Xiao He / Shannxi Electric Power Research Institute
Baofeng Zuo / Shannxi Electric Power Research Institute
Anyang He / Xi'an Jiaotong University
Zongbo Li / Xi'an Jiaotong University
Hao Qi / Xi'an Jiaotong University
Zaibin Jiao / Xi'an Jiaotong University
The main protections of power transformer recently used are differential protections which identify inrush current based on second harmonic or dead angle. However, these protections are