CN104392788A - Power cable for high-voltage power transmission - Google Patents
Power cable for high-voltage power transmission Download PDFInfo
- Publication number
- CN104392788A CN104392788A CN201410753924.9A CN201410753924A CN104392788A CN 104392788 A CN104392788 A CN 104392788A CN 201410753924 A CN201410753924 A CN 201410753924A CN 104392788 A CN104392788 A CN 104392788A
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- Prior art keywords
- resistance
- wire
- unit
- power cable
- privates
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
- G08B13/12—Mechanical actuation by the breaking or disturbance of stretched cords or wires
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
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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
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/184—Sheaths comprising grooves, ribs or other projections
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
- Emergency Alarm Devices (AREA)
Abstract
The invention discloses a power cable for high-voltage power transmission. The power cable comprises three cable cores, insulation layers, screening layers, and a protection layer, and further comprises a first lead wire, a second lead wire and a third lead wire, wherein an insulation layer and a screening layer are arranged outside each cable core; the cable cores are arranged in the protection layer; a triangular fixing bracket is also arranged in the protection layer; an arc-shaped groove is formed in each side of the triangular fixing bracket; the cable cores are positioned in the arc-shaped grooves; a cavity formed among the cable cores, the triangular fixing bracket and the protection layer is filled with insulation fillers; every two of the first to third lead wires are tangent to each other; the first, second and third lead wires are arranged in the protection layer and are parallel to the cable cores respectively. According to the power cable provided by the invention, the stealing place can be known immediately when the protection layer of the power cable is stolen by a thief.
Description
Technical field
The present invention relates to a kind of high voltage power transmission power cable, belong to high voltage power transmission technical field.
Background technology
Along with the fast development of national economy, as the consumption of the aortal power cable of national economy and the scope of application increasing.Power cable is the cable for transmitting and distribute electric energy.Be usually used in Urban Underground electrical network, the lead line in power station, the in-line power of industrial and mining enterprises and cross river, excessively extra large submarine transmission line.In power circuit, the proportion shared by power cable increases just gradually.Power cable is in order to transmission and the cable product distributing high-power power in the basic routing line of electric power system, comprising 1-500KV and above various electric pressure, and the power cable of various insulation.
The basic structure of power cable is made up of core (conductor), insulating barrier, screen and protective layer four part.Core is the current-carrying part of power cable, is used for transmission of electric energy, is the major part of power cable.Insulating barrier is isolated from each other between core and the earth and out of phase core on electrically, and ensureing power delivery, is indispensable part in power cable structure.Screen, because the current ratio that electric power cable passes through is comparatively large, can produce magnetic field around electric current, in order to not affect other element, and can this electromagnetic-field-shielded in cable so add screen.The effect of protective layer is protection power cable from the intrusion of introduced contaminants and moisture, and prevents external force from directly damaging power cable.
Power cable can be divided into core and overcoat (overcoat refers to insulating barrier, screen and protective layer) two large divisions structure; be positioned at the core of innermost layer for electric energy transmitting; the overcoat be rolled in outside core has sandwich construction, realizes the functions such as shielding, insulation, anti-outside destroy respectively.At high pressure and above defeated, power distribution network; because voltage is higher, theft live electric cable often can cause thief's injures and deaths, therefore; it is not the copper material aiming at wire that present robber steals power circuit, has occurred the stolen event of a lot of 10kV power cable overcoat in this year.Because cable laying is hidden, and the anti-system of prison is not set, therefore cable shield is stolen does not cause power failure and being not easily found of short circuit accident, but leaves very large potential safety hazard.After some cable shield are stolen, although temporarily do not occur to have a power failure or personnel casualty accidents, but cable insulation degree of protection declines to a great extent, switching overvoltage, lightning overvoltage, harmonic wave overvoltage, personnel trample, damaged by rats, all will trigger short circuit, a certain phase short circuit blast, often cause many feeder lines short circuit simultaneously of laying in one ditch, cause large-area power-cuts, as can be seen here, robber has buried the serious potential safety hazard in many places to electric power system.Due to many overcoats stolen after cable be imbedded in underground, power department does not have the security situation of special monitoring of equipment cable so far, cannot learn that the overcoat of power cable is destroyed, thus can not adopt remedial measures in time, make the safety of electric power system and periphery personnel and environment be subject to serious threat.
By above description, can find just can find at once when theft power cable overcoat for robber and the place navigating to theft is the problem highly studied.
Existing three-phase high-voltage transmission of electricity power cable also exists that a very large defect is exactly A phase, B phase, C phase conductor are all cylindrical, each mutually between easily there is sliding friction, of long duration easily cause short circuit between each phase.
Summary of the invention
The technical problem to be solved in the present invention is: first, robber is difficult to be found when stealing the overcoat of high voltage power transmission power cable, leave very large potential safety hazard to transmission line, just can't find theft place at once when robber steals high voltage power transmission power cable overcoat at present.The second, existing three-phase high-voltage transmission of electricity power cable also exists that a very large defect is exactly A phase, B phase, C phase conductor are all cylindrical, each mutually between easily there is sliding friction, of long duration easily cause short circuit between each phase.
In order to realize solving above technical problem, the technical solution adopted in the present invention is: high voltage power transmission power cable, comprises three cores, insulating barrier, screen, protective layers; The outside of every root core sets gradually insulating barrier, screen; Three cores are arranged at the inside of protective layer; Protective layer inside is also provided with triangle fixed support; Support bracket fastened every one side all arranges circular groove with described triangle; Core is positioned at circular groove; Described core, the cavity formed between triangle fixed support and protective layer fill insulation filler;
Also comprise the first wire, the second wire, privates; The external diameter of the first described wire, the second wire, privates is tangent between two; The first described wire, the second wire, privates are arranged in protective layer; The first described wire, the second wire, privates are parallel with core respectively;
Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit, the 3rd AD unit, controller, display unit, alarm unit, the first DC power supply, the second DC power supply;
The left end of the first described wire is electrically connected one end of the first resistance, the other end of the first resistance is electrically connected the positive terminals of the first DC power supply, the negative terminals of the first DC power supply are electrically connected one end of the second resistance, and the other end of the second resistance is electrically connected the left end of the second wire;
The negative terminals of the first DC power supply are electrically connected the positive terminals of the second DC power supply simultaneously; One end of negative terminals electrical connection the 3rd resistance of the second DC power supply, the left end of the other end electrical connection privates of the 3rd resistance;
The right-hand member of the first described wire, the second wire, privates does not contact each other, and is provided with insulation protective jacket;
The voltage signal at the first resistance two ends is input to controller by the one AD unit;
The voltage signal at the second resistance two ends is input to controller by the 2nd AD unit;
The voltage signal at the 3rd resistance two ends is input to controller by the 3rd AD unit;
The input of display unit is connected with the display output port of controller;
The input of alarm unit is connected with the alarm signal output ends mouth of controller.
Further, the resistance of the first described resistance, the second resistance and the 3rd resistance is equal.
Further, the resistance of the first described resistance, the second resistance and the 3rd resistance is 1 ohm.
Further, the external diameter of the first described wire, the second wire and privates is equal, and thickness of insulating layer is all less than 3mm.
Further, the thickness of insulating layer of the first described wire, the second wire and privates is 1mm.
Further, the first described DC power supply is equal with the voltage of the second DC power supply, thus is convenient to analytical calculation theft point.
Further, described controller adopts AT89S52 chip microcontroller.
Further, described display unit adopts LCD1864 display screen, and the theft of being calculated by controller point shows.
Further, described alarm unit adopts buzzer warning.Robber can be had at theft power cable like this by sound prompting.
Further, a described AD unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809 chip.
Compared with prior art, the invention has the advantages that: high voltage power transmission power cable provided by the invention, when the place just immediately can knowing theft that time that robber steals power cable overcoat, effectively protect the safety of transmission line; Meanwhile, because robber wants to steal core, first must destroying protective layer, so power cable of the present invention also effectively prevent robber steal power cable core, and not consuming electric energy when not yet forming closed-loop path.Meanwhile, power cable A phase, B phase, C fix firmly, do not contact each other, there will not be the phenomenon of sliding friction, therefore there will not be the short circuit problem rubbing and cause.
