1. State Grid Corporation Ltd. of China,Deptment of UHV Construction,Beijing,China
2. China Electric Power Research Institute Ltd,Deptment of Relay Protection,Beijing,China
3. DC Technical Center of State Grid Corporation of China,Deptment of technology,Beijing,China
4. State Grid Jiangsu Electric Power Co. Ltd,Taizhou UHV Converter Station,Jiangsu,China