| Autor: |
Vorontsov, A. G., Pronin, M. V., Soloviev, A. P., Glushakov, V. V., Rozbitsky, G. G., Dikun, I. A. |
| Zdroj: |
Russian Electrical Engineering; Jan2024, Vol. 95 Issue 1, p41-50, 10p |
| Abstrakt: |
Modular multilevel converters (MMСs) constructed on low-voltage half bridge transistor–capacitor blocks (TCBs) allow one to create high-voltage installations without transformers. Such converters are used in wind power plants, power transmission, and electric drives. The energy reserves in an MMC are distributed among many TCBs. The voltages and currents at the input and output of the MMC have small distortions, but control systems are complex, A decrease in the frequency of currents at the input or output of the MMC leads to an increase in voltage ripples of TCB capacitors. To limit pulsations, internal contour currents are introduced into the MMC, and zero sequence components are used in control devices. The article presents high-speed models of systems with MMC, and the efficiency of control algorithms for an inverter with a passive load, as well as an electric drive with MMC and an induction motor is evaluated. A three-phase current corrector is proposed, which reduces their amplitude and reduces distortion. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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