Triple line-voltage cascaded VIENNA converter applied as the medium-voltage rectifier

Jia, Zou; Wang, Cong; Cheng, Hong; Linan, Hou

doi:10.1109/iecon.2017.8216277

Cited by 4 publications

(1 citation statement)

References 14 publications

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“…Benefit from these excellent performances, multilevel converter is considered as a kind of popular and competitive topology and has been commercialized in a lot of products [4], [5]. However, the dominant drawback of the traditional multilevel converter is that it requires a bulky and heavy multi-winding line-frequency transformer as the front stage, which occupies a large space in the system [6]. For such scenarios, the line frequency transformer-less cascaded multilevel converter (TCMC) has emerged rapidly all over the world.…”

Section: Introductionmentioning

confidence: 99%

Hybrid Control Scheme for Three-Phase Multilevel Unidirectional Rectifier Under Unbalanced Input Voltages

et al. 2019

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In this paper, a hybrid control scheme for three-phase Y-connected multilevel bridgeless rectifier (TMBR) under unbalanced input voltages is presented, based on the mathematical model of the TMBR topology, with the emphasis on the discussion for power fluctuation suppression, dc-link capacitor voltages balancing and input current zero-crossing distortion elimination. With the hybrid control scheme, the power fluctuation can be suppressed and three-phase input currents can flow with a purely sinusoidal waveform, besides, three-phase dc-link capacitor voltages can be controlled to be equal to each other under unbalanced input voltages. Moreover, the proposed hybrid control scheme is applicable to all other threephase three wire multilevel unidirectional rectifiers under unbalanced input voltages. The validity of the proposed control scheme is demonstrated by the mathematical deduction. The simulations and experimental results verify that, with the proposed control scheme, TMBR can stably operate not only under balanced input voltages but also under unbalanced input voltages. INDEX TERMS Three-phase multilevel bridgeless rectifier, hybrid control scheme, unbalanced input voltages.

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Section: Introductionmentioning

confidence: 99%