1. S.H. Horowitz, A.G. Phadke, Power system relaying, third ed., 2008.
2. Z. Gerhard, Numerical differential protection: principles and applications, second ed., 2012.
3. Low second-harmonic content in transformer inrush currents – analysis and practical solutions for protection security;Hodder,2014
4. A new inrush detection algorithm for transformer differential protection;Xia,2014
5. Relay Protection Training Materials of State Grid Corporation of China,2009