General Electric Company

Ge Infrastructure Technology, LLC

General Electric Renovables Espana, S.l.

Arne Koerber

Charudatta Subhash Mehendale

Leonardo Cesar Kammer

Thomas Franklin Perley

William E Holley

Jignesh Govindlal Gandhi

Ameet Shridhar Deshpande

Einar Vaughn Larsen

Govardhan Ganireddy

Mark Edward Cardinal

Hartmut Andreas Scholte-Wassink

Alfredo Sebastian Achilles

Brandon Shane Gerber

Thomas Frank Fric

Pranav Agarwal

Akshay Ambekar

Bernardo Adrian Movsichoff

Venkata Krishna Vadlamudi

Prashanth Kumar Reddy Vaddi

Shuang Gu

Sara Simonne Delport

Bernard P Landa

Ryan Andrew Risdon

Kasibhatla Satish Narayana

Mahesh Ayiranazhi Cailakam

Bernard Landa

William Edwin Holley

A method for mitigating loads acting on a rotor blade of a wind turbine includes determining, via a state estimator of a controller, a blade state estimation of the rotor blade. The method also includes reconstructing, via the controller, one or more loading signals of the rotor blade from the blade state estimation using modal analysis such that the loading signal(s) include a lead time. Further, the method includes comparing the loading signal(s) of the rotor blade to a loading threshold. Moreover, the method includes implementing a control action based on the comparison such that the lead time provided by the loading signal(s) allows the control action to take effect before a damaging load occurs on the rotor blade.

System and method for mitigating loads acting on a rotor blade of a wind turbine

Method for operating a wind turbine, the wind turbine including a wind characteristics sensor for measuring a wind characteristic and at least one wind turbine state sensor for measuring a state of the wind turbine, the method comprising: determining or adjusting () one or more wind characteristics relationships; and, performing () an operation phase, the operation phase including: measuring the wind characteristics with the wind characteristics sensor, thereby obtaining measured wind characteristics; measuring the state of the wind turbine with the at least one wind turbine state sensor and determining an estimated wind characteristics from the measured state of the wind turbine and parameters of the wind turbine; comparing the estimated wind characteristics to an expected wind characteristics determined from the measured wind characteristics, wherein the expected wind characteristics is determined based on the one or more wind characteristics relationships; and, operating or shutting down the wind turbine based at least in part on the comparison result.

Method for detecting irregular turbine operation using direct and indirect wind speed measurements

A method for optimizing power production of a wind turbine includes determining at least one operational constraint for the wind turbine. The method also includes operating the wind turbine with at least one operational constraint being activated. Further, the method includes varying a tip speed ratio for the wind turbine while the at least one operational constraint is activated so as to maximize a power coefficient of the wind turbine.

System and method for optimizing power output of a wind turbine during an operational constraint

A method for controlling a wind turbine based on aerodynamic performance maps that account for blade twist includes controlling the wind turbine based on at least one aerodynamic performance map. Further, the method includes determining at least one speed parameter of the wind turbine. Moreover, the method includes determining a blade torsional stiffness factor. Thus, the method further includes determining, via the processor, a twist correction factor for the aerodynamic performance map as a function of the at least one speed parameter and the blade torsional stiffness factor. The method then includes applying the twist correction factor to the at least one aerodynamic performance map to obtain an adjusted aerodynamic performance map. In addition, the method includes controlling the wind turbine based on the adjusted aerodynamic performance map.

Twist correction factor for aerodynamic performance map used in wind turbine control

Power generation stabilization control systems and methods include monitoring a frequency of the power grid. In response to detecting a frequency event occurring in the power grid, the method includes activating a control scheme in order to meet one or more grid requirements of the power grid. The control scheme includes increasing a power output of the wind turbine to, at least, a pre-event measured grid power. Further, the control scheme includes calculating a power correction factor for a power set point as a function of, at least, the frequency event. Moreover, the control scheme includes adjusting the power set point via the power correction factor such that the power output follows a predetermined trajectory. In addition, the control scheme includes controlling, via a turbine controller, the wind turbine based on the adjusted power set point for as long as the control scheme is activated.

