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Automatic Command Mode Transition Strategy of Direct Power Control for PMSG MV Offshore Wind Turbines
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 Title & Authors
Automatic Command Mode Transition Strategy of Direct Power Control for PMSG MV Offshore Wind Turbines
Kwon, Gookmin; Suh, Yongsug;
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 Abstract
In this study, an automatic command mode transition strategy of direct power control (DPC) is proposed for permanent magnet synchronous generators (PMSGs) medium-voltage (MV) offshore wind turbines (WTs). Benchmarking against the control methods are performed based on a three-level neutral-point-clamped (NPC) back-to-back type voltage source converter (VSC). The ramping rate criterion of complex power is utilized to select the switching vector in DPC for a three-level NPC converter. With a grid command and an MPPT mode transition strategy, the proposed control method automatically controls the generated output power to satisfy a grid requirement from the hierarchical wind farm controller. The automatic command mode transition strategy of DPC is confirmed through PLECS simulations based on Matlab. The simulation result of the automatic mode transition strategy shows that the proposed control method of VOC and DPC achieves a much shorter transient time of generated output power than the conventional control methods of MPPT and VOC under a step response. The proposed control method helps provide a good dynamic performance for PMSGs MV offshore WTs, thereby generating high quality output power.
 Keywords
Direct power control;Dynamic response;Mode transition;Maximum power point tracking;Wind power system;
 Language
English
 Cited by
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