Substation secondary cable fault detection method

• Main Authors: YU YAOZHANG, JING YUZHI, CHU JIANGUANG, LIU JUAN GEN
• Format: Patent
• Language: Chinese; English
• Published: 06.09.2022
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention discloses a substation secondary cable fault detection method, and relates to the technical field of multi-core cable detection. The invention aims to solve the problems that the detection dead zone is too large and the detection process is repeated and tedious when the multi-core secondary cable is detected by adopting the traditional single-end traveling wave. According to the method, transmitting pulses are injected into each single-core cable from one end of a detected secondary cable, the transmitting pulses on each single-core cable are gradually adjusted to different pulse widths, pulse intervals and pulse amplitudes, and then return pulses on each single-core cable in the secondary cable are detected in real time; when the polarity of the return pulse is the same as that of the transmitting pulse and the amplitude of the return pulse on all the single-core cables is smaller than that of the transmitting pulse, the detected secondary cable is normal; when the amplitude of the return pulse