A system and method for pressure based load measurement are provided. The system and method measure at least one pressure differential on an airfoil and determine at least one aerodynamic load associated with the at least one pressure differential. The determined at least one load is used to modify
A system and method for pressure based load measurement are provided. The system and method measure at least one pressure differential on an airfoil and determine at least one aerodynamic load associated with the at least one pressure differential. The determined at least one load is used to modify characteristics of the airfoil to increase efficiency and/or avoid damage. The determined at least one aerodynamic load may be further utilized to balance and/or optimize loads at the airfoil, estimate a load distribution along the airfoil used to derive other metrics about the airfoil, and/or used in a distributed control system to increase efficiency and/or reduce damage to, e.g., one or more wind turbines.
대표청구항▼
1. A method for balancing aerodynamic loads, the method comprising: determining, by a controller, a plurality of pressure differentials, wherein each of the plurality of pressure differentials corresponds to a difference in pressure between a first pressure location and a second pressure location on
1. A method for balancing aerodynamic loads, the method comprising: determining, by a controller, a plurality of pressure differentials, wherein each of the plurality of pressure differentials corresponds to a difference in pressure between a first pressure location and a second pressure location on each of a plurality of wind turbine blades of a wind turbine;determining, by the controller, a plurality of aerodynamic loads, wherein each of the plurality of aerodynamic loads corresponds to each of the plurality of wind turbine blades and is determined based on a combination of a corresponding pressure differential and at least two of: a rotation speed of the wind turbine, an ambient air pressure, an ambient air temperature, and a pitch angle of the respective wind turbine blade;determining, by the controller, a first aerodynamic load of a first wind turbine blade is out of balance with a second aerodynamic load of a second wind turbine blade; andin response to determining the first aerodynamic load is out of balance, modifying, by the controller, at least one characteristic of the first wind turbine blade. 2. The method of claim 1, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: modifying a pitch angle of the first wind turbine blade; modifying a yaw angle of the wind turbine; and modifying a yaw angle of the first wind turbine blade. 3. The method of claim 1, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: extending a tip portion of the first wind turbine blade; and retracting the tip portion of the first wind turbine blade. 4. The method of claim 1, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: deploying an air deflector on the first wind turbine blade; and retracting the air deflector on the first wind turbine blade. 5. The method of claim 1 further comprising: defining a group of blades comprising a plurality of wind turbine blades including the first wind turbine blade;in response to the modifying the at least one characteristic of the first wind turbine blade, modifying the at least one characteristic of each blade in the defined group. 6. The method of claim 1, wherein the modifying the at least one characteristic of the first wind turbine blade is performed while the plurality of wind turbine blades are rotating. 7. A method for optimizing aerodynamic loads, the method comprising: determining, by a controller, a plurality of pressure differentials, wherein each of the plurality of pressure differentials corresponds to a difference in pressure between a first pressure location and a second pressure location on each of a plurality of wind turbine blades;determining, by the controller, a plurality of aerodynamic loads based on the plurality of pressure differentials, wherein each of the plurality of aerodynamic loads corresponds to each of the plurality of wind turbine blades and is determined based on a combination of a corresponding pressure differential and at least two of: a rotation speed of the wind turbine, an ambient air pressure, an ambient air temperature, and a pitch angle of the respective wind turbine blade;determining, by the controller, a first aerodynamic load of the plurality of aerodynamic loads is not within a predetermined range of acceptable loads; andin response to determining the first aerodynamic load is not within the predetermined range of acceptable loads, modifying, by the controller, at least one characteristic of a first wind turbine blade of the plurality of wind turbine blades. 8. The method of claim 7, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: modifying a pitch angle of the first wind turbine blade; modifying a yaw angle of the wind turbine; and modifying a yaw angle of the first wind turbine blade. 9. The method of claim 7, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: extending a tip portion of the first wind turbine blade; and retracting the tip portion of the first wind turbine blade. 10. The method of claim 7, wherein the modifying the at least one characteristic of the first wind turbine blade comprises one of: deploying an air deflector on the first wind turbine blade; and retracting the air deflector on the first wind turbine blade. 11. The method of claim 7 further comprising: defining a group of blades comprising one or more wind turbine blades of the plurality of wind turbine blades including the first wind turbine blade;in response to the modifying the at least one characteristic of the first wind turbine blade, modifying the at least one characteristic of each blade in defined group. 12. The method of claim 7, wherein the modifying the at least one characteristic of the first wind turbine blade is performed while the plurality of wind turbine blades is rotating. 13. A wind turbine comprising: a hub;a plurality of wind turbine blades connected to and arranged about the hub, wherein each wind turbine blade of the plurality of wind turbine blades comprises: a first pressure sensing orifice arranged on a bottom surface of the wind turbine blade; anda second pressure sensing orifice arranged on a top surface of the wind turbine blade; andat least one controller, wherein the at least one controller is configured to determine at least one aerodynamic force associated with each of the plurality of wind turbine blades based on a difference in pressure between a location of the first pressure sensing orifice and a location of the second pressure sensing orifice at each wind turbine blade in combination with at least two of: a rotation speed of the wind turbine, an ambient air pressure, an ambient air temperature, and a pitch angle of the respective wind turbine blade, and wherein the controller is further configured to modify at least one characteristic of a first wind turbine blade in response to determining a first aerodynamic force associated with the first wind turbine blade is out of balance with a second aerodynamic force associated with a second wind turbine blade. 14. The wind turbine of claim 13, wherein the at least one controller is further configured to modify, in response to determining the first aerodynamic force is out of balance, one of: a pitch angle of the first wind turbine blade; a yaw angle of the wind turbine; and a yaw angle of the first wind turbine blade. 15. The wind turbine of claim 13, wherein the at least one controller is further configured to perform, in response to determining the first aerodynamic force is out of balance, one of: extending a tip portion of the first wind turbine blade; and retracting the tip portion of the first wind turbine blade. 16. The wind turbine of claim 13, wherein the at least one controller is further configured to perform, in response to determining the first aerodynamic force is out of balance, one of: deploying an air deflector on the first wind turbine blade; and retracting the air deflector on the first wind turbine blade. 17. The wind turbine of claim 13, wherein the at least one controller is further configured to modify the at least one characteristic of the first wind turbine blade while the plurality of wind turbine blades is rotating.
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이 특허에 인용된 특허 (4)
Herr, Stefan; Leclair, Ryan Michael; Winslow, Christopher; Simpson, Alexander; Haertel, Carlos; Maeder, Thierry, Method and apparatus for measuring air flow condition at a wind turbine blade.
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