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LVRT Scheme of PMSG Wind Power Systems Based on Feedback Linearization

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4 Author(s)
Ki-Hong Kim ; LG Electronics Inc., Changwon, Korea ; Yoon-Cheul Jeung ; Dong-Choon Lee ; Heung-Geun Kim

This paper proposes a low-voltage ride-through scheme for the permanent magnet synchronous generator (PMSG) wind power system at the grid voltage sag. The dc-link voltage is controlled by the generator-side converter instead of the grid-side converter (GSC). Considering the nonlinear relationship between the generator speed ωm and the dc-link voltage Vdc , a dc-link voltage controller is designed using a feedback linearization theory. The GSC controls the grid active power for a maximum power point tracking. The validity of this control algorithm has been verified by simulation and experimental results for a reduced-scale PMSG wind turbine simulator.

Published in:

IEEE Transactions on Power Electronics  (Volume:27 ,  Issue: 5 )