公开(公告)号：US20180291876A1

公开(公告)日：2018-10-11

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 ,  F03D9/25 ,  G05B13/02 ,  G01R19/25 ,  H02K7/18 ,  H02P9/00

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.

公开(公告)号：US20220173591A1

公开(公告)日：2022-06-02

申请号：US17539944

申请日：2021-12-01

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Miguel Angel COVA ACOSTA ,  Piyush Gupta ,  Hans Abildgaard

IPC: H02J3/00 ,  H02J3/38 ,  G06F30/20

Abstract: Evaluating expected performance of a wind farm during a voltage event of a power grid, using a simulation tool. The tool initiates a simulated voltage event, at time, t0; initiates simulation of a subsequent response to the voltage event by the farm; retrieves information regarding an initial voltage state of a model of the farm, at t0, and predicts a final voltage state of the model of the wind farm, based on the retrieved information regarding the initial voltage state. At t0, a simulated output current, I, of the farm is lowered, based on the retrieved information and the predicted final voltage state, and a simulated output voltage, V, of the model of the farm, is monitored. The simulated output current, I, of the farm is subsequently adjusted, based on V, while monitoring V, I, and/or simulated output power of the model. Expected performance of the farm is then evaluated.