CN204516451U - High voltage power transmission power cable - Google Patents
High voltage power transmission power cable Download PDFInfo
- Publication number
- CN204516451U CN204516451U CN201520132609.4U CN201520132609U CN204516451U CN 204516451 U CN204516451 U CN 204516451U CN 201520132609 U CN201520132609 U CN 201520132609U CN 204516451 U CN204516451 U CN 204516451U
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- wire
- resistance
- power cable
- high voltage
- power transmission
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 23
- 239000011241 protective layer Substances 0.000 claims abstract description 22
- 230000004888 barrier function Effects 0.000 claims abstract description 17
- 238000009413 insulation Methods 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012544 monitoring process 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
- 239000004020 conductor Substances 0.000 description 1
- 238000010276 construction Methods 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
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010410 layer Substances 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
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Abstract
The utility model discloses a kind of high voltage power transmission power cable, comprise three cores, insulating barrier, screen, protective layers; Three cores are tangent between two, and every root core outside all arranges insulating barrier; The outside of three cores sets gradually insulating barrier, screen, protective layer; Also comprise the first wire, the second wire, DC power supply, current detecting unit, controller unit, display unit; First wire and the second wire are arranged at protective layer inside; First wire, the second wire are identical with the length of core; The high voltage power transmission power cable that the utility model provides, when the place just immediately can knowing theft that time that robber steals power cable overcoat, effectively protects the safety of transmission line.
Description
Technical field
The utility model relates to a kind of high voltage power transmission power cable, belongs to high voltage power transmission technical field.
Background technology
Wires and cables industry is the second largest industry that China is only second to automobile industry, and product variety Service Efficiency and domestic market occupation rate are all more than 90%.Worldwide, the Chinese electric wire gross output value exceedes the U.S., becomes first electric wire producing country in the world.Along with Chinese wires and cables industry high speed development, creation of new enterprise quantity constantly rises, and industry overall technology level is largely increased.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 with distribute the cable product of high-power power in the basic routing line of electric power system, comprising the power cable of 1-500KV and the various insulation of above various electric pressure.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 causes 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.
Summary of the invention
The technical problems to be solved in the utility model is: be difficult to be found when stealing the overcoat of high voltage power transmission power cable for current robber, 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.
In order to realize solving above technical problem, the technical scheme that the utility model adopts is: high voltage power transmission power cable, comprises three cores, insulating barrier, screen, protective layers; Three cores are tangent between two, and every root core outside all arranges insulating barrier; The outside of three cores sets gradually insulating barrier, screen, protective layer; Also comprise the first wire, the second wire, DC power supply, current detecting unit, controller unit, display unit;
The first described wire and the second wire are arranged at protective layer inside; First wire, the second wire are identical with the length of core;
One end of one end electrical connection current detecting unit of the first wire, one end of the other end electrical connection DC power supply of current detecting unit, the other end of DC power supply is electrically connected one end of the second wire;
The current signal of current detecting unit is input to controller unit, and controller unit is electrically connected with display unit;
The resistance of equidistant N number of similar resistance in parallel between first wire with the second wire;
Wherein, N number of resistance called after the 1st resistance successively from left to right, the 2nd resistance, the i-th resistance, N resistance; 1≤i≤N;
1st resistance and N resistance lay respectively at the both ends of core; Distance between adjacent resistor is equal.
Further, the voltage of described DC power supply is 25V.
Further, described controller unit adopts AT89S51 single-chip microcomputer.
Further, the distance between adjacent resistor is less than 200 meters.
Further, described current detecting unit is the DC ammeter with current signal output end mouth.
Compared with prior art, the utility model has the advantage of: the high voltage power transmission power cable that the utility model provides, 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 protective layer must be destroyed, so power cable of the present utility model also effectively prevent robber steal power cable core.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model high voltage power transmission power cable.
Fig. 2 is the schematic diagram of the protective layer part of the utility model power cable.
Fig. 3 is the utility model theft point observation circuit principle schematic.
Wherein, 1 is core, and 2 is insulating barriers, and 3 is screens, and 4 is protective layers, and 5 is protective layers, and 6 is wires.
