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An Improved Method for Capacitor Voltage Balancing Control and Capacitance Monitoring in Modular Multilevel Converter | ||
| International Journal of Industrial Electronics Control and Optimization | ||
| مقاله 2، دوره 9، شماره 2، شهریور 2026، صفحه 131-144 اصل مقاله (6.38 M) | ||
| نوع مقاله: Research Articles | ||
| شناسه دیجیتال (DOI): 10.22111/ieco.2026.53855.1729 | ||
| نویسندگان | ||
| Mohsen Rahmani Haredasht1؛ S. Masoud Barakati* 2؛ Mohammad Bagheri Hashkavayi3 | ||
| 1Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran. Taftan Power Development and Transmission Engineering Company, Mashhad, Iran | ||
| 2Faculty of Engineering, University of Sistan and Baluchestan, Zahedan, Iran. | ||
| 3Department of Electrical Engineering, Yuan Ze University, Taoyuan, 32003, Taiwan | ||
| چکیده | ||
| The modular multi-level converter (MMC) is widely recognized as one of the most promising structures for high-voltage and high-power applications due to its fully modular design, lack of bulky output filters, and independence from multiple DC sources. However, the large number of flying capacitors within the MMC architecture presents significant challenges to system reliability, particularly in maintaining accurate voltage balance. Traditional methods to ensure voltage balancing require numerous voltage sensors, which increase both the cost and complexity of the system, potentially undermining its reliability. This paper introduces an innovative capacitor voltage balancing method aimed at enhancing the reliability of the MMC. By using a single voltage sensor for both half-bridge submodules (HB-SM), the proposed method simplifies the system architecture while ensuring precise voltage estimation through a simple sensor configuration. Furthermore, the unique placement of the voltage sensor facilitates a capacitance monitoring technique that accurately assesses the health of the capacitors, thereby further enhancing the converter's reliability. The proposed method's efficiency has been confirmed by simulation and experimental investigations in various scenarios. | ||
| کلیدواژهها | ||
| Multilevel Converter (MMC)؛ Capacitor Voltages Balance؛ Half-bridge submodules(HB-SM)؛ capacitance monitoring | ||
| مراجع | ||
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