CN109935389A - A kind of three-phase multicore parallel current-sharing construction of cable - Google Patents
A kind of three-phase multicore parallel current-sharing construction of cable Download PDFInfo
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- CN109935389A CN109935389A CN201711350684.8A CN201711350684A CN109935389A CN 109935389 A CN109935389 A CN 109935389A CN 201711350684 A CN201711350684 A CN 201711350684A CN 109935389 A CN109935389 A CN 109935389A
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- 238000010276 construction Methods 0.000 title claims abstract description 19
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
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Abstract
A kind of three-phase multicore parallel current-sharing construction of cable; the protective layer outside the main body charge transport layer and main body charge transport layer outside layer and centrally disposed support layer is held in the palm including center, which includes that the ring center support layer at least footprint of three groups of multicore power wire cores and every group of multicore power wire core of successively arranging is essentially equal；More wire cores are fully equivalent in spatial position in every group of main body charge transport layer；Multicore power wire core includes sequence setting power wire core A group, power wire core B group and power wire core C group, multicore power wire core is 3*N group, N is that the high current of positive integer conveys, unit section current-carrying capacity is high, temperature rise is low, the small equal distinguishing characteristics of heat consumption, electric current sideslip between which uses the fully equivalent arrangement of multinomial more radical spaces that it is made to effectively prevent same much simultaneously prevent part from overloading and cause the strong measure such as heat ageing, on fire, short-circuit；It effectively overcomes conventional parallel cable single overload caused by sideslip, short circuit, the ignitable defect of appearance in high current conveying.
Description
Technical field
The present invention relates to power cable technical field more particularly to a kind of three-phase multicore parallel current-sharing constructions of cable.
Background technique
With the development of society, electrified horizontal raising, electric power greatly increase.Currently, generally defeated using mesohigh
Electricity and high-voltage motor are arranged, bus or in parallel using three-phase multi-cable using copper aluminium.There is peace in certain this place in the above two
Full problem, cost issues, space problem and can not apply, such as between the transformer and main switch cabinet of power plant or integrated mill, open
It closes and waits high current powers conveying between cabinet and high-power equipment.Therefore, the latter answers extensively with Xiang Duogen head of large-section single conductor cable parallel connection
Equal high current powers conveying between for transformer and switchgear, for improving the conveying capacity in Integral cable circuit, reduction is built
Scale is built, optimization equipment arrangement improves transmission of electricity flexibility.
But this method there are the following problems: firstly, with multi-cable in phase because by the kindred effect between cable not
Equally cause cable AC electric resistance different；Secondly, the inductance love of every cable causes in same phase often to the influence of other cable inductances
The reactance of root cable is different.And the distribution with impedance for exchanging electric current in parallel circuit are inversely proportional, and because of impedance=AC resistance+j*
Reactance.Therefore, electric current is unable to mean allocation between this mode frequently results in cable, substantially reduces and understands the defeated of Integral cable circuit
Electric energy power, while being also easy to produce to produce unit cable and overload and causing short circuit.For this purpose, related scientific research mechanism is accordingly studied, and do
The suggestion of improvement property, such as: teacher is peaceful etc. " research to its current distribution is laid with mutually big section shunt cable " delivered；Chai Jinai
Etc. " research of current distribution between threephase cable parallel conductor " delivered.However, three-phase 2 inclined problems in parallel are solved only,
Three-phase 3 or more not can solve, only proposes to improve.In addition, above scheme has the alternate balance of three-phase, exist simultaneously
The problems such as laying space.Therefore, there are no the transformations that safe and efficient, economic means solves power plant or integrated mill so far
High current transportation problem between device and main switch cabinet, between switchgear and high-power equipment.
Summary of the invention
A kind of three-phase multicore parallel current-sharing cable is provided it is an object of the invention to overcome the deficiency of the above-mentioned prior art
Structure and preparation method, the present invention provide a kind of safe and efficient, economic three-phase multicore parallel current-sharing construction of cable.To solve
High current transportation problem between the transformer and main switch cabinet of power plant or integrated mill, between switchgear and high-power equipment.
