Yang Xu China, School of Electrical and Electronic Engineering, Harbin,Key Laboratory of Dielectric Engineering, Harbin University of Science and Technology
Ji Yaozheng School of Electrical Engineering, Southwest Jiaotong University;Lu Zude School of Electrical Engineering Southwest Jiaotong University ChengDu,China
Wang Wei State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing P.R.China,102206