CN105810283A - High-strength low-electrical-resistivity high-voltage transmission power cable - Google Patents
High-strength low-electrical-resistivity high-voltage transmission power cable Download PDFInfo
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- CN105810283A CN105810283A CN201610204532.6A CN201610204532A CN105810283A CN 105810283 A CN105810283 A CN 105810283A CN 201610204532 A CN201610204532 A CN 201610204532A CN 105810283 A CN105810283 A CN 105810283A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B9/00—Power cables
- H01B9/02—Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/02—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors mainly consisting of metals or alloys
- H01B1/023—Alloys based on aluminium
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
- H01B7/328—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks comprising violation sensing means
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/40—Insulated conductors or cables characterised by their form with arrangements for facilitating mounting or securing
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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
The application is the applying date is 2014-10-15, and application number is 201410544511.X, and denomination of invention is the divisional application of the patent application of high intensity low-resistivity high voltage power transmission power cable.
Technical field
The present invention relates to high voltage power transmission technical field, be specifically related to high intensity low-resistivity high voltage power transmission power cable.
Background technology
Along with the fast development of national economy, consumption and the scope of use as the aortal power cable of national economy are increasing.Power cable is the cable for transmitting and distribute electric energy.Be usually used in Urban Underground electrical network, the lead line of electric station, industrial and mining establishment in-line power and cross river, excessively sea submarine transmission line.In power circuit, the proportion shared by power cable is just gradually increased.Power cable is in order to transmit and to distribute the cable product of high-power power in the basic routing line of power system, including 1-500KV and any of the above electric pressure, the power cable of various insulation.
The basic structure of power cable is made up of core (conductor), insulating barrier, screen layer and protective layer four part.Core is the current-carrying part of power cable, is used for carrying electric energy, is the major part of power cable.Insulating barrier is will to be electrically isolated from each other between core and the earth and out of phase core, it is ensured that electric energy is carried, and is indispensable ingredient in power cable structure.Screen layer, because the electric current that electric power cable passes through is relatively larger, can produce magnetic field around electric current, in order to not affect other element, and can this electromagnetic-field-shielded in cable so adding screen layer.The effect of protective layer is the intrusion from introduced contaminants and moisture of the protection power cable, and prevents external force from directly damaging power cable.
It is exactly A phase, B phase, C phase conductor is all cylindrical that existing three-phase electrical cable exists very big defect, so each mutually between easily sliding friction, of long duration, it is easy to occur between each phase short-circuit.
Three-phase electrical cable a problem is also that, once there is open circuit problem, it is very difficult to searches trip point, thus long-time large-area power-cuts phenomenon can be caused.
The core of existing power cable is generally adopted aluminum alloy materials to be prepared, and the hardness of aluminum alloy materials is not high enough, then just adds other composition in aluminum alloy materials so that hardness improves, but can cause that resistivity significantly rises.
Summary of the invention
The technical problem to be solved in the present invention:
First, the phenomenon of sliding friction easily occurs between the A phase of existing three-phase electrical cable, B phase, C phase, of long duration once insulating barrier has been ground away arises that short circuit；
Second, power cable is once there is open circuit problem, it is very difficult to search trip point, thus long-time large-area power-cuts phenomenon can be caused.
3rd, the core of existing power cable is generally adopted aluminum alloy materials to be prepared, and the hardness of aluminum alloy materials is not high enough, then just adds other composition in aluminum alloy materials so that hardness improves, but can cause that resistivity significantly rises.
In order to solve above technical problem, technical scheme is as follows:
High intensity low-resistivity high voltage power transmission power cable, including 3 conductors, conductor shield, insulating barrier, protective layers；Conductor shield is arranged on the outside of conductor, and insulating barrier is arranged on the outside of conductor shield, and 3 conductors are arranged in protective layer；Also including cylindrical fixture, cylindrical fixture is positioned at protective layer；The side spaced set of described cylindrical fixture has 3 circular grooves；3 described conductors lay respectively at circular groove；The cavity formed between described conductor, cylindrical fixture, protective layer fills insulation filler；
Also include far-end breaking point detection unit, N number of terminal breaking point detection unit；Described N number of terminal breaking point detection unit spaced set is on high intensity low-resistivity high voltage power transmission power cable line；N≥2；
Wherein, N number of terminal breaking point detection unit is from left end to right-hand member successively called after: the 1st terminal breaking point detection unit, the i-th terminal breaking point detection unit, N terminal breaking point detection unit；1≤i≤N；
Described far-end breaking point detection unit includes master controller unit, total wireless communication unit, keyboard unit, display unit；Total wireless communication unit, keyboard unit, display unit are connected with the I/O port of master controller unit respectively；
Described terminal breaking point detection unit includes 3 conductiving metal strips, the first switch, second switch, the 3rd switch, controller unit, wireless communication unit；
Wherein, 3 conductor called afters: the first conductor, the second conductor, the 3rd conductor；3 conductiving metal strip called afters: the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip；
First conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the first conductiving metal strip electrically connects the first conductor, and the other end is positioned at one end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of second switch；
Second conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the second conductiving metal strip electrically connects the second conductor, and the other end is positioned at the other end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of the 3rd switch；
3rd conductiving metal strip is through conductor shield, insulating barrier, protective layer, one end electrical connection the 3rd conductor of the 3rd conductiving metal strip, and the other end is positioned at the outside of protective layer and electrically connects the other end of second switch and the other end of the 3rd switch simultaneously；
Described the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip outer surface be provided with insulating barrier；
First switch, second switch, the 3rd switch all contain control end, and the first switch, second switch, the 3rd end that controls switched are connected with the I/O port of controller unit respectively；
Controller unit is by wireless communication unit and master controller unit communication；
Wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows: aluminum: 1000 parts；Neodymium: 0.5-0.8 part；Boron: 3-6 part；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor.
Technical scheme more preferably, described total wireless communication unit, wireless communication unit all adopt gprs communication module.
Technical scheme more preferably, described display unit adopts numeral method.
Technical scheme more preferably, described master controller unit and controller unit all adopt MSP430 single-chip microcomputer.
Technical scheme more preferably, described the first switch, second switch, the 3rd switch all adopt relay.
Technical scheme more preferably, described the first switch, second switch, the 3rd switch all adopt controlled thyristor.
Compared with prior art, beneficial effects of the present invention: first, the power cable A phase of the present invention, B phase, C fix firm, do not contact each other, do not have the phenomenon of sliding friction, thus without the short circuit problem occurring that friction causes；Second, power cable is once there is open circuit problem, it is possible to quickly judge trip point, solves the long-time large-area power-cuts problem caused because of power cable breaking.
3rd, the core conductor of the power cable of the present invention adopts aluminum alloy materials to prepare, and while hardness improves, resistivity reduces on the contrary.
Accompanying drawing explanation
Fig. 1 is the structural representation of power cable of the present invention.
Wherein, 1 is conductor, and 2 is conductor shield, and 3 is insulating barrier, and 4 is cylindrical fixture, 5 protective layers.
Fig. 2 is the connection diagram of power cable switch sections of the present invention.
Fig. 3 is far-end breaking point detection unit of the present invention and terminal breaking point detection unit principle block diagram.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1: high intensity low-resistivity high voltage power transmission power cable, including 3 conductors, conductor shield, insulating barrier, protective layers；Conductor shield is arranged on the outside of conductor, and insulating barrier is arranged on the outside of conductor shield, and 3 conductors are arranged in protective layer；Also including cylindrical fixture, cylindrical fixture is positioned at protective layer；The side spaced set of described cylindrical fixture has 3 circular grooves；3 described conductors lay respectively at circular groove；The cavity formed between described conductor, cylindrical fixture, protective layer fills insulation filler；Also include far-end breaking point detection unit, 6 terminal breaking point detection unit；6 described terminal breaking point detection unit spaced sets are on high intensity low-resistivity high voltage power transmission power cable line；
Wherein, 6 terminal breaking point detection unit are from left end to right-hand member successively called after: the 1st terminal breaking point detection unit, the 2nd terminal breaking point detection unit, the 3rd terminal breaking point detection unit, the 4th terminal breaking point detection unit, the 5th terminal breaking point detection unit, the 6th terminal breaking point detection unit；
Described far-end breaking point detection unit includes master controller unit, total wireless communication unit, keyboard unit, display unit；Total wireless communication unit, keyboard unit, display unit are connected with the I/O port of master controller unit respectively；
Described terminal breaking point detection unit includes 3 conductiving metal strips, the first switch, second switch, the 3rd switch, controller unit, wireless communication unit；
Wherein, 3 conductor called afters: the first conductor, the second conductor, the 3rd conductor；3 conductiving metal strip called afters: the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip；
First conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the first conductiving metal strip electrically connects the first conductor, and the other end is positioned at one end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of second switch；
Second conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the second conductiving metal strip electrically connects the second conductor, and the other end is positioned at the other end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of the 3rd switch；
3rd conductiving metal strip is through conductor shield, insulating barrier, protective layer, one end electrical connection the 3rd conductor of the 3rd conductiving metal strip, and the other end is positioned at the outside of protective layer and electrically connects the other end of second switch and the other end of the 3rd switch simultaneously；
Described the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip outer surface be provided with insulating barrier；
First switch, second switch, the 3rd switch all contain control end, and the first switch, second switch, the 3rd end that controls switched are connected with the I/O port of controller unit respectively；
Controller unit and master controller unit communication.
Wherein, described total wireless communication unit, wireless communication unit all adopt gprs communication module；Display unit adopts numeral method；Master controller unit and controller unit all adopt MSP430 single-chip microcomputer.First switch, second switch, the 3rd switch all adopt relay.
Wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows: aluminum: 1000 parts；Neodymium: 0.5 part；Boron: 3 parts；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor.
Embodiment 2:
On the basis of embodiment 1, the first switch, second switch, the 3rd switch all adopt controlled thyristor.
Wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows: aluminum: 1000 parts；Neodymium: 0.6 part；Boron: 4 parts；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor.
Embodiment 3:
Other is just the same with embodiment 1, and wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows:
Aluminum: 1000 parts；Neodymium: 0.7 part；Boron: 5 parts；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor.
Embodiment 4:
Other is just the same with embodiment 1, and wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows:
Aluminum: 1000 parts；Neodymium: 0.8 part；Boron: 6 parts；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor.
In above 4 embodiments, the changing value of resistivity and hardness is as shown in table 1:
Table 1:
By above table 1 it appeared that the aluminium alloy conductor hardness of the present invention is obviously improved, resistivity reduces on the contrary, so the power cable conductor performance that the aluminium alloy conductor of the present invention is stranding into is obviously improved.
The method adopting power cable of the present invention lookup trip point is as follows:
1, successively the end of the first conductor of high intensity low-resistivity high voltage power transmission power cable left end and the second conductor, the first conductor and the 3rd conductor, the second conductor and the 3rd conductor is applied 120V DC voltage, simultaneously one DC ammeter of series connection in circuit；
2, control master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
If 3 DC ammeter have reading entirely, the trip point right side at N/2 terminal breaking point detection unit is described；If DC ammeter is not entirely have reading, the trip point left side at N/2 terminal breaking point detection unit is described；
If 4 trip points are on the right side of N/2 terminal breaking point detection unit, then control master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2+1 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
If trip point is in the left side of N/2 terminal breaking point detection unit, then controls master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2-1 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
5, according to the method for step 3 Yu step 4, until finding the position of trip point；
If when 6 first switches and second switch Guan Bi, DC ammeter does not all have reading, illustrates that trip point is at the first conductor；If when the first switch and the 3rd switch Guan Bi, DC ammeter does not all have reading, illustrates that trip point is at the second conductor；If when second switch and the 3rd switch Guan Bi, DC ammeter does not all have reading, illustrates that trip point is at the 3rd conductor, thus finding out which root conductor trip point is positioned at.
Claims (2)
1. high intensity low-resistivity high voltage power transmission power cable, including 3 conductors, conductor shield, insulating barrier, protective layers；Conductor shield is arranged on the outside of conductor, and insulating barrier is arranged on the outside of conductor shield, and 3 conductors are arranged in protective layer；It is characterized in that, also including cylindrical fixture, cylindrical fixture is positioned at protective layer；The side spaced set of described cylindrical fixture has 3 circular grooves；3 described conductors lay respectively at circular groove；The cavity formed between described conductor, cylindrical fixture, protective layer fills insulation filler；
Also include far-end breaking point detection unit, N number of terminal breaking point detection unit；Described N number of terminal breaking point detection unit spaced set is on high intensity low-resistivity high voltage power transmission power cable line；N≥2；
Described far-end breaking point detection unit includes master controller unit, total wireless communication unit, keyboard unit, display unit；Total wireless communication unit, keyboard unit, display unit are connected with the I/O port of master controller unit respectively；
Described terminal breaking point detection unit includes 3 conductiving metal strips, the first switch, second switch, the 3rd switch, controller unit, wireless communication unit；
Wherein, 3 conductor called afters: the first conductor, the second conductor, the 3rd conductor；3 conductiving metal strip called afters: the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip；
First conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the first conductiving metal strip electrically connects the first conductor, and the other end is positioned at one end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of second switch；
Second conductiving metal strip is through conductor shield, insulating barrier, protective layer, and one end of the second conductiving metal strip electrically connects the second conductor, and the other end is positioned at the other end of the outside of protective layer and the first switch of electrical connection simultaneously and one end of the 3rd switch；
3rd conductiving metal strip is through conductor shield, insulating barrier, protective layer, one end electrical connection the 3rd conductor of the 3rd conductiving metal strip, and the other end is positioned at the outside of protective layer and electrically connects the other end of second switch and the other end of the 3rd switch simultaneously；
Described the first conductiving metal strip, the second conductiving metal strip, the 3rd conductiving metal strip outer surface be provided with insulating barrier；
First switch, second switch, the 3rd switch all contain control end, and the first switch, second switch, the 3rd end that controls switched are connected with the I/O port of controller unit respectively；
Controller unit is by wireless communication unit and master controller unit communication；
Wherein, described conductor adopts aluminum alloy materials to be prepared from, and the weight proportion of this aluminum alloy materials is as follows: aluminum: 1000 parts；Neodymium: 0.5 part；Boron: 3 parts；Ferrum: 1 part；Copper: 1.5 parts；Silicon: 1.5 parts；Magnesium: 2.5 parts；Zinc: 0.5 part；Lanthanum: 0.01 part；
The first step: preparing after aluminium alloy stock according to above-mentioned weight portion, first, smelting temperature is 730 DEG C, after stirring, refine, slagging-off, use conticaster direct casting, direct casting becomes the aluminium alloy cast ingot of Φ 120mm, is then passed through the 6-8 second and drops to rapidly 430 DEG C；
Second step: adopt extruder to make the aluminium alloy rod of Φ 30mm 430 DEG C of hot extrusions；
3rd step: be incubated 1 hour in noble gas, then cool to 300 DEG C；
4th step: adopt drawing machine by the drawing of 6-8 time, prepare into the aluminium alloy conductor of Φ 4mm, described aluminium alloy conductor is stranding into described conductor；
Described total wireless communication unit, wireless communication unit all adopt gprs communication module；
Described display unit adopts numeral method；
Described master controller unit and controller unit all adopt MSP430 single-chip microcomputer；
Described the first switch, second switch, the 3rd switch all adopt relay.
2. high intensity low-resistivity high voltage power transmission power cable according to claim 1, it is characterised in that the method that power cable searches trip point is as follows:
1) successively the end of the first conductor of high intensity low-resistivity high voltage power transmission power cable left end and the second conductor, the first conductor and the 3rd conductor, the second conductor and the 3rd conductor is applied 120V DC voltage, simultaneously one DC ammeter of series connection in circuit；
2) control master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
3) if DC ammeter has reading entirely, the trip point right side at N/2 terminal breaking point detection unit is described；If DC ammeter is not entirely have reading, the trip point left side at N/2 terminal breaking point detection unit is described；
4) if trip point is on the right side of N/2 terminal breaking point detection unit, then control master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2+1 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2+1 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
If trip point is in the left side of N/2 terminal breaking point detection unit, then controls master controller unit by keyboard unit and send switch Guan Bi and ON-and OFF-command to the controller of N/2-1 terminal breaking point detection unit；When 120V DC voltage is applied to the end of the first conductor and the second conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi the first switch, and interval controls to disconnect the first switch for 10 seconds；When 120V DC voltage is applied to the end of the first conductor and the 3rd conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi second switch, and interval controls to disconnect second switch for 10 seconds；When 120V DC voltage is applied to the end of the second conductor and the 3rd conductor, the controller of N/2-1 terminal breaking point detection unit controls Guan Bi the 3rd switch, and interval controls to disconnect the 3rd switch for 10 seconds；
5) according to step 3) with step 4) method, until finding the position of trip point；
6) if the first switch closes with second switch, DC ammeter does not all have reading, illustrates that trip point is at the first conductor；If when the first switch and the 3rd switch Guan Bi, DC ammeter does not all have reading, illustrates that trip point is at the second conductor；If when second switch and the 3rd switch Guan Bi, DC ammeter does not all have reading, illustrates that trip point is at the 3rd conductor, thus finding out which root conductor trip point is positioned at.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610204532.6A CN105810283A (en) | 2014-10-15 | 2014-10-15 | High-strength low-electrical-resistivity high-voltage transmission power cable |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410544511.XA CN104299715B (en) | 2014-10-15 | 2014-10-15 | High intensity low-resistivity high voltage power transmission power cable |
| CN201610204532.6A CN105810283A (en) | 2014-10-15 | 2014-10-15 | High-strength low-electrical-resistivity high-voltage transmission power cable |
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| CN106229049B (en) * | 2016-07-22 | 2017-06-09 | 福建南新电缆有限公司 | It is a kind of to facilitate detection formula cable |
| CN109599218A (en) * | 2017-10-01 | 2019-04-09 | 镇江长河电力技术有限公司 | A kind of low-loss anticorrosion cable |
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| US20080100307A1 (en) * | 2006-11-01 | 2008-05-01 | Abb Research Ltd. | Cable fault detection |
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| CN104299715A (en) | 2015-01-21 |
| CN104299715B (en) | 2016-11-02 |
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