High voltage power transmission power cable system

A power cable and high-voltage power transmission technology, which is applied to power cables with shielding layers/conductive layers, insulated cables, cables, etc., can solve problems such as sliding friction, difficulty in finding breakpoints, and short circuits in insulating layers, so as to improve hardness and solve problems. The problem of long-term large-area power failure and the effect of reducing the resistivity

Inactive Publication Date: 2016-07-13
谢安军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention: first, the phenomenon of sliding friction easily occurs between the A phase, B phase and C phase of the existing three-phase power cable, and a short circuit will occur once the insulating layer is worn out after a long time; Second, once there is an open circuit problem in the power cable, it is very difficult to find the open circuit point, which will lead to long-term and large-scale power outages

Method used

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  • High voltage power transmission power cable system
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  • High voltage power transmission power cable system

Examples

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Embodiment 1

[0039] Embodiment 1: A high-voltage transmission power cable system, including 3 conductors, a conductor shielding layer, an insulating layer, and a protective layer; the conductor shielding layer is arranged on the outside of the conductor, the insulating layer is arranged on the outside of the conductor shielding layer, the conductor, the conductor shielding layer Layer and insulating layer are set in the protective layer; also includes a cylindrical fixing device; the side of the cylindrical fixing device is equidistantly provided with 3 arc-shaped grooves; each arc-shaped groove is provided with a Conductor; the cavity formed between the conductor, the cylindrical fixing device and the protective layer is filled with an insulating filler; it also includes a remote breakpoint detection unit and 4 terminal breakpoint detection units; the 4 terminal breakpoints The detection units are equidistantly arranged on the high-voltage transmission power cable line;

[0040] Among the...

Embodiment 2

[0057] On the basis of Embodiment 1, the first switch, the second switch, and the third switch all use controllable thyristors.

[0058] Wherein, the conductor is made of aluminum alloy material, and the weight ratio of the aluminum alloy material is as follows: aluminum: 1000 parts; erbium: 8 parts; titanium: 4 parts;

[0059] After preparing the aluminum alloy raw materials according to the above weight ratio, firstly, the melting temperature is 800°C, after stirring, degassing and refining with hexachlorobenzene, continuous casting is performed with a continuous casting machine, and continuous casting is made into an aluminum alloy ingot of Φ120mm;

[0060] Then, an aluminum alloy rod of Φ30mm is made by hot extrusion at 420°C with an extruder;

[0061] Then, perform annealing treatment at 420°C for 50 hours;

[0062] Finally, a Φ4mm aluminum-erbium-titanium alloy wire was prepared by drawing eight times with a wire drawing machine.

Embodiment 3

[0064] Others are exactly the same as in Example 1, wherein the conductor is made of an aluminum alloy material, and the weight ratio of the aluminum alloy material is as follows:

[0065] Aluminum: 1000 parts; Erbium: 9 parts; Titanium: 5 parts;

[0066] After preparing the aluminum alloy raw materials according to the above weight ratio, firstly, the melting temperature is 800°C, after stirring, degassing and refining with hexachlorobenzene, continuous casting is performed with a continuous casting machine, and continuous casting is made into an aluminum alloy ingot of Φ120mm;

[0067] Then, an aluminum alloy rod of Φ30mm is made by hot extrusion at 420°C with an extruder;

[0068] Then, perform annealing treatment at 420°C for 50 hours;

[0069] Finally, a Φ4mm aluminum-erbium-titanium alloy wire was prepared by drawing eight times with a wire drawing machine.

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Abstract

The invention discloses a high voltage power transmission power cable system, including three conductors, conductor shielding layers, insulating layers and a protective layer. The conductor shielding layers are arranged outside the conductors, the insulating layers are arranged outside the conductor shielding layers, and the conductors, the conductor shielding layers and the insulating layers are arranged in the protective layer; the system also includes cylindrical fixing devices; side faces of the cylindrical fixing devices are provided with three arc-shaped grooves at equal intervals; each arc-shaped groove is internally provided with one conductor; insulating fillers are filled in a cavity formed among the conductors, the cylindrical fixing devices and the protective layer; and the system also includes a far-end breakpoint detection unit and N terminal breakpoint detection units; and the N terminal breakpoint detection units are arranged on a high voltage power transmission power cable line at equal intervals, wherein N>=2. The problem of a short circuit caused by friction does not occur in the power cable provided by the invention, and once the problem of an open circuit occurs in the power cable, an open circuit point can be quickly judged.

Description

[0001] This application is a divisional application of a patent application with an application date of November 3, 2014, an application number of 201410610596.7, and an invention title of "a high-voltage power transmission power cable system". technical field [0002] The invention relates to the technical field of high-voltage power transmission, in particular to a high-voltage power transmission power cable system. Background technique [0003] With the rapid development of the national economy, the amount and scope of use of power cables as the main artery of the national economy are increasing. Power cables are cables used to transmit and distribute electrical energy. It is often used in urban underground power grids, outgoing lines of power stations, internal power supply of industrial and mining enterprises, and underwater transmission lines across rivers and seas. In power lines, the proportion of power cables is gradually increasing. Power cables are cable product...

Claims

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Application Information

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IPC IPC(8): H01B7/32H01B7/18H01B9/02H01B1/02G01R31/08
CPCH01B7/1805G01R31/083H01B1/023H01B7/32H01B9/02
Inventor 梁龙
Owner 谢安军
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