1. School of Electrical Engineering, Xi’an University of Technology, Xi’an, China
2. School of Electrical Engineering, Xi’an Jiaotong University, Xi’an, China
3. Faculty of Electrical Engineering and Computer Sciences, Technische Universität Berlin, Berlin, Germany
4. Power Distribution Network Research Center, Jiangxi Electric Power Research Institute of State Grid, Nanchang, China
5. Power Distribution Network Research Center, Henan Electric Power Research Institute of State Grid, Zhengzhou, China