1. Hunan University,College of Electrical and Information Engineering,Changsha,China
2. Wenzhou University,National-Local Joint Engineering Laboratory of Digitalize Electrical Design Technology,Wenzhou,China
3. Hunan Institute of Engineering,School of Electrical and Information Engineering,Xiangtan,China
4. UPS Institute Guangdong Zhicheng Champion Group Co., Ltd.,Dongguan,Guangdong