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公开(公告)号：US11245261B2
公开(公告)日：2022-02-08
申请号：US16065591
申请日：2016-12-12
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Dumitru-Mihai Valcan , Jorge Martinez Garcia , Kouroush Nayebi , Jesper Sandberg Thomsen , Martin Ansbjerg Kjær
Abstract: A method for controlling a wind power plant comprising a plurality of wind turbine generators, wherein the method comprises: deriving an estimated value for electrical losses in the wind power plant, deriving a measured value for electrical losses in the wind power plant, based on a difference between an aggregated power production from the plurality of wind turbine generators and a power measurement at a point of common coupling; applying the estimated value for electrical losses and the measured value for electrical losses in an active power control loop, comprising a regulator; and controlling by means of the active power control loop an active power production of the wind power plant at the point of common coupling.
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公开(公告)号：US10364796B2
公开(公告)日：2019-07-30
申请号：US15022876
申请日：2014-09-16
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Per Brath , Martin Ansbjerg Kjær , Jesper Sandberg Thomsen
Abstract: The invention relates to a method of controlling a wind turbine, the wind turbine comprising wind turbine blades attached to a rotor hub and a control system for pitching the blades relative to the hub. The method comprises providing wake sectors assigned to different wind directions and providing a normal pitch schedule to control an output parameter of the wind turbine (e.g. power, rotational speed), comprising pitch reference values as a function of the wind speed and at least one of the parameters of thrust coefficient Ct and axial induction factor a. Further, is provided a modified pitch schedule to control a modified output parameter of the wind turbine, comprising pitch reference values in dependence of the wind speed and at least one modified parameter of the thrust coefficient and/or the axial induction factor. Upon receiving indications of a wind speed and a wind direction at the wind turbine is determined a pitch reference value for the wind turbine blades according to the normal pitch schedule if the wind direction falls outside the wake sector and otherwise according to the modified pitch schedule. The wind turbine is then controlled according to the pitch reference value. The invention further relates to a method of controlling the wind turbines in a wind park, wherein each wind turbine in the park is controlled locally according to the above mentioned control method.
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公开(公告)号：US10958071B2
公开(公告)日：2021-03-23
申请号：US16956923
申请日：2018-11-20
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Manoj Gupta , Ravi Kumar , Janakiraman Sivasankaran , Thomas Schmidt Grau , Martin Ansbjerg Kjær , Kouroush Nayebi , John Godsk Nielsen , Jesper Sandberg Thomsen
Abstract: A method for operating a renewable energy power plant comprising a plurality of renewable energy generators. The method comprises: identifying a predetermined condition of the renewable energy power plant, of the grid, or of the connection between the renewable energy power plant and the grid, the predetermined condition indicating a weak grid interconnection between the renewable energy power plant and the grid; and controlling each renewable energy generator in an adaptive active power mode in response to recovery of the grid from a voltage deviation. The adaptive active power mode comprises: determining a thermal capacity of a chopper resistor of the renewable energy generator; calculating, based upon the determined thermal capacity, a limit level of rate of change of active power output that may be implemented by the renewable energy generator; and operating the renewable energy generator to output active power at the calculated rate of change limit level.
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公开(公告)号：US10557459B2
公开(公告)日：2020-02-11
申请号：US15508267
申请日：2015-09-03
Applicant: Vestas Wind Systems A/S
Inventor： Martin Ansbjerg Kjær
Abstract: The invention relates to techniques for verifying a nacelle yaw position sensor installed on a wind turbine and for taking restorative action to control the nacelle yaw position. The invention relates to a method performing the comprising determining a first absolute wind direction signal associated with the first wind turbine; determining a second absolute wind signal direction signal associated with the plurality of other wind turbines; comparing the two wind direction signals; and issuing a nacelle yaw position sensor fault signal if the first signal is beyond a predetermined error range of the second signal. A benefit of the invention is that it enables the detection of an inaccurate nacelle yaw sensor without direct measurement or inspection.
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公开(公告)号：US10151301B2
公开(公告)日：2018-12-11
申请号：US14762028
申请日：2013-01-25
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Fabio Caponetti , Martin Ansbjerg Kjær
Abstract: A method of controlling a wind turbine is described. The method involves forecasting the temperature evolution of a component of the wind turbine based upon the current operating parameters of the wind turbine and upon a required power output; predicting from the temperature forecast a future alarm event caused by the temperature of the component exceeding a first threshold level or falling below a second threshold level; and adjusting the operating parameters of the wind turbine to control the temperature evolution of the component thereby to avoid or delay the predicted alarm event.
