1. College of Electrical and Information EngineeringHunan UniversityChangsha410082People's Republic of China
2. College of Electronic and Information EngineeringYili Normal UniversityYili835000People's Republic of China
3. School of Electronics and Information EngineeringHarbin Institute of TechnologyHeilongjiang150080People's Republic of China
4. Equipment Condition Assessment CenterHunan Electric Power Research InstituteChangsha410000People's Republic of China