CN209658875U - A kind of high-tension cable and deicing system - Google Patents
A kind of high-tension cable and deicing system Download PDFInfo
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- CN209658875U CN209658875U CN201920688818.5U CN201920688818U CN209658875U CN 209658875 U CN209658875 U CN 209658875U CN 201920688818 U CN201920688818 U CN 201920688818U CN 209658875 U CN209658875 U CN 209658875U
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Abstract
The utility model provides a kind of high-tension cable, belong to power cable technical field, including at least one cut cable, when the number of the cut cable is more than two, each cut cable head and the tail are sequentially connected, steel-cored aluminium strand is set in each cut cable, the steel-cored aluminium strand includes steel core and the aluminum stranded conductor layer that is set in outside the steel core, current-carrying heating layer is provided between the steel core and the aluminum stranded conductor layer, the current-carrying heating layer includes the siderochrome aluminum steel and aluminum stranded conductor for being staggered and surrounding tubular, and temperature-resistant insulation layer is coated with outside the siderochrome aluminum steel.The utility model provides a kind of deicing system.A kind of high-tension cable provided by the utility model and deicing system effectively reduce the probability that icing occurs for transmission line of electricity using high-tension cable provided by the utility model.
Description
Technical field
The utility model belongs to power cable technical field, is to be related to a kind of high-tension cable and deicing system more specifically
System.
Background technique
Powerline ice-covering seriously threatens the safe operation of electric power and communication network, and in the whole world, many countries cause weight
Major break down.Spring in 2005, Hubei and Hunan Provinces and Chongqing chief of a tribe sun area, continue a wide range of rain and snow weather, lead to transmission line of electricity large area icing,
Some electric power pylons can't bear the heavy load and tower, 17 power supply lines are at a standstill, influence to live and produce up to a wheat harvesting period, damage
Mistake is difficult to estimate.Ice damage at the beginning of 2008 national direct economic loss 1000 caused by causing electric power pylon to collapse because of transmission line icing
Yu Yiyuan.
Extra long distance conveying electricity will inevitably pass through high and cold, high humidity and high altitude localities, transmission line icing disaster problem
It will more protrude, conductor ice prevention, clearing ice technology have become one of key technology in the West-to-East Electricity Transmission Project.Thus research transmission line of electricity
Not only economic value is huge for anti-icing, deicing, and scientific meaning is far-reaching, it has also become the basic tackling of key scientific and technical problems with major application demand
Project.After multiple calamity, country has promoted preventing ice coating in electric transmission line problem the war to the relationship national economic development and social stability
Slightly higher degree.Therefore, it is badly in need of a kind of high-tension cable that anti-icing effect is good currently on the market.
Utility model content
The purpose of this utility model is to provide a kind of high-tension cable and deicing systems, it is intended to which solution lacks currently on the market
The technical issues of anti-icing effect good high-tension cable.
In order to achieve the above purposes, the technical solution adopted by the utility model is: provides a kind of high-tension cable, comprising: at least
One cut cable and the steel-cored aluminium strand for corresponding and being set in the cut cable with the cut cable, the steel-cored aluminium strand
Including steel core and the aluminum stranded conductor layer being set in outside the steel core, current-carrying heating is provided between the steel core and the aluminum stranded conductor layer
Layer, the current-carrying heating layer include the siderochrome aluminum steel and aluminum stranded conductor for being staggered and surrounding tubular, are coated outside the siderochrome aluminum steel
There is temperature-resistant insulation layer；
When the number of the cut cable is more than two, each cut cable head and the tail are sequentially connected.
Further, the steel core, the aluminum stranded conductor layer, the aluminum stranded conductor corresponding end-faces flush and constitute the cut cable
End face, the end of the siderochrome aluminum steel extends to outside the cut cable end face.
Further, the number of the cut cable is two or more, and the two neighboring cut cable is connected by connector；
The connector includes the outer connector sleeve of steel-cored aluminium strand described in the two neighboring cut cable of electrical connection, electrical connection phase
Siderochrome aluminum steel described in adjacent two cut cables and the interior connector sleeve being set in the outer connector sleeve and the connection outer connection
The connector of set and the interior connector sleeve, the outer connector sleeve are axial axially parallel with the interior connector sleeve.
Further, it is arranged respectively on the outer wall of the interior connector sleeve and on the inner wall or outer wall of the outer connector sleeve useful
In the metallic sheath being connect with the connector.
Further, the connector includes conducting rod and is arranged in exhausted between the conducting rod and the outer connector sleeve
Edge set, the conducting rod are detachably connected respectively with the interior connector sleeve and the outer connector sleeve, and the insulation sleeve is led with described
Electric pole and the outer connector sleeve are detachably connected respectively and are used for the two electrical isolation.
A kind of beneficial effect of high-tension cable provided by the utility model is: compared with prior art, the utility model
High-tension cable has added current-carrying heating layer between the steel core and aluminum stranded conductor layer of steel-cored aluminium strand, while setting in siderochrome aluminum steel peripheral hardware
Temperature-resistant insulation layer.Siderochrome aluminum steel no power under normal circumstances, by the aluminum stranded conductor in steel core, aluminum stranded conductor layer and current-carrying heating layer
Common current-carrying.When there is icing on high-tension cable or when rain and snow weather needs anti-icing, by high-tension cable, there are the cut cables of icing
Or the siderochrome aluminum steel in entire high-tension cable is connected to power supply, siderochrome aluminum steel is powered, generates heat, so that respective cable section or entire high
The temperature of voltage cable increases, to play anti-icing and ice-melt effect.
