Method of detecting fault extinction during a three-phase autoreclosing cycle in an AC transmission line

摘要

A new method for three-phase reclosing of transmission lines is disclosed. According this method, after the type of fault is identified and the faulted line is opened for all three phases from both ends, fault extinction is recognized by comparison of amplitudes and angles of voltages induced at opened phases with predetermined settings. The transmission line is reclosed after the fault is found to be extinguished.