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Improving Synchronization Reliability for Active Rectifiers with the Mains

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Abstract

The operation of a synchronization unit based on the principle of phase-locked frequency tuning has been considered. The classical method to measure the supply voltage implemented on the basis of phase-locked frequency tuning is more appropriate than the method of symmetric components, which is more complicated in design, operation, and commissioning. The phase-locked loop frequency method is successfully used in synchronization units for valve frequency converters if the amplitude of a reverse phase sequence is more than 20%. The dependence of the transient process time of a measured voltage variable in the synchronization device on the level of supply voltage asymmetry determined by the voltage component amplitude of a reverse phase sequence has been obtained. The area of application of a phase-locked frequency system can be enlarged due to the use of a selective Butterworth filter and a correct choice of its Q-factor.

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Authors and Affiliations

  1. Snezhinsk Works of Special Electric Machines, 456770, Snezhinsk, Russia

    A. V. Kurnaev

  2. South Ural State University, 454080, Chelyabinsk, Russia

    G. A. Gavritukhin & M. A. Grigorev

Authors
  1. A. V. Kurnaev
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  2. G. A. Gavritukhin
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  3. M. A. Grigorev
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Correspondence to A. V. Kurnaev.

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Translated by M. Astrov

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Kurnaev, A.V., Gavritukhin, G.A. & Grigorev, M.A. Improving Synchronization Reliability for Active Rectifiers with the Mains. Russ. Electr. Engin. 92, 253–257 (2021). https://doi.org/10.3103/S1068371221050060

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  • DOI: https://doi.org/10.3103/S1068371221050060

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