Wherein, current-carrying heating layer is arranged between steel core and aluminum stranded conductor layer, so that siderochrome aluminum steel is located in high-tension cable
Part is entreated, the risk that siderochrome aluminum steel is broken in high-tension cable carrying or use process is reduced, ensure that high-tension cable is whole
The stability of body structure and the stability of anti-icing effect.When the setting of temperature-resistant insulation layer is not so that high-tension cable needs ice-melt,
Siderochrome aluminum steel no power, high-tension cable can normal current-carrying, while reducing power consumption, meet its requirement.
Using high-tension cable provided by the utility model carry out transmission of electricity can effectively avoid icing phenomenon on cable generation it is several
Rate ensure that the normal operation of transmission line of electricity so that icing phenomenon be avoided to impact the normal work of transmission line of electricity.
The utility model additionally provides a kind of deicing system, including the high-tension cable and two respectively with the high-voltage electricity
The transformer of the both ends connection of cable, the both ends of the high-tension cable are respectively set there are two separately, and a parted hair is by the steel core
Aluminum stranded conductor and aluminum stranded conductor composition are connect by first switch circuit with the corresponding transformer, another is described separately
Siderochrome aluminum steel, by being connect with the second switch circuit of the first switch circuit in parallel with the same transformer.
Further, the first switch circuit and the second switch circuit respectively include connecting it is corresponding separately with it is corresponding
The fuse switch of the transformer.
The beneficial effect of deicing system provided by the utility model is: compared with prior art, the utility model deicing
System uses high-tension cable provided by the utility model, and the end that high-tension cable is used to connect with transformer is according to high pressure
The function of each silk thread sets up separately for two parted hairs in cable, and a parted hair is made of siderochrome aluminum steel, be used for ice-melt when and transformer
Connection, another is made of the aluminum stranded conductor in steel-cored aluminium strand and current-carrying heating layer separately, is used for normal current-carrying.
In use, operator can control first switch circuit and second switch circuit according to the use demand of deicing system
On and off, Lai Shixian current-carrying and/or deicing function.When only needing current-carrying, second switch circuit is disconnected, makes first
Switching circuit conducting, only in high-tension cable for the steel-cored aluminium strand of current-carrying and aluminum stranded conductor and transformer electrical communication, iron at this time
Chromium aluminum steel and transformer electrical isolation, only play the role of mechanically supported.
When ice detachment is desired, in the case where first switch circuit normal ON is powered, second switch circuit, ice-melt are connected
Deicing is powered while being carried out with normal current-carrying.High-tension cable siderochrome aluminum steel and transformer electrical communication, heating and outside heat release,
Cable carries out anti-icing, ice-melt, and simultaneously normally to customer power supply.High-tension cable is grasped using deicing system provided by the utility model
Make simply, deicing effect is good.
Detailed description of the invention
It, below will be to embodiment or the prior art in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this is practical new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of high-tension cable provided by the embodiment of the utility model；
Fig. 2 is that aluminum stranded conductor layer, current-carrying heating layer and steel core ecto-entad used by the utility model embodiment are successively shown
The partial lateral the schematic diagram of the section structure shown；
Fig. 3 is the structural schematic diagram of connector used by the utility model embodiment；
Fig. 4 is the structural schematic diagram of deicing system provided by the embodiment of the utility model；
Fig. 5 is the attachment structure schematic diagram of high-tension cable and transformer used by the utility model embodiment.
In figure: 100, cut cable；200, steel-cored aluminium strand；210, steel core；220, aluminum stranded conductor layer；300, current-carrying heating layer；
310, siderochrome aluminum steel；320, aluminum stranded conductor；400, connector；410, interior connector sleeve；420, outer connector sleeve；430, connector；431,
Conducting rod；432, insulation sleeve；440, metallic sheath；500, transformer；600, fuse switch；700, first switch circuit；
800, second switch circuit.
Specific embodiment
In order to which technical problem to be solved in the utility model, technical solution and beneficial effect is more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
Also referring to Fig. 1 and Fig. 2, now high-tension cable provided by the embodiment of the utility model is illustrated.The height
Voltage cable, corresponds including at least one cut cable 100 and with cut cable 100 and the steel-core-aluminium being set in cut cable 100 twists
Line 200, steel-cored aluminium strand 200 include steel core 210 and the aluminum stranded conductor layer 220 being set in outside steel core 210, steel core 210 and aluminum stranded conductor
Current-carrying heating layer 300 is provided between layer 220, current-carrying heating layer 300 includes the siderochrome aluminum steel 310 for being staggered and surrounding tubular
With aluminum stranded conductor 320, siderochrome aluminum steel 310 is coated with temperature-resistant insulation layer outside；When the number of cut cable 100 is more than two, respectively
100 head and the tail of cut cable are sequentially connected.
