公开(公告)号：US20230344230A1

公开(公告)日：2023-10-26

申请号：US17832223

申请日：2022-06-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk NIELSEN ,  Torsten Lund ,  Hamid Soltani ,  Gert Karmishoit Andersen

IPC: H02J3/16

CPC classification number: H02J3/16 ,  H02J2300/28

Abstract: A grid side inverter system includes a grid side inverter, a phase locked loop controller arranged to determine a phase of a dq-frame dependent on a monitored grid voltage vector in the dq-frame and a reference grid voltage vector in the dq-frame, a current reference decision unit arranged to generate a reduction of at least one of an active and a reactive current reference, wherein a decision to generate the reduction is based on an electrical parameter relating to the phase difference of the monitored grid voltage vector and the PLL vector, a current controller arranged to determine control signals for the grid side inverter for controlling generation of active and reactive power to the grid dependent on the active and reactive current references and monitored active and a reactive grid currents in the dq-frame.

公开(公告)号：US11901734B2

公开(公告)日：2024-02-13

申请号：US17832223

申请日：2022-06-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： John Godsk Nielsen ,  Torsten Lund ,  Hamid Soltani ,  Gert Karmisholt Andersen

IPC: H02J3/16

CPC classification number: H02J3/16 ,  H02J2300/28

Abstract: A grid side inverter system includes a grid side inverter, a phase locked loop controller arranged to determine a phase of a dq-frame dependent on a monitored grid voltage vector in the dq-frame and a reference grid voltage vector in the dq-frame, a current reference decision unit arranged to generate a reduction of at least one of an active and a reactive current reference, wherein a decision to generate the reduction is based on an electrical parameter relating to the phase difference of the monitored grid voltage vector and the PLL vector, a current controller arranged to determine control signals for the grid side inverter for controlling generation of active and reactive power to the grid dependent on the active and reactive current references and monitored active and a reactive grid currents in the dq-frame.

公开(公告)号：US12212274B2

公开(公告)日：2025-01-28

申请号：US18040640

申请日：2021-08-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Torsten Lund ,  Hamid Soltani ,  Gert Karmisholt Andersen ,  Germán Claudio Tarnowski

IPC: H02P9/00 ,  H02P9/04 ,  H02P9/10 ,  H02P101/15

Abstract: Aspects of the present invention relate to a method for reducing high torque levels and/or high rates of change of torque in a wind turbine generator that comprises a machine-side converter and a line-side converter connected by a DC link, and, wherein the line-side converter is operated according to a virtual synchronous machine control scheme. The method comprises: determining a generator torque; determining a torque surplus indicating the amount that the generator torque exceeds a torque limit; determining an active power surplus corresponding to the torque surplus; controlling the line-side converter according to the virtual synchronous machine control scheme using an input parameter configured to reduce the active power output of the line side converter by the active power surplus.

公开(公告)号：US11894672B2

公开(公告)日：2024-02-06

申请号：US18004879

申请日：2021-07-06

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Luis Miguel Calhau Gonçalves ,  Kenneth G. Hansen ,  Hans Christian Bisgaard-Clausen ,  Duy Duc Doan ,  Hamid Soltani ,  Poul Møhl Dyrlund ,  Kent Tange

IPC: H02H7/06 ,  H02H3/00 ,  H02J3/38 ,  H02P9/00 ,  H02P101/15

CPC classification number: H02H7/06 ,  H02H3/006 ,  H02J3/381 ,  H02P9/006 ,  H02P2101/15

Abstract: A system for a wind turbine that includes a protection system interfaced to a circuit breaker system and a sensing system. The protection system is configured to determine an operational mode of the wind turbine by monitoring at least two parameters determine a parameter set comprising a plurality of operational parameters based on a determined operational mode, and an associated set of expected values corresponding to the parameter set, determine actual values corresponding to the determined parameter set, identify a fault condition in the event that the determined set of actual values of the operational parameters do not correspond to the determined set of expected values of the operational parameters, and implement a protection action based on the identified fault condition.

公开(公告)号：US11411519B2

公开(公告)日：2022-08-09

申请号：US16590475

申请日：2019-10-02

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Poul Møhl Dyrlund ,  Gert Karmisholt Andersen ,  Torsten Lund ,  Hamid Soltani

IPC: G05B19/048 ,  H02P9/00 ,  G05B15/02 ,  H02P101/15

Abstract: The present invention relates to a method of controlling a doubly fed induction generator wind turbine converter system in case of a sub-synchronous resonance event, the method comprising the steps of detecting the sub-synchronous resonance event, and switching from a first control mode to a second control mode in response to detecting the predetermined event, wherein the second control mode comprises the step of setting at least one rotor current controller parameter on the basis of a generator speed of the doubly fed induction generator. The predetermined event may also be a fault ride through event. The present invention further relates to a doubly fed induction generator wind turbine converter system being capable of handling such events.