Method for embedding optical fiber sensor in intelligent grid power cable

Abstract

The invention relates to a method and a device for embedding an optical fiber sensor in an intelligent grid power cable. The optical fiber sensor which is formed by distributed optical fiber sensor probes by virtue of auxiliary fixtures, optical fibers, waterproof ointment, a metal casing, an armor layer and an outer sheath layer is embedded into power cable conductors and an outer sheath during the production of the power cable according to the quantity of the intelligent grid power cable conductors and the requirements of monitoring positions of the outer sheath to form the intelligent gridpower cable. The optical fiber sensor probes which are embedded into the intelligent grid power cable conductors and the outer sheath can monitor the operating temperature of the conductors and the outer sheath in real time, can position cable breaking points in real time, can reduce the occurrence rate of accidents, can improve cable current-carrying capacity and can provide a guarantee for the safe operation of the power cable. The device has the advantages that the volume is small, the structure is simple, the device is intrinsically insulated and an external power supply is not required to be connected.

Description

Technical field: [0001] The invention belongs to the application field of optical fiber sensing technology, and relates to a method and a device for embedding an optical fiber sensor in a smart grid power cable. Background technique: [0002] The electric power industry is a basic industry for the development of the national economy and plays an important role in economic construction. With the rapid development of the economy, the demand for electricity in various countries is increasing day by day, resulting in an increase in the rated voltage and rated current level of the power system year by year. Due to the decline in the application cost of power cables, and the power cables themselves have the characteristics of high power supply reliability, no influence from the ground and space buildings, no damage from harsh weather, safety, concealment and durability, etc., power cable power supply is becoming a national transmission and distribution The mainstream mode of powe...

AI Technical Summary

Problems solved by technology

[0007] (4) Distributed optical fiber temperature sensor: The cable fault location is realized by detecting the temperature change near the fault point. Because the measured temperature is the average temperature within a range, the accuracy is not high, and it cannot accurately reflect the temperature of each point and the conductive wire. core temperature

As the cable length and cross-sectional size become larger and larger, the corresponding handover test brings greater difficulties to the test equipment due to the increase in the voltage level and capacitance of the object.

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