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DOUBLE-DELTA-WINDING SYSTEM WITH NEUTRAL-POINT-CLAMPED CONVERTERS CONTROLLED BY SYNCHRONOUS MULTI-ZONE PWM

V. Oleschuk, Institute of Power Engineering of Moldova, Academy Str. 5, Kishinau, MD-2028, Moldova, V. Ermuratskii, Institute of Power Engineering of Moldova, Academy Str. 5, Kishinau, MD-2028, Moldova
2020 Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini  

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In this paper, algorithms of the universal scheme of synchronous multi-zone modulation have been developed and disseminated for adjustment of two neutral-clamped inverters of double-delta-winding system (which is perspective for application in high power variable speed ac drives), providing synchronization and symmetry of waveforms of inverterside voltage of power transformer for any control modes of operation including regimes with fractional relationship between the switching frequency of
more » ... rters and fundamental frequency of system. In this case inverter-side winding voltage of double-delta-winding system has quarter-wave symmetry, and its spectra do not contain even harmonics and undesirable subharmonics. Simulation results show behavior of system with two neutral-clamped inverters controlled by three basic versions of synchronous multi-zone modulation. References 9, figures 5, table.
doi:10.15407/publishing2020.56.059 fatcat:xph3se34tjhpddj3omfs7hxxim
Citation

V. Oleschuk, Institute of Power Engineering of Moldova, Academy Str. 5, Kishinau, MD-2028, Moldova, V. Ermuratskii, Institute of Power Engineering of Moldova, Academy Str. 5, Kishinau, MD-2028, Moldova. "DOUBLE-DELTA-WINDING SYSTEM WITH NEUTRAL-POINT-CLAMPED CONVERTERS CONTROLLED BY SYNCHRONOUS MULTI-ZONE PWM." Praci Institutu elektrodinamiki Nacionalanoi akademii nauk Ukraini 2020.56 (2020) 59-63