ONLINE REPAIRING METHOD FOR INSULATING PROPERTY OF CROSS-LINKED POLYETHYLENE POWER CABLE WHEN IN OPERATION

• Main Authors: Li, Yuan, Zhang, Tao, Meng, Pengfei, Li, Zerui, Gong, Wei, Kong, Jiamin, Zhou, Kai, Ran, Li, Zhu, Guangya
• Format: Patent
• Language: English
• Published: 24.12.2020
• Subjects: CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION; INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINEDOPTICAL AND ELECTRIC CABLES OR LINES

The disclosure provides an online repairing method for insulating property of a cross-linked polyethylene power cable when in operation, aiming at the defects of the existing repair technology. The online repairing method is that repair fluid is filled into a cable in the pressurized operating process of the cable, which not only provides an electric field in the process of repairing the cable to open a water tree channel so that repair effect is better but also shortens the power-off maintenance time of the cable. Meanwhile, because the cable is in work and repair states, the operating reliability of the cable is improved. These two repair modes have the characteristics that the electric field action is applied to the cable so that the repair effect of the cable is improved, the power-off maintenance time of the cable is obviously shortened, the medium and long term repair effects of the cable and the repair effect of a long-distance small-section cable are good, and have the advantages of advanced technology, safety and stability, low cost and wide application range. Support bracket Repair fluid tank Fluid level gauge Conduit Switch 0 Copper nose Pressure balance tube Adapter GroundS Cable Repair fluid injection hole Copper nose Sealband Cable core Adapter