Method and system for positioning local defect of cable line

• Main Authors: OUYANG BENHONG, XIA RONG, LI WENJIE, WANG YULI, ZHAO PENG, ZHANG ZHENPENG, DENG XIANBO, YI HUAJIE, LIU SONGHUA, SHI XIAOCHUAN, ZHOU HAO
• Format: Patent
• Language: Chinese; English
• Published: 02.07.2019
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a method for positioning a local defect of a cable line. The method comprises the steps that a detection signal is input into the first end of the inspected cable, so as to acquire the impedance spectrum of the inspected cable; an insulated standard cable is selected; the detection signal is input into the first end of the standard cable to acquire the impedance spectrum ofthe standard cable; an integration factor is selected through integral transformation; a first function including the impedance spectrum of the inspected cable and the position of the inspected cableand a second function including the impedance spectrum of the standard cable and the position of the standard cable are established respectively; a local defect indicator function of the inspected cable is established according to the first function and the second function; and the location of the local defect of the inspected cable is determined through the oscillation interval of the local defect indicator function curv