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Title: Hybrid modulation strategy for the Vienna rectifier
Authors: Molligoda, Devinda
Ceballos, Salvador
Pou, Josep
Satpathi, Kuntal
Sasongko, Firman
Gajanayake, Chandana
Gupta, Amit
Keywords: Engineering::Electrical and electronic engineering::Power electronics
Issue Date: 2021
Source: Molligoda, D., Ceballos, S., Pou, J., Satpathi, K., Sasongko, F., Gajanayake, C. & Gupta, A. (2021). Hybrid modulation strategy for the Vienna rectifier. IEEE Transactions On Power Electronics, 37(2), 1283-1295.
Journal: IEEE Transactions on Power Electronics 
Abstract: The Vienna rectifier can produce three voltage levels, however only the connection to the neutral-point is fully controllable using the bidirectional switches. When the neutral-point voltage is not imposed in a phase-leg, the polarity of the pulses generated depends on the diode that is conducting in that phase-leg, which is defined by the current direction. As a result, the voltage pulses generated can go in the opposite direction to what is demanded by the controller, and the current becomes distorted. This can be mitigated by injecting a particular zero sequence so that the reference voltage is clamped to the neutral-point during the intervals where the current of a phase leg has the opposite sign than its reference voltage. However, the converter is at risk of entering into overmodulation when operating with high modulation indices. In this paper, a hybrid modulation strategy is introduced where a calculated minimal amount of reactive current depending on the operating conditions is injected to avoid overmodulation. The reduction of reactive current required compared to the state-of-the-art solutions is up to 100% in certain operating conditions. With the proposed method, the Vienna rectifier can operate in a wide range of power factors without compromising the quality of the source currents. The concept is verified by simulation and in a 1-kW Vienna rectifier experimental setup.
ISSN: 0885-8993
DOI: 10.1109/TPEL.2021.3103766
Rights: © 2021 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The published version is available at:
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles

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