Embodiment
Below in conjunction with accompanying drawing, utility model 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; Three cores are tangent between two, and every root core outside all arranges insulating barrier; The outside of three cores sets gradually insulating barrier, screen, protective layer; Also comprise the first wire, the second wire, DC power supply, current detecting unit, controller unit, display unit; First wire and the second wire are arranged at protective layer inside; First wire, the second wire are identical with the length of core; One end of one end electrical connection current detecting unit of the first wire, one end of the other end electrical connection DC power supply of current detecting unit, the other end of DC power supply is electrically connected one end of the second wire; The current signal of current detecting unit is input to controller unit, and controller unit is electrically connected with display unit; Suppose the total length 1900 meters of power cable, the resistance of equidistant 20 similar resistance in parallel between the first wire with the second wire;
Wherein, 20 resistance called after the 1st resistance successively from left to right, the 2nd resistance, the i-th resistance, the 20th resistance; 1≤i≤20;
1st resistance and the 20th resistance lay respectively at the both ends of core; Distance between adjacent resistor is equal is all 100 meters.The voltage of DC power supply is 25V, and resistance is 1000 ohm.Controller unit adopts AT89S51 single-chip microcomputer.Wherein, described current detecting unit is the DC ammeter with current signal output end mouth.
The principle that the utility model can realize stealing some monitoring illustrates: no matter robber steals the core of power cable; or the overcoat (overcoat comprises insulating barrier, screen and protective layer) of theft power cable; so all need first to destroy protective layer, destruction first wire and the second wire once destruction protective layer is bound to.When the first wire and the second wire are not yet destroyed, the current value that current detecting unit detects should be: I=U/R=25V ÷ 50=0.5A (the resistor coupled in parallel resistance of 20 1000 ohm is 50 ohm).Suppose that the place that robber steals calculates the 950th meter from left end, 950 ÷ 100=9.5, namely between the 10th resistance and the 11st resistance, so now 10 resistance of only remaining parallel connection in circuit, the current value that now current detecting unit detects should be: I=U/R=25V ÷ 100=0.25A (the resistor coupled in parallel resistance of 10 1000 ohm is 100 ohm).Now, concrete current value and theft place corresponding to this current value can be inputed to display unit by controller, and display unit display theft place is between the 10th resistance and the 11st resistance.For the ease of understand be first suppose to be aware of concrete theft point herein, when not knowing theft point conversely, the resistance number be parallel in circuit can be calculated according to current value, owing to being all the equally spaced approximate location that can calculate theft point again according to resistance number between resistance, error is within 100 meters.
Claims (5)
1. high voltage power transmission power cable, comprises three cores, insulating barrier, screen, protective layers; Three cores are tangent between two, and every root core outside all arranges insulating barrier; The outside of three cores sets gradually insulating barrier, screen, protective layer; It is characterized in that, also comprise the first wire, the second wire, DC power supply, current detecting unit, controller unit, display unit;
The first described wire and the second wire are arranged at protective layer inside; First wire, the second wire are identical with the length of core;
One end of one end electrical connection current detecting unit of the first wire, one end of the other end electrical connection DC power supply of current detecting unit, the other end of DC power supply is electrically connected one end of the second wire;
The current signal of current detecting unit is input to controller unit, and controller unit is electrically connected with display unit;
The resistance of equidistant N number of similar resistance in parallel between first wire with the second wire;
Wherein, N number of resistance called after the 1st resistance successively from left to right, the 2nd resistance, the i-th resistance, N resistance; 1≤i≤N;
1st resistance and N resistance lay respectively at the both ends of core; Distance between adjacent resistor is equal.
2. high voltage power transmission power cable according to claim 1, is characterized in that, the voltage of described DC power supply is 25V.
3. high voltage power transmission power cable according to claim 1, is characterized in that, described controller unit adopts AT89S51 single-chip microcomputer.
4. high voltage power transmission power cable according to claim 1, is characterized in that, the distance between adjacent resistor is less than 200 meters.
5. high voltage power transmission power cable according to claim 1, is characterized in that, described current detecting unit is the DC ammeter with current signal output end mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132609.4U CN204516451U (en) | 2015-03-09 | 2015-03-09 | High voltage power transmission power cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132609.4U CN204516451U (en) | 2015-03-09 | 2015-03-09 | High voltage power transmission power cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204516451U true CN204516451U (en) | 2015-07-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520132609.4U Expired - Fee Related CN204516451U (en) | 2015-03-09 | 2015-03-09 | High voltage power transmission power cable |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204516451U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
2015
- 2015-03-09 CN CN201520132609.4U patent/CN204516451U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150729 Termination date: 20160309 |