1. Changchun Institute of Technology,School of Energy and Power,Changchun,China
2. State Grid Jilin Electric Power Co., Ltd,Changchun Power Supply Company,Changchun City,China
3. State Grid Jilin Electric Power Co., Ltd,Siping Power Supply Company,Siping City,China
4. Changchun Institute of Technology,NLJERCSDGMCSOT,Changchun,China