US 12,292,466 B2
Method and system for detecting location of fault in a cable
Simi Valsan, Ernakulam (IN); Apala Ray, Bangalore (IN); Ketan Kulkarni, Belagavi (IN); and Arinjai Gupta, Bangalore (IN)
Assigned to ABB Schweiz AG, Baden (CH)
Filed by ABB Schweiz AG, Baden (CH)
Filed on Aug. 16, 2023, as Appl. No. 18/450,592.
Application 18/450,592 is a continuation of application No. PCT/IB2021/051295, filed on Feb. 16, 2021.
Prior Publication US 2023/0400499 A1, Dec. 14, 2023
Int. Cl. G01R 31/08 (2020.01); H02H 3/28 (2006.01)
CPC G01R 31/086 (2013.01) [H02H 3/28 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A method for detecting location of fault in a cable of an electrical power system, wherein the cable comprises a plurality of sections, wherein one end of each of the plurality of sections is connected with a first protection relay and other end of each of the plurality of sections is connected with a second protection relay, and wherein each of the plurality of sections comprises one or more segments, the method comprising:
receiving, by a fault locating system, disturbance data from the first protection relay and the second protection relay when at least one of the first protection relay and the second protection relay detects a fault in the cable;
extracting, by the fault locating system, voltage and current data for each segment in a section of the cable using the disturbance data, cable parameters and length of each segment;
determining, by the fault locating system, a fitness value for each segment in the section of the cable using the voltage and current data extracted for each segment in the section of the cable, wherein the fitness value is based on a square of difference between the extracted voltage and current data of each segment associated with the first protection relay and the extracted voltage and current data of each segment associated with the second protection relay;
identifying, by the fault locating system, a segment with a lowest fitness value from the fitness value determined for each segment in the section of the cable by comparing the fitness value of each segment in the section with the fitness value of subsequent segments in the section; and
detecting, by the fault locating system, the segment with the lowest fitness value as location of the fault in the cable.