Modular Multilevel Converter with Wireless Magnetic Power Decoupling for Three-phase MV Adjustable-speed Drivesopen access
- Authors
- Tawfik, Mohamed Atef; Irfan, Mohammad Sameer; Ahmed, Ashraf; Park, Joung-Hu
- Issue Date
- Sep-2022
- Publisher
- CHINA ELECTRIC POWER RESEARCH INST
- Keywords
- Capacitors; Transformers; Wireless communication; Wireless sensor networks; Windings; Magnetic resonance imaging; Switches; Modular multilevel converter; power decoupling; submodule capacitor voltage ripple; variable-speed drives; wireless high-frequency transformer
- Citation
- CSEE JOURNAL OF POWER AND ENERGY SYSTEMS, v.8, no.5, pp.1497 - 1507
- Journal Title
- CSEE JOURNAL OF POWER AND ENERGY SYSTEMS
- Volume
- 8
- Number
- 5
- Start Page
- 1497
- End Page
- 1507
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/42952
- DOI
- 10.17775/CSEEJPES.2020.06180
- ISSN
- 2096-0042
- Abstract
- In this paper, we propose a modular multilevel converter (MMC) with a wireless magnetic power decoupling approach suitable for medium-voltage high-power variable-speed machine drives. Our proposed power decoupling approach is independent of the operating frequency, which solves the issue of wide fluctuations of low-frequency voltage ripple components in submodule (SM) capacitors, especially at low-speed operations without using any ripple power capacitor. Employing wireless magnetic elements reduces the amount of high-voltage insulation between the transformer windings, resulting in a significant reduction in the overall size of the system. The basic idea of our proposed approach is to magnetically couple the instantaneous three-phase ripple power of each of the three adjacent-arm SMs. The proposed MMC is free from low-frequency capacitors, resulting in enhanced system reliability, volume, and lifetime. The operation principles of the proposed MMC are explained, and a control design is introduced. The performance of the proposed scheme was verified via simulation and experimental tests.
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