An Investigation on the Active-Power Variations of Wind Farms

Variation is one of the most important inherent characteristics of wind power. Very few common methods exist to quantify the variations. This presents difficulty for the security and efficiency operations of power systems if large-scale wind power is included. Based on the analysis results from the large amounts of field measurements from nine aggregated wind farms, it is found that the t location-scale distribution and the Laplace distribution are able to cope with this problem. A systemic methodology is proposed accordingly. Therefore, the characteristic of the wind-power variations could be appropriately represented.