4Serizawa Y,Imamura H, Sugaya N of wide--area current differential Experimental examination backup protection employing broadband communication and time transfer systems[C]. IEEE Power Engineering Society Summer Meeting, Edmonton, Alberta, Canada, 1999.
5Tan J C, Crossley PA, Mclaren P G, et al. Application of a wide area backup protection expert system to prevent cascading outages[j]. IEEE Trans on Power Delivery, 2002, 17(2): 375- 580.
