1. College of Electrical Engineering and Automation, Fuzhou University, Fuzhou, China
2. College of Electrical Engineering and Automation and Fujian Key Laboratory of New Energy Generation and Power Conversion, Fuzhou University, Fuzhou, China
3. Department of Electrical Engineering, Yuan Ze University, Taoyuan, Taiwan
4. College of Electronic Information Science, Fujian Jiangxia University, Fuzhou, China