1. Power Systems and Markets Research group, University of Mons, 31, Boulevard Dolez, Mons, Belgium
2. Department of Wind and Energy Systems, Technical University of Denmark, 325, Elektrovej, Kgs. Lyngby, Denmark
3. TME Branch, Energy Institute, University of Leuven (KU Leuven), 13, Oude Markt, Leuven, Belgium