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A Novel Control Scheme for Current-Source-Converter-Based PMSG Wind Energy Conversion Systems

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3 Author(s)
Jingya Dai ; Dept. of Electr. & Comput. Eng., Ryerson Univ., Toronto, ON ; Xu, D.D. ; Bin Wu

A novel control scheme for permanent-magnet synchronous generator is proposed in this paper, where a current-source converter is employed as the bridge between the generator and the grid for high-power wind energy conversion systems. In these medium voltage (2.3-13.8 kV) level applications, current-source converters not only have inherent advantages, but also present some challenges for controller design due to the DC link choke and filter capacitors. The control strategy is developed to achieve better performances with improved dynamic response. By maintaining the grid-side converter modulation index at the highest possible level, the proposed control scheme reduces the DC link current to a minimum value to reduce converter conduction loss. The systempsilas dynamic performance is further improved by adopting generator-side power feedforward. Simulation and experimental results are provided to verify the proposed control scheme.

Published in:

Power Electronics, IEEE Transactions on  (Volume:24 ,  Issue: 4 )