High-tension cable provided by the embodiment of the utility model, compared with prior art, in the steel core of steel-cored aluminium strand 200
Current-carrying heating layer 300 has been added between 210 and aluminum stranded conductor layer 220, while high-temperature insulation is provided with outside siderochrome aluminum steel 310
Layer.310 no power of siderochrome aluminum steel under normal circumstances, by the aluminum stranded conductor 320 in steel core, aluminum stranded conductor layer 220 and current-carrying heating layer 300
Common current-carrying.When there is icing on high-tension cable or when rain and snow weather needs anti-icing, add in steel core, aluminum stranded conductor layer 220 and current-carrying
In the case where the normal current-carrying of aluminum stranded conductor 320 in thermosphere 300, by high-tension cable, there are the cut cables 100 of icing or entire high pressure
Siderochrome aluminum steel 310 in cable is connected to power supply, and siderochrome aluminum steel 310 is powered and generates heat, so that respective cable section 100 or entire high
The temperature of voltage cable increases, to play anti-icing and ice-melt effect.
Wherein, current-carrying heating layer 300 is arranged between steel core 210 and aluminum stranded conductor layer 220, so that siderochrome aluminum steel 310 is located at
The central area of high-tension cable reduces the risk that siderochrome aluminum steel 310 is broken in high-tension cable carrying or use process, protects
The stability of high-tension cable integrally-built stability and anti-icing effect is demonstrate,proved.The setting of temperature-resistant insulation layer is so that high-tension cable
When not needing ice-melt, 310 no power of siderochrome aluminum steel, high-tension cable can normal current-carrying, while reducing power consumption, meeting it makes
With requiring.
Carrying out transmission of electricity using high-tension cable provided by the embodiment of the utility model can effectively avoid icing on transmission line of electricity, from
And icing phenomenon is avoided to impact the normal work of transmission line of electricity, it ensure that the normal operation of transmission line of electricity.
Steel-cored aluminium strand 200 and current-carrying heating layer 300 provided by the utility model can be used as the conductor of high-tension cable,
It can according to need outside and different insulating layer, filler, twining package tape, sheath, housing etc. be set different size or type is made
High voltage overhead cable.
In the present embodiment steel core 210 be that single steel wire or more steel wires are twisted or composite steel sandwich layer is successively arranged and
At.Aluminum stranded conductor layer 220 is that single-layer or multi-layer aluminum stranded conductor is twisted.ZS-1091 ceramic high-temperature resistant can be used in temperature-resistant insulation layer
Insulating lacquer layer or in the market existing high-temperature insulation coating.
As a kind of specific embodiment of high-tension cable provided by the utility model, it is coated on the outer wall of high-tension cable
Anti-ice-and-snow coating.
It should be noted that if Anti-ice-and-snow coating directly coats when the outer wall of aluminum stranded conductor layer 220 is the outer wall of high-tension cable
On the outer wall of aluminum stranded conductor layer 220, if being provided with housing outside aluminum stranded conductor layer 220, Anti-ice-and-snow coating is coated in the outer wall of housing
On.The outer wall or outer casing outer wall of aluminum stranded conductor layer 220 are polished or cleaned before coating, Anti-ice-and-snow coating and high pressure can be enhanced
The compactness adhered between cable.
The setting of Anti-ice-and-snow coating then further reduced the steam in rainwater, snowflake or air in the outer of Anti-ice-and-snow coating
The risk adhered on wall, thereby reduce high-tension cable occur icing phenomenon probability, reduce high-tension cable ice cover and
Energy consumption needed for ice-melt plays good anti-icing and energy-saving effect, and then ensure that the normal use of transmission line of electricity.
Anti-ice-and-snow coating can be ZS-611 Anti-ice-and-snow coating in the present embodiment, be also possible to that existing in the market other are anti-icing
Avenge coating.In use, if aging occurs for Anti-ice-and-snow coating, it can be with cable robot (being analogous to high voltage cable deicing machine device people) again
Secondary spraying.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 1, steel core 210, aluminium twist
Line layer 220, aluminum stranded conductor 320 corresponding end-faces flush constitute cut cable 100 end face, the end of siderochrome aluminum steel 310 extends to electricity
Outside 100 end face of cable section.
The end of siderochrome aluminum steel 310 extends to outside the end face of cut cable 100, convenient for user according to the needs of use by ferrum-chromium-aluminum
Line 310 connects to power supply, or the siderochrome aluminum steel 310 in two neighboring cut cable 100 is connected with each other, without using when scene at
Manage the connecting pin of cut cable 100, thus improve assembling high-tension cable or by high-tension cable and transformer 500 or other for Denso
Set the convenience of attended operation.
In the present embodiment siderochrome aluminum steel 310 extend the length outside cut cable end face can for 150-200mm, convenient for its with
Siderochrome aluminum steel 310 in transformer 500 or another cut cable 100 connects.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 3, cut cable 100
Number is two or more, and two neighboring cut cable 100 is connected by connector 400；Connector 400 includes electrical connection adjacent two
The outer connector sleeve 420 of steel-cored aluminium strand 200 in a cut cable 100, siderochrome aluminum steel in the two neighboring cut cable 100 of electrical connection
310 and be set to outer connector sleeve 420 in interior connector sleeve 410 and connect in connector sleeve 410 and outer connector sleeve 420 connector 430,
Outer connector sleeve 420 is axial axial parallel with interior connector sleeve 410.
When connecting two neighboring cut cable 100, the siderochrome aluminum steel 310 of two cut cables 100 is first passed through into interior connector sleeve 410
It connects, then the steel-cored aluminium strand 200 of two cut cables 100 is connected by outer connector sleeve 420, later by interior connection
Set 410 and outer connector sleeve 420 are attached by connector 430.
Wherein, the setting of connector 430 realizes the fixation of 420 relative position of interior connector sleeve 410 and outer connector sleeve, avoids
There is a phenomenon where mobile are electrically connected with outer connector sleeve 420 to send out in outer connector sleeve 420 for interior connector sleeve 410 in use process
It is raw, it is ensured that high-tension cable assembles the stability of rear overall structure and working performance.Interior connector sleeve 410 and outer connector sleeve 420
Conductive cylindrical sleeve is respectively adopted, after connecting convenient for two neighboring cut cable 100 by connector 400, in two cut cables 100
Steel-cored aluminium strand 200 can be electrically connected to each other, and siderochrome aluminum steel 310 can be electrically connected to each other, and meet the use of high-tension cable
It is required that.Outer connector sleeve 420 is used to connect the aluminum stranded conductor layer 220 of two neighboring cut cable 100, undertakes the tension and load of high-tension cable
Flow function；Interior connector sleeve 410 is used to connect the siderochrome aluminum steel 310 of two neighboring cut cable 100, undertake the anti-icing of high-tension cable and
Ice-melt function.Connector 400 is small in size, it is at low cost, be easily installed, long-play its be less than with 100 contact resistance of cut cable
With 1.2 times of length core resistance.
Connector 430 can use conducting connecting part or insulated connecting piece as needed, or using electric with interior connector sleeve 410
Gas connection and the connector with outer 420 electrical isolation of connector sleeve.When high-tension cable does not need deicing or needs all fronts section deicing,
Connector 430 uses insulated connecting piece, when some cut cable 100 needs deicing in high-tension cable, is located at the cable
Conducting rod can be used in connector 430 in the connector 400 at 100 both ends of section, so that the siderochrome aluminum steel 310 in the cut cable 100
The increasing of 100 temperature of cut cable is realized so that siderochrome aluminum steel 310 shunts, fever with 200 electrical communication of steel-cored aluminium strand
Add, realizes the ice-melt operation of the cut cable 100.
The present embodiment China and foreign countries connector sleeve 420 and interior connector sleeve 410 are respectively aluminium or copper at corrosion-resistant and current-carrying effect is good
It is good, it can also be made of the good metal of the low current-carrying effect of other resistivity.410 shape one of outer connector sleeve 420 and interior connector sleeve
It causes, respectively conductive cylindrical sleeve, interior connector sleeve 410 is the scaled down version of outer connector sleeve 420, and length and diameter is respectively less than outer connection
Set 420.After connector 400 installs, the spacing between interior connector sleeve 410 and outer connector sleeve 420 can be 5-10mm, interior connection
It covers and is isolated between 420 inner wall of 410 outer walls and outer connector sleeve with air.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 3, interior connector sleeve 410
Outer wall on and the inner wall or outer wall of outer connector sleeve 420 on be arranged with metallic sheath 440 for connecting with connector 430 respectively.
The setting of metallic sheath 440 improves the machine of outer connector sleeve 420 and interior connector sleeve 410 and 430 coupling part of connector
Tool intensity reduces the risk that repeated disassembled and assembled connector 430 causes outer connector sleeve 420 or interior connector sleeve 410 to deform, and guarantees
The integrally-built stability of connector 400 and longer service life.
Metallic sheath 440 is aluminium or copper at current-carrying works well, and can also use the low load of other resistivity in the present embodiment
The good metal of stream effect is made.Metallic sheath 440 is located at the middle part of interior connector sleeve 410 or outer connector sleeve 420, is located at interior connector sleeve
Metallic sheath 440 on 410 is an integral molding structure with interior connector sleeve 410, the metallic sheath 440 on outer connector sleeve 420 and outer
Connector sleeve 420 is an integral molding structure.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 3, connector 430 wraps
The insulation sleeve 432 for including conducting rod 431 and being arranged between conducting rod 431 and outer connector sleeve 420, conducting rod 431 and interior connector sleeve
410 and outer connector sleeve 420 be detachably connected respectively, insulation sleeve 432 detachably connects respectively with conducting rod 431 and outer connector sleeve 420
It connects and is used for the two electrical isolation.
When not needing deicing or needing all fronts section ice-melt, by the installation of insulation sleeve 432 to conducting rod 431 and outer connector sleeve
Between 420, conducting rod 431 and outer connector sleeve 420 are in electrical isolation state, so that the siderochrome aluminum steel in high-tension cable
310 and steel-cored aluminium strand 200 keep electrical isolation state.When needing all fronts section ice-melt, by siderochrome aluminum steel 310 in high-tension cable
One end be connected to power supply.
