Hybrid Space Vector PWM Strategy for Three-Phase VIENNA Rectifiers

• Published in: Sensors (Basel, Switzerland) Vol. 22; no. 17; p. 6607
• Main Authors: Wang, Yaodong, Li, Yinghui, Guo, Xu, Huang, Shun
• Format: Journal Article
• Language: English
• Published: Basel MDPI AG 01-09-2022; MDPI
• Subjects: current distortion; discontinuous pulse width modulation; Distortion; Electric potential; Mutation; Phase current; Power supply; Pulse duration modulation; Simulation methods; Space vector modulation; space vector pulse width modulation; Vienna rectifier; Voltage
• ISSN: 1424-8220; 1424-8220
• DOI: 10.3390/s22176607

Vienna rectifiers are widely used, but they have problems of zero-crossing current distortion and midpoint potential imbalance. In this paper, an improved hybrid modulation strategy is proposed. According to the phase difference between the reference voltage vector and the input current vector, the dynamic current crossing distortion sector is divided at each phase current crossing, and the discontinuous pulse width modulation strategy is adopted in the sector to suppress the redundant small vector mutation and improve the current crossing distortion. To solve the problem of midpoint potential balance, a space vector modulation strategy is adopted outside the sector to control the midpoint potential balance by allocating the time of small vector action by voltage balance factor. Finally, the effectiveness of the proposed method is verified by simulation and experiment.