1. Department of Electrical Engineering, Universidad de Talca, Curicó, Chile
2. Department of Electrical Engineering, University of Concepción, Concepción, Chile
3. Engineering Science Institute, Universidad de O’Higgins, Rancagua, Chile
4. Department of Electrical Engineering, Universidad Técnica Federico Santa María, Valparaíso, Chile
5. Department of Electrical Engineering, University of Jaén, Jaén, Spain
6. Department of Environment and Energy, Universidad Católica de la Santísima Concepción, Concepción, Chile