1. Hubei Provincial Engineering Research Center of Intelligent Energy Technology China Three Gorges University Yichang 443002 China
2. Electric Power Research Institute Yunnan Power Grid Co., Ltd. Kunming Yunnan 650217 China
3. Fuzhou Power Supply Company State Grid Fujian Electric Power Co., Ltd. Fuzhou Fujian 350009 China
4. Yingtan Power Supply Branch State Grid Jiangxi Electric Power Co., Ltd. Yingtan Jiangxi Province 335000 China
5. Electric Power Research Institute State Grid Hunan Electric Power Co., Ltd. Changsha Hunan Province 410007 China
6. Department of Mechanical Systems Engineering Tokyo University of Agriculture and Technology Tokyo 184‐8588 Japan