CN103415894A - Insulating assembly for an HVDC component having wall-like solid barriers - Google Patents
Insulating assembly for an HVDC component having wall-like solid barriers Download PDFInfo
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- CN103415894A CN103415894A CN2011800691235A CN201180069123A CN103415894A CN 103415894 A CN103415894 A CN 103415894A CN 2011800691235 A CN2011800691235 A CN 2011800691235A CN 201180069123 A CN201180069123 A CN 201180069123A CN 103415894 A CN103415894 A CN 103415894A
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- seal
- cellulosic material
- solid insulation
- wall thickness
- electricalresistivityρ
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
- H01F27/363—Electric or magnetic shields or screens made of electrically conductive material
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/185—Substances or derivates of cellulose
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/32—Insulating of coils, windings, or parts thereof
- H01F27/322—Insulating of coils, windings, or parts thereof the insulation forming channels for circulation of the fluid
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/36—Electric or magnetic shields or screens
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Insulating Of Coils (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to an insulating assembly for an HVDC component, such as a transformer, for example. According to the invention, solid barriers (26, 27) are produced from a cellulose material-containing composite, the resistivity of which is lower as compared to untreated cellulose material. The wall thickness of the solid barriers (26, 27) can thus advantageously be reduced, whereby, for example, the leakage flux channel width (35) between the individual elements (22, 23) in the HVDC component can be reduced. Thus, design freedom is advantageously increased, which results especially in a more compact construction. The invention can be used in particular for HVDC transformers and HVDC reactors.
Description
Technical field
The present invention relates to a kind of for the high voltage direct current transmission assembly, especially the seal of transformer or choke valve, it comprise a series of wall shapes, by the solid insulation that cellulosic material is made, between these solid insulations, be provided for the gap of transformer oil and they form insulating segment together with transformer oil.
Background technology
Start the seal of described type for example from known EP285895.The high voltage direct current transmission assembly is for example the connecton layout for the electrical connection of high-voltage dc transmission piezoelectric transformer, this connecton layout electric insulation and necessary shielding.At this, use the solid insulation formed by press board, wherein, the press board that this press board is relatively general has higher conductibility.Solid insulation form a plurality of spaces, around the coaming plate of connecton layout, the gap of filling with transformer oil in order to be formed between them.The insulating segment that one group of gap of filling with transformer oil and solid insulation are formed for connecton layout.
By US4,521,450 is known, and the solid material that can flood, consist of cellulose fibre immerses the oxidant of water-based, for example, in the weakly acidic solution that ferric trichloride (III) solution, cerous sulfate (IV), iron (III) potassium cyanide or phosphomolybdic acid form.Then, the azole compounds of moistening cellulosic material and liquid state or steam-like is at room temperature processed always, until pyrroles's ground relevant with the concentration of oxidant polymerization.By impregnated like this cellulosic material at room temperature dry 24 hours.Oxidant guarantees the polymerization of azole compounds on the one hand, guarantees in addition to increase conductivity.Therefore, the electricalresistivityρ of this impregnated cellulosic material can be subject to the impact of the kind of pyrroles's concentration and oxidant.
Known in addition, if relate in the situation that forms electric field, especially on the insulating barrier of electric conductor, reduce peak value, nano-complex also can be as the material of classification electric field.For this reason, by WO2004/038735A1, also can use the material for example formed by polymer.In this material, be dispersed with filler, its particle is nano particle, that is to say the average diameter with maximum 100nm.Press US2007/0199729A1, can also use semi-conducting material for this nano particle, its band gap is in 0eV in the scope of 5eV.For example, by the nano particle used, formed by ZnO, can regulate the resistance of nano-complex.If when sneaking into nano particle, surpass certain volume share, this share depending on the size of nano particle be 10 to 20% percents by volume, the resistivity of nano-complex obviously reduces, wherein, the conductivity of nano-complex can regulate by this way and can with required Condition Matching.Especially can regulate the order of magnitude 10
12The resistivity of Ω m.Therefore, if reach voltage drop by nano-complex, this voltage drop causes electromotive force to distribute more uniformly and therefore also in the mode be applicable to, makes the electric-force gradient produced.The peak electric field that can reduce to produce thus, thus breakdown strength advantageously improved.When needs have the electric conductor of alternating voltage, there is equally the electric-force gradient effect, this electric-force gradient effect is according to other mechanism certainly.The effect of nano-complex weakening electric field is relevant in this permittivity with nano-complex, and wherein, electric permittivity epsilon is the tolerance that material can see through the ability of electric field.This permittivity, also referred to as dielectric constant, wherein, below should be used concept " permittivity ".People also will pass through electric permittivity epsilon
r=ε/ε
0The material electric permittivity epsilon and the electric field constant ε that mean
0The ratio that (permittivity of vacuum) becomes is called relative permittivity.Relative permittivity is higher, and the effect that the material used is compared vacuum weakening electric field is also just larger.Below only relate to the permittivity of use material.
