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Energies 2017, 10(5), 592; doi:10.3390/en10050592

Control Strategy of Single-Phase Three Level Neutral Point Clamped Cascaded Rectifier

School of Electrical Engineering, Southwest Jiaotong University, Chengdu 610031, China
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Author to whom correspondence should be addressed.
Academic Editor: Jose Fernando Alves da Silva
Received: 20 March 2017 / Revised: 21 April 2017 / Accepted: 22 April 2017 / Published: 28 April 2017
(This article belongs to the Special Issue Power Electronics in Power Quality)
View Full-Text   |   Download PDF [3938 KB, uploaded 28 April 2017]   |  

Abstract

Single-phase 3-level neutral point clamped cascaded rectifier (3LNPC-CR) has been successfully made its way into traction drive system as a high-voltage traction converter. In this passage, the control issue of the 3LNPC-CR is considered. A transient current control strategy, combined with proportional integral (PI) controllers, is adopted to achieve unity power factor, satisfactory sinusoidal grid current, regulated overall dc voltage, and even efficient voltage balance between each module. Besides, with regard to the instinct voltage fluctuation problem among dc-link capacitors in one 3-level neutral point clamped (3LNPC) rectifier module, a phase shift carrier space vector pulse width modulation (PSC-SVPWM) worked along with a reasonable redundancy selection scheme is addressed. In addition, two auxiliary balancing circuits for a single-phase 3LNPC rectifier is proposed. The voltage balancing capacity of these internal-module balancing schemes are analyzed and compared. Finally, the control performance of these proposed strategies are verified by simulations and experiments. View Full-Text
Keywords: 3-level neutral point clamped cascaded rectifier (3LNPC-CR); phase shift carrier space vector pulse width modulation (PSC-SVPWM); capacitor voltage balancing; mutual-module voltage balancing 3-level neutral point clamped cascaded rectifier (3LNPC-CR); phase shift carrier space vector pulse width modulation (PSC-SVPWM); capacitor voltage balancing; mutual-module voltage balancing
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

He, X.; Lin, X.; Peng, X.; Han, P.; Shu, Z.; Gao, S. Control Strategy of Single-Phase Three Level Neutral Point Clamped Cascaded Rectifier. Energies 2017, 10, 592.

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