koz"Вестник Северо-Казахстанского университета имени Манаша Козыбаева"Bulletin of Manash Kozybayev North Kazakhstan University2958-003X2958-0048М. Қозыбаев атындағы СҚУkoz-242Research ArticleТЕХНИЧЕСКИЕ НАУКИTECHNICAL SCIENCESСТРАТЕГИИ КОММУТАЦИИ МНОГОУРОВНЕВОГО ИНВЕРТОРАMULTI-LEVEL INVERTER SWITCHING STRATEGIESМолдахметовС. С.MoldakhmetovS.

Петропавловск

Petropavlovsk

ПетровП. А.PetrovP.

Петропавловск

Petropavlovsk

АтыгаевТ. Б.AtygayevT.

Петропавловск

Petropavlovsk

КолесниковА.KolesnikovA.

Йоэнсуу

Joensuu

СКГУ им. М. КозыбаеваКазахстанNKSU named after M. KozybaevKazakhstanООО «Арбонаут»Финляндия«Arbonaut» LtdFinland20201308202102 (47)238246Copyright © Молдахметов С.С., Петров П.А., Атыгаев Т.Б., Колесников А., 20212021Молдахметов С.С., Петров П.А., Атыгаев Т.Б., Колесников А.Moldakhmetov S., Petrov P., Atygayev T., Kolesnikov A.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vestnik.ku.edu.kz/jour/article/view/242

В данной статье исследованы методики коммутации ступеней многоуровневого инвертора. Данные методики используют широтно-импульсную модуляцию для коммутации, которая получается путем сравнения эталонного синусоидального сигнала и последовательности треугольных импульсов. В статье описаны алгоритмы получения управляющей последовательности импульсов и исследовано как та или иная стратегия позволяет уменьшить коэффициент гармонических составляющих выходного напряжения инвертора. Для этого в среде Simulink произведено моделирование каждой из стратегий для различных частот. На основе результатов моделирования получена зависимость коэффициента нелинейных искажений от частоты несущего колебания для разных стратегий коммутации. Моделирование производилось без фильтрации выходного напряжения инвертора, и с использованием ФНЧ. Помимо этого произведено экспериментальное исследование шестиуровневого ШИМ-инвертора. При помощи анализатора электрической энегии Fluke 435-II полученны осциллограммы и спектрограммы инвертора. Выявлены гармоники выходного напряжения выделяющиеся по мощности из всего спектра.

In the article, the methods of switching stages of a multi-level inverter are studied. These techniques use pulse-width modulation for switching, which is obtained by comparing a reference sinusoidal signal and a sequence of triangular pulses. The article describes algorithms for obtaining a control sequence of pulses and examines how a particular strategy can reduce the coefficient of harmonic components of the output voltage of the inverter. To do this, Simulink simulates each of the strategies for different frequencies. Based on the simulation results, the dependence of the coefficient of nonlinear distortion on the frequency of the carrier oscillation for different switching strategies is obtained. The simulation was performed without filtering the output voltage of the inverter, and with the use of a low-pass filter. In addition, an experimental study of a sixlevel PWM inverter was performed. Using the Fluke 435-II electrical energy analyzer, oscillograms and spectrograms of the inverter are obtained. Harmonics of the output voltage are detected that differ in power from the entire spectrum.

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The authors declare that there are no conflicts of interest present.