In addition, WO2006/122736A1 describes a kind of by cellulose fiber peacekeeping nanotube, and preferably the system of carbon nano-tube (following title CNT) composition, wherein, can set the resistivity converted by 6 to 75 Ω m.This nano-complex for example should be used as resistive heating device, wherein, considers that material designs conductibility from the ability of electric energy energy transform into heat energy.For this reason, need carbon nano-tube, to cellulose fibre, enough coverages are arranged.
WO2006/131011A1 describes a kind of slot, and this slot can also consist of impregnated paper roll.Except other materials, material B N is also as the material flooded.This material also can be used with the form of doping.In addition, should use the concentration that has in the cellulosic material particle lower than percolation threshold, in order to not there will be particle mutually to electrically contact.Due to this reason, the resistivity of nano-complex is not affected basically.
From known a kind of nano-complex with semiconductor or non-conductor nano particle the application that the application is disclosed constantly, application number is DE102010041630.4, these nanoparticulate dispersed are at cellulosic material, for example in press board, this cellulosic material can be as the material that makes electric-force gradient in transformer.At least a portion that is dispersed in the nano particle in cellulosic material has the foreskin of being made by conducting polymer.For example can make paper using, cardboard or press board as cellulosic material.This cellulosic material has the structure of being made by cellulose fibre, and this structure forms the connection of cellulosic material on the whole at it.For example can use Si, SiC, ZnO, BN, GaN, A1N or C, especially boron nitride nano-tube (below be called BNNT) are as partly leading or the nano particle of the non-property led.Can use the polymer of mentioning in DE102007018540A1 as the polymer conducted electricity.For example the derivative of polypyrrole, polyaniline, polythiophene, polyparaphenylene, poly-phenylene vinylene (ppv) and described polymer is as the polymer of conduction.PEDOT is the special example of this polymer, and the commodity of this PEDOT are called Baytron, are produced by Beyer Co., Ltd.PEDOT with its systematic name also referred to as poly-(3,4-rthylene dioxythiophene).
By the application constantly before disclosed application number be the application of DE102010041635.5, also can stipulate, macerate is comprised of polymer, this polymer is by the ionomer of negative electrical charge, especially the ionomer of PSS and positive charge is crosslinked forms.Ionomer as positive charge can preferably be used PEDOT or PANI.Poly-(3,4-rthylene dioxythiophene) mentioned is called PEDOT.PANI is polyaniline, and PSS is Polystyrene Sulronate.The ionomeric use of negative electrical charge and positive charge can realize advantageously that cellulosic material especially simply manufactures.Ionomer can be easy in water, dissolve and therefore flow to the manufacture process of same cellulosic material based on water.By crosslinked ionomer after manufacturing cellulosic material, the resistivity of cellulosic material descends.In this ionomer polymerization and in cellulosic material, form conductive network, this conductive network is responsible for reducing resistivity.Especially also can use described ionomer, the semiconductor of having mentioned in order to seal or idioelectric nano particle.
