CN105655030A - High-voltage transmission power cable - Google Patents
High-voltage transmission power cable Download PDFInfo
- Publication number
- CN105655030A CN105655030A CN201610165227.0A CN201610165227A CN105655030A CN 105655030 A CN105655030 A CN 105655030A CN 201610165227 A CN201610165227 A CN 201610165227A CN 105655030 A CN105655030 A CN 105655030A
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- Prior art keywords
- resistance
- wire
- privates
- unit
- source
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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
- 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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- 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
- H01B7/32—Insulated conductors or cables characterised by their form with arrangements for indicating defects, e.g. breaks or leaks
-
- 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
-
- 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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Burglar Alarm Systems (AREA)
Abstract
The invention discloses a high-voltage transmission power cable which comprises four cable cores, and cross sections of three cable cores just form a circular ring; the cross section of the remaining cable core is round; the cable core with the cross section being round is located in a cavity formed by the other three cable cores; the outside of the cable core with the cross section being round is sequentially provided with an insulating layer and a shielding layer from inside to outside; the outer surfaces of the three cable cores with the cross sections just forming the circular ring are provided with insulating layers respectively; the outsides of the three cable cores with the cross sections forming the circular ring are sequentially provided with a waterproof layer and a protection layer from inside to outside; the high-voltage transmission power cable further comprises a first wire, a second wire and a third wire; the external diameters of every two of the wires are tangent to each other; the first wire, the second wire and the third wire are arranged in the protection layer; the first wire, the second wire and the third wire are parallel to the cable cores respectively. By means of the high-voltage transmission power cable, the theft place can be known immediately at the moment when a thief steals the protection layer of the power cable.
Description
The application is to be that December 10, application number in 2014 are 201410755810.8, invent the applying dateName is called the divisional application of the patent application of " high voltage power transmission power cable ".
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 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.
The very low comparison that causes power cable to do of space availability ratio between existing power cable core and coreSlightly.
Summary of the invention
The technical problem to be solved in the present invention is: the first, and robber steals the overcoat of high voltage power transmission power cableIn time, is difficult to be found, and has left very large potential safety hazard to transmission line of electricity, can't steal high pressure robber at presentWhen transmission of electricity power cable overcoat, just find at once theft place. The second, existing power cable core withSpace availability ratio between core is very low cause that power cable does thicker.
Solve above technical problem in order to realize, the technical solution adopted in the present invention is: high voltage power transmission electric powerCable, comprises four cores; The wherein cross section of a three cores annulus of composition just; Another root core cutsFace is circular; The rounded core in cross section is positioned at the inside cavity of other three cores composition; Cross section is roundedThe outside of core sets gradually insulating barrier, screen layer from inside to outside;
The cross section just outer surface of three cores of an annulus of composition is provided with insulating barrier; Cross section forms justThe outside of three cores of an annulus sets gradually water blocking layer, protective layer from inside to outside;
Also comprise the first wire, the second wire, privates; Described the first wire, the second wire, the 3rdThe external diameter of wire is 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,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 transmission power cable provided by the invention, whenRobber steals the place that just can immediately know theft that time of power cable overcoat, has effectively protected defeatedThe safety of electric line; Meanwhile, because robber wants to steal core, must first destroy protective layer, so thisBright power cable has also effectively prevented that robber from stealing power cable core, and in the time not yet forming closed-loop pathDo not consume electric energy. Meanwhile, the space availability ratio between power cable core of the present invention and core is very high, electric powerIt is thinner that cable does.
Brief description of the drawings
Fig. 1 is the structural representation of high voltage power transmission power cable of the present invention.
