Uniform-electric-field intelligent temperature-sensing power supply cable

Abstract

The invention discloses a uniform-electric-field intelligent temperature-sensing power supply cable which comprises a conductor cable core and an insulating layer, the conductor cable core is composed of a central conductor and tile-shaped conductors, conductive insertion strips are embedded in corner arc gaps of the adjacent tile-shaped conductors, and the ratio of the thickness of the insulating layer to rated voltage is 0.4 mm / kv to 0.45 mm / kv; at least one temperature measuring optical fiber is inserted in a steel wire armoring layer, the temperature measuring optical fiber is located in the holding groove of the holding steel wires on the two adjacent sides, and the adjacent armoring steel wires are sequentially and movably connected through corresponding steel wire tenons and corresponding steel wire mortises respectively; metal outer tubes sleeve the periphery of a heat conduction layer of the temperature measuring optical fiber at intervals, and heat conduction filling paste between the heat conduction layer and the metal outer tubes comprises the following components: a gelatinizing agent, an oil separation inhibitor, an antioxidant, a water absorbent, a defoaming agent and the balance of heat conduction oil. The intelligent power supply cable not only can realize the safe transmission of electric energy, but also can realize the accurate real-time intelligent monitoring of cable power load operation conditions.

Description

technical field [0001] The invention relates to the technical field of power cables, in particular to a power cable capable of accurately and timely monitoring the operating temperature of the cable. Background technique [0002] Power cable is a cable product used to transmit and distribute high-power electric energy in the main line of the power system. With the continuous expansion of the application field of power cables, the laying environment of power cables has become more complex, and power cables have developed from simple power transmission to multi-functional and multi-purpose. Moreover, the number of applications of power cables in railway power supply lines is also increasing day by day. The working status of power cables determines the quality and safety of power supply to a large extent; prevent cable failures, reduce the failure rate during cable operation, and improve cable performance. The reliability of power supply is particularly important to the safe a...

AI Technical Summary

Problems solved by technology

However, when the temperature measuring optical fiber is placed in the power cable for temperature measurement, the power cable will be stretched, squeezed and bent during laying or use, which may not only cause various mechanical damage to the optical fiber, but also damage the optical fiber. The working posture of the optical fiber causes the temperature measuring fiber to generate polarized light, resulting in a large temperature measurement error. For this reason, the existing optical fibers used for online temperature measurement of power cables often have a relatively complicated sheath layer, and this sheath layer It will block or delay the heat transfer of the cable or form uneven conduction, which will cause a large measurement error in the temperature measuring fiber

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