To achieve the above object, the present invention provides:
A kind of three-phase multicore parallel current-sharing construction of cable comprising:
Center support layer, the main body charge transport layer outside centrally disposed support layer and the protective layer being arranged in outside main body charge transport layer；
The main body charge transport layer includes at least three groups of multicore power wire cores that ring center support layer is successively arranged, and multicore described in every group is dynamic
The footprint of line of force core is essentially equal；
More wire cores are fully equivalent in spatial position in every group of the main body charge transport layer；
The multicore power wire core includes sequence setting power wire core A group, power wire core B group and power wire core C group, the multicore
Power wire core is 3*N group, and the N is positive integer.
To realize technical effect optimization, further step is:
The center support layer includes centrally located neutral conductor and it extrudes rubber layer outside.
The inscribe diameter of a circle of the center support layer is D=d* [1/sin (360/n) -1], wherein d is the straight of power wire core
Diameter, n are power wire core total quantity.
The power wire core A, power wire core B and power wire core C are that the outer extruded insulation layer of conductor thread core is formed, described exhausted
The thickness of edge layer is more than or equal to conductor thread core radius.
The insulating materials of the insulating layer is rubber or modeling cable material.
The outer surface of the power wire core A, power wire core B and power wire core C are respectively entirely different color.
The footprint of multicore power wire core described in every group is that the layer external space is held in the palm at the center of one third.
The protective layer is to extrude high polymer sheath layer outside main body charge transport layer to be formed.
The protective layer is wrapped copper strips and to extrude high polymer sheath layer outside in band outside main body charge transport layer and formed.
A kind of three-phase multicore parallel current-sharing construction of cable of the present invention, holds in the palm outside layer and centrally disposed support layer including a center
Main body charge transport layer, and the protective layer being arranged in outside main body charge transport layer, the main body charge transport layer include that ring center support layer is successively arranged
At least three groups of multicore power wire cores, the footprint of multicore power wire core described in every group of cloth are essentially equal；The main body transmission of electricity
More wire cores are fully equivalent in spatial position in every group of layer；The multicore power wire core include sequence setting power wire core A group,
Power wire core B group and power wire core C group, the multicore power wire core are 3*N group, and the N is that the high current of positive integer conveys, single
Position section current-carrying capacity is high, and temperature rise is low, the small equal distinguishing characteristics of heat consumption, the distinguishing characteristics system simultaneously using multinomial more radical spaces completely etc.
Electric current sideslip between effect arrangement makes it effectively prevent same much prevents part from overloading and causes heat ageing, on fire, short-circuit etc. strong
Measure；It is ignitable that it effectively overcomes conventional parallel cable single overload, short circuit, appearance caused by sideslip in high current conveying
Defect.
The beneficial effects of the invention are as follows.
1, operation temperature rise is low, heat consumption is few, current-carrying is high: cable uses multicore parallel-connection structure, and every phase, which is divided into more, makes its surface
Increase, can efficiently use " kelvin effect ".Reduce the whole AC resistance of cable.To reach same cross-sectional, same load
The cable generates heat than traditional cable in the case of stream, and few, temperature rise is low.Increase the ability to transmit electricity of cable.Its effect is similar to segmentation and leads
Body, while than milliken conductor ratio: distance between conductors is bigger, and the thickness of cable insulation of the present invention is more than or equal to conductor thread core half
Diameter, make spacing be greater than conductor diameter, have more effectively reduce " kindred effect " and increase heat dissipation effect, both influence with electricity
Distance between cable core is proportional at 4 powers.In addition, reducing cables manufacturing difficulty.
