1. School of Information and Control Engineering, China University of Mining and Technology,Xuzhou,China,221116
2. North China Electric Power University,Laboratory of Alternate Electrical Power System with Renewable Energy Sources,Beijing,China,102206
3. School of Information Science and Technology, Qingdao University of Science and Technology,Qingdao,China,266061
4. Tsinghua University,Department of Automation,Beijing,China,100084
5. South Africa Weather Service,Pertoria,South Africa,0001