1Department of Electrical Engineering;
Xi'an Jiaotong University;
Xi’an;
China 2Department of Technology Center;
XJ Group Limited Company;
Xuchang;
China;
Department of Electrical Engineering;
Xi'an Jiaotong University;
Xi’an;
China;
UHV; Fast; Extraction; Method; Matrix; Pencil; Transient; Process; Fault; Location;