I. Introduction
Wind power is one of the fastest growing means of power generation. In a time of paradigm change in energy policy and intensified competition of renewable energy sources, wind power offers several environmental benefits. However, due to its intermittent nature, the integration of wind power poses challenges on power system operation [1]–[3]. In order to minimize power imbalance, appropriate means of forecasting power production are essential. Since forecasting is inherently erroneous, the target is to minimize the forecast error. A vast number of forecast models have been developed in research. The state-of-the-art in wind power forecasting is summarized in [1] and [4]. In the review of [5], five basic types of forecasting models are identified.