Accompanying drawing explanation
Fig. 1 is the structural representation of high voltage power transmission power cable of the present invention.
Wherein, 1 is core; 2 is insulating barriers; 3 is screens; 4 is protective layers; 9 is triangle fixed supports.
Fig. 2 is three tangent schematic diagrames of wire in protective layer.
Wherein, 5 is first wires; 6 is second wires; 7 is privates; 8 is protective layers.
Fig. 3 is the theft point Real-Time Monitoring circuit theory schematic diagram that the present invention relates to.
Embodiment
Below in conjunction with accompanying drawing, invention is described in further detail.
With reference to Fig. 1,2,3, high voltage power transmission power cable, comprises three cores, insulating barrier, screen, protective layers; The outside of every root core sets gradually insulating barrier, screen; Three cores are arranged at the inside of protective layer; Protective layer inside is also provided with triangle fixed support; Support bracket fastened every one side all arranges circular groove with described triangle; Core is positioned at circular groove; Described core, the cavity formed between triangle fixed support and protective layer fill insulation filler; Also comprise the first wire, the second wire, privates; The external diameter of the first described wire, the second wire, privates is tangent between two; The first described wire, the second wire, privates are arranged in protective layer; The first described wire, the second wire, privates are parallel with core respectively; Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit, the 3rd AD unit, controller, display unit, alarm unit, the first DC power supply, the second DC power supply; The left end of the first described wire is electrically connected one end of the first resistance, the other end of the first resistance is electrically connected the positive terminals of the first DC power supply, the negative terminals of the first DC power supply are electrically connected one end of the second resistance, and the other end of the second resistance is electrically connected the left end of the second wire; The negative terminals of the first DC power supply are electrically connected the positive terminals of the second DC power supply simultaneously; One end of negative terminals electrical connection the 3rd resistance of the second DC power supply, the left end of the other end electrical connection privates of the 3rd resistance; The right-hand member of the first described wire, the second wire, privates does not contact each other, and is provided with insulation protective jacket; The voltage signal at the first resistance two ends is input to controller by the one AD unit; The voltage signal at the second resistance two ends is input to controller by the 2nd AD unit; The voltage signal at the 3rd resistance two ends is input to controller by the 3rd AD unit; The input of display unit is connected with the display output port of controller; The input of alarm unit is connected with the alarm signal output ends mouth of controller.
Wherein, described controller adopts AT89S52 chip microcontroller.Described display unit adopts LCD1864 display screen, and described alarm unit adopts buzzer warning, can have robber at theft power cable like this, and shown by LCD1864 display screen in the theft place of calculating by sound prompting.A described AD unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809 chip.
Wherein, the external diameter of the first described wire, the second wire and privates is 3cm, and wherein the thickness of insulating layer of wire is 1mm.
In the present embodiment, the length of power cable is 2000 meters, so the first wire, the second wire, the length of privates is also just respectively 2000 meters, the first wire, the second wire, the resistance of privates is respectively 10 ohm, and the voltage of the first DC power supply and the second DC power supply all selects 30V, the first resistance, second resistance, 3rd resistance is 1 ohm, thus ensure that the first resistance, the second resistance, the voltage at the 3rd resistance two ends can not more than 5V, and such AD unit could normal work.
The present invention can realize the principle stealing some Real-Time Monitoring: no matter robber steals the core of power cable, or (overcoat comprises insulating barrier to the overcoat of theft power cable, screen and protective layer), so all need first to destroy protective layer, because protective layer is durable, generally be not easy to destroy, therefore robber must adopt metal shear to cut off protective layer, and inside protective layer, be provided with the first wire, second wire, privates, due to the first wire, second wire, the external diameter of privates is tangent between two and the insulating barrier of wire is all very thin, in time adopting scissors to cut off protective layer, be bound to the first wire, second wire, privates is also cut off, exactly at scissors by the first wire, second wire, privates is cut off at that moment, first wire, second wire, the conductor of privates inside is connected to one piece by metal shear, the conductor at least having two wires can be electrically connected by metal shear, also the conductor of possibility three wires all can be electrically connected by metal shear.
