Fact Sheets 2020
Variability and Predictability of Large-Scale Wind Power
Wind power is generated by wind speeds that vary continually. This creates generation that is constantly fluctuating. The variations of wind power are smoothed as many wind turbines are aggregated in a power system. Aggregating many wind power plants will also improve the accuracy of forecasting output. Forecast accuracy is reasonable hours ahead, but will decrease for days ahead horizon. Forecast systems can also provide information about the uncertainty.