Extreme load control
AssigneeVestas Wind Systems A/S
InventorChris Spruce
Life of this patent
Estimating the term…
Abstract
Methods for calculating a maximum safe over-rated power demand for a wind turbine operating in non-standard conditions include the steps of determining a value indicative of a risk of exceeding an ultimate design load during operation in a standard operating condition, and establishing a maximum over-rated power demand corresponding to a maximum power that the turbine may produce under the non-standard operating condition without incurring an increased risk of exceeding the ultimate design load, with respect to operation in the standard condition. A method of over-rating a wind turbine, a wind turbine controller, a wind turbine and a wind power plant are also claimed.
Claims19
A method for calculating a maximum safe over-rated power demand for a wind turbine operating in a non-standard operating condition, the method comprising:
- determining a value indicative of a first risk of exceeding an ultimate design load during operation of the wind turbine in a standard operating condition;
- establishing a maximum over-rated power demand corresponding to a maximum power that the wind turbine may produce under the non-standard operating condition at a second risk of exceeding the ultimate design load, wherein establishing the maximum over-rated power demand comprises:
- determining, for each of a plurality of over-rated power demands, a respective value indicative of the second risk;
- and
- selecting, from the plurality of over-rated power demands, a largest over-rated power demand for which the second risk is not greater than the first risk;
- and
- generating, in accordance with the maximum over-rated demand, an over-rating control signal to be applied to the wind turbine.
A method of over-rating a wind turbine, the method comprising:
- determining an operating condition of the wind turbine;
- determining, using a look-up table, a maximum safe over-rated power demand for the wind turbine for the operating condition, wherein the look-up table is populated by calculating a maximum over-rated power demand for each of a plurality of non-standard operating conditions of the wind turbine, the calculating comprising:
- determining a value indicative of a first risk of exceeding an ultimate design load during operation in a standard operating condition of the wind turbine;
- and
- for each non-standard operating condition, establishing a maximum over-rated power demand corresponding to a maximum power that the wind turbine may produce under the non-standard operating condition at a second risk of exceeding the ultimate design load that is not greater than the first risk;
- and
- generating, in accordance with the maximum safe over-rated power demand for the operating condition, an over-rating control signal to be applied to the wind turbine.
A controller for a wind power plant, the controller comprising one or more computer processors configured to perform an operation of over-rating a wind turbine in the wind power plant, the operation comprising:
- determining an operating condition of the wind turbine;
- determining, using a look-up table, a maximum safe over-rated power demand for the wind turbine for the operating condition, wherein the look-up table is populated by calculating a maximum over-rated power demand for each of a plurality of non-standard operating conditions of the wind turbine, the calculating comprising:
- determining a value indicative of a first risk of exceeding an ultimate design load during operation in a standard operating condition of the wind turbine;
- and
- for each non-standard operating condition, establishing a maximum over-rated power demand corresponding to a maximum power that the wind turbine may produce under the non-standard operating condition at a second risk of exceeding the ultimate design load that is not greater than the first risk;
- and
- generating, in accordance with the maximum safe over-rated power demand for the operating condition, an over-rating control signal to be applied to the wind turbine.
A method comprising:
- determining, for each extreme event of a plurality of extreme events, a respective maximum value of an ultimate load experienced by a wind turbine during operation in the extreme event;
- determining a value indicative of a first risk of the wind turbine exceeding an ultimate design load during operation in a standard operating condition, wherein determining the value indicative of the first risk comprises selecting a largest of the determined maximum values;
- determining a first maximum over-rated power value that the wind turbine may produce under a first non-standard operating condition at a second risk of exceeding the ultimate design load that is not greater than the first risk;
- and
- generating, in accordance with the first maximum over-rated power value, an over-rating control signal to be applied to the wind turbine.
Dependencies are inferred from the claim text.