2, anti-parallel line sideslip (unbalance loading), fever, short circuit cause fire: the multicore in cable is equivalent using spatial position
Arrangement, the multicore of the three-phase and every phase that make cable are equivalent in spatial position.Guarantee " kelvin effect ", " neighbouring effect that every core is subject to
Answer " and capacitive reactance effect it is equal, to guarantee that the impedance of every core is equal.It effectively prevent unbalance loading, fever, short circuit to cause fire.Can have
Effect solves: at present using every between conventional power plants or the transformer and main switch cabinet of integrated mill, between switchgear and high-power equipment
More single-core cable parallel connections are mutually used, because of fire caused by there is unbalance loading.Such as: " the same mutually big section electricity in parallel that teacher rather delivers
Cable lays research to its current distribution " described in power plant just cause fire because of unbalance loading, for another example: Hong Wang more parallel connections in Fujian are inclined
The cable of load is fired accident, etc..
3, safe and anti-external environment electromagnetic interference causes unbalance loading: cable uses copper strips or other metals to shield mode always to solve
Certainly external interference.Copper strips also serves as ground wire simultaneously, and thickness is reached the requirement of cable short circuit current by its section.
4, stable structure: cable is equipped with center and holds in the palm layer, and the diameter design of support layer inscribed circle is D=d* [1/sin (360/n)-
1].Then by the way of CAD drawing, the section of support layer is obtained.It is squeezed with the plasticity silica gel of equivalent or comparable rubber material
Packet neutral conductor, cable twisting molding (Thomas's saddle) make plasticity rubber become heat cured stabilization using heating vulcanization afterwards
Structure (can vulcanize) together with sheath.To guarantee the structural stability of cable, finally guarantee the space bit of each core of main charge transport layer
It sets equivalent.
The present invention is entirely appropriate between each industrial and mining enterprises, the transformer of power plant and main switch cabinet, switchgear with it is high-power
The conveying of the high current powers such as equipment room.
The present invention is described in further detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is the overall structure diagram of one embodiment of the invention.
Appended drawing reference:
Hold in the palm layer 10 in center；
Rubber layer 101；
Neutral conductor 102；
Main body charge transport layer 20；
Multicore power wire core 201；
Power wire core A2011；
Power wire core B2012；
Power wire core C2013；
Insulating layer 202；
Protective layer 30；
Copper strips 301；
High polymer sheath layer 302.
Specific embodiment
As shown in attached drawing, a kind of three-phase multicore parallel current-sharing construction of cable of the present invention is realized in.
A kind of theoretical foundation that the three-phase multicore parallel current-sharing construction of cable is implemented is the distribution of electric current in exchange parallel circuit
It is inversely proportional with impedance, impedance Z=R friendship+jX；Purpose is flowed to reach every core, it is necessary to assure every core AC resistance is equal with reactance.
Firstly, AC resistance is that core D.C. resistance adds kelvin effect to add kindred effect, i.e. RIt hands over=RDirectly(1+Ys+Yp).Direct current
Resistance is that conductor inherent characteristic is related to the material of cable conductor, section, length, and the control by manufacture craft is easily to reach very much
Unanimously.Kelvin effect is under communicational aspects, and current convergence is leading surface flow；Why in parallel using single-phase multicore this is also
One of the foundation of whole current-carrying capacity (there certainly exist the difficulty in cable production problems of super-section) is improved, so main explanation herein
Be how to guarantee that a few core kelvin effects are equal: Ys=XS 4/ (192+0.8Xs4);Xs2=8∏f*10-7Ks/R is straight, therefore, collects skin
Effect is directly influenced by frequency f, with D.C. resistance R, is guaranteed consistent also relatively easy.Kindred effect is that electric current is mutual between adjacent cable
The effect drawn: YP=[Xp4/(192+0.8Xp4)](dc/s)2[0.312(dc/s)2+1.18/Xp4+0.27]];Xp2=8∏f*10- 7ks/RDirectly.Therefore, kindred effect is related with the relative distance of other cores.So to guarantee that each core spatial position is equivalent in single-phase
It just can guarantee that effect is equal.
