2011•IEEE Transactions on Power ElectronicsRequires access

LVRT Scheme of PMSG Wind Power Systems Based on Feedback Linearization

Ki-Hong Kim, Yoon-Cheul Jeung, Dong‐Choon Lee, Heung-Geun Kim

Abstract

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 ωmand 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.

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Key concepts: Permanent magnet synchronous generator, Feedback linearization, Control theory (sociology), Controller (irrigation), Linearization, Wind power, Generator (circuit theory), Voltage