1. State Key Laboratory of Power Grid Environmental Protection, School of Electrical Engineering and Automation, Wuhan University, Wuhan, China
2. Hubei Provincial Key Laboratory for Operation and Control of Cascaded Hydropower Station, China Three Gorges University, Yichang, China
3. School of Intelligent Systems Engineering, Sun Yat-Sen University, Guangzhou, China
4. Department of Electrical and Electronic Engineering, Saga University, Saga, Japan