1. National Renewable Energy LaboratoryGoldenCOUSA
2. Department of Electrical and Computer EngineeringUniversity of DenverDenverCOUSA
3. Electric Power Research InstituteKnoxvilleTNUSA
4. General Electric Energy ConsultingSchenectadyNYUSA
5. Department of Electrical and Computer EngineeringKansas State UniversityManhattanNYUSA