Online power cable water-intake monitoring device

A technology for monitoring devices and power cables, applied in measuring devices, using optical devices to transmit sensing components, saving water, etc., can solve problems such as real-time monitoring of cables that cannot be operated, and achieve the goals of avoiding interference from environmental factors, good plasticity, and improving efficiency Effect

Pending Publication Date: 2019-08-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Online power cable water-intake monitoring device
  • Online power cable water-intake monitoring device
  • Online power cable water-intake monitoring device

Examples

Experimental program
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Effect test

Embodiment

[0022] Such as figure 1 As shown, this embodiment discloses an online monitoring device for power cable water inlet. The monitoring device is composed of a sensing optical fiber 1 and a water-absorbing swelling material 2. The inner layer of the monitoring device is the sensing optical fiber 1, which serves as a sensor and simultaneously as a monitoring Signal transmission line; the outer layer is a water-absorbing swelling material 2, and the two-layer structure is closely bonded to form a water inflow monitoring device. When water enters the cable, the water-absorbing swellable material 2 absorbs moisture and generates expansion and extrusion force on the inner layer sensing fiber 1, changing the propagation characteristics of the signal in the sensing fiber 1. By analyzing the signal leading out of the sensing fiber 1, that is It can realize real-time monitoring of cable water ingress.

[0023] The sensing optical fiber 1 is an optical fiber with an optical fiber sensing u...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/26
CPCG01D5/268Y02A20/00
Inventor 刘刚许志锋
Owner SOUTH CHINA UNIV OF TECH
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