1. National Rail Transit Electrification and Automation Engineering Technique Research Center, Chengdu, China
2. School of Electrical Engineering, Southwest Jiaotong University, Chengdu, China
3. State grid Jibei electric co, LTD, Zhangjiakou power supply company, Zhangjiakou, Hebei, China
4. State Grid Chongqing Bishan Power Supply Company, Bishan, Chongqing, China
5. Department of Electrical Engineering, Southwest Jiaotong University, Chengdu, China
6. Electrical Engineering from Northwestern Polytechnical University (NPU), Xi’an, Shanxi, China