1. Graduate Program in Electrical Engineering, Universidade Federal de Minas Gerais, Belo Horizonte, MG, Brazil
2. Department of Electrical Engineering, Universidade Federal de Viçosa, Viçosa, MG, Brazil
3. Digital Grid, Viçosa, MG, Brazil
4. Department of Electrical Engineering, CEFET, Belo Horizonte, MG, Brazil