1. Research Group on Energy, Economy and System Dynamics, Escuela de Ingenierías Industriales, University of Valladolid, Paseo del Cauce s/n, 47011 Valladolid, Spain
2. Department of Systems Engineering and Automatic Control, Escuela de Ingenierías Industriales, University of Valladolid, Paseo del Cauce s/n, 47011 Valladolid, Spain
3. Department of Applied Physics, Escuela de Ingenierías Industriales (Sede Mergelina. 511), University of Valladolid, C/dr. Mergelina s/n, 47011, Spain
4. Department of Electric Engineering, Escuela de Ingenierías Industriales, Paseo del Cauce s/n, University of Valladolid, 47011 Valladolid, Spain