3Kang Y C, Ok S H, Kang S H. A CT saturation detection algorithm[J]. IEEE Trans on Power Delivery, 2004, 19(1): 78-85.
4Linders J R. Relay performance considerations with low-ratio CT's and high-fault currents[J]. IEEE Trans on Industry Applications,1995, 31(2): 392-404.
5Kang Y C, Park J K, KangSHetal. An algorithm for compensating secondary currents of current transformers[J]. IEEE Trans on Power Delivery, 1997, 12(1): 116-124.