System and method for variable tip-speed-ratio control of a wind turbine
First Claim
1. A method for operating a wind turbine so as to increase power production, the method comprising:
- operating the wind turbine based on a fixed first tip speed ratio set point;
defining a first operating region associated with an unsaturated torque range;
defining a second operating region associated with a saturated torque range;
monitoring a torque output of the wind turbine; and
,actively changing the fixed first tip-speed-ratio set point of the wind turbine to a different, fixed second tip speed ratio set point when wind speed increases to a wind speed that is lower than rated speed at a lower than optimal tip speed ratio and the torque output reaches rated torque so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions and to allow the wind turbine to reach the rated speed at a lower speed than the fixed first tip speed ratio set point is capable of achieving while maintaining the rated torque with increasing wind speed.
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Accused Products
Abstract
The present subject matter is directed to a system and method for operating a wind turbine so as to increase power production by utilizing variable tip-speed-ratio control. In one embodiment, the method includes defining a first operating region associated with an unsaturated torque range and a second operating region associated with a saturated torque range. Further, the method includes monitoring a torque output of the wind turbine. The method also includes continuously adjusting a tip-speed-ratio set point of the wind turbine so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions.
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Citations
14 Claims
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1. A method for operating a wind turbine so as to increase power production, the method comprising:
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operating the wind turbine based on a fixed first tip speed ratio set point; defining a first operating region associated with an unsaturated torque range; defining a second operating region associated with a saturated torque range; monitoring a torque output of the wind turbine; and
,actively changing the fixed first tip-speed-ratio set point of the wind turbine to a different, fixed second tip speed ratio set point when wind speed increases to a wind speed that is lower than rated speed at a lower than optimal tip speed ratio and the torque output reaches rated torque so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions and to allow the wind turbine to reach the rated speed at a lower speed than the fixed first tip speed ratio set point is capable of achieving while maintaining the rated torque with increasing wind speed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for increasing power production of a wind turbine, the system comprising:
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one or more sensors configured to monitor a torque output of the wind turbine during a first operating region associated with a saturated torque range and a second operating region associated with an unsaturated torque range; a controller communicatively coupled to a processor, the processor configured to perform one or more operations, the operations comprising; operating the wind turbine based on a fixed first tip speed ratio set point; defining a first operating region associated with an unsaturated torque range; defining a second operating region associated with a saturated torque range; actively changing the fixed first tip-speed-ratio set point of the wind turbine to a different, fixed second tip speed ratio set point as wind speed increases to a wind speed that is lower than rated speed at a lower than optimal tip speed ratio and the torque output reaches rated torque so as to operate the wind turbine along a torque constraint boundary of the first and second operating regions and to allow the wind turbine to reach the rated speed at a lower speed than the fixed first tip speed ratio set point is capable of achieving while maintaining the rated torque with increasing wind speed. - View Dependent Claims (11, 12, 13, 14)
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Specification