公开(公告)号：US20230407841A1

公开(公告)日：2023-12-21

申请号：US18250962

申请日：2021-10-25

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Dan WU ,  Rubin PANNI ,  Kouroush NAYEBI

IPC: F03D7/02 ,  F03D9/25 ,  H02P9/10

CPC classification number: F03D7/028 ,  F03D9/25 ,  H02P9/102 ,  F05B2220/706 ,  H02P2101/15

Abstract: Aspects of the present invention relate to methods for controlling active power output of a wind turbine generator in response to a frequency event on a power network to which the wind turbine generator is connected, wherein the active power output of the wind turbine generator is limited to be below an upper active power limit and/or above a lower active power limit. The methods comprise determining and dispatching active power references to a controller of the wind turbine generator for controlling the wind turbine generator. The methods operate to ensure that the value of the active power reference immediately after the frequency event is within the allowable active power range, thereby avoiding any mismatch between the reference and the output that may cause a delay in returning to normal operation.

公开(公告)号：US20240421602A1

公开(公告)日：2024-12-19

申请号：US18718374

申请日：2022-10-31

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Dan WU ,  Mads Rajczyk SKJELMOSE ,  Kouroush NAYEBI

IPC: H02J3/46 ,  H02J3/00

Abstract: The invention relates to a power plant connected to an electrical grid and a method for controlling the power plant. The power plant comprises one or more power generators and at least one synchronous condenser. The power generators may be wind turbine generators, solar photovoltaic elements or other kinds of renewable power generators. During a deviation in frequency on the electrical grid, the synchronous condenser counteracts the frequency deviation, but it may also unintentional supply active power during the frequency event. The control method is controlling the active power supply from the power generators during the frequency events based only on the active power output from the power generators.

公开(公告)号：US20200350763A1

公开(公告)日：2020-11-05

申请号：US16956474

申请日：2018-11-20

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Mu WEI ,  Dan WU

IPC: H02J3/01 ,  H02M1/12 ,  F03D7/04

Abstract: Harmonics of a power output of a power plant at a point of common coupling between the power plant and a utility grid, wherein the power plant comprises a plurality of energy production units. The method comprises determining an electrical characteristic at the point of common coupling; determining the electrical characteristic at an output terminal of each of the energy production units and dispatching a control signal to at least one of the energy production units to control the electrical characteristic at an output terminal of the respective energy production units. The control signal is based on the measurement of the electrical characteristic at the point of common coupling and arranged for damping the harmonic of the power output of the power plant at the point of common coupling, wherein the control signal is determined on the basis of a predetermined prioritizing sequence of said electrical characteristic.

公开(公告)号：US20230089279A1

公开(公告)日：2023-03-23

申请号：US17801772

申请日：2021-02-03

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Dan WU ,  Germán TARNOWSKI ,  Torsten LUND ,  Kouroush NAYEBI ,  Mu WEI ,  Uffe C. MERRILD

IPC: H02J3/38 ,  H02J3/46

Abstract: Controlling a current injected to a power grid from a renewable power plant, in response to a voltage event in the power grid At least a current at a point of common coupling between the renewable power plant and the power grid is determined and provided to a power plant controller (PPC). The power PPC derives individual current setpoint corrections for at least some wind turbines, based on the determined current, and dispatches each derived current setpoint correction to wind turbine controllers of the corresponding wind turbines. The wind turbine controllers control a current output of the respective wind turbines, based on measurements of current and/or voltage at a point of connection between the wind turbine and an internal grid of the renewable power plant, and by taking into account the dispatched current setpoint correction .

公开(公告)号：US20240014663A1

公开(公告)日：2024-01-11

申请号：US18252874

申请日：2021-10-19

Applicant: VESTAS WIND SYSTEMS A/S

Inventor： Dan WU ,  Rubin PANNI ,  Henrik MØLLER

IPC: H02J3/38 ,  F03D7/02 ,  F03D7/04 ,  H02J3/24

CPC classification number: H02J3/381 ,  F03D7/0284 ,  F03D7/048 ,  H02J3/241 ,  F05B2270/1033 ,  F05B2270/107 ,  F05B2270/337 ,  H02J2300/24 ,  H02J2300/28 ,  H02J2300/40

Abstract: The invention relates to a method for controlling a power plant during an event which requires a change of the power produced by the power plant, wherein the power plant comprises a plurality of power generating units including at least one wind turbine generator, the method comprises determining the power reference dependent on an available power, changing the power reference to a modified power reference by a power variation in response to detecting a first event, memorizing a power level relating to the actual power production at a time occurrence of the first event, setting a maximum power limit to the memorized power level, limiting the modified power reference to the maximum power limit, and controlling the power produced by the wind turbines in accordance with the limited modified power reference.