1. University of Campinas (Unicamp),FEEC/LESF,Campinas,Brazil
2. University of Bahia (UFBA),DEEC/PPGEE,Salvador,Brazil
3. University of Campinas (Unicamp),FEEC/DSE,Campinas,Brazil
4. INMETRO,Electrical Energy Metrology Laboratory,Xerém,Rio de Janeiro