Unsymmetrical Faults

Please sign in to view the rest of this entry.

Unsymmetrical Faults
1010603 Unsymmetrical Faults
Introduction An unsymmetrical or asymmetrical fault is defined as a fault that affects one or two phases of a three-phase system in contrast with the previously studied balanced or symmetrical faults which equally affect each of the three phases. Unsymmetrical faults constitute more than 95 percent of all faults occurring on a transmission line. Although this type of fault involves lower fault current magnitude than symmetrical faults, its study is particularly important with regard to system stability considerations, relay setting, and single-phase switching. As well, current flow into the ground from unsymmetrical faults can affect n…
Masoud Farzaneh, Ph.D.; Shahab Farokhi, Ph.D.; William A. Chisholm, Ph.D.: Electrical Design of Overhead Power Transmission Lines. Unsymmetrical Faults, Chapter (McGraw-Hill Professional, 2013), AccessEngineering Export