Secondly, it is the sum of outer Le sense of interior Li that the ∏ of reactance X=2 fL, L, which are total inductance,.Li=u0/8∏；Le=2ln(2S/Dc)*
10-7-2a2ln(2*10-7), wherein a=(- 1+j30.5)/2.Still related with the outer diameter of core and mutual distance.Similarly, total
Inductance is equal it is essential to ensure that the spatial position of all cores is equivalent in single-phase.
Again, the influence of external environment electromagnetism also needs to try to shield.
Finally, be exactly A, B, C three-phase equilibrium problem, such as " laying with mutually big section shunt cable to it of rather delivering of teacher
The research of current distribution " it is described, three-phase 2 single-phase equal flow problems in parallel be solve, but it uses parallel arrangement, so A,
B, the respective total impedance of C three-phase is not etc..Normal non-parallel circuit, which requires isosceles triangle to arrange, also just makes the spatial position of three-phase
It is equivalent.So being comprehensively solve problem, the gross space position of A, B, C three-phase also needs equivalent.
Referring to Fig.1, the present invention provides a kind of three-phase multicore parallel current-sharing construction of cable, comprising: asks layer 10, setting to exist in center
Main body charge transport layer 20 outside the support layer 10 of center and the protective layer 30 that is arranged in outside main body charge transport layer 20；The main body charge transport layer 20 wraps
Include three groups of multicore power wire cores 201 that ring center support layer 10 is successively arranged, the footprint of multicore power wire core 201 described in every group
It is essentially equal；The multicore power wire core 201 includes power wire core A2011, power wire core B2012 and the power line of sequence setting
Core C2013, the multicore power wire core 201 are 3*N group, and the N is positive integer.Main body charge transport layer 20 is by multicore power wire core
201 compositions, the multiple that the quantity of the multicore power wire core 201 is three, multicore power wire core 201 are enclosed by full symmetric mode
It is wound on center support layer 10 and arranges process and form, symmetric mode is that the multicore of three-phase and every phase is equivalent in spatial position.
In the above-described embodiments, wherein being framework with center support layer 10；The equal part of combining main body charge transport layer 20 is symmetrically arranged,
Keep every group of multicore power wire core 201 consistent by internal driving；Along with the shielding of protective layer 30 guarantees every core not by external electromagnetic
Field influences, and flows to reach.
In one embodiment, the center support layer 10 outside centrally located neutral conductor 102 and its including extruding
Rubber layer 101.The rubber layer 101 be extrude can deformation raw rubber constitute.
In one embodiment, the inscribe diameter of a circle of the center support layer 10 is D=d* [1/sin (360/n) -1],
In, d is the diameter of power wire core, and n is power wire core total quantity.Ask the section diameter of layer 10 defeated for the main body of individual event multicore in center
The 1/2 of 20 diameter of section of electric layer.
In one embodiment, the power wire core A2011, power wire core B2012 and power wire core C2013 are conductor
The outer extruded insulation layer 202 of core is formed, and the thickness of the insulating layer 202 is more than or equal to conductor thread core radius.
In one embodiment, the insulating materials of the insulating layer 202 is rubber or modeling cable material.
In one embodiment, the outer surface of the power wire core A2011, power wire core B2012 and power wire core C2013
Respectively entirely different color.
In one embodiment, the footprint of multicore power wire core 201 described in every group is that layer is held in the palm at the center of one third
10 external spaces.
In one embodiment, the protective layer 30 is that the formation of high polymer sheath layer 302 is extruded outside main body charge transport layer 20.
Specific protective layer 30 can be to be constituted by extruding high polymer sheath layer 302 outside wrapped copper strips 301, can effectively prevent in this way
The interference of external electromagnetic field, and mechanical protection is provided.