For long distance powedr transmission, when needing local segment ice-melt, icing situation on each cut cable 100 is detected；It will deposit
Insulation sleeve 432 in the connector 400 at 100 both ends of cut cable of icing removes, so that conducting rod 431 and outer connector sleeve 420
It directly contacts, and then realizes the electrical communication of interior connector sleeve 410 and outer connector sleeve 420, that is, realize ferrum-chromium-aluminum in the cut cable 100
200 electrical communication of line 310 and steel-cored aluminium strand realizes the cut cable 100 so that siderochrome aluminum steel 310 shunts, fever, heating
Ice-melt.If multiple cut cables 100, which occurs, in interval distinguishes icing, operation is ibid, it can be achieved that segmentation ice-melt.
When interior connector sleeve 410 and outer 420 electrical communication of connector sleeve, 310 current potential of siderochrome aluminum steel under non-power status with
The current potential of steel-cored aluminium strand 200 and aluminum stranded conductor 320 is essentially identical, has to the temperature-resistant insulation layer on 310 surface of siderochrome aluminum steel and protects
Shield effect avoids temperature-resistant insulation layer breakdown under high electric field effect.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 3, conducting rod 431 is
Metal screw is threadedly coupled with interior connector sleeve 410, is connect with outer connector sleeve 420 by insulation sleeve 432, insulation sleeve 432 is insulation
Plastic sheet is respectively arranged on interior connector sleeve 410 and outer connector sleeve 420 and is threadedly engaged with metal screw or mating installation
Hole, convenient for the installation or removal of conducting rod 431, install or remove conducting rod 431 can be operated by screwdriver.And installation connection
When device 400, the mounting hole on interior connector sleeve 410 and outer connector sleeve 420 need to be aligned, so as to the installation of conducting rod 431.In addition,
The inner hole of insulation sleeve 432 includes upper hole and below upper hole and the lower opening that be connected to upper hole, upper hole aperture greater than lower opening aperture,
Convenient for the insertion of conducting rod 431.
As a kind of specific embodiment of high-tension cable provided by the utility model, referring to Fig. 3, conducting rod 431
Outer end pass through outer connector sleeve 420 extend to outside outer connector sleeve 420, convenient for operator as needed by the outer end of conducting rod 431 with
Power supply connection, to realize the electrified regulation of siderochrome aluminum steel 310 in some cut cable 100, and then realizes this section of cut cable 100
Ice-melt operation.
The utility model also provides a kind of deicing system.Fig. 4 and Fig. 5 are please referred to, the deicing system includes high-tension cable
With two transformers being connect respectively with the both ends of high-tension cable 500, the both ends of high-tension cable be respectively set there are two separately, one
A parted hair is made of steel-cored aluminium strand 200 and aluminum stranded conductor 320, is connect by first switch circuit 700 with corresponding transformer 500,
Another is siderochrome aluminum steel 310 separately, passes through the second switch circuit 800 in parallel with first switch circuit 700 and same transformation
Device 500 connects.
Deicing system provided by the utility model uses high-tension cable provided by the utility model, and by high-tension cable
Set up separately according to the function of silk thread each in high-tension cable for two parted hairs, a parted hair end for being connect with transformer 500
Be made of siderochrome aluminum steel 310, when for ice-melt with steel-cored aluminium strand 200 and connect, be then connected to transformer 500, another point
Head is made of aluminum stranded conductor 320 in steel-cored aluminium strand 200 and current-carrying heating layer 300, is used for normal current-carrying.In use, operator
The on and off that first switch circuit 700 and second switch circuit 800 can be controlled according to the use demand of deicing system is come real
Existing current-carrying and/or deicing function.
When only needing current-carrying, second switch circuit 800 is disconnected, first switch circuit 700 is connected, only high-tension cable
In for current carrying part (except 310 part of siderochrome aluminum steel) and 500 electrical communication of transformer, siderochrome aluminum steel 310 and transformer 500
Electrical isolation only plays the role of mechanically supported.When ice detachment is desired, first switch circuit 700 and second switch circuit 800 is equal
Conducting, each silk thread, both can also anti-icing and ice-melt with current-carrying respectively with 500 electrical communication of transformer in high-tension cable at this time.
Easy to operate using deicing system provided by the utility model, deicing effect is good.
When using high-tension cable provided by the utility model and deicing system deicing, two ascending, descending transformations will be located at first
Connector 430 and outer 420 electrical communication of connector sleeve on certain connector 400 at the middle part of device 500, the company on other connectors 400
Fitting 430 and the insulation of outer connector sleeve 420 connect.
(1) when high-tension cable does not need deicing, the use of connector 430 and outer connector sleeve 420 insulation connection type, and electricity
Two two of cable both ends are not connected to transformer 500 separately.(2) when in high-tension cable some cut cable 100 need deicing
When, the connector 430 and accordingly outer 420 electrical communication of connector sleeve in the connector 400 for being located at 100 both ends of cut cable make
The siderochrome aluminum steel 310 and 200 electrical communication of steel-cored aluminium strand in the cut cable 100 are obtained, so that the shunting of siderochrome aluminum steel 310,
Fever, realizes the increase of 100 temperature of cut cable, realizes the ice-melt operation of the cut cable 100.(3) when two transformations are pressed in ascending, descending
When cable between device 500 needs ice-melt close to half section of step-up transformer or half section of step-down transformer, by 700 He of first switch circuit
Second switch circuit 800 is respectively communicated with, and carries out the ice-melt of all fronts section.(4) cable between two transformers 500 are pressed in ascending, descending needs complete
When line segment ice-melt, first switch circuit 700 and second switch circuit 800 are respectively communicated with, carry out the ice-melt of all fronts section.
In addition, ordinary high pressure cable can also be installed in deicing system, only needing anti-icing location that the utility model is installed
The high-tension cable of offer.It is distributed (icing historical record) according to transmission line icing section, using height provided by the utility model
Voltage cable, which carries out ice-melt, can be divided to two kinds of strategies,
The first strategy: system-wide segment frame sets such high-tension cable between step-up transformer and step-down transformer.Ice-melt behaviour
The interior connector sleeve 410 of certain connector 400 and outer connector sleeve 420 are realized by conducting rod 431 when making, in the middle part of high-tension cable electrically connects
It is logical.Half section or system-wide section ice-melt are selected according to icing position distribution section.When half section ice-melt, by the section end or beginning
Siderochrome aluminum steel 310 end where route by closure second switch circuit 800 (with first switch circuit 700 and connect) with rise
Pressure transformer or step-down transformer connection.310 electrified regulation of section siderochrome aluminum steel, high-tension cable heat ice-melt.System-wide Duan Rong
When ice, by the place route at 310 both ends of siderochrome aluminum steel in the section by closure second switch circuit 800 (with first switch electricity
Road 700 simultaneously connects) it is respectively communicated with two transformers 500.310 electrified regulation of system-wide iron leg chromium aluminum steel, high-tension cable heat ice-melt.
Second of strategy: part way sets up such high-tension cable between step-up transformer and step-down transformer, whole
High-tension cable between two transformers 500, the both ends of high-tension cable not with step-up transformer or the direct phase of step-down transformer
It connects.When ice-melt, as long as the steel-cored aluminium strand 200 of the 310 both ends end of siderochrome aluminum steel of high-tension cable and place end is passed through company
The connector 430 connect on device 400 is connected to, and high-tension cable can heat ice-melt.
It is emphasized that be anti-misoperation, cable implement ice-melt, it is anti-icing when must be carried out simultaneously with normal power supply, absolutely
Second switch circuit 800 cannot be individually turned in the case where first switch 700 access failure of circuit, otherwise high pressure heavy current allows
Siderochrome aluminum steel 310 carries alone, immediately burns out high-tension cable.Therefore, first switch circuit 700 individually can freely control on-off,
As long as second switch circuit 800 is connected, first switch circuit 700 is inevitable to be connected therewith simultaneously.To cut off cable power, it is necessary to
Second switch circuit 800 is first disconnected, first switch circuit 700 is then turned off, it must not be opposite.Or it is individually operated, when ice-melt,
Must first switch circuit 700 close a floodgate under the premise of could combined floodgate second switch circuit 800.
In view of easy to operate and energy consumption, it is proposed that high-tension cable provided by the utility model is set up using the first strategy,
System-wide segment frame sets such high-tension cable i.e. between ascending, descending pressure transformer, and uses dichotomy mode by intermediate somewhere connector
The interior connector sleeve 410 of 400 (being generally located on certain tension-resistant rod) is connected with the electrical connection of outer connector sleeve 420 (to be removed and covers
Interior connector sleeve 410 is connected to, such siderochrome aluminum steel by the insulation sleeve 432 on conducting rod 431 with the outer conducting rod 431 of connector sleeve 420
310 current potentials are essentially identical with steel-cored aluminium strand 200,320 current potential of aluminum stranded conductor under non-power status, to 310 surface of siderochrome aluminum steel
Insulation function have protective effect, and be unlikely to high electric field act under puncture), which will be between two transformers 500
High-tension cable be divided into two, the interior connector sleeve 410 and outer connector sleeve 420 of other connectors 400 are in electrical isolation state and (lead
Insulation sleeve 432 on electric pole 431 does not take out).Two parted hair 2 of high-tension cable both ends is under normal conditions routine with 500 junction of transformer
Transmission of electricity connection (i.e. first switch circuit 700 is connected to, and second switch circuit 800 disconnects).It is distributed according to icing section and connects boosting
The every two 2 corresponding drop types of parted hair of phase of the every two 2 corresponding fuse switches 600 of parted hair of phase of transformer terminal or step-down transformer end
Fuse 600 implements front half section ice-melt or second half section ice-melt, or is all turned on every two parted hair 2 of phase in ascending, descending pressure transformer end simultaneously
Corresponding 600 (A of fuse switch2、B2、C2) implement the ice-melt of system-wide section.The laying and installation of entire high-tension cable are in addition to cable
The connection of head is divided to other than inside and outside two kinds of connections, and the every phase in 500 end of transformer is only needed to increase by a 600 (A of fuse switch2、B2、
C2), other operations are identical as existing high-tension cable, will not bring use, operational inconvenience.
As a kind of specific embodiment of deicing system provided by the utility model, Fig. 4 and Fig. 5 are please referred to, first opens
Powered-down road 700 and second switch circuit 800 respectively include connecting it is corresponding separately and the fuse switch of corresponding transformer 500
600。
When short circuit occurs for high-tension cable, fuse is disconnected in fuse switch 600, circuit disconnects, and effective protection becomes
Depressor 500 improves safety and longer service life that deicing system uses.
It works well further to verify the deicing of high-tension cable provided by the utility model, utility model people is to high-voltage electricity
The pressure drop of cable and anti-icing amount have carried out budget, and when budget puts aside electric inductance power factor, and cable size and phase line spacing are equivalent
Property problem and other leakage losses, it is assumed that high-tension cable laying length is 10km, conveys 10kv high pressure.
1. steel core 210 is by being located at 1 steel core wire in cable center and surrounding the steel core wire referring to LGJ-240/40 type cable
Outer steel core wire layer composition, steel core wire layer surround annular by 6 steel core wires are twisted, and aluminum stranded conductor layer 220 is by the double-deck aluminum stranded conductor layer structure
At the aluminum stranded conductor layer positioned inside is twisted by 10 aluminum stranded conductors, and the aluminum stranded conductor layer positioned at outside is twisted by 16 aluminum stranded conductors
It forms.
It is assumed that rated current is I at 20 DEG CVolume=440A, taking length L=1.0m is research object, calculates its pressure drop.1 meter
Long cable resistance is divided into two parts (parallel connection): 7 steel core line resistance (resistivity ρsteel=3.35 × 10-8Ω .m) and 26 aluminium
Twisted wire resistance (resistivity ρAl=2.83 × 10-8Ω .m) it is respectively as follows:
1 meter long cable all-in resistance is RAlways, indicate are as follows:
Its pressure drop are as follows:
ΔU1=IVolumeRAlways=440A × 0.01042122 × 10-2Ω=4.5853368 × 10-2V (4)
Corresponding 10km long route pressure drop are as follows:
Voltage loss rate are as follows:
By regulation, the loss of high voltage supply line voltage distribution is usually no more than route voltage rating 7%.So even if considering electricity
Anti- equal other factors influence, and above-mentioned line loss can be ignored.
2. if temperature is from the pressure drop of cable when rising to 70 DEG C for 20 DEG C
It is assumed that rated current is still I at 70 DEG CVolume=440A, taking length L=1.0m is research object, calculates its pressure drop.1
The long cable resistance of rice is divided into two parts (parallel connection): 7 steel core line resistances and 26 aluminum stranded conductor resistance are respectively RsteelAnd RAl,
The resistivity of steel and aluminium, is based on metal material resistivity and temperature relation ρ when calculating 70 DEG C firstt=ρ0(1+αt)
(α and ρ0The temperature coefficient of the respectively temperature coefficient of material, resistivity at 0 DEG C, aluminium and steel is respectively αAl=3.90 × 10- 31/℃,αsteel=5.00 × 10-3/ 1 DEG C) relational expression when can establish 70 DEG C and 20 DEG C of room temperature between resistivity:
The resistivity of aluminium and steel wire is respectively as follows: when thus can calculate 70 DEG C
ρAl=3.342 × 10-8Ω .m, ρsteel=4.111 × 10-8Ω.m (8)
Iron-chrome-aluminium-alloy resistivity itself is seldom, and temperature coefficient is also seldom, can be approximately considered constant.Then it can calculate:
1 meter long cable all-in resistance is RAlways, indicate are as follows:
Its pressure drop are as follows:
ΔU1=IVolumeRAlways=440A × 1.2362103 × 10-4Ω=0.05439325 × 10-2V (12)
Corresponding 10km long route pressure drop are as follows:
The line voltage distribution proportion of goods damageds are as follows:
So temperature is from when rising to 70 DEG C for 20 DEG C of room temperature, every myriametre change in pressure drop are as follows:
The same above proportion of goods damageds and increased waste also not what.Above description: LGJ-240/40 high-tension cable
When transmission of electricity, when temperature is from when rising to 70 DEG C for 20 DEG C of room temperature, the fluctuation of pressure drop does not interfere with normal power supply on cable.
3.LGJ-240/40 high-tension cable removes pressure drop when 5 aluminum steels (21 aluminum steel transmissions of electricity) transmission of electricity, i.e., this is practical new
The normal power supply pressure drop for the high-tension cable that type provides
21 aluminum steel resistance are as follows:
1 meter long cable all-in resistance is R at this timeAlways, indicate are as follows:
Its pressure drop are as follows:
ΔU1=IVolumeRAlways=440A × 0.0125414 × 10-2Ω=5.518216 × 10-2V (18)
Corresponding 10km long route pressure drop are as follows:
After so removing 5 aluminum steels, every myriametre change in pressure drop are as follows:
It can be seen that it is little to remove cable voltage drop knots modification fluctuation after 5 aluminum steels.
