1. School of Electrical Engineering and Automation Wuhan University Wuhan China
2. High Voltage Research Institute China Electric Power Research Institute Wuhan China
3. Maintenance Branch Suzhou branch State Grid Jiangsu Electric Power Company Suzhou China
4. Jingmen Power Supply Company State Grid Hubei Electric Power Company Jingmen China
5. Jiangxi Electric Power Research Institute State Grid Jiangxi Electric Power Company Nanchang China