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In DFIG drivetrain, traditional two-level (2L) rotor-side converter (RSC) suffers from high thermal stress during its operation with high rotor current at low slip frequency. This paper presents the application of a three-level (3L) ANPC converter as the RSC in DFIG drivetrain. The thermal performance of the 3L-ANPC RSC is analyzed in details through numerical simulator approach for a wide operating...
The three-level neutral point-clamped (NPC) converter has attracted much attention in high-power medium-voltage applications, but it is well-known that the NPC topology suffers from unequal power loss distribution among its semiconductor devices. The power loss unbalance problem becomes especially severe when the converter is operating at low fundamental frequencies. To overcome the loss unbalance...
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