1. Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark
2. Department of Energy, Aalborg University, Aalborg, Denmark
3. Elektro, Danmarks Tekniske Universitet, Kgs. Lyngby, Denmark
4. DTU Elektro, Technical University of Denmark, Kgs. Lyngby, Denmark
5. Department of Energy Technology, Aalborg University, Aalborg, Denmark