公开(公告)号：CA2932899C

公开(公告)日：2019-06-18

申请号：CA2932899

申请日：2014-12-07

Applicant: ABB INC

Inventor： KANG NING ,  MOUSAVI MIRRASOUL

IPC: H02H3/40 ,  G01R31/08 ,  H02H7/28

Abstract: Systems and methods for identifying faulted segment(s) in a multiphase power network may include receiving a current measurement that was measured during a fault, obtaining a set of equivalent sequence impedances for the segments, building a set of sequence bus impedance matrices, selecting a segment, calculating coefficients for the segment based on the set of equivalent sequence impedances for the segment and the sequence bus impedance matrices, calculating an estimated per unit fault distance for the segment based at least partially on the current measurement and the coefficients, identifying the segment as a potentially faulted segment if the estimated fault distance for the segment is between about zero and about one, and repeating for each of the segments the calculating coefficients, calculating an estimated per unit fault distance, and identifying as a potentially faulted segment if the estimated fault distance for the segment is between about zero and about one.

公开(公告)号：CA2932899A1

公开(公告)日：2015-06-11

申请号：CA2932899

申请日：2014-12-07

Applicant: ABB INC

Inventor： KANG NING ,  MOUSAVI MIRRASOUL

IPC: H02H3/40 ,  G01R31/08 ,  H02H7/28

Abstract: Systems and methods for identifying faulted segment(s) in a multiphase power network may include receiving a current measurement that was measured during a fault, obtaining a set of equivalent sequence impedances for the segments, building a set of sequence bus impedance matrices, selecting a segment, calculating coefficients for the segment based on the set of equivalent sequence impedances for the segment and the sequence bus impedance matrices, calculating an estimated per unit fault distance for the segment based at least partially on the current measurement and the coefficients, identifying the segment as a potentially faulted segment if the estimated fault distance for the segment is between about zero and about one, and repeating for each of the segments the calculating coefficients, calculating an estimated per unit fault distance, and identifying as a potentially faulted segment if the estimated fault distance for the segment is between about zero and about one.