1. Tianjin University,Tianjin,China
2. Techno-Economic Center of China Electricity Council,Beijing,China
3. China Electric Power Planning & Engineering Institute,Beijing,China
4. AVIC XI AN Flight automatic control research Institute,Xian,China
5. State Grid Tianjin High Voltage Company,Tianjin,China
6. State Grid Tianjin Jinghai Electric Power Supply Company,Tianjin,China