In the above-described embodiments, the equivalent therefore suffered electromagnetic field in every phase, the spatial position of each core is consistent；Outside
Adding metal screen layer effectively prevents the interference of external electromagnetic field；To which the total impedance of three-phase is consistent, while each core in every phase
Impedance it is equal, ensure that every core flows when load, prevents electric current sideslip, increase whole current-carrying capacity；Cover exempt from single mistake cut draw
Play the generation of the accidents such as fever, aging, fusing, short circuit, fire.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (9)
1. a kind of three-phase multicore parallel current-sharing construction of cable characterized by comprising
Center support layer, the main body charge transport layer outside centrally disposed support layer and the protective layer being arranged in outside main body charge transport layer；
The main body charge transport layer includes at least three groups of multicore power wire cores that ring center support layer is successively arranged, and multicore described in every group is dynamic
The footprint of line of force core is essentially equal；
More wire cores are fully equivalent in spatial position in every group of the main body charge transport layer；
The multicore power wire core includes sequence setting power wire core A group, power wire core B group and power wire core C group, the multicore
Power wire core is 3*N group, and the N is positive integer.
2. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that hold in the palm layer in the center
Including extruding rubber layer outside centrally located neutral conductor and its.
3. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that hold in the palm layer in the center
Inscribe diameter of a circle be D=d* [1/sin (360/n) -1], wherein d be power wire core diameter, n be power wire core sum
Amount.
4. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that the power wire core
A, power wire core B and power wire core C is that the outer extruded insulation layer of conductor thread core is formed, and the thickness of the insulating layer, which is more than or equal to, leads
Body core radius.
5. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 4, which is characterized in that the insulating layer
Insulating materials is rubber or modeling cable material.
6. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that the power wire core
A, the outer surface of power wire core B and power wire core C are respectively entirely different color.
7. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that multicore described in every group
The footprint of power wire core is that the layer external space is held in the palm at the center of one third.
8. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that the protective layer is
High polymer sheath layer is extruded outside main body charge transport layer to be formed.
9. a kind of three-phase multicore parallel current-sharing construction of cable according to claim 1, which is characterized in that the protective layer is
It wrapped copper strips and extrudes high polymer sheath layer outside in band outside main body charge transport layer and is formed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350684.8A CN109935389A (en) | 2017-12-15 | 2017-12-15 | A kind of three-phase multicore parallel current-sharing construction of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711350684.8A CN109935389A (en) | 2017-12-15 | 2017-12-15 | A kind of three-phase multicore parallel current-sharing construction of cable |
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| Publication Number | Publication Date |
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| CN109935389A true CN109935389A (en) | 2019-06-25 |
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ID=66980107
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20211326A1 (en) * | 2021-11-03 | 2023-05-04 | Aker Solutions As | An offshore high-voltage electric power transmission assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090218115A1 (en) * | 2006-06-14 | 2009-09-03 | Cfw Emv-Consulting Ag | High Current Cable |
| CN106448861A (en) * | 2016-10-08 | 2017-02-22 | 远东电缆有限公司 | Ultralow magnetic field cable |
| CN207731680U (en) * | 2017-12-15 | 2018-08-14 | 湖南华菱线缆股份有限公司 | A kind of three-phase multicore parallel current-sharing construction of cable |
-
2017
- 2017-12-15 CN CN201711350684.8A patent/CN109935389A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090218115A1 (en) * | 2006-06-14 | 2009-09-03 | Cfw Emv-Consulting Ag | High Current Cable |
| CN106448861A (en) * | 2016-10-08 | 2017-02-22 | 远东电缆有限公司 | Ultralow magnetic field cable |
| CN207731680U (en) * | 2017-12-15 | 2018-08-14 | 湖南华菱线缆股份有限公司 | A kind of three-phase multicore parallel current-sharing construction of cable |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NO20211326A1 (en) * | 2021-11-03 | 2023-05-04 | Aker Solutions As | An offshore high-voltage electric power transmission assembly |
| NO347660B1 (en) * | 2021-11-03 | 2024-02-12 | Aker Solutions Subsea As | An offshore high-voltage electric power transmission assembly |
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