中文摘要：

REN Ming was born in Shaanxi Province, China in 1987. He received the B. Se. degree in electrical engineering from Xi＇an Jiaotong University, Xi＇an, China in 2009, where he is currently pursuing the Ph. D. degree under the guidance of Dr. Aici Qiu. His major is high voltage engineering and his research work is fault diagnosis and state maintenance of power system and PD detection in GIS under impulse voltage. His cell phone number is ＋ 8615902901435 and email address is ren. ming @ stu. xjtu. edu. cn or renming100@ gmail.com DONG Ming was born in Shaanxi Province, China in 1977. He received the dortor＇ s degree in 2005 and now he was a lectorate in Xi＇ an Jiaotong University. His research work is fault diagnosis and state maintenance of power system. His email address is dong. ruing @ mail. xjtu. edu. cn