High-voltage transmission power cable

A high-voltage power transmission and power cable technology, which is applied to power cables with shielding layers/conductive layers, insulated cables, cables, etc., can solve problems such as difficult to find breakpoints, and solve the problem of long-term large-scale power outages, increase hardness, Effect of Resistivity Reduction

Active Publication Date: 2015-01-21
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 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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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1: a 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, the insulating layer is arranged on the outside of the conductor shielding layer, and the three conductors are arranged on the protective layer inside; also includes a cylindrical fixing device, the cylindrical fixing device is located in the protective layer; the side of the cylindrical fixing device is equidistantly provided with 3 arc-shaped grooves; the 3 conductors 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 6 terminal breakpoint detection units The point detection units are equidistantly arranged on the hi...

Embodiment 2

[0058] On the basis of Embodiment 1, the first switch, the second switch, and the third switch all use controllable thyristors.

[0059] Wherein, the conductor is made of aluminum alloy material, and the weight ratio of the aluminum alloy material is as follows: aluminum: 1000 parts; lutetium: 2 parts; manganese: 13 parts;

[0060] After preparing the aluminum alloy raw materials according to the above weight ratio, firstly, the melting temperature is 830°C, after stirring, degassing and refining with hexachlorobenzene, continuous casting is carried out using a continuous casting machine, and continuous casting is made into an aluminum alloy ingot of Φ120mm;

[0061] Then, an aluminum alloy rod of Φ35mm is made by hot extrusion at 420°C with an extruder;

[0062] Then, perform annealing treatment at 420°C for 50 hours;

[0063] Finally, a Φ4mm aluminum-lutetium-manganese alloy wire was prepared by drawing eight times with a wire drawing machine.

Embodiment 3

[0065] 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:

[0066] Aluminum: 1000 parts; Lutetium: 3 parts; Manganese: 14 parts;

[0067] After preparing the aluminum alloy raw materials according to the above weight ratio, firstly, the melting temperature is 830°C, after stirring, degassing and refining with hexachlorobenzene, continuous casting is carried out using a continuous casting machine, and continuous casting is made into an aluminum alloy ingot of Φ120mm;

[0068] Then, an aluminum alloy rod of Φ35mm is made by hot extrusion at 420°C with an extruder;

[0069] Then, perform annealing treatment at 420°C for 50 hours;

[0070] Finally, a Φ4mm aluminum-lutetium-manganese alloy wire was prepared by drawing eight times with a wire drawing machine.

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Abstract

The invention discloses a high-voltage transmission power cable. The high-voltage transmission power cable comprises three conductors, a conductor shielding layer, an insulating layer and a protecting layer. The conductor shielding layer is arranged outside the conductors, the insulating layer is arranged outside the conductor shielding layer, and the three conductors are arranged in the protecting layer. The high-voltage transmission power cable further comprises a cylindrical fixing device located in the protecting layer. Three arc-shaped grooves are formed in the side face of the cylindrical fixing device at equal intervals. The three conductors are located in the arc-shaped grooves respectively. A cavity formed among the conductors, the cylindrical fixing device and the protecting layer is filled with insulating filler. The high-voltage transmission power cable further comprises a far-end breakpoint detection unit and N terminal breakpoint detection units. The N terminal breakpoint detection units are arranged on a high-voltage transmission power cable circuit at equal intervals. N is greater than or equal to two. The power cable has no short-circuit problem caused by friction; once the power cable has an open-circuit problem, an open-circuit point can be judged rapidly, the hardness of a wire core is high, and electrical resistivity is low.

Description

technical field [0001] The invention relates to the technical field of high-voltage power transmission, in particular to a high-voltage power transmission power cable. Background technique [0002] 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 products used to transmit and distribute high-power electric energy in the main line of the power system, including 1-500KV and above various voltage levels and various insulated power cables. [0003] The basic structure of a power cable consists of four part...

Claims

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Application Information

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IPC IPC(8): H01B9/02H01B7/18H01B7/32H01B1/02
CPCH01B1/02H01B1/023H01B7/18H01B7/32H01B7/40H01B9/02
Inventor 谢安军
Owner STATE GRID CORP OF CHINA
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