1[2]Working Group G-7 of the Relay Standards Committee of the Power Systems Relaying Committee. IEEE Standard Inverse Time Characteristic Equations for Overcurrent Relays. IEEE Trans on Power Delivery, 1999, 14(3): 868～872
2[3]Benmouyal G. Some Aspects of the Digital Implementation of Protection Time Functions. IEEE Trans on Power Delivery,1990, 5(4): 1705～1713
3[4]Henville C F. Combined Use of Definite and Inverse Time Overcurrent Elements Assists in Transmission Line Ground Relay Coordination. IEEE Trans on Power Delivery, 1993,8(3): 925～932
4U.S. - Canada Power System Outage Task Force Interim Report: Causes of the August 14th Blackout in the United States and Canada.
5August 14,2003 Outage Sequence of Events, U.S./Canada Power Out-age Task Force 2003.9,2003.
