1. School of Power and Mechanical Engineering, Wuhan University, Wuhan 430072, China
2. Key Laboratory of Hydraulic Machinery Transients, Ministry of Education, Wuhan University, Wuhan 430072, China
3. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China
4. Technology Center of State Grid Xinyuan Co., Ltd., Beijing 100000, China
5. Department of Electrical and Computer Engineering, University of Calgary, Calgary, AB T2N 1N4, Canada