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A compound return line

A return line and wire technology, applied in the field of power cables, to achieve the effect of convenient power supply, reduced engineering costs, power supply and data communication

Active Publication Date: 2020-11-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the defects in the prior art, the present invention provides a composite return line to solve some or all of the problems mentioned in the background section

Method used

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  • A compound return line
  • A compound return line
  • A compound return line

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Embodiment Construction

[0032] Order that the invention object, technical solutions, and advantages of the embodiments more clearly below in conjunction with the present invention in the accompanying drawings, technical solutions of embodiments of the present invention will be clearly and fully described, obviously, the described embodiments some embodiments of the present invention rather than all embodiments. Based on the embodiments in the present invention, all other embodiments obtained without creative labor are not made in the premise of creative labor.

[0033] In the "Power Cable Engineering Design Specifications" (GB 50217-2007) of the return line are defined: Single core cables arranged parallel to the high-voltage line, so that an induced current to ground at both ends of the wire loop is formed. In the "power cable line operating procedures" (DL / T 1253-2013) was also performed on the return line states: single-core cable metal shield (metal jacket) single-point ground network, in order to ...

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Abstract

The invention provides a composite return wire which comprises return wires, a main insulation unit and an outer sheath in the radial direction from the inside to the outside and further comprises low-voltage power supply wires and / or a communication wire. The composite return wire is provided with a power-taking port in a position with the need for a power supply. The composite return wire provides power supply for an online monitoring device matched with the cable through the low-voltage power supply wires and the power-taking port. The composite return wire is provided with a conversion interface at a position where the online monitoring device matched with the cable needs to provide information and signal transmission. The composite return wire provides signal and information transmission for the online monitoring device matched with the cable through the communication wire and the conversion interface. According to the composite return wire, the functions of power supply and communication are fused on the basis that the composite return wire is used as a single-core cable outer metal sheath inductive current return wire, a return ground wire, the power supply wires and the communication wire are integrated in one body, the engineering cost is reduced, and the problem of monitoring power and communication of a power cable network is solved.

Description

Technical field [0001] Technical Field The present invention relates to a power cable, in particular to a composite return line. Background technique [0002] In the "Power Cable Engineering Design Specifications" (GB 50217-2007) of the return line are defined: Single core cables arranged parallel to the high-voltage line, so that an induced current to ground at both ends of the wire loop is formed. In the "power cable line operating procedures" (DL / T 1253-2013) was also performed on the return line states: single-core cable metal shield (metal jacket) single-point ground network, in order to suppress formation of single-phase earth fault current of , and reducing the metal of the external magnetic field induced voltage on the shield (metal sleeve), laid along the cable parallel line of low impedance ground wire. (Note: the general return line with an insulating layer). [0003] 110kV and above the single-core cables in the frequency may occur over cable or shock induced voltag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B7/18H01B7/02H01B7/295H01B7/282H01B7/24H01B7/32
CPCH01B7/0258H01B7/1875H01B7/24H01B7/282H01B7/295H01B7/32
Inventor 孙进李志远刘维功李琼陶丽楠时振堂
Owner CHINA PETROLEUM & CHEM CORP
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