DOI: https://doi.org/10.15407/techned2017.01.035
IMPROVEMENT OF THE INPUT CURRENT WAVEFORMS OF A MATRIX CONVERTER IN THE CASE OF UNBALANCED POWER SUPPLY VOLTAGES AND UNBALANCED LOAD
Journal |
Tekhnichna elektrodynamika |
Publisher |
Institute of Electrodynamics National Academy of Science of Ukraine |
ISSN |
1607-7970 (print), 2218-1903 (online) |
Issue |
No 1, 2017 (January/February) |
Pages |
35 – 43 |
Authors V.M. Mykhalskyi, V.M. Sobolev, V.V. Chopyk, I.A. Shapoval Institute of Electrodynamics of the National Academy of Sciences of Ukraine, Peremohy pr., 56, Kyiv, 03057, Ukraine, e-mail:
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Abstract
Matrix converter control method which is based on the general algorithm of input reactive power control and aims to improve the quality of input currents in conditions of unbalanced load and input voltages has been proposed and studied. For this purpose, the process of formation of the matrix converter space vector input current has been considered as a result of the addition of two independent dynamic modulation methods of the input current reactive component. The first one is based on the determination of the transfer ratio of output current into input current under balanced load and unbalanced power supply taking into account symmetric component of negative sequence of the input voltage, and the second one is under unbalanced load taking into account reactive part of symmetric component of negative sequence component of the output current. Operating limits, where the proposed modulation methods are fully realized, have been defined. The effectiveness of the proposed approach confirmed by simulation of matrix converter input currents based on actual switching conditions and discrete formation of these currents. References 13, figures 5.
Key words: matrix converter, input current, reactive power, unbalanced load.
Received: 22.11.2016 Accepted: 23.11.2016 Published: 19.01.2017
References
1. Mykhalskyi V.M., Sobolev V.M., Chopyk V.V., Shapoval I.A. Control of a matrix converter input reactive power. Tekhnichna Elektrodynamika. 2014. No 3. C. 33–41. 2. Mykhalskyi V.M., Sobolev V.M., Chopyk V.V., Shapoval I.A. Improvement of the input current waveforms of a matrix converter under unbalanced and/or nonsinusoidal input voltage conditions. Tekhnichna Elektrodynamika. 2015. No 3. Pp. 17–24. (Ukr) 3. Mykhalskyi V.M., Sobolev V.M., Chopyk V.V., Shapoval I.A. Improvement of the input current waveforms of a matrix converter in the case of balanced sinusoidal power supply voltages and unbalanced load. Tekhnichna Elektrodynamika. 2016. No 2. Pp. 29–34. (Ukr)
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