Disclosed before the moment by the application, application number is the application of DE102009033267.7, nano-complex also can be with semi-conductive nano particle dipping, the nano particle of this semiconduction is comprised of BNNT at least partly, and is dispersed in cellulose or polymer.Improve effective conductibility regulation that at least a portion is dispersed in the BNNT in insulating material, the dopant material that doping is applicable to BNNT or on BNNT with the coated semiconductor of metal or doping.The concentration of BNNT can be chosen as, and making nano-complex have the order of magnitude is 10
12The electricalresistivityρ of Ω m.By this modification, can not use the foreskin of conductive polymer as BNNT.
The method that doping realizes is, the following modification of dopant material that BNNT is applicable to by interpolation, make the dopant material atom form electronic state, this electronic state make BNNT form the p conductor (that is, formation is by the electronic state of valence-band edge trapped electrons) or form n conductor (that is, reach due to thermal excitation by the electronic state of conduction band limit electron emission).Consider that for example Be is as the dopant material for the p doping, Si is as the dopant material for the n doping.The doping of this BNNT can be carried out in position, wherein, for example by gas phase or liquid phase, forms the dopant material atom when BNNT grows.Also feasiblely be, doping can be carried out in other steps after the BNNT growth, and wherein, dopant material generally adds under the impact of heat treatment BNNT.By dopant material is added to BNNT, can be the representative value between 0.1 to 1000 Ω cm for the semiconductor of doping by resistivity decreased.
, application number disclosed constantly by the application is the application of DE102009033268.5, can also be with semi-conductive nano particle dipping by the nano-complex that cellulosic material is made, wherein, also in order to improve at least a portion, be dispersed in effective conductibility of the nano particle in insulating material, regulation is to more nano-particle doped dopant materials.Use semi-conductive nano particle, especially the advantage of BNNT is, in the medium and small compactedness of insulating material, and the highest 5% percent by volume, preferably even the highest 2% percent by volume is enough to cause the diafiltration of nanoparticle also therefore to improve the conductivity of nano-complex.
Summary of the invention
Technical problem to be solved by this invention is, a kind of seal for the high voltage direct current transmission assembly is provided, and this seal is opened up a larger structural gap, has especially realized joint space-efficient structure.
This technical problem solves by the present invention thus by starting described seal, and the wall thickness that solid insulation is designed to the compound be comprised of processed cellulosic material and solid insulation is compared required wall thickness when replacing compound to use relevant untreated cellulosic material and reduced.The method of processing cellulosic material by the present invention is to have the electricalresistivityρ who compares untreated cellulosic material
pThe particle of less resistivity disperses with the concentration higher than percolation threshold.As a supplement or alternatively also can stipulate, in cellulosic material, to have the electricalresistivityρ who compares untreated cellulosic material
pThe network interconnected of the conducting polymer of less resistance passes compound.The manufacture beginning of this processed cellulosic material is set forth.
Basic thought of the present invention is, the use of processed cellulosic material automatically reduces the electricalresistivityρ in above-mentioned mode
Comp.The reducing of resistivity advantageously causes the electricalresistivityρ with transformer oil
oEquate, therefore when requiring to have galvanic seal, the voltage on insulating segment advantageously descends more equably.This means the voltage drop of greater part and reduced by this way the load of solid insulation on transformer oil.This known effect itself now also can be for the structural modification of the geometry of seal by the present invention.This particularly the wall thickness by solid insulation reduce realize.The wall thickness of solid insulation is now namely not for desired certain mechanical stability design, but for the design of the electric loading of solid insulation, so this wall thickness is 2 to 3 orders of magnitude because the resistivity of the resistivity of transformer oil and cellulosic material is different when the untreated cellulosic material of use.The wall thickness of the solid insulation therefore, usually used in the high voltage direct current transmission assembly is 3 to 6mm now.
By solid insulation, have by cellulosic material of the present invention by the present invention's design, wall thickness can reduce, and advantageously reduces at least 25%.At this, consider, the gap between solid insulation keep its calculating and gap width with use process or untreated cellulosic material for solid insulation irrelevant.Can advantageously derive thus, the space requirement of seal generally speaking reduces when use has the solid insulation of the wall thickness reduced.Can particularly advantageously use and have 1mm at least, the solid insulation of maximum 3mm wall thickness.The wall thickness of 1mm is the design limit of solid insulation machinery at this, so that it will also have enough stability when the high voltage direct current transmission assembly will be used from now on.This means, if each solid insulation so far commonly used wall thickness be 3 to 6mm, advantageously to 5mm, can save structure space.Therefore, at the best of times, wall thickness reduces approximately 83%.Because seal for example, is comprised of a plurality of shells (5-10 shell), and the material saved drops on each solid insulation, so by by seal of the present invention, advantageously providing obvious joint space-efficient solution.This is for the high voltage direct current transmission assembly, and for example transformer is favourable because the steric requirements existed due to structural predesignate very narrow and small.By by seal of the present invention, for example taking full advantage of better the space existed between transformer coil.Simultaneously, for seal, although structure space reduces to form higher breakdown strength, this advantageously improves the job security of relevant high voltage direct current transmission assembly.
The high voltage direct current transmission component understand is this assembly, and this assembly is used for the transmission of high-voltage direct current electricity and comprises the element of drainage.Especially at this, need transformer or choke valve as the high voltage direct current transmission assembly.Certainly, also need different high voltage direct current transmission assemblies to be electrically connected to.Other high voltage direct current transmission assembly is in these connecton layouts or insulating sleeve, to pass the burble point of housing parts, and other high voltage direct current transmission assembly is housed in housing parts.Except high voltage direct current to be guided, alternating current also for example appears in transformer and choking-winding.By high voltage direct current transmission assembly of the present invention, should be suitable for transmitting the high voltage direct current of 100kV at least, preferably be suitable for transmitting the high voltage direct current more than 500kV.
Electricalresistivityρ at compound
CompBe up to 5 * 10
13During Ω m, also occur in to a greater degree on transformer oil by voltage drop, can advantageously utilize well described, for the important effect of removing cellulosic material load of the present invention.In order to utilize this effect, people also can be advantageously by the electricalresistivityρ of compound
CompBe set as the electricalresistivityρ of transformer oil
o1 to 20 times.Particularly advantageously can stipulate the electricalresistivityρ of compound
CompThe resistivity that is equivalent to transformer oil by the order of magnitude.By the order of magnitude meaning, be the electricalresistivityρ of compound
CompThe highest and resistivity transformer oil differ an order of magnitude (that is to say the highest differ 10 times).
The electricalresistivityρ
o, ρ
pAnd ρ
CompGround relevant with the present invention, should be respectively in room temperature with existingly measure under with reference to field intensity 1kV/mm.Under this condition, the electricalresistivityρ
o10
12To 10
13Between Ω m.But be noted that the electricalresistivityρ of transformer oil
oUnder by stronger load provided by the invention, reduce or rather by the voltage descended on transformer oil.Therefore, in the embodiment also further described below, the electricalresistivityρ in transformer oil
oFrom 10
12Ω m rises.
By another kind of structural design regulation of the present invention, the wall thickness classification of the adjacent solid insulation of insulating segment, wherein, solid insulation has maximum wall thickness in the electric field equipotential surface is compared the insulating segment zone of other zones of insulating segment leaning on each other the most closely.As a supplement or alternatively can advantageously stipulate equally, the resistivity classification of the adjacent solid insulation of insulating segment, wherein, solid insulation has minimum resistivity in the electric field equipotential surface is compared the insulating segment zone of other zones of insulating segment leaning on each other the most closely.The zone that equipotential surface is leaned on the most closely each other generally is present in the insulating segment end near high voltage direct current transmission assembly to be insulated.If this assembly is transformer coil, insulating segment is initial with inner most solid insulation, and the equipotential surface of electric field is also leaned on the most closely each other herein.Insulating segment also passes through one group in the situation that transformer coil inside and outside other nested solid insulations restrictions with one heart.But this insulating segment is the distance between equipotential surface by comparison in larger zone also.
The distribution of electric field strength is advantageously considered in the classification of the wall thickness of adjacent solid insulation or the resistivity of adjacent solid insulation, so that materials'use can be optimized respectively on the field intensity of part existence.By this way, can advantageously optimize the wall thickness of solid insulation on whole insulating segment, this is conducive to save structure space the largelyst.If additionally differently set the resistivity of solid insulation, for example can save the impregnated material for solid insulation, reduce thus material cost.
The use possibility favourable for seal for example is, is designed for the winding insulation device of transformer coil or choking-winding.These coils on its outer peripheral face by the solid insulation insulation of the cylinder form that for example formed by press board.In the end region of coil, be provided with dihedral ring and the cover plate of same design wall-forming shape solid insulation.All these parts have benefited from having by of the present invention a structural design of comparing the resistivity that untreated cellulosic material reduces, therefore can advantageously reduce the wall thickness of all these independent solid insulations.
In addition advantageously, the seal for the burble point of the connecton layout of high voltage direct current transmission assembly surrounds connecton layout itself or has the insulating sleeve be used to the electrode in the housing that is connected to the high voltage direct current transmission assembly.At this, also use the solid insulation that can advantageously be configured with the wall shape that more thin-walled is thick.This has simplified connecton layout and the burble point be attached thereto and the layout of insulating sleeve, because the space environment in the housing parts of high voltage direct current transmission assembly is normally narrow and small.
The accompanying drawing explanation
Following other details of the present invention are described with reference to the accompanying drawings.Identical or corresponding figure elements indicates respectively and therefore only repeatedly sets forth the difference before each accompanying drawing with identical Reference numeral.In accompanying drawing:
Fig. 1 simply illustrates the cross section by insulating segment, and its transformer oil of one group of alternating sequence and solid insulation of pressing the embodiment of seal of the present invention by conduct forms, and
Fig. 2 is the section for another embodiment of the high-voltage dc transmission piezoelectric transformer of packing into by seal of the present invention.
Embodiment
Electric insulation section 18 by Fig. 1 generally is comprised of the layer of a plurality of cellulosic materials 19, has oil reservoir 20 between these layers.Cellulosic material 19 is also wet with oil immersion, and this is not shown specifically in Fig. 1.For this reason, in Fig. 1, the visible macerate 11 in the inside of cellulosic material.By seal shown in Figure 2, for example in transformer, surround winding used herein, this winding must outside and electrically insulated from one another.
When having alternating voltage, the electric insulation of transformer must prevent electrical breakdown under working condition.In this case, the insulation characterisitic of insulating barrier is relevant with the permittivity of the component of insulating barrier.For oil, electric permittivity epsilon
oBe about 2, the electric permittivity epsilon of cellulosic material
pBe 4.Therefore, while under requiring alternating voltage, insulating, be the voltage U of load acquisition on oil of each insulation component
oIt is approximately the voltage U on cellulosic material
pTwice.If the use nano-complex, wherein, cellulosic material 19 is by the present invention's dipping, and macerate 11 does not affect at the voltage by insulating material of the present invention and distributes, because electric permittivity epsilon
BNNTBe about equally 4 and the therefore electric permittivity epsilon of impregnated cellulosic material
CompAlso be about 4.Therefore, even when by the present invention, insulating, act on the voltage U on oil
oAlso be about the voltage U be formed on nano-complex (cellulosic material)
CompTwice.
Simultaneously, when having direct voltage, in the high voltage direct current transmission assembly, the breakdown strength of insulating material is important.Therefore, the voltage certainly existed on each insulation component distributes not relevant with permittivity, and relevant with the resistivity of each component.The electricalresistivityρ of oil
o10
13To 10
12Between Ω m.What consider is, carries out the voltage drop of greater part in order to alleviate the load of the cellulosic material in oil and the resistivity of oil reduces when having voltage by the present invention, or rather, as shown in Figure 1, the electricalresistivityρ
oFrom 10
12Ω m rises.Correspondingly, the ρ of cellulosic material
pExceed three orders of magnitude and be 10
15Ω m.This causes, when having direct voltage, and the voltage U on oil
oFor the voltage U on cellulosic material
pOne thousandth (suppose ρ
o=10
13During Ω m, be at least one of percentage to one of five percentages).The danger that this imbalance is hidden is, in when to insulating material, applying direct voltage, causing cellulosic material puncture and electric insulation malfunctioning.
