Research on online detection and location of multi-conductor cables' faults

Abstract

Due to the existence of signal junctions in multi-conductor cables, on-line detection using spread spectrum time domain reflectometry(SSTDR) method is prone to a misjudgment, and the amplitude of reflected signal is too small to be detected. In this paper, trappers with proper installation are used to realize directional transmission of detection signal, which can eliminate the effect of signal converging. And a multi-channel time-sharing cycle detection method is proposed to simplify the detector. Simulations and experiments indicate that multi-conductor cables' fault can be detected successfully.