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US 10,094,360 B2Granted
Control method for a wind turbine
AssigneeAcciona Windpower, S.A.
InventorsTeresa Arlaban Gabeiras, Diego Otamendi Claramunt, Jose Miguel Garcia Sayes, Alfonso Ruiz Aldama, Alberto Garcia Barace, Oscar Luquin Hermoso de Mendoza, Alejandro Gonzalez Murua, Miguel Nunez Polo
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Abstract
The present invention relates to a control method for a wind turbine whereby it is possible to detect situations in which the machine is not working at its maximum performance point, wherein in addition, once these situations have been detected, the control method of the present invention allows to perform an automatic correction of the control parameters and to return the turbine to its optimum operating point.
Claims29
A control method for a wind turbine, said turbine comprising:
- a rotor with a substantially horizontal axis and with at least one blade,
- a nacelle with an anemometer, and
- a control system, and
- the control method comprises:
- a step of calculating a mean value (λmed) of a parameter indicative of the tip speed ratio, λ, in the variable speed area, based on a signal of the rotational speed of the rotor, ω and a signal of the wind speed, v,
- a step of comparing, the mean value (λmed) of the parameter indicative of the tip speed ratio in the variable speed area with a target value (λopt) of the parameter indicative of the tip speed ratio,
- a step of modification of at least one parameter of the control system based on the result of the step of comparison between the mean value (λmed) of the parameter indicative of the tip speed ratio in the variable speed area and the target value (λopt) of the parameter indicative of the tip speed ratio, and
- a step of controlling the rotational speed of the rotor (ω) within an variable speed area comprised between a preset minimum value (ωmin) and a preset maximum value (ωmax) of rotational speed of the rotor (ω) so that a tip speed ratio, λ, is maintained substantially equal to a target value (λopt) of the tip speed ratio,
- wherein the control parameter to be modified in the modification step is at least one of the following:
- a ratio (Kopt) between the torque required to the wind turbine (T) and the square of the rotational speed of the wind turbine (ω2) in the variable speed area
- an offset of nacelle orientation.
8 more elements
A control system for a wind turbine, said turbine comprising:
- a rotor with a substantially horizontal axis and with at least one blade,
- a nacelle with an anemometer, and
- a wind turbine control method that comprises:
- a step of calculating a mean value (λmed) of a parameter indicative of the tip speed ratio, λ, in the variable speed area, based on a signal of the rotational speed of the rotor, ω and a signal of the wind speed, v,
- a step of comparing the mean value (λmed) of the parameter indicative of the tip speed ratio in the variable speed area with a target value (λopt) of the parameter indicative of the speed ratio, and
- a step of modification of at least one parameter of the control system based on the result of the step of comparison between the mean value (λmed) of the parameter indicative of the tip speed ratio in the variable speed area and the target value (λopt) of the parameter indicative of the tip speed ratio, and
- a step of controlling the rotational speed of the rotor (ω) within an variable speed area comprised between a preset minimum value (ωmin) and a preset maximum value (ωmax) of rotational speed of the rotor (ω) so that a tip speed ratio, λ, is maintained substantially equal to a target value (λopt) of the tip speed ratio,
- wherein the control parameter to be modified in the modification step is at least one of the following:
- a ratio (Kopt) between the torque required to the wind turbine (T) and the square of the rotational speed of the wind turbine (ω2) in the variable speed area,
- an offset of nacelle orientation.
7 more elements
A wind turbine comprising:
- a rotor with a substantially horizontal axis and with at least one blade,
- a nacelle with an anemometer, and
- a control system, and
- the control system further comprises:
- a step of calculating a mean value (λmed) of a parameter indicative of the tip speed ratio, λ, in the variable speed area, based on a signal of the rotational speed of the rotor, ω and a signal of the wind speed, v,
- a step of comparing the mean value of the parameter indicative of the tip speed ratio in the variable speed area with a target value (λopt) of the parameter indicative of the tip speed ratio
- a step of modification of at least one parameter of the control system based on the result of the step of comparison between the mean value (λmed) of the parameter indicative of the tip speed ratio in the variable speed area and the target value (λopt) of the parameter indicative of the tip speed ratio, and
- a step of controlling the rotational speed of the rotor (ω) within an variable speed area comprised between a preset minimum value (ωmin) and a preset maximum value (ωmax) of rotational speed of the rotor (ω) so that a tip speed ratio, λ, is maintained substantially equal to a target value (λopt) of the tip Speed ratio,
- wherein the control parameter to be modified in the modification step is at least one of the following:
- a ratio (Kopt) between the torque required to the wind turbine (T) and the square of the rotational speed of the wind turbine (ω2) in the variable speed area,
- an offset of nacelle orientation.
8 more elements
Dependencies are inferred from the claim text.