1. Research Group of Process Control and Automation, Department of Chemical and Metallurgical Engineering, School of Chemical Engineering, Aalto University, Espoo FI-00076, Finland
2. Department of Chemical Engineering, University of Salamanca, Plz. Caídos 1-5, Salamanca 37008, Spain
3. Hitachi ABB Power Grids Research, Kallstadter Straße 1, Mannheim 68309, Germany