Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions
In recent years, modular multilevel converters (MMCs) have been increasingly used in the field of electric vehicle charging and discharging due to their unique performance advantages. However, the unique cascade structure of MMCs raises the problem of the circulating current. Due to chemical process...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-07-01
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| Series: | World Electric Vehicle Journal |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2032-6653/14/7/181 |
| _version_ | 1797587204505075712 |
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| author | Mincheng Yao Hongyu Ni Feng Zhao Wenyuan Wang Wenxu Yan |
| author_facet | Mincheng Yao Hongyu Ni Feng Zhao Wenyuan Wang Wenxu Yan |
| author_sort | Mincheng Yao |
| collection | DOAJ |
| description | In recent years, modular multilevel converters (MMCs) have been increasingly used in the field of electric vehicle charging and discharging due to their unique performance advantages. However, the unique cascade structure of MMCs raises the problem of the circulating current. Due to chemical processes, aging effects, etc., the capacitance parameters of the upper and lower bridge arms will be asymmetric, which will introduce odd harmonics into the circulating current, increasing system losses and threatening the system reliability. To address this phenomenon, this paper proposes a circulating current suppression strategy with additional virtual impedance (VI) based on a repetitive controller (RC). The corresponding simulation models were built for the comparative study of different circulating current suppression strategies. The results show that the VI-RC circulating current suppression strategy can significantly reduce the odd and even harmonics in the circulating current under asymmetric conditions, and the total harmonic distortion (THD) of the bridge arm current is only 0.98%, which verifies the effectiveness of the proposed strategy. |
| first_indexed | 2024-03-11T00:33:50Z |
| format | Article |
| id | doaj.art-fd3624bbf7ac42deba259f8296b5f3f2 |
| institution | Directory Open Access Journal |
| issn | 2032-6653 |
| language | English |
| last_indexed | 2024-03-11T00:33:50Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | World Electric Vehicle Journal |
| spelling | doaj.art-fd3624bbf7ac42deba259f8296b5f3f22023-11-18T21:48:56ZengMDPI AGWorld Electric Vehicle Journal2032-66532023-07-0114718110.3390/wevj14070181Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry ConditionsMincheng Yao0Hongyu Ni1Feng Zhao2Wenyuan Wang3Wenxu Yan4School of Internet of Things, Jiangnan University, Wuxi 214000, ChinaState Grid Shaoxing Power Supply Company, Shaoxing 312000, ChinaState Grid Shaoxing Power Supply Company, Shaoxing 312000, ChinaSchool of Internet of Things, Jiangnan University, Wuxi 214000, ChinaSchool of Internet of Things, Jiangnan University, Wuxi 214000, ChinaIn recent years, modular multilevel converters (MMCs) have been increasingly used in the field of electric vehicle charging and discharging due to their unique performance advantages. However, the unique cascade structure of MMCs raises the problem of the circulating current. Due to chemical processes, aging effects, etc., the capacitance parameters of the upper and lower bridge arms will be asymmetric, which will introduce odd harmonics into the circulating current, increasing system losses and threatening the system reliability. To address this phenomenon, this paper proposes a circulating current suppression strategy with additional virtual impedance (VI) based on a repetitive controller (RC). The corresponding simulation models were built for the comparative study of different circulating current suppression strategies. The results show that the VI-RC circulating current suppression strategy can significantly reduce the odd and even harmonics in the circulating current under asymmetric conditions, and the total harmonic distortion (THD) of the bridge arm current is only 0.98%, which verifies the effectiveness of the proposed strategy.https://www.mdpi.com/2032-6653/14/7/181modular multilevel convertercapacitance parameter asymmetrycirculating current suppressionrepetitive controlvirtual impedance |
| spellingShingle | Mincheng Yao Hongyu Ni Feng Zhao Wenyuan Wang Wenxu Yan Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions World Electric Vehicle Journal modular multilevel converter capacitance parameter asymmetry circulating current suppression repetitive control virtual impedance |
| title | Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions |
| title_full | Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions |
| title_fullStr | Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions |
| title_full_unstemmed | Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions |
| title_short | Circulating Current Suppression Strategy Based on Virtual Impedance and Repetitive Controller for Modular Multilevel Converter Upper and Lower Bridge Arm Capacitance Parameter Asymmetry Conditions |
| title_sort | circulating current suppression strategy based on virtual impedance and repetitive controller for modular multilevel converter upper and lower bridge arm capacitance parameter asymmetry conditions |
| topic | modular multilevel converter capacitance parameter asymmetry circulating current suppression repetitive control virtual impedance |
| url | https://www.mdpi.com/2032-6653/14/7/181 |
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