1. State Key Laboratory of Power Transmission Equipment … System Security and New Technology, Chongqing UniversityShapingba DistrictChongqing400044People's Republic of China
2. Nanning Power Supply Bureau, Guangxi Power Grid CompanyGuangxi530031Guangxi ProvincePeople's Republic of China
3. Foshan Power Supply Bureau, Guangdong Power Grid CompanyFoshan528000Guangdong ProvincePeople's Republic of China
4. State Key Laboratory of Advanced Power Transmission TechnologyBeijing102209People's Republic of China