1. School of Nuclear Engineering, Purdue University, West Lafayette, Indiana 47906, USA
2. School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA
3. Department of Agricultural and Biological Engineering, Purdue University, West Lafayette, Indiana 47907, USA
4. State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an 710049, China
5. Department of Computational Mathematics, Science and Engineering, Michigan State University, East Lansing, Michigan 48824, USA
6. Department of Electrical and Computer Engineering, Michigan State University, East Lansing, Michigan 48824, USA