1. Associate Professor, College of Electrical and Information Engineering, Zhengzhou Univ. of Light Industry, Zhengzhou 450002, PR China (corresponding author).
2. Graduate Student, College of Electrical and Information Engineering, Zhengzhou Univ. of Light Industry, Zhengzhou 450002, PR China.
3. Professor, Dept. of Electrical Power Engineering and Mechatronics, Tallinn Univ. of Technology, Tallinn 19086, Estonia. ORCID: