Phase-change temperature-control type high-voltage cable

A high-voltage cable, phase change temperature control technology, applied in the direction of insulated cables, cables, power cables with shielding layer/conductive layer, etc., can solve the problem of excessive temperature rise of cables, high thermal resistance, unfavorable heat dissipation and cooling of cable conductors, etc. problems, to achieve the effect of improving thermal stability

Inactive Publication Date: 2014-09-10
STATE GRID CORP OF CHINA +1
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  • Abstract
  • Description
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Problems solved by technology

The thermal resistance of the above-mentioned filling materials is high and the distribution is uneven, which affects the efficiency of heat transfer to a certain extent, and is not conducive to the heat dissipation and cooling of the cable conductor
In severe cases, it may cause the local temperature rise of the cable to be too high, and even cause thermal breakdown

Method used

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  • Phase-change temperature-control type high-voltage cable
  • Phase-change temperature-control type high-voltage cable
  • Phase-change temperature-control type high-voltage cable

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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] The invention optimizes the filling material of high-voltage cross-linked polyethylene cables based on the organic composite phase change material, and proposes a self-cooling filling material with strong heat conduction. While increasing the thermal conductivity and reducing the thermal resistance of the filling layer, the transient temperature rise of the high-voltage cable can be effectively reduced by taking advantage of the large heat capacity of phase change cooling. Thus, thermal breakdown caused by long-term cycle local overheating of the high-voltage cable is prevented, and the service life of the high-voltage cable is effectively extended. Not only that, the use of heat conduction-enhanced composite phase-change materials can also greatly improve the heat conduction efficiency of the filling layer, combined with phase...

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Abstract

The invention discloses a phase-change temperature-control type high-voltage cable, and relates to the technical field of cables. The cable comprises an inner cable core and an outer cable layer, the inner cable core sequentially comprises a cable core body, an insulating layer and a shielding layer from inside to outside, the outer cable layer sequentially comprises a wrapping layer, an inner protective layer, an armor layer and an outer protective layer from inside to outside, a filling layer is disposed between the inner cable core and the outer cable layer, and the filling layer is made of a composite phase-change material. The cable saves energy, is environmentally friendly, achieves automatic temperature control, improves heat dissipation through the phase-change material, improves current-carrying performance, the overload capacity and heat stability, and prolongs service life.

Description

technical field [0001] The invention relates to the technical field of high voltage cables. Background technique [0002] The transmission capacity of a high-voltage cable depends on the temperature rise of the cable's inner and outer insulation materials in a state of thermal equilibrium. For cables with conventional structures, the heat generated by the conductor passes through the inner and outer shielding layers, insulation layer, filling layer, inner sheath, steel tape armor, PVC sheath, and finally dissipates into the air or soil. At present, the filling materials used in high-voltage cables include glass fiber, polyester fiber, polypropylene (PP) and polyethylene mixture, cotton yarn, polypropylene (PP) rope, etc. Its main function is to keep the cable round, reduce the amount of rubber, reduce costs and increase the strength of the cable. The above-mentioned filler materials have high thermal resistance and uneven distribution, which affects the efficiency of heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/42
Inventor 郭刚郜志郝春生李雪松姚孟陈恒
Owner STATE GRID CORP OF CHINA
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