1. LPP, CNRS, Ecole Polytechnique, Sorbonne Université, Université Paris-Sud, Observatoire de Paris, Université Paris-Saclay, Palaiseau F-91128, France
2. IMT Lille Douai, SAGE, Université de Lille, F-59000 Lille, France
3. State Key Laboratory of Electrical Insulation and Power Equipment, School of Electrical Engieneering, Xi’an Jiaotong University, Xi’an 710049, People’s Republic of China