Power generation stabilization control systems and methods

A method for operating a wind turbine during partial load operation includes determining a power output of the wind turbine. The method also includes determining whether the power output is below a rated power of the wind turbine. If the power output is at the rated power, the method includes maintaining a speed set point of the wind turbine equal to a rated speed set point. However, if the power output is below the rated power, then the method includes varying, via a controller, the speed set point of the wind turbine as a function of a torque of the wind turbine in a non-monotonic torque-speed relationship.

Variable rated speed control in partial load operation of a wind turbine

A method is provided for operation of a wind turbine having rotor blades attached to a hub, wherein a controller compensates for torsionally induced blade twist. The method includes operating the wind turbine according to a rated power output curve and maximum design thrust value, and periodically or continuously detecting for induced torsional twist in the rotor blades. Upon determination of torsional twist being induced in the rotor blades, the method includes adjusting the maximum thrust value in the control program to compensate for the induced twist. The wind turbine controller then controls pitch of the rotor blades as a function of the increased maximum thrust value so that power output of the wind turbine is not unnecessarily limited or increased by the induced twist on the rotor blades.

Methods for controlling wind turbine with thrust control twist compensation

Systems and methods to reduce tower oscillations in a wind turbine are presented. The method includes obtaining a rotor velocity. Furthermore, the method includes obtaining one or more parameters associated with a tower of the wind turbine. Further, the method includes determining a modified rotor velocity based on the one or more parameters. Moreover, the method includes determining a first pitch angle based on the modified rotor velocity. In addition, the method includes pitching one or more blades of the wind turbine based on the first pitch angle to reduce the tower oscillations.

Systems and methods to reduce tower oscillations in a wind turbine

Systems and methods for preventing excessive loading on a wind turbine are disclosed. The method includes: measuring an actual wind parameter upwind from the wind turbine using one or more sensors; providing the measured wind parameter to a processor; providing a plurality of wind turbine operating data to the processor; utilizing the plurality of operating data to determine an estimated wind turbine condition at the wind turbine; generating a control wind profile based on the actual wind parameter and the estimated wind turbine condition; and, implementing a control action based on the control wind profile to prevent excessive loading from acting on the wind turbine.

System and method for preventing excessive loading on a wind turbine

A method for operating a wind turbine is provided. The wind turbine includes a rotor adapted to rotate at an optimal speed. The method includes determining a turbulence parameter; and operating the wind turbine at a speed that is increased by a speed deviation amount as compared to the optimal speed. The speed deviation amount is dependent on the turbulence parameter. A wind turbine () having a controller () for controlling the wind turbine according to the disclosed method is also provided.

Method for operating a wind turbine

Methods are provided for controlling wind turbine loading. In one embodiment, a method includes the steps of determining a current thrust value for the wind turbine, calculating a thrust differential based on the current thrust value and a predetermined maximum thrust value, calculating a desired pitch offset value based on the thrust differential and a thrust sensitivity value, and adjusting a pitch of the wind turbine utilizing the pitch offset value.

Methods for controlling wind turbine loading

A method for controlling operation of a wind turbine included within a power generation and delivery system is described. The method includes receiving, by a controller, a power command signal, wherein the power command signal indicates recovery from the grid contingency event; and increasing, in a non-uniform manner, power injected into a grid by a power conversion assembly in response to the power command signal wherein the controller controls the power conversion assembly.

Method and systems for operating a wind turbine when recovering from a grid contingency event

Wind turbines and methods for controlling wind turbine loading are provided. In one embodiment, a method includes the steps of determining a current wind speed. The method further includes determining a tip speed ratio and a pitch angle that maximize a power coefficient under at least one of the following conditions: a thrust value is less than or equal to a pre-established maximum thrust, a generator speed value is less than or equal to a pre-established maximum generator speed, or a generator torque is less than or equal to a pre-established maximum generator torque. The method further includes calculating a desired generator speed value based on the current wind speed and a tip speed ratio. The method further includes calculating a desired generator power value based on the desired generator speed value.

Wind turbines and methods for controlling wind turbine loading

A resonance damping system for a wind turbine having a generator connected to a power grid, the resonance damping system comprising an adaptive resonance damper, operable to provide a control signal for the generator, wherein the variable torque signal of the adaptive resonance damper is automatically adjusted according to a parameter which represents a grid condition.

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Berlin, Germany

Arne Koerber