公开(公告)号：US20190391191A1

公开(公告)日：2019-12-26

申请号：US16315665

申请日：2016-07-08

申请人： ABB Schweiz AG

发明人： Naidu OBBALAREDDI DEMUDU ,  Amit PUROHIT ,  Sachin SRIVASTAVA ,  Jianping WANG

IPC分类号： G01R27/16 ,  G01R31/08 ,  H02H7/26

摘要： A method and system is provided for locating a fault in a mixed power transmission line. The method is implemented by an Intelligent Electronic Device (IED) of the mixed line. The IED detects a travelling wave from one or more signals received from one or more measurement equipment. Thereafter, the IED identifies a line section with the fault, and generates two or more estimates for the location of the fault based on a time difference between arrival of two peaks of the travelling wave, a velocity of propagation of the travelling wave in the line section identified with the fault, and a length of one or more line sections. The IED determines the location of the fault based on a comparison of each estimate with a threshold, wherein the threshold is estimated based on the one or more signals, equivalent source impedance of each source and total line impedance.