【Author】
Kong Weibin1 ,H an H ongyue2 ,H e Xuefeng2 ,H e Shan3 1.Guangdong Electric Power Design Institute,Guangzhou 5 10 6 0 0 ,China 2 .Nanjing Autom ation Research Institute,Nanjing2 10 0 0 3,China 3.Guangdong Foshan Electric Power Design Institute,Fosh