1. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
2. State Grid Xuji Group Corporation, Xuchang 461000, China
3. U.S.-Pakistan Center for Advanced Studies in Energy, National University of Sciences and Technology, Islamabad 44000, Pakistan
4. State Grid Henan Electric Power Corporation Research Institute, Zhengzhou 450015, China