H - Electricity – 02 – H
Patent
H - Electricity
02
H
348/20, 324/29
H02H 3/16 (2006.01) H02H 3/02 (2006.01) H02H 7/26 (2006.01)
Patent
CA 1183935
ABSTRACT OF THE DISCLOSURE Protective relay apparatus and methods for detecting direction to a fault from a measuring point on an A.C. electrical power transmission line using current and voltage deviation signals which may include traveling wave transients, and for providing both directional and distance information from the same signals after traveling wave transients have been removed. Fault generated cur- rent and voltage deviations from the steady-state, pre- fault magnitudes are used to generate trajectories in one embodiment by differentiating the current deviation and using it as one coordinate, and by using the voltage deviation as the other coordinate. A forward fault pro- duces a straight line trajectory which crosses the origin between the second and fourth quadrants, and the reverse direction fault produces a straight line trajectory which crosses the origin between the first and third quadrants. Providing threshold boundaries in the quadrants and de- tecting a crossing thereof provides fault direction ac- cording to the quadrant in which the crossing occurred.
409015
Oldham And Company
Westinghouse Canada Inc.
LandOfFree
Protective relay apparatus and methods for protecting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Protective relay apparatus and methods for protecting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Protective relay apparatus and methods for protecting... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1198768