Wherein, the 1st, core; The 2nd, insulating barrier; The 3rd, screen layer; The 4th, protective layer; The 9th, water blocking 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 transmission power cable, comprises four cores; Wherein cutting of three coresFace is an annulus of composition just; Another root core cross section is circular; The rounded core in cross section is positioned at other threeThe inside cavity of core composition; The outside of the rounded core in cross section sets gradually insulating barrier, shielding from inside to outsideLayer; The cross section just outer surface of three cores of an annulus of composition is provided with insulating barrier;
The cross section just outside of three cores of an annulus of composition sets gradually water blocking layer, protective layer from inside to outside;
Also comprise the first wire, the second wire, privates; Described the first wire, the second wire, privatesExternal diameter tangent between two; Described the first wire, the second wire, privates are arranged in protective layer; DescribedThe first wire, the second wire, privates 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; The left end of the first described wire is electrically connected the first electricityOne end of resistance, the other end of the first resistance is electrically connected the positive terminals of the first dc source, the first dc sourceNegative terminals 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; TheThe negative terminals of one dc source are electrically connected the positive terminals of the second dc source simultaneously; Bearing of the second dc sourceOne end of terminals electrical connection the 3rd resistance, the left end of the other end electrical connection privates of the 3rd resistance; DescribedThe first wire, the second wire, the right-hand member of privates do not contact each other, and be provided with insulation and protectSheath; The voltage signal at the first resistance two ends is input to controller by the one AD unit; The 2nd AD unit willThe voltage signal at the second resistance two ends is input to controller; The 3rd AD unit is by the voltage letter at the 3rd resistance two endsNumber be input to controller; The input of display unit is connected with the display output port of controller; Report to the police singleThe input of unit is connected with the alarm signal output ends mouth of controller.
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 (3)
1. high voltage power transmission power cable, is characterized in that, comprises four cores; The wherein cross section of three coresJust an annulus of composition; Another root core cross section is circular; The rounded core in cross section is positioned at other three linesThe inside cavity of core composition; The outside of the rounded core in cross section sets gradually insulating barrier, screen layer from inside to outside;
The cross section just outer surface of three cores of an annulus of composition is provided with insulating barrier;
The cross section just outside of three cores of an annulus of composition sets gradually water blocking layer, protection from inside to outsideLayer;
Also comprise the first wire, the second wire, privates; Described the first wire, the second wire, the 3rdThe external diameter of wire is 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,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.
The resistance of described the first resistance, the second resistance and the 3rd resistance equates; Described the first resistance, secondThe resistance of resistance and the 3rd resistance is 1 ohm;
The external diameter of described the first wire, the second wire and privates equates for 3cm, and described first leadsThe thickness of insulating layer of line, the second wire and privates is 1mm;
The first described dc source equates with the voltage of the second dc source, is 30V;
Described controller adopts AT89S52 chip microcontroller; Described display unit adopts LCD1864 to showScreen; Described alarm unit adopts buzzer warning.
2. high voltage power transmission power cable according to claim 1, is characterized in that, the length of power cableDegree is 2000 meters, the first wire, and the second wire, the length of privates is also just respectively 2000 meters, and firstWire, the second wire, the resistance of privates is respectively 10 ohm, the first resistance, the second resistance, the 3rdResistance is 1 ohm, thereby has guaranteed the first resistance, the second resistance, and the voltage at the 3rd resistance two ends can not surpassCross 5V, AD unit could normal work like this.
3. high voltage power transmission power cable according to claim 1, is characterized in that, when just first leadingLine 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; Wherein, ρ and S are knownParameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165227.0A CN105655030A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610165227.0A CN105655030A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410755810.8A Division CN104464934B (en) | 2014-12-10 | 2014-12-10 | High voltage power transmission power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105655030A true CN105655030A (en) | 2016-06-08 |
Family
ID=56495309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610165227.0A Pending CN105655030A (en) | 2014-12-10 | 2014-12-10 | High-voltage transmission power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105655030A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258525Y (en) * | 1994-09-30 | 1997-07-30 | 吕杰 | Alarm rope lock |
| CN2277554Y (en) * | 1996-12-30 | 1998-04-01 | 上海摩恩电气有限公司 | Five-core power cable |
| CN101989470A (en) * | 2009-08-06 | 2011-03-23 | 广东科能通用电气有限公司 | Anti-theft cable |
| US20120105230A1 (en) * | 2010-10-27 | 2012-05-03 | Thomas Bockstoce | Anti-theft sensor system |
| CN103021543A (en) * | 2011-09-28 | 2013-04-03 | 茅凯 | Alarming cable |
-
2014
- 2014-12-10 CN CN201610165227.0A patent/CN105655030A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2258525Y (en) * | 1994-09-30 | 1997-07-30 | 吕杰 | Alarm rope lock |
| CN2277554Y (en) * | 1996-12-30 | 1998-04-01 | 上海摩恩电气有限公司 | Five-core power cable |
| CN101989470A (en) * | 2009-08-06 | 2011-03-23 | 广东科能通用电气有限公司 | Anti-theft cable |
| US20120105230A1 (en) * | 2010-10-27 | 2012-05-03 | Thomas Bockstoce | Anti-theft sensor system |
| CN103021543A (en) * | 2011-09-28 | 2013-04-03 | 茅凯 | Alarming cable |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160608 |
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