Online power cable water-intake monitoring device

Abstract

The invention discloses an online power cable water-intake monitoring device. The monitoring device is composed of a sensing optical fibre and a water absorbing expansion material; the inner layer isthe sensing optical fibre, and used as a sensor and used as a monitoring signal transmission line at the same time; the outer layer is the water absorbing expansion material; after absorbing water, the water absorbing expansion material generates expansion extrusion force on the inner layer, so that the sensing optical fibre in the inner layer is deformed; the signal propagation characteristics inthe optical fibre are changed; signals outgoing from the sensing optical fibre are analyzed; therefore, real-time monitoring on cable water intake can be realized; the monitoring device is flexible in whole material and good in plasticity, and is suitable for all kinds of power cables having related demands; the device is put and installed in the inner structure of the cable in a spirally windingmanner or in an axial straight manner along the cable; therefore, the monitoring device is tightly close to the inner structure of the cable; and the monitoring sensitivity is ensured.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of cable lines, in particular to an on-line monitoring device for power cable water inlet. Background technique [0002] Power cable is an important equipment for transmission and distribution of electric energy in the power system, and its safe operation is of great significance to ensure the reliability of power supply. With the widespread application of cables in urban power transmission and distribution networks, the number of faults has also been increasing year by year in recent years. The quality of the manufacturer's products and the workmanship of the on-site construction and installation personnel are the main reasons for cable failures. The water ingress caused by these two is an important factor affecting the safe and reliable operation of cables. Water entering the cable will accelerate the thermal aging of the insulation, and at the same time make the metal shielding and ...

AI Technical Summary

Problems solved by technology

The device can monitor the water inflow inside the running cable in real time. It is suitable for all kinds of power cables and solves the problem that the water inflow of the running cable cannot be monitored in real time at this stage. Using this device can effectively improve the intelligent operation and maintenance of the cable line Level

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