The macerate 11 of introducing cellulosic material 19 by the present invention for example can by BNNT form and by the BNNT bed of material formed by PEDOT:PSS that is applicable to and may the time by the dopant material that additionally doping has its resistivity (between 0.1 and 1000 Ω m) to BNNT, regulate in this wise, make cellulosic material ρ
pResistivity decreased.This also realizes by unique use PEDOT:PSS or unique use BNNT.Therefore, can be by the electricalresistivityρ by compound of the present invention
CompBe adjusted near the electricalresistivityρ
oAnd approximate in the ideal case this electricalresistivityρ
o.Work as the electricalresistivityρ
CompBe up to 5 * 10
13During Ω m, be formed at the voltage U on oil
oBy the order of magnitude in the voltage U be formed on compound
CompScope in, in order to regulate the voltage of the compensation in insulating material, distribute.Advantageously improve thus the breakdown strength of insulating material, because the load of cellulosic material obviously reduces.
Visible high-voltage dc transmission piezoelectric transformer in Fig. 2.It is arranged in the housing also referred to as fuel tank 21.In addition, show high-tension coil and low-voltage coil, their winding 22,23 is visible in Fig. 2.For sight line is clear, transformer core 14 only simply illustrates.
For winding 22, by field wire 33, electric field is shown, this field wire extends on the equipotential surface of electric field.This electric field is subject to the impact of the different elements of seal, and these elements also have graded insulation ring 24,25 as element, the cylindrical solid insulation part 26 consisted of press board and the dihedral ring 27 consisted of press board equally. Shading ring 24,25 has with the core 28 of metal surface 29 and paper roll 30.In addition, inner space 31 is filled with transformer oil, so transformer oil also flows in the gap 32 between each element of seal and fills up this gap 32.In addition, electric field line 33 also passes the thrust ring 34 of being made by blook board (Blockspan).Therefore, press decline of the present invention by the resistivity of cellulosic material, also can change thrust ring 34, so that the electric field that impact forms in this zone.Thrust ring 34 jointly guarantees together that with winding platform unshowned, made and supported equally winding 22,23 by blook board all parts mechanically are bonded together (comprising solid insulation).Within the scope of the invention, thrust ring 34 and unshowned winding platform also can be understood as the element of insulating segment.
Being bonded together of each assembly machinery is not shown specifically in Fig. 2.In addition, replace the dihedral ring 27 used, also use in a not shown manner annular cover plate, this cover plate surrounds shading ring 24,25 on the side back to winding 22,23.
By the present invention, the thickness of cylindrical solid insulation part 26 and dihedral ring 27 reduces.Therefore thus, can save structure space, because the width in gap 32 remains unchanged and can reduce the width of scatter channel 35.Thus, for by transformer of the present invention design structurally, having increased gap.Especially transformer can design to obtain the saving space.This is designed for more and more higher voltage range for the trend presented now, and the high voltage direct current transmission assembly that especially surpasses 1000kV is particular importance, and wherein, seal is more and more between consumption.On the other hand, exist for the maximum sized of high voltage direct current transmission assembly and predesignate, this high voltage direct current transmission assembly preferably also should be by orbit transports.
Claims (11)
1. one kind for the high voltage direct current transmission assembly, especially the seal of transformer or choke valve, it comprises solid insulation (26 a series of wall shapes, that made by cellulosic material, 27), between these solid insulations, be provided for the gap (32) of transformer oil and they form insulating segment together with transformer oil, it is characterized in that described solid insulation (26,27) be designed to the compound formed by processed cellulosic material (19)
-in described cellulosic material, have the electricalresistivityρ who compares described untreated cellulosic material (19)
pThe particle of less resistivity (11) disperses with the concentration higher than percolation threshold, and/or
-in described cellulosic material, have the electricalresistivityρ who compares untreated cellulosic material (19)
pThe network interconnected of the conducting polymer of less resistivity passes described compound,
And the wall thickness of solid insulation (26,27) is compared required wall thickness when replacing compound to use relevant untreated cellulosic material and is reduced.
