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similare conform CZU
| SM ISO690:2012|
ОЛЕЩУК, В.И.; ЕРМУРАТСКИЙ, В.В.. Power Balanced Adjustment of Quad-Inverter Installation with Modified Discontinuous PWM. In: Problemele Energeticii Regionale. 2019, nr. 1-3(42), pp. 35-45. ISSN 1857-0070.
|Problemele Energeticii Regionale|
|Numărul 1-3(42) / 2019 / ISSN 1857-0070|
Purpose of this work is in the development and modification of control scheme and of basic algorithms of discontinuous space-vector modulation for synchronous and balanced regulation of mul-ti-inverter topology of six-phase open-end winding installation with four insulated dc sources. This purpose has been achieved due to including in the control and modulation scheme of specialized con-trol correlations connecting coefficients of modulation of inverters, required power ratio between dc-links, and voltages of the corresponding dc sources. So, basic novelty of this research is in the fact, that the elaborated and investigated control and modulation algorithms for installation on the base of inverters with discontinuous space-vector modulation (with both 300-non-switching intervals and 600-non-switching intervals) insure both required power sharing capability between dc links and advanced harmonic composition (without even harmonics and subharmonics) of spectra of the phase and line voltages of six-phase installation. Mutual comparison of behavior of system with two basic schemes of modified discontinuous pulsewidth modulation (PWM) has been executed. Investigation of harmonic composition of the phase voltage of multi-inverter system illustrates an important fact, that for the all analyzed control modes, connected with balanced adjustment of drive under different conditions, phase voltage of installation has symmetry for any control regimes, including control modes with frac-tional frequency ratios between switching frequency of converters and fundamental frequency of in-stallation, with absence in its spectra of undesirable subharmonics. Factor of minimization of subhar-monics in spectra of voltage and current of ac drives of different topologies is especially important for the medium-voltage medium-power installations on the basis of PWM converters.
voltage source inverter, induction motor, modulation strategy, voltage spectra, integral harmonic composition,
invertor de tensiune, motor electric asincron, strategie de control și modulare, compoziție spectrală de tensiune,
инвертор напряжения, асинхронный электродвигатель, стратегия управления и модуляции, спектральный состав напряжения