination |
| title_fullStr | Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination |
| title_full_unstemmed | Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination |
| title_short | Method for improving voltage sag tolerance of dual power supply PET based on inter-port power coordination |
| title_sort | method for improving voltage sag tolerance of dual power supply pet based on inter port power coordination |
| topic | dual power supply power electronic transformer (pet) voltage sag tolerance dc bus voltage power balance |
| url | https://www.epet-info.com/dlgcjsen/article/abstract/240926976 |
| work_keys_str_mv | AT zhangtengfei methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination AT wangguanghua methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination AT gaolong methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination AT lijing methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination AT xuyonghai methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination AT wangchong methodforimprovingvoltagesagtoleranceofdualpowersupplypetbasedoninterportpowercoordination |