The line voltage distribution proportion of goods damageds are as follows:
Equally, the above proportion of goods damageds and increased waste also can be ignored, and limiting within 7% is that can obtain
's.Above description: non-to melt after LGJ-240/40 high-tension cable time 5 aluminum stranded conductors of outer layer are replaced by 5 siderochrome aluminum steels of same scale
26 aluminum stranded conductors become 21 aluminum stranded conductors (5 ferrum-chromium-aluminums together with internal 7 steel core wire mutual loads power supply in the case of ice transmission of electricity
Heating wire only undertakes mechanical load without undertaking electric load under non-ice coating state, only starts anti-icing function in icing
Just undertake mechanically and electrically two kinds of functions of stream loading) power together with 7 internal steel core wire mutual loads, on every 10km power transmission line
Compared to 26 aluminum stranded conductors of pressure drop at 20 DEG C of room temperature increase together with pressure drop caused by internal 7 steel core wire mutual loads power supply
Add 93-85=8V, this increment is very little, the generated pressure drop proportion of goods damageds only 5.52%, considers other losses, pressure drop damage
The control of consumption rate is still that can do below 7%.Thus the utility model design can satisfy requirement.
4. ice storage estimation of generating heat
5 aluminum stranded conductors in LGJ-240/40 cable close to steel core 210 are replaced with siderochrome aluminum steel 310, and that this is made is practical new
The high-tension cable that type provides, taking 1m long cable is research object, is powered 120 minutes, quantity of heat production may be expressed as:
QIt puts=0.24I2Rt=0.24 × 4402×1.199652×10-4× 120 × 60=40133.254cal (22)
Do not consider scattering losses, it is assumed that be completely used for ice-melt, ice storage mIce, indicate are as follows:
Wherein ice heat of solution λIceFor its volume of 80cal/g are as follows:
After diagram removing ice from cable, the volume of ice be may be expressed as:
VIce=π (r2-r0 2) L=π (r2-1.0832) × 100=557.4cm3 (25)
Such ice storage is covered on cable, and cable radius becomes r, is indicated are as follows:
The then thickness of icing are as follows:
Δ r=r-r0=1.717-1.083=0.634cm (27)
In fact, icing is not equal, thawing is due to gravity completely and low adherency will fall with surface Anti-ice paint.
Deicing amount is much higher than above data certainly in two hours.Above-mentioned estimation shows: high-tension cable provided by the utility model is prevented
Ice, ice-melt effect are significant.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (7)
1. a kind of high-tension cable, it is characterised in that: correspond and be set to including at least one cut cable and with the cut cable
Steel-cored aluminium strand in the cut cable, the steel-cored aluminium strand include steel core and the aluminum stranded conductor layer that is set in outside the steel core,
Current-carrying heating layer is provided between the steel core and the aluminum stranded conductor layer, the current-carrying heating layer includes being staggered and surrounding cylinder
The siderochrome aluminum steel and aluminum stranded conductor of shape, the siderochrome aluminum steel are coated with temperature-resistant insulation layer outside；
When the number of the cut cable is more than two, each cut cable head and the tail are sequentially connected.
2. high-tension cable as described in claim 1, it is characterised in that: the steel core, the aluminum stranded conductor layer, the aluminum stranded conductor
Corresponding end-faces flush the end face for constituting the cut cable, and the end of the siderochrome aluminum steel extends to outside the cut cable end face.
3. high-tension cable as claimed in claim 2, it is characterised in that: the number of the cut cable is more than two, and adjacent two
A cut cable is connected by connector；The connector includes being electrically connected steel core described in the two neighboring cut cable
The outer connector sleeve of aluminum stranded conductor is electrically connected siderochrome aluminum steel described in the two neighboring cut cable and is set in the outer connector sleeve
Interior connector sleeve and the connection outer connector sleeve and the interior connector sleeve connector, the outer connector sleeve is axial and the interior company
Female connector is axially parallel.
4. high-tension cable as claimed in claim 3, it is characterised in that: on the outer wall of the interior connector sleeve and the outer connector sleeve
Inner wall or outer wall on be arranged with metallic sheath for connecting with the connector respectively.
5. high-tension cable as described in claim 3 or 4, it is characterised in that: the connector includes conducting rod and is arranged in institute
It states the insulation sleeve between conducting rod and the outer connector sleeve, the conducting rod and the interior connector sleeve and the outer connector sleeve is distinguished
It is detachably connected, the insulation sleeve is detachably connected with the conducting rod and the outer connector sleeve respectively and for the two is electrical
Isolation.
6. deicing system, it is characterised in that: including any one of the claim 1-5 high-tension cable and two respectively with the height
The transformer of the both ends connection of voltage cable, the both ends of the high-tension cable are respectively set there are two separately, and a parted hair is by described
Steel-cored aluminium strand and aluminum stranded conductor composition are connect by first switch circuit with the corresponding transformer, another is separately
The siderochrome aluminum steel, by being connect with the second switch circuit of the first switch circuit in parallel with the same transformer.
7. deicing system as claimed in claim 6, it is characterised in that: the first switch circuit and the second switch circuit
Respectively include the corresponding fuse switch with the corresponding transformer separately of connecting.
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| CN110112694A (en) * | 2019-05-14 | 2019-08-09 | 凯里学院 | A kind of high-tension cable, cable connection methods, de-icing method and deicing system |
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