High voltage transmission power cable system

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

Inactive Publication Date: 2016-05-25
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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Examples

Experimental program
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Effect test

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 transmission power cable system. The high voltage transmission power cable system comprises three conductors, a conductor shielding layer, an insulating layer and a protection layer, wherein the conductor shielding layer is arranged outside the conductors, the insulating layer is arranged outside the conductor shielding layer, and the conductors, the conductor shielding layer and the insulating layer are arranged in the protection layer. The high voltage transmission power cable system also comprises a cylindrical fixing device, wherein three arc grooves are formed in the side surface of the cylindrical fixing device in an equally spaced manner; one conductor is arranged in each arc groove; and cavities formed among the conductors, the cylindrical fixing device and the protection layer are respectively filled with insulating fillers. The high voltage transmission power cable system also comprises a remote-end breakpoint detection unit and N terminal breakpoint detection units, wherein the N terminal breakpoint detection units are arranged on a circuit of a high voltage transmission power cable in an equally spaced manner; and N is greater than or equal to 2. By adopting the high voltage transmission power cable system, the short-circuit problem of the power cable caused by the friction can be avoided; and once the power cable has the open-circuit problem, an open-circuit problem can be rapidly determined.

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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Patent Type & Authority Applications(China)
IPC IPC(8): H01B9/02H01B7/32H01B7/02H01B1/02
CPCH01B1/023H01B7/02H01B7/32H01B9/02
Inventor 梁龙
Owner 谢安军
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