introduction -The demands of modern large scale interconnected power system for the continuous reliable capability processing global real-time information are increasing with each passing day. Under large-scale interconnected condition,power system wide-area measurement and control is the key to ensure the security of power network -China concerns this issue because super large scale power system is formed. 电力拿镜广城洲量写控制四川省童点实验蜜 家电电力系统广域测量与控制四川省重点实验室 introduction The demands of modern large scale interconnected power system for the continuous reliable capability processing global real-time information are increasing with each passing day. Under large-scale interconnected condition, power system wide-area measurement and control is the key to ensure the security of power network China concerns this issue because super large scale power system is formed