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A Dual Loop Control Strategy for Parallel Interleaved Three-Phase Four-Leg PWM Boost-Type Rectifier in UPS

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Warianty tytułu
Dwuobwodowa strategia sterowania trójfazowym prostownikiem PWM w układach UPS
Języki publikacji
This paper presents a dual-loop control strategy for parallel interleaved three-phase four-leg PWM boost-type rectifier in double conversion UPS. The interleaving method is adopted for its main benefit of harmonic cancellation. The current in the fourth leg is treated as a perturbation because the fourth leg is shared by rectifier and inverter, and the controller can be designed in a-b-c coordinate conveniently. The DCbus voltage feedback in outer control loop can be delayed by quarter-cycle to filter out the oscillating component when the load of UPS is unbalanced. The performance of proposed control scheme is verified by experimental results.
W artykule zaprezentowano strategię dwóch pętli sterowania trójfazowym czterogałęziowym prostownikiem PWM typu boost w układzie UPS. Wykorzystano metodę z przeplotem w celu eliminacji wpływu harmonicznych. (Dwuobwodowa strategia sterowania trójfazowym prostownikiem PWM w układach UPS)
Opis fizyczny
Bibliogr. 19 poz., rys.
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