NDLI: A Comprehensive Study of a Hybrid Modulation Technique for the Neutral-Point-Clamped Converter

Content Provider	IEEE Xplore Digital Library
Author	Zaragoza, J. Pou, J. Ceballos, S. Robles, E. Ibaez, P. Villate, J.L.
Copyright Year	1982
Abstract	This paper presents a hybrid modulation technique for the three-level neutral-point-clamped converter. A modulation strategy, based on two modulation signals per phase, was presented previously. This strategy completely removes the low-frequency voltage oscillations that appear at the neutral point (NP) in some operation conditions. However, it also has a major drawback: it significantly increases the switching losses of the converter. The proposal in this paper combines such a modulation strategy with sinusoidal pulsewidth modulation (SPWM). The main characteristic of this hybrid modulation is the reduction in switching losses at the cost of some low-frequency voltage oscillations at the NP. The amplitude of these oscillations can be controlled by varying the combination of the two strategies. The performance of the hybrid modulation is analyzed and compared with the original strategies. Power losses and oscillation amplitudes on the dc-link capacitors are evaluated. Experimental results show how the hybrid modulation performs by balancing the dc-link capacitors.
Sponsorship	IEEE Industrial Electronics Society
Starting Page	294
Ending Page	304
Page Count	11
File Size	3207650
File Format	PDF
ISSN	02780046
Volume Number	56
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2009-02-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phase modulation Switching loss Pulse modulation Capacitors Voltage Switching converters Proposals Space vector pulse width modulation Amplitude modulation Costs voltage balance Carrier-based modulation neutral-point-clamped (NPC) converter optimal compensator three-level converter
Content Type	Text
Resource Type	Article
Subject	Control and Systems Engineering Electrical and Electronic Engineering Computer Science Applications

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Analysis and Calculation of Zero-Sequence Voltage Considering Neutral-Point Potential Balancing in Three-Level NPC Converters

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