1. School of Electrical EngineeringShanghai University of Electric PowerShanghaiPeople's Republic of China
2. State Grid Shanghai Jinshan Electric Power Supply CompanyShanghaiPeople's Republic of China
3. Key Laboratory of Smart Grid (Tianjin University)Ministry of EducationTianjinPeople's Republic of China
4. Department of Electrical EngineeringSouthern Methodist UniversityDallasUSA