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Patent Agency Ranking
公开(公告)号：US20170241409A1
公开(公告)日：2017-08-24
申请号：US15508267
申请日：2015-09-03
Applicant: Vestas Wind Systems A/S
Inventor： Martin Ansbjerg Kjær
CPC classification number: F03D17/00 , F03D7/00 , F03D7/0204 , F03D7/048 , F03D9/257 , F05B2260/821 , F05B2270/321 , F05B2270/329 , F05B2270/404 , G01P13/02 , G01P21/00 , Y02E10/723 , Y02E10/725
Abstract: The invention relates to techniques for verifying a nacelle yaw position sensor installed on a wind turbine and for taking restorative action to control the nacelle yaw position. The invention relates to a method performing the comprising determining a first absolute wind direction signal associated with the first wind turbine; determining a second absolute wind signal direction signal associated with the plurality of other wind turbines; comparing the two wind direction signals; and issuing a nacelle yaw position sensor fault signal if the first signal is beyond a predetermined error range of the second signal. A benefit of the invention is that it enables the detection of an inaccurate nacelle yaw sensor without direct measurement or inspection.
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7.发明授权Method of determining individual set points in a power plant controller, and a power plant controller 有权确定发电厂控制器中的各个设定点的方法和发电厂控制器公开(公告)号：US09407186B2
公开(公告)日：2016-08-02
申请号：US14428320
申请日：2013-09-05
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Mehrdad Babazadeh , Saed Ehsani , Martin Ansbjerg Kjær , Henrik B. Møller
CPC classification number: H02P9/02 , H02J3/16 , H02J3/386 , Y02E10/763 , Y02E40/34
Abstract: This invention relates to a method and a power plant controller arranged to carry out the method. The method is on an intelligent dispatching of the power production to wind turbines and optional compensation equipment of a wind power plant, as the power producing units of a wind power plant. The invention relates to a case where the requested produced power is less than the total capacity of the power plant, and the invention relates to utilizing this situation to dispatch set points to the wind turbines and the compensation equipment in a flexible way. This flexibility may increase the wind turbines' life time, help in scheduling maintenance and expand the electrical operating range of the wind power plant. The determination of the set points on active and reactive power is a combined determination of both set points for each of the energy producing units of the wind power plant.
Abstract translation: 本发明涉及一种布置成执行该方法的方法和电厂控制器。 该方法是对风力发电厂的风力发电机组和风力发电厂的发电机组的可选补偿设备进行智能调度。 本发明涉及所请求的生产能力小于发电厂的总容量的情况，本发明涉及利用这种情况以灵活的方式将设定点分配给风力涡轮机和补偿设备。 这种灵活性可能会增加风力发电机的使用寿命，有助于安排维护和扩大风力发电厂的电气运行范围。 有功和无功功率的设定点的确定是对风力发电厂的每个能量产生单元的两个设定点的组合确定。
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公开(公告)号：US10704534B2
公开(公告)日：2020-07-07
申请号：US16143818
申请日：2018-09-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Martin Ansbjerg Kjær
Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.
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公开(公告)号：US10669990B2
公开(公告)日：2020-06-02
申请号：US15735513
申请日：2016-06-09
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Martin Ansbjerg Kjær , Jesper Sandberg Thomsen , Jacob Krogh Kristoffersen , Jacob Deleuran Grunnet , Eik Herbsleb
IPC: F03D7/02
Abstract: The invention relates to a control system for a wind turbine. The wind turbine comprises a power generator configured to generate power dependent on a power reference and a pitch system configured to adjust the pitch of a blade of the wind turbine dependent on a pitch request. The control system comprises a controller configured to determine the pitch request dependent on an adjustable gain. A gain scheduler comprised by the control system is configured to set the adjustable gain to an increased gain value if a rate of change of the power reference, e.g. an external power reference, exceeds a threshold.
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公开(公告)号：US10570885B2
公开(公告)日：2020-02-25
申请号：US16143818
申请日：2018-09-27
Applicant: VESTAS WIND SYSTEMS A/S
Inventor： Ciprian Biris , Uffe C. Merrild , Leif Svinth Christensen , Martin Ansbjerg Kjær
Abstract: Controlling a wind turbine during a grid fault where the grid voltage drops below a nominal grid voltage. After detection of a grid fault, the total current limit for the power converter output is increased to a total maximum overload current limit. Depending on whether active or reactive current generation is prioritized, an active or reactive current reference is determined. The active current reference is determined in a way so that a reduction in active power production due to the grid voltage drop is minimized and based on the condition that the vector-sum of the active output current and the reactive output current is limited according to the total maximum overload current limit, and a maximum period of time is determined in which the power converter can be controlled based on the active/reactive current references. Afterwards the power converter is controlled based on the active and reactive current references.
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