A randomized voltage vector switching scheme for three-level power inverters

In this paper, a feasibility study of a randomized space vector switching scheme for three-level inverters is reported. Based on the traditional space vector concept for pulse width modulation (PWM) inverters, the sequence of the space vector is randomized in this scheme. The overall vector, resulti...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2002-01, Vol.17 (1), p.94-100
Main Authors: Lee, C.K., Hui, S.Y.R., Shu-HungChung, H., Shrivastava, Y.
Format: Article
Language:English
Subjects:
Acoustic applications
Acoustic noise
Capacitors
Electric potential
Electrical equipment
Electronics
Inverters
Mathematical analysis
Power system harmonics
Pulse duration modulation
Pulse inverters
Pulse width modulation
Pulse width modulation inverters
Space vector pulse width modulation
Switching
Switching frequency
Vectors (mathematics)
Voltage
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Summary:In this paper, a feasibility study of a randomized space vector switching scheme for three-level inverters is reported. Based on the traditional space vector concept for pulse width modulation (PWM) inverters, the sequence of the space vector is randomized in this scheme. The overall vector, resulting from the randomization, is mathematically identical to that of the traditional space vector. It has been found that the randomized scheme can effectively spread the switching noise over a wide frequency range and at the same time keep the steady-state link capacitor voltage balanced. The proposed scheme has been implemented in real time in a digital controller and its features have been experimentally confirmed.
ISSN:0885-8993
1941-0107
DOI:10.1109/63.988674