Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control
The modular multilevel converter (MMC) has unique topological characteristics and has gained significant popularity in medium-voltage applications. However, during MMC operation, circulating currents inevitably arise, exacerbating arm current distortion, causing additional losses in the converter sy...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-02-01
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| Series: | World Electric Vehicle Journal |
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| Online Access: | https://www.mdpi.com/2032-6653/16/3/134 |
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| _version_ | 1849340137000927232 |
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| author | Xin Gu Wenxuan Zhao Guozheng Zhang Xuqing Yao Xuefeng Jin Wei Chen Chen Li |
| author_facet | Xin Gu Wenxuan Zhao Guozheng Zhang Xuqing Yao Xuefeng Jin Wei Chen Chen Li |
| author_sort | Xin Gu |
| collection | DOAJ |
| description | The modular multilevel converter (MMC) has unique topological characteristics and has gained significant popularity in medium-voltage applications. However, during MMC operation, circulating currents inevitably arise, exacerbating arm current distortion, causing additional losses in the converter system, and thereby increasing system costs. This paper primarily addresses the circulating current issue in traditional half-bridge MMCs by introducing a control strategy combining model predictive control and proportional resonance controllers. First, a value function is established using a discrete prediction model of the output current, followed by a rolling optimization that combines a capacitor voltage sorting strategy to determine the duty cycles of each submodule in the arm. Secondly, a proportional resonance controller (PR) is designed to eliminate the second- and fourth-order harmonic components in the circulating current. Finally, the output of the resonance controller is used to correct the duty cycles, which are then compared with the PWM triangular carrier to generate more switching actions that suppress the circulating current. The effectiveness of the strategy is experimentally verified. The results show that the proposed method yields better output characteristics, smaller capacitor voltage fluctuations, and significantly suppresses harmonic components in the arm currents. |
| format | Article |
| id | doaj-art-163d23ecfb084e6c97881fc3dd504c97 |
| institution | Kabale University |
| issn | 2032-6653 |
| language | English |
| publishDate | 2025-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | World Electric Vehicle Journal |
| spelling | doaj-art-163d23ecfb084e6c97881fc3dd504c972025-08-20T03:43:58ZengMDPI AGWorld Electric Vehicle Journal2032-66532025-02-0116313410.3390/wevj16030134Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive ControlXin Gu0Wenxuan Zhao1Guozheng Zhang2Xuqing Yao3Xuefeng Jin4Wei Chen5Chen Li6School of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaSchool of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaSchool of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaSchool of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaSchool of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaSchool of Electrical Engineering, Tiangong University, Tianjin 300387, ChinaAdvanced Electrical Equipment Innovation Center, Zhejiang University, Hangzhou 311107, ChinaThe modular multilevel converter (MMC) has unique topological characteristics and has gained significant popularity in medium-voltage applications. However, during MMC operation, circulating currents inevitably arise, exacerbating arm current distortion, causing additional losses in the converter system, and thereby increasing system costs. This paper primarily addresses the circulating current issue in traditional half-bridge MMCs by introducing a control strategy combining model predictive control and proportional resonance controllers. First, a value function is established using a discrete prediction model of the output current, followed by a rolling optimization that combines a capacitor voltage sorting strategy to determine the duty cycles of each submodule in the arm. Secondly, a proportional resonance controller (PR) is designed to eliminate the second- and fourth-order harmonic components in the circulating current. Finally, the output of the resonance controller is used to correct the duty cycles, which are then compared with the PWM triangular carrier to generate more switching actions that suppress the circulating current. The effectiveness of the strategy is experimentally verified. The results show that the proposed method yields better output characteristics, smaller capacitor voltage fluctuations, and significantly suppresses harmonic components in the arm currents.https://www.mdpi.com/2032-6653/16/3/134modular multilevel converterhybrid model predictive controlcirculating current suppressionproportional resonant controller |
| spellingShingle | Xin Gu Wenxuan Zhao Guozheng Zhang Xuqing Yao Xuefeng Jin Wei Chen Chen Li Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control World Electric Vehicle Journal modular multilevel converter hybrid model predictive control circulating current suppression proportional resonant controller |
| title | Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control |
| title_full | Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control |
| title_fullStr | Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control |
| title_full_unstemmed | Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control |
| title_short | Circulating Current Suppression in Modular Multilevel Converters Based on Hybrid Model Predictive Control |
| title_sort | circulating current suppression in modular multilevel converters based on hybrid model predictive control |
| topic | modular multilevel converter hybrid model predictive control circulating current suppression proportional resonant controller |
| url | https://www.mdpi.com/2032-6653/16/3/134 |
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