1. Electric Power Company, Economic Research Institute of State Grid,Shijiazhuang,Hebei,China
2. State Grid Hebei Electric Power Co., LTD,Shijiazhuang,Hebei,China
3. Longyuan (Beijing) Wind Power Engineering & Consulting Co., Ltd,Beijing,China
4. University of Geosciences (Wuhan),the school of Automation, China,Wuhan,China
5. Huazhong University of Science and Technology,the School of Electrical and Electronic Engineering,Wuhan,China