公开(公告)号：US11098694B2

公开(公告)日：2021-08-24

申请号：US16222413

申请日：2018-12-17

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Gert Karmisholt Andersen ,  Lars Helle ,  Morteza Rabi ,  Poul Møhl Dyrlund

IPC: F03D7/00 ,  F03D7/02 ,  H02J3/38 ,  F03D9/25 ,  H02P9/00 ,  F03D17/00 ,  H02J3/46 ,  H02P101/15

Abstract: A method for use in controlling a wind turbine generator based on a condition of a power converter or a component forming part of a power converter in the wind turbine generator. The method comprises determining a condition of the power converter or the component forming part of a power converter, then comparing the condition to a predetermined threshold and modifying an operational parameter of the wind turbine generator if the condition substantially equals or exceeds the predetermined threshold. In particular, the invention proposes the wind turbine generator is derated if the condition of the power converter or the component forming part of a power converter substantially equals or exceeds the predetermined threshold.

公开(公告)号：US10700624B2

公开(公告)日：2020-06-30

申请号：US16326988

申请日：2017-08-11

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Gert Karmisholt Andersen ,  Kent Tange ,  Søren Andersen ,  Duy Duc Doan ,  Jens Peter Biltoft ,  Lars Helle ,  John Godsk Nielsen

IPC: H02P9/30 ,  H02P9/02 ,  H02P101/15 ,  F03D9/25 ,  H02M5/458 ,  H02M5/44 ,  H02M1/00

Abstract: A method of controlling a wind turbine generator (1) comprising an electrical generator (10) and a power converter (12), the power converter (12) comprising an electrical switch (14a, 14b) that is configured to process electrical power produced by the electrical generator (10), the method comprising: controlling an output from the electrical switch (14a, 14b) using a variable pulse-width modulated control signal, thereby to control characteristics of output power from the power converter (12); acquiring sample data (26) relating to an electronic signal within the wind turbine generator (1), wherein the sample data (26) is used for controlling the wind turbine generator (1); and dynamically adjusting a frequency (30) at which the sample data is acquired to synchronise data acquisition with a carrier frequency (24) of the control signal.

公开(公告)号：US10601310B2

公开(公告)日：2020-03-24

申请号：US15529840

申请日：2015-11-11

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Søren Andersen ,  Duy Duc Doan ,  Gert Karmisholt Andersen ,  Thomas Drljevic-Nielsen

IPC: H02M1/44 ,  F03D9/25 ,  H02M1/08 ,  H02M1/12 ,  H02M5/458 ,  H02M7/217 ,  H02M7/48

Abstract: A power generation system, wind turbine, and method of pulse width modulation (PWM) for power converters are disclosed. The method generally includes generating a substantially random distribution of timing values, applying a filter to the random distribution to produce a modified random distribution, and delivering PWM timing signals based on the modified random distribution to the power converters.

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.

公开(公告)号：US10135354B2

公开(公告)日：2018-11-20

申请号：US15541217

申请日：2015-12-08

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Søren Andersen ,  Gert Karmisholt Andersen ,  Duy Duc Doan ,  John Godsk Nielsen

IPC: H02M5/458 ,  F03D9/25 ,  H02M1/00 ,  H02P101/15

Abstract: A method of setting a reference DC-link voltage of a wind-turbine converter system is provided. At least at least one DC voltage demand from at least one generator-side inverter and at least one DC voltage demand are received from at least one grid-side inverter. A generator-side DC voltage demand value on the basis of the at least one DC voltage demand received from the at least one generator-side inverter. Also a grid-side DC voltage demand value is determined on the basis of the at least one DC voltage demand received from the at least one grid-side inverter. The highest DC voltage demand value out of the generator-side and grid-side DC voltage demand values is chosen. This chosen value corresponds to the set reference DC-link voltage.