1. School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, Stockholm, Sweden
2. Institute for Automation of Complex Power Systems, E.ON Energy Research Center, RWTH Aachen University, Aachen, Germany
3. Department of Model Development and System Studies, Svenska Kraftnät, Sundbyberg, Sweden
4. Department of Research and Development, Réseau de Transport d’Électricité, Paris, France