1. Electric Power Science Research Institute of Guangxi Power Grid Co., Ltd Guangxi Zhuang Autonomous Region,China
2. Electric Power Science Research Institute of Guangxi Power Grid Co., Ltd 2. Guangxi Power Transmission and Transformation Construction Co., Ltd Guangxi Zhuang Autonomous Region,China
3. Nanning Power Supply Bureau of Guangxi Power Grid Co., Ltd Guangxi Zhuang Autonomous Region,China