公开(公告)号：US10544778B2

公开(公告)日：2020-01-28

申请号：US15573931

申请日：2016-06-16

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Yi Zhou ,  Gert Karmisholt Andersen ,  Manoj Gupta ,  Vajira Suminda Ganepola ,  Ciprian Biris ,  Miguel Angel Cova Acosta

IPC: F03D7/02 ,  G01R23/02 ,  F03D9/25 ,  G05B13/02 ,  H02K7/18 ,  H02P9/00 ,  G01R19/25

Abstract: A method is provided of protecting a wind turbine with a doubly-fed induction generator (DFIG) against a sub-synchronous resonance (SSR) event acting on the wind turbine. A plurality of power-output values or current-output values is measured over a given period of time that corresponds to a measurement cycle. It is determined whether power-output values or current-output-values measured in the at-least-one measurement cycle are indicative of an SSR-event critical for further operation of the wind turbine. The wind turbine is shut down if the measured power-output values or current-output values are indeed indicative of an SSR-event critical for operation of the wind turbine.