1. School of Electrical Engineering and Automation, Wuhan UniversityWuhanPeople's Republic of China
2. Shenzhen Institute of Wuhan UniversityShenzhenPeople's Republic of China
3. China Energy Engineering Group Jiangsu Power Design Institute CompanyNanjingPeople's Republic of China
4. Department of Electrical EngineeringKyoto UniversityKyotoJapan
5. Department of Electrical and Electronic EngineeringSaga UniversitySagaJapan