2. by seal claimed in claim 1, it is characterized in that the electricalresistivityρ of described compound
CompBe up to 5 * 10
13Ω m.
3. by seal claimed in claim 2, it is characterized in that the electricalresistivityρ of described compound
CompElectricalresistivityρ for described transformer oil
01 to 20 times.
4. by seal claimed in claim 2, it is characterized in that the electricalresistivityρ of described compound
CompThe resistivity that is equivalent to transformer oil by the order of magnitude.
5. by one of aforementioned claim described seal, it is characterized in that, the wall thickness of described solid insulation (26,27) is compared needed wall thickness when replacing described compound to use relevant untreated cellulosic material and is reduced at least 25%.
6. by the described seal of one of claim 1 to 4, the wall thickness of described solid insulation (26,27) is 1mm and maximum 3mm at least.
7. by one of aforementioned claim described seal, it is characterized in that, the adjacent solid insulation (26 of described insulating segment, 27) wall thickness classification, wherein, described solid insulation has maximum wall thickness in the electric field equipotential surface is compared the insulating segment zone of other zones of insulating segment leaning on each other the most closely.
8. by one of aforementioned claim described seal, it is characterized in that, the adjacent solid insulation (26 of described insulating segment, 27) resistivity classification, wherein, described solid insulation has minimum resistivity in the electric field equipotential surface of described insulating segment is compared the zone of other zones of insulating segment leaning on the most closely.
9. by one of aforementioned claim described seal, it is characterized in that, described seal is designed for the winding insulation device of transformer coil (22,23) or choking-winding.
10. by one of aforementioned claim described seal, it is characterized in that, described seal surrounds the burble point for the connecton layout of high voltage direct current transmission assembly.
11. by one of aforementioned claim described seal, it is characterized in that, described seal surrounds has the insulating sleeve be used to the electrode on the wire in the housing that is connected to the high voltage direct current transmission assembly.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102011008454.1 | 2011-01-07 | ||
| DE102011008454A DE102011008454A1 (en) | 2011-01-07 | 2011-01-07 | Isolation arrangement for a HVDC component with wall-like solid barriers |
| PCT/EP2011/074085 WO2012093053A1 (en) | 2011-01-07 | 2011-12-27 | Insulating assembly for an hvdc component having wall-like solid barriers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103415894A true CN103415894A (en) | 2013-11-27 |
| CN103415894B CN103415894B (en) | 2016-11-02 |
Family
ID=45497966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201180069123.5A Expired - Fee Related CN103415894B (en) | 2011-01-07 | 2011-12-27 | The seal for D.C. high voltage transmission assembly with wall-like solid insulation |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2661755B1 (en) |
| CN (1) | CN103415894B (en) |
| BR (1) | BR112013017448B1 (en) |
| DE (1) | DE102011008454A1 (en) |
| WO (1) | WO2012093053A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102013205585A1 (en) * | 2013-03-28 | 2014-10-16 | Siemens Aktiengesellschaft | Cellulosic material with impregnation and use of this cellulosic material |
| US20170229207A1 (en) * | 2014-09-26 | 2017-08-10 | Momentive Performance Materials Inc. | Lamination composite of boron nitride in paper for transformer insulation |
| AT518664B1 (en) * | 2016-04-22 | 2017-12-15 | Trench Austria Gmbh | HVDC air choke coil and method of manufacture |
| DE102017208950A1 (en) * | 2017-05-29 | 2018-11-29 | Siemens Aktiengesellschaft | Shield ring and / or pitch compensation for a transformer coil |
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- 2011-12-27 BR BR112013017448-0A patent/BR112013017448B1/en not_active IP Right Cessation
- 2011-12-27 WO PCT/EP2011/074085 patent/WO2012093053A1/en active Application Filing
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Also Published As
| Publication number | Publication date |
|---|---|
| BR112013017448A2 (en) | 2016-10-04 |
| WO2012093053A1 (en) | 2012-07-12 |
| EP2661755B1 (