1. Dongguan Power Supply Bureau of Guangdong Power Grid Corporation, Dongguan, China
2. College of Electrical and Information Engineering, Hunan University, Changsha, China
3. Power China Zhongnan Engineering Corporation Ltd., Changsha, China
4. Xuzhou Power Supply Company of State Grid Jiangsu Electric Power Company Ltd., Xuzhou, China
5. CRRC Zhuzhou Electric Locomotive Institute Company Ltd., Zhuzhou, China