At this time, the circuit in the present invention just defines closed-loop path, is likely that the first wire and the second wire form closed-loop path, is also likely that the second wire and privates form closed-loop path, also likely forms two closed-loop paths simultaneously.Once controller detects the first resistance, the second resistance or the 3rd resistance two ends have voltage just can judge have robber to steal power cable.
If just the first wire and the second wire define closed-loop path;
First, by the voltage at the first resistance two ends divided by the resistance of the first resistance, the electric current of closed-loop path is obtained;
Secondly, the voltage of the first DC power supply is divided by the electric current of closed-loop path, and calculated the all-in resistance of closed-loop path, all-in resistance deducts the resistance of the first resistance and the second resistance, namely obtains the total resistance value of the first wire and the second wire;
Finally, by formula R=ρ L/S, thus calculate theft place.(ρ and S is known parameters).
Claims (10)
1. high voltage power transmission power cable, comprises three cores, insulating barrier, screen, protective layers; The outside of every root core sets gradually insulating barrier, screen; Three cores are arranged at the inside of protective layer; It is characterized in that, protective layer inside is also provided with triangle fixed support; Support bracket fastened every one side all arranges circular groove with described triangle; Core is positioned at circular groove; Described core, the cavity formed between triangle fixed support and protective layer fill insulation filler;
Also comprise the first wire, the second wire, privates; The external diameter of the first described wire, the second wire, privates is tangent between two; The first described wire, the second wire, privates are arranged in protective layer; The first described wire, the second wire, privates are parallel with core respectively;
Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit, the 3rd AD unit, controller, display unit, alarm unit, the first DC power supply, the second DC power supply;
The left end of the first described wire is electrically connected one end of the first resistance, the other end of the first resistance is electrically connected the positive terminals of the first DC power supply, the negative terminals of the first DC power supply are electrically connected one end of the second resistance, and the other end of the second resistance is electrically connected the left end of the second wire;
The negative terminals of the first DC power supply are electrically connected the positive terminals of the second DC power supply simultaneously; One end of negative terminals electrical connection the 3rd resistance of the second DC power supply, the left end of the other end electrical connection privates of the 3rd resistance;
The right-hand member of the first described wire, the second wire, privates does not contact each other, and is provided with insulation protective jacket;
The voltage signal at the first resistance two ends is input to controller by the one AD unit;
The voltage signal at the second resistance two ends is input to controller by the 2nd AD unit;
The voltage signal at the 3rd resistance two ends is input to controller by the 3rd AD unit;
The input of display unit is connected with the display output port of controller;
The input of alarm unit is connected with the alarm signal output ends mouth of controller.
2. high voltage power transmission power cable according to claim 1, is characterized in that, the resistance of the first described resistance, the second resistance and the 3rd resistance is equal.
3. high voltage power transmission power cable according to claim 2, is characterized in that, the resistance of the first described resistance, the second resistance and the 3rd resistance is 1 ohm.
4. high voltage power transmission power cable according to claim 1, is characterized in that, the external diameter of the first described wire, the second wire and privates is equal, and thickness of insulating layer is all less than 3mm.
5. high voltage power transmission power cable according to claim 4, is characterized in that, the thickness of insulating layer of the first described wire, the second wire and privates is 1mm.
6. high voltage power transmission power cable according to claim 1, is characterized in that, the first described DC power supply is equal with the voltage of the second DC power supply.
7. high voltage power transmission power cable according to claim 1, is characterized in that, described controller adopts AT89S52 chip microcontroller.
8. high voltage power transmission power cable according to claim 1, is characterized in that, described display unit adopts LCD1864 display screen.
9. high voltage power transmission power cable according to claim 1, is characterized in that, described alarm unit adopts buzzer warning.
