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：US10158230B2

公开(公告)日：2018-12-18

申请号：US14899694

申请日：2013-06-18

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Amit Kumar Gupta ,  Manoj Gupta ,  Dilip Kumar Guru

IPC: H02J3/01 ,  H02M1/12 ,  H02J3/18 ,  H02J3/38 ,  G01R19/00 ,  G01R27/02 ,  H02M7/44

Abstract: The invention relates to a control system for compensating undesired electrical harmonics on an electrical grid. Part of the control system referred to as a harmonic compensator is operatively connected with a power inverter of a power producing unit supplying power to the grid. Another part of the control system, referred to as an impedance detector, is operatively connected to a point of coupling to which point one or more power producing units are connected. The impedance detector is configured to scan impedances as a function of frequency to identify frequencies of impedance peaks which peaks are indicative of resonance frequencies. The determined resonance frequencies are supplied to one or more the harmonic compensators. A compensator determines control signals to the inverter which causes the inverter to inject compensation currents to the grid which currents will damp currents oscillating at or close to the determined resonance frequency.

公开(公告)号：US09593667B2

公开(公告)日：2017-03-14

申请号：US14366837

申请日：2012-12-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Amit Kumar Gupta ,  Manoj Gupta

IPC: F03D7/00 ,  F03D9/00 ,  H02J3/38 ,  H02M5/458 ,  H02P101/15

CPC classification number: F03D7/00 ,  F03D9/255 ,  F03D9/257 ,  H02J3/386 ,  H02M5/458 ,  H02P2101/15 ,  Y02E10/763

Abstract: A wind turbine generator is disclosed herein. In a described embodiment, the wind turbine generator comprises an electrical generator 101 configured to generate AC signals, a plurality of power converters 110,112,111 operated by a gating signal with each power converter configured to convert the AC signals from the electrical generator 101 into fixed frequency AC signals. The wind turbine generator further comprises a controller configured to enter a fault mode when a grid voltage falls outside an acceptable threshold, and during the fault mode the controller is configured to provide a reactive current reference dependant on a grid voltage distant from the wind turbine generator. A method of controlling a wind turbine generator is also disclosed.

Abstract translation: 本文公开了一种风力涡轮发电机。 在所描述的实施例中，风力涡轮发电机包括被配置为产生AC信号的发电机101，由门控信号操作的多个电力转换器110,112,111，每个功率转换器被配置为将来自发电机101的AC信号转换成固定频率AC 信号。 风力涡轮发电机还包括控制器，其配置为当电网电压落在可接受的阈值之外时进入故障模式，并且在故障模式期间，控制器被配置为提供取决于远离风力涡轮发电机的电网电压的无功电流参考 。 还公开了一种控制风力涡轮发电机的方法。

公开(公告)号：US20140339830A1

公开(公告)日：2014-11-20

申请号：US14366837

申请日：2012-12-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Amit Kumar Gupta ,  Manoj Gupta

IPC: F03D7/00 ,  F03D9/00

CPC classification number: F03D7/00 ,  F03D9/255 ,  F03D9/257 ,  H02J3/386 ,  H02M5/458 ,  H02P2101/15 ,  Y02E10/763

Abstract: A wind turbine generator is disclosed herein. In a described embodiment, the wind turbine generator comprises an electrical generator 101 configured to generate AC signals, a plurality of power converters 110,112,111 operated by a gating signal with each power converter configured to convert the AC signals from the electrical generator 101 into fixed frequency AC signals. The wind turbine generator further comprises a controller configured to enter a fault mode when a grid voltage falls outside an acceptable threshold, and during the fault mode the controller is configured to provide a reactive current reference dependant on a grid voltage distant from the wind turbine generator. A method of controlling a wind turbine generator is also disclosed.

Abstract translation: 本文公开了一种风力涡轮发电机。 在所描述的实施例中，风力涡轮发电机包括被配置为产生AC信号的发电机101，由选通信号操作的多个功率转换器110,112,111，每个功率转换器被配置为将来自发电机101的AC信号转换成固定频率AC 信号。 风力涡轮发电机还包括控制器，其配置为当电网电压落在可接受的阈值之外时进入故障模式，并且在故障模式期间，控制器被配置为提供取决于远离风力涡轮发电机的电网电压的无功电流参考 。 还公开了一种控制风力涡轮发电机的方法。