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Information × Registration Number 0220U101888, 0119U102517 , R & D reports Title Improving the energy efficiency of DC and AC power supply systems through the use of modular multi-level converters. popup.stage_title Head Nerubatskyi Volodymyr P., Кандидат технічних наук Registration Date 27-02-2020 Organization Ukrainian State University of Railway Transport popup.description2  Improving the energy efficiency of semiconductor frequency converters is achieved through the use of multilevel topologies that allow the use of smaller semiconductor switches, which in turn have less static and dynamic power losses. This, in turn, achieves a reduction in total power losses, an improvement in the efficiency and emission of higher harmonics of currents and voltages to load. Modulation algorithms that increase the quality parameters of output voltage and output current in standalone voltage inverters are investigated. The spectra of higher harmonics of the output currents from multilevel autonomous voltage inverters are analyzed while implementing various modulation algorithms. It is possible to implement a compensation algorithm for controlling multilevel voltage inverters, which allows for mutual compensation of higher harmonics of the input currents, which achieves an improvement in the ripple coefficient of the input current. The results of modeling in the form of energy characteristics and radiation indicators of higher harmonics of current and voltage to the load and power supply network are obtained. Product Description popup.authors Hordiienko Denys A. Plakhtii Oleksandr A. Khoruzhevskyi Hryhorii A. popup.nrat_date 2020-04-02 Close