1. Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Rd., Minhang District, Shanghai 200240, China, (Corresponding author), e-mail: chen_jian@sjtu.edu.cn, https://orcid.org/0000-0002-0230-824X
2. Anhui Province Key Laboratory of Aircraft Lightning Protection, 105 Kexueyuan Rd., Shushan District, Anhui 230031, China
3. Key Laboratory of Control of Power Transmission and Conversion, Ministry of Education, Shanghai Jiao Tong University, 800 Dongchuan Rd., Minhang District, Shanghai 200240, China