10. high voltage power transmission power cable according to claim 1, is characterized in that, a described AD unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809 chip.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610188578.3A CN105609205A (en) | 2014-12-10 | 2014-12-10 | High-voltage power transmission cable |
| CN201610192674.5A CN105609206A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
| CN201410753924.9A CN104392788A (en) | 2014-12-10 | 2014-12-10 | Power cable for high-voltage power transmission |
| CN201610192723.5A CN105702364A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410753924.9A CN104392788A (en) | 2014-12-10 | 2014-12-10 | Power cable for high-voltage power transmission |
Related Child Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610188578.3A Division CN105609205A (en) | 2014-12-10 | 2014-12-10 | High-voltage power transmission cable |
| CN201610192674.5A Division CN105609206A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
| CN201610189153.4A Division CN105761813A (en) | 2014-12-10 | 2014-12-10 | High-voltage power transmission power cable |
| CN201610192723.5A Division CN105702364A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104392788A true CN104392788A (en) | 2015-03-04 |
Family
ID=52610672
Family Applications (4)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610192723.5A Pending CN105702364A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
| CN201610192674.5A Pending CN105609206A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
| CN201410753924.9A Pending CN104392788A (en) | 2014-12-10 | 2014-12-10 | Power cable for high-voltage power transmission |
| CN201610188578.3A Pending CN105609205A (en) | 2014-12-10 | 2014-12-10 | High-voltage power transmission cable |
Family Applications Before (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610192723.5A Pending CN105702364A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
| CN201610192674.5A Pending CN105609206A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610188578.3A Pending CN105609205A (en) | 2014-12-10 | 2014-12-10 | High-voltage power transmission cable |
Country Status (1)
| Country | Link |
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| CN (4) | CN105702364A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117259483B (en) * | 2023-11-22 | 2024-01-26 | 烟台鼎宸铜业有限公司 | Tinned copper wire winding mechanism |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117323Y (en) * | 2007-08-29 | 2008-09-17 | 王世祥 | Anti-theft cable |
| CN101989470A (en) * | 2009-08-06 | 2011-03-23 | 广东科能通用电气有限公司 | Anti-theft cable |
| CN201868142U (en) * | 2010-10-20 | 2011-06-15 | 申祥龙 | Burglar alarm power cable |
| US20120105230A1 (en) * | 2010-10-27 | 2012-05-03 | Thomas Bockstoce | Anti-theft sensor system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258525Y (en) * | 1994-09-30 | 1997-07-30 | 吕杰 | Alarm rope lock |
| JP3444771B2 (en) * | 1997-12-03 | 2003-09-08 | 矢崎総業株式会社 | Short detection wire and method of manufacturing the same |
| CN203444813U (en) * | 2013-07-16 | 2014-02-19 | 江苏亨通线缆科技有限公司 | Starlike distributed cable |
| CN203673846U (en) * | 2013-12-10 | 2014-06-25 | 深圳市奔达康电缆股份有限公司 | Cable containing precision metal wires and plastic material which can become ceramic in burning |
-
2014
- 2014-12-10 CN CN201610192723.5A patent/CN105702364A/en active Pending
- 2014-12-10 CN CN201610192674.5A patent/CN105609206A/en active Pending
- 2014-12-10 CN CN201410753924.9A patent/CN104392788A/en active Pending
- 2014-12-10 CN CN201610188578.3A patent/CN105609205A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201117323Y (en) * | 2007-08-29 | 2008-09-17 | 王世祥 | Anti-theft cable |
| CN101989470A (en) * | 2009-08-06 | 2011-03-23 | 广东科能通用电气有限公司 | Anti-theft cable |
| CN201868142U (en) * | 2010-10-20 | 2011-06-15 | 申祥龙 | Burglar alarm power cable |
| US20120105230A1 (en) * | 2010-10-27 | 2012-05-03 | Thomas Bockstoce | Anti-theft sensor system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105702364A (en) | 2016-06-22 |
| CN105609205A (en) | 2016-05-25 |
| CN105609206A (en) | 2016-05-25 |
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Application publication date: 20150304 |