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High-strength low-electrical-resistivity high-voltage transmission power cable

A low-resistivity, high-voltage power transmission technology, applied to power cables with shielding layers/conductive layers, insulated cables, cables, etc., can solve problems such as difficult to find breakpoints, solve the problem of long-term large-scale power outages, and improve hardness , The effect of resistivity reduction

Inactive Publication Date: 2016-07-27
谢春梅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 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-strength low-electrical-resistivity high-voltage transmission power cable
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  • High-strength low-electrical-resistivity high-voltage transmission power cable

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Embodiment 1: High-strength low-resistivity high-voltage transmission power cable, 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, and the insulating layer is arranged on the outside of the conductor shielding layer. The conductor is arranged in the protective layer; it also includes a cylindrical fixing device, and the cylindrical fixing device is located in the protective layer; the side of the cylindrical fixing device is provided with three arc-shaped grooves at equal intervals; the three conductors They are respectively located in the arc-shaped groove; 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 6 terminal breakpoint detection units; the said The 6 terminal breakpoint detection units are equidistantl...

Embodiment 2

[0060] On the basis of Embodiment 1, the first switch, the second switch, and the third switch all use controllable thyristors.

[0061] Wherein, the conductor is made of aluminum alloy material, and the weight ratio of the aluminum alloy material is as follows: aluminum: 1000 parts; neodymium: 0.6 parts; boron: 4 parts; iron: 1 part; copper: 1.5 parts; : 1.5 parts; magnesium: 2.5 parts; zinc: 0.5 parts; lanthanum: 0.01 parts;

[0062] The first step: After preparing the aluminum alloy raw materials according to the above weight parts, firstly, the melting temperature is 730°C, after stirring, refining, and slag removal, the continuous casting machine is used to continuously cast aluminum alloy ingots of Φ120 mm, and then through Rapidly drop to 430°C in 6-8 seconds;

[0063] Step 2: Use an extruder to hot-extrude at 430°C to make a Φ30mm aluminum alloy rod;

[0064] Step 3: keep warm in an inert gas for 1 hour, then cool down to 300°C;

[0065] The fourth step: using a wir...

Embodiment 3

[0067] 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:

[0068] Aluminum: 1000 parts; Neodymium: 0.7 parts; Boron: 5 parts; Iron: 1 part; Copper: 1.5 parts; Silicon: 1.5 parts; Magnesium: 2.5 parts; Zinc: 0.5 parts; Lanthanum: 0.01 parts;

[0069] The first step: After preparing the aluminum alloy raw materials according to the above weight parts, firstly, the melting temperature is 730°C, after stirring, refining, and slag removal, the continuous casting machine is used to continuously cast aluminum alloy ingots of Φ120 mm, and then through Rapidly drop to 430°C in 6-8 seconds;

[0070] Step 2: Use an extruder to hot-extrude at 430°C to make a Φ30mm aluminum alloy rod;

[0071] Step 3: keep warm in an inert gas for 1 hour, then cool down to 300°C;

[0072] The fourth step: using a wire drawing machine to draw 6-8 times to prepare a Φ4mm aluminum alloy...

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Abstract

The invention discloses a high-strength low-electrical-resistivity high-voltage transmission power cable. The power cable comprises three conductors, conductor shielding layers, insulating layers and a protection layer, wherein the conductor shielding layers are arranged on the exteriors of the corresponding conductors; the insulating layers are arranged on the exteriors of the corresponding conductor shielding layers; the three conductors are arranged in the protection layer; the power cable also comprises a cylindrical fixing apparatus which is positioned in the protection layer; three circular-arc-shaped grooves are formed in the side face of the cylindrical fixing apparatus at equal intervals; the three conductors are positioned in the circular-arc-shaped grooves respectively; a cavity formed by the conductors, the circular-arc-shaped grooves and the protection layer is filled with an insulating filler; the power cable also comprises a far-end breaking point detection unit and N terminal breaking point detection units; and the N terminal breaking point detection units are arranged on the high-strength low-electrical-resistivity high-voltage transmission power cable at equal intervals. According to the power cable provided by the invention, the short-circuit problem caused by friction is prevented; when a power cable is in open circuit, breaking points can be determined rapidly; and in addition, the power cable is high in wire core hardness and low in electrical resistivity.

Description

[0001] This application is a divisional application of a patent application with an application date of 2014-10-15, an application number of 201410544511.X, and an invention name of a high-strength low-resistivity high-voltage transmission power cable. technical field [0002] The invention relates to the technical field of high-voltage power transmission, in particular to a high-strength low-resistivity high-voltage power transmission power cable. 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. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/02H01B7/32H01B7/40H01B9/02
CPCH01B1/023H01B7/328H01B7/40H01B9/02
Inventor 谢春梅
Owner 谢春梅
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