4Agudo M E, Young W, Kasperek B et al. End-to-end relay tests use secondary injection[J]. IEEE Computer Applications in Power, 2000,13(1): 32-37.
5Mir M, Al-saleh M A. A digital simulator for determining the performance limits of computer relays[J]. IEEE Trans on Power Delivery, 2002, 17(1): 60-67.
6Kezunovic M. Digital simulator performance requirements for relay tesfng[J]. IEEE Trans on Power Delivery, 1998, 13(1): 78-84.
