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Turbine Performance
In an energy production calculation, a power curve supplied by the turbine supplier is used within the analysis.
Most wind turbines will shut down when the wind speed exceeds a certain limit. High wind speed shutdown events can cause significant fatigue loading. Therefore, to prevent repeated start up and shut down of the turbine when winds are close to the shutdown threshold, hysteresis is commonly introduced into the turbine control algorithm. Where a detailed description of the wind turbine cut-in and cut-out parameters are available, this is used to estimate the loss of production due to high wind hysteresis, by repeating the analysis using a power curve with a reduced cut-out wind speed. It is also necessary to adjust for any generic or site specific issues, which may mean that for a specific site the wind turbine will not perform in accordance with the supplied power curve.
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