CN104376913B - High voltage power cable - Google Patents
High voltage power cable Download PDFInfo
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- CN104376913B CN104376913B CN201410736988.8A CN201410736988A CN104376913B CN 104376913 B CN104376913 B CN 104376913B CN 201410736988 A CN201410736988 A CN 201410736988A CN 104376913 B CN104376913 B CN 104376913B
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- 239000011241 protective layer Substances 0.000 claims abstract description 26
- 239000010410 layer Substances 0.000 claims abstract description 25
- 230000004888 barrier function Effects 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 7
- 230000005611 electricity Effects 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000700159 Rattus Species 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000034994 death Effects 0.000 description 1
- 231100000517 death Toxicity 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 230000000246 remedial effect Effects 0.000 description 1
Landscapes
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a kind of high voltage power cable, comprise core, insulating barrier, screen layer, protective layer; Insulating barrier is arranged at the outside of core, and screen layer is arranged at the outside of insulating barrier, and protective layer is arranged at the outside of screen layer; It is characterized in that, also comprise the first wire, the second wire, privates; Described the first wire, the second wire, privates are tangent between two; Described the first wire, the second wire, privates are arranged in protective layer; Described the first 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 source, the second dc source; High voltage power cable provided by the invention, when the place that just can immediately know theft that time that robber steals power cable overcoat, has effectively protected the safety of transmission line of electricity.
Description
Technical field
The present invention relates to a kind of high voltage power cable, belong to high voltage power transmission technical field.
Background technology
Along with the fast development of national economy, as consumption and the use model of the aortal power cable of national economyEnclose increasing. Power cable is the cable for transmitting and distribute electric energy. Be usually used in Urban Underground electrical network, send outThe lead line in power station, the in-line power of industrial and mining enterprises and cross river, the submarine transmission line in sea excessively. At power circuitIn, the shared proportion of power cable increases just gradually. Power cable be in the basic routing line of power system in order toThe cable product of transmission and distribution high-power power, comprising 1-500KV and above various 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 parts.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 isTo between core and the earth and out of phase core, on electric, be isolated from each other, ensure power delivery, is electric power electricityIndispensable part in cable structure. Screen layer, because the current ratio that electric power cable passes through is larger, electric currentCan produce magnetic field around, in order not affect other element, so add screen layer can this electromagnetic-field-shieldedIn cable. The effect of protective layer is the intrusion that protection power cable is avoided introduced contaminants and moisture, and outside preventingPower is directly damaged power cable.
Power cable can be divided into core and overcoat structure, and (overcoat refers to insulating barrier, screen layer and protectionLayer) two large divisions, be positioned at the core of innermost layer for electric energy transmitting, the overcoat being rolled in outside core has multilayerStructure, realizes respectively the functions such as shielding, insulation, anti-outside destroy. At high pressure and above defeated, power distribution network, byHigher in voltage, theft live electric cable often can cause thief's injures and deaths, and therefore, robber steals power circuit nowNot the copper material that aims at wire, occurred in this year the stolen thing of a lot of 10kV power cable overcoatPart. Because cable laying is hidden, and the anti-system of prison is not set, does not cause power failure therefore cable protective layer is stolenAnd short circuit accident be difficult for be found, but left very large potential safety hazard. After some cable protective layers are stolen,Although temporarily do not occur to have a power failure or personnel casualty accidents, cable insulation degree of protection declines to a great extent, and operatesVoltage, lightning surge, harmonic wave overvoltage, personnel trample, damaged by rats, all will trigger short circuit, a certain phase short circuitBlast, often causes many feeder lines short circuit simultaneously of laying in one ditch, causes large-area power-cuts, as can be seen here,Robber has buried the serious potential safety hazard in many places to power system. Because the cable of many overcoats after stolen buriesEnsconce undergroundly, power department does not have the security situation of special monitoring of equipment cable so far, cannot learn electric power electricityThe overcoat of cable is destroyed, thereby can not adopt remedial measures in time, makes power system and periphery personnel and environmentSafety be subject to serious threat.
By above description, can find just can stand in theft power cable overcoat for robberThe place of finding and navigate to theft quarter is the problem that is worth very much research.
