Urban rail transit DC armored cable insulation on-line monitoring system and method

• Main Authors: SANG ZIJIE, CHEN ZHIWEI, ZHAO YANGYANG, LYU WENBO, XIA ZHENGWEI, WU WEIKANG, ZHOU YUNFENG, LI YALI, YAN ZEYUAN, WANG CHUNWEI, SHEN JU, LIU AIHUA, JIA CHUNING
• Format: Patent
• Language: Chinese; English
• Published: 20.08.2021
• Subjects: MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; TESTING

The invention provides an urban rail transit direct current armored cable insulation on-line monitoring system, which comprises a measuring module and a monitoring device, and is characterized in that the input end of the measuring module is connected with a conductor and an armor of a direct current armored cable, and the measuring module is used for measuring voltage values of a conductor pair cathode and an armor pair cathode. The output end of the measuring module is connected with the monitoring device, and the output end of the monitoring device is connected with a circuit breaker tripping loop of the direct-current armored cable loop. The on-line monitoring method comprises the following steps: respectively measuring the voltage values of the conductor pair cathode and the armored pair cathode of the DC armored cable, calculating the ratio of the voltage value of the armored pair cathode to the voltage value of the conductor pair cathode, and if the ratio changes, determining that the main insulation o