1. Laiwu Power Supply Company of State Grid Shandong Electric Power Company,Laiwu,China,271100
2. Tianjin Design Institute of China Petroleum Engineering Project Management Company,Tianjin,China,300457
3. State Grid Tianjin Electric Power Company,High Voltage Branch,Tianjin,China,300143
4. Tianjin University,School of Electrical and Information Engineering,Tianjin,China,300072