Summary of the invention
The technical problem to be solved in the present invention is: when robber steals the overcoat of high voltage power cable, be difficult to be sent outExisting, leave very large potential safety hazard to transmission line of electricity, can't steal high voltage power cable robber at present anti-When sheath, just find at once theft place.
Solve above technical problem in order to realize, the technical solution adopted in the present invention is: high voltage power cable,Comprise core, insulating barrier, screen layer, protective layer; Insulating barrier is arranged at the outside of core, and screen layer is arranged atThe outside of insulating barrier, protective layer is arranged at the outside of screen layer;
Also comprise the first wire, the second wire, privates; Described the first wire, the second wire, the 3rdThe outer surface of wire is tangent between two; Described the first wire, the second wire, privates are embedded in protective layer;Described the first wire, the second wire, privates are parallel with core respectively;
The first wire, the second wire and privates are outside equipped with insulating barrier;
Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit,Three AD unit, controller, display unit, alarm unit, the first dc source, the second dc source;
The left end of the first described wire is electrically connected one end of the first resistance, the other end of the first resistance electrical connection theThe positive terminals of one dc source, the negative terminals of the first dc source are electrically connected one end of the second resistance, secondThe other end of resistance is electrically connected the left end of the second wire;
The negative terminals of the first dc source are electrically connected the positive terminals of the second dc source simultaneously; The second direct currentOne end of negative terminals electrical connection the 3rd resistance in source, a left side for the other end electrical connection privates of the 3rd resistanceEnd;
The right-hand member of described the first wire, the second wire, privates does not contact each other, and all arrangesThere is 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 equates.
Further, the resistance of the first described resistance, the second resistance and the 3rd resistance is 1 ohm.
Further, the external diameter of described the first wire, the second wire and privates equates, and insulating layer thicknessDegree 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 source equates with the voltage of the second dc source, thereby is convenient to analysis meterCalculate theft point.
Further, described controller adopts AT89S52 chip microcontroller.
Further, described display unit adopts LCD1864 display screen, the theft that controller is calculated pointShow.
Further, described alarm unit adopts buzzer warning. Can there is robber to exist by sound prompting like thisTheft power cable.
Further, a described AD unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809Chip.
Compared with prior art, the invention has the advantages that: high voltage power cable provided by the invention, work as robberThe place that just can immediately know theft that time of theft power cable overcoat, has effectively protected power transmission lineThe safety on road; Meanwhile, because robber wants to steal core, must first destroy protective layer, so of the present inventionPower cable has also effectively prevented that robber from stealing power cable core.
Brief description of the drawings
Fig. 1 is the structural representation of existing high voltage power cable.
Wherein, the 1st, core; The 2nd, insulating barrier; The 3rd, screen layer; The 4th, protective layer.
Fig. 2 is three tangent schematic diagrames of wire in protective layer.
Wherein, 5 is first wires; 6 is second wires; The 7th, privates; The 8th, protective layer.
Fig. 3 is the theft point Real-Time Monitoring circuit theory schematic diagram the present invention relates to.
Detailed description of the invention
Below in conjunction with accompanying drawing, invention is described in further detail.
With reference to Fig. 1,2,3, high voltage power cable, comprises core,, insulating barrier, screen layer, protective layer; AbsolutelyEdge layer is arranged at the outside of core, and screen layer is arranged at the outside of insulating barrier, protective layer be arranged at screen layer outsidePortion;
Also comprise the first wire, the second wire, privates; Described the first wire, the second wire, the 3rdThe outer surface of wire is tangent between two; Described the first wire, the second wire, privates are embedded in protective layer;Described the first wire, the second wire, privates are parallel with core respectively;
The first wire, the second wire and privates are outside equipped with insulating barrier;
Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit,Three AD unit, controller, display unit, alarm unit, the first dc source, the second dc source; InstituteThe left end of the first wire of stating is electrically connected one end of the first resistance, and the other end of the first resistance is electrically connected the first direct currentThe positive terminals of power supply, the negative terminals of the first dc source are electrically connected one end of the second resistance, the second resistanceThe other end is electrically connected the left end of the second wire; The negative terminals of the first dc source are electrically connected the second direct current simultaneouslyThe positive terminals in source; One end of negative terminals electrical connection the 3rd resistance of the second dc source, the 3rd resistance anotherThe left end of one end electrical connection privates; The right-hand member of described the first wire, the second wire, privates is mutualBetween do not contact, and be provided with insulation protective jacket; The one AD unit is by the voltage letter at the first resistance two endsNumber be input to controller; The voltage signal at the second resistance two ends is input to controller by the 2nd AD unit; The 3rdThe voltage signal at the 3rd resistance two ends is input to controller by AD unit; The input of display unit and controllerDisplay output port be connected; The alarm signal output ends mouth phase of the input of alarm unit and controllerConnect.
Wherein, described controller adopts AT89S52 chip microcontroller. Described display unit adopts LCD1864Display screen, described alarm unit adopts buzzer warning, can have robber in theft by sound prompting like thisPower cable, and the theft place of calculating is shown by LCD1864 display screen. DescribedOne AD unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809 chip.
Wherein, the external diameter of described the first wire, the second wire and privates is 3cm, wherein wireThickness of insulating layer be 1mm.
In the present embodiment, the length of power cable is 2000 meters, the first wire so, and the second wire, the 3rd leadsThe length of line is also just respectively 2000 meters, the first wire, and the second wire, the resistance of privates is respectively 10Ohm, the voltage of the first dc source and the second dc source is all selected 30V, the first resistance, the second resistance,The 3rd resistance is 1 ohm, thereby has guaranteed the first resistance, the second resistance, and the voltage at the 3rd resistance two ends is notCan exceed 5V, AD unit could normal work like this.
The present invention can realize the principle of theft point Real-Time Monitoring: no matter robber steals the core of power cable,Still the overcoat (overcoat comprises insulating barrier, screen layer and protective layer) of stealing power cable, so all needsWill first destroy protective layer, because protective layer is durable, generally be not easy to destroy, therefore robber must adopt goldBelong to shear and cut off protective layer, and protective layer the inside is provided with the first wire, the second wire, privates, byIn the first wire, the second wire, the external diameter of privates between two insulating barrier tangent and wire is all very thin,In the time adopting scissors to cut off protective layer, be bound to the first wire, the second wire, privates is also cut off,Exactly at scissors by the first wire, the second wire, privates is cut off at that moment, the first wire, secondWire, the conductor dbus of privates inside is crossed metal shear and is connected to one, at least has leading of two wiresKnow from experience and be electrically connected by metal shear, also the conductor of three wires of possibility all can pass through metal shear electricityCouple together.
At this time, the circuit in the present invention has just formed closed-loop path, is likely that the first wire and second is ledLine forms closed-loop path, is likely also that the second wire and privates form closed-loop path, also likely simultaneouslyForm two closed-loop paths. Once controller detects the first resistance, there is electricity at the second resistance or the 3rd resistance two endsPress and just can judge have robber stealing power cable.
If just the first wire and the second wire have formed closed-loop path;
First, the voltage by the first resistance two ends, divided by the resistance of the first resistance, obtains the electric current of closed-loop path;
Secondly, the voltage of the first dc source, divided by the electric current of closed-loop path, has calculated total electricity of closed-loop pathResistance, all-in resistance deducts the resistance of the first resistance and the second resistance, obtains total electricity of the first wire and the second wireResistance;
Finally, by formula R=ρ L/S, thereby calculate theft place. (ρ and S are known parameters).
Claims (10)
1. high voltage power cable, comprises core, insulating barrier, screen layer, protective layer; Insulating barrier is arranged at lineThe outside of core, screen layer is arranged at the outside of insulating barrier, and protective layer is arranged at the outside of screen layer; Its feature existsIn, also comprise the first wire, the second wire, privates; Described the first wire, the second wire, the 3rdThe outer surface of wire is tangent between two; Described the first wire, the second wire, privates are embedded in protective layer;Described the first wire, the second wire, privates are parallel with core respectively;
The first wire, the second wire and privates are outside equipped with insulating barrier;
Also comprise the first resistance, the second resistance, the 3rd resistance, an AD unit, the 2nd AD unit,Three AD unit, controller, display unit, alarm unit, the first dc source, the second dc source;
The left end of the first described wire is electrically connected one end of the first resistance, the other end of the first resistance electrical connection theThe positive terminals of one dc source, the negative terminals of the first dc source are electrically connected one end of the second resistance, secondThe other end of resistance is electrically connected the left end of the second wire;
The negative terminals of the first dc source are electrically connected the positive terminals of the second dc source simultaneously; The second direct currentOne end of negative terminals electrical connection the 3rd resistance in source, a left side for the other end electrical connection privates of the 3rd resistanceEnd;
The right-hand member of described the first wire, the second wire, privates does not contact each other, and all arrangesThere is 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 cable according to claim 1, is characterized in that, described the first resistance,The resistance of the second resistance and the 3rd resistance equates.
3. high voltage power cable according to claim 2, is characterized in that, described the first resistance,The resistance of the second resistance and the 3rd resistance is 1 ohm.
4. high voltage power cable according to claim 1, is characterized in that, described the first wire,The external diameter of the second wire and privates equates, and thickness of insulating layer is all less than 3mm.
5. high voltage power cable according to claim 4, is characterized in that, described the first wire,The thickness of insulating layer of the second wire and privates is 1mm.
6. high voltage power cable according to claim 1, is characterized in that, the first described direct currentSource equates with the voltage of the second dc source.
7. high voltage power cable according to claim 1, is characterized in that, described controller adoptsAT89S52 chip microcontroller.
8. high voltage power cable according to claim 1, is characterized in that, described display unit is adoptedUse LCD1864 display screen.
9. high voltage power cable according to claim 1, is characterized in that, described alarm unit is adoptedUse buzzer warning.
10. high voltage power cable according to claim 1, is characterized in that, a described AD is mono-Unit, the 2nd AD unit, the 3rd AD unit all adopt ADC0809 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736988.8A CN104376913B (en) | 2014-12-05 | 2014-12-05 | High voltage power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410736988.8A CN104376913B (en) | 2014-12-05 | 2014-12-05 | High voltage power cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104376913A CN104376913A (en) | 2015-02-25 |
| CN104376913B true CN104376913B (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410736988.8A Active CN104376913B (en) | 2014-12-05 | 2014-12-05 | High voltage power cable |
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| Country | Link |
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| CN (1) | CN104376913B (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105590698A (en) * | 2014-12-10 | 2016-05-18 | 袁娟 | High voltage power transmission power cable |
| CN104637624A (en) * | 2015-03-09 | 2015-05-20 | 江苏省电力公司东台市供电公司 | 35KV high-voltage transmission power cable |
| CN104616821A (en) * | 2015-03-09 | 2015-05-13 | 国家电网公司 | Anti-theft high-voltage power transmission power cable |
| CN104658683A (en) * | 2015-03-09 | 2015-05-27 | 江苏省电力公司盐城供电公司 | Power cable for high voltage transmission |
| CN105761832A (en) * | 2015-04-30 | 2016-07-13 | 梁龙 | 15KV anti-theft high voltage transmission power cable used for power supply system |
| CN104766671B (en) * | 2015-04-30 | 2017-03-08 | 江苏省电力公司盐城供电公司 | Power system anti-theft high-voltage is transmitted electricity power cable |
| CN105761831A (en) * | 2015-04-30 | 2016-07-13 | 梁龙 | 15KV anti-theft high voltage transmission power cable used for power supply system |
| CN106816210A (en) * | 2016-12-05 | 2017-06-09 | 国网江苏省电力公司盐城供电公司 | A kind of power cable |
Citations (3)
| 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 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8378822B2 (en) * | 2009-06-26 | 2013-02-19 | Melvin Price | Cable theft monitoring system |
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2014
- 2014-12-05 CN CN201410736988.8A patent/CN104376913B/en active Active
Patent Citations (3)
| 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 |
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| CN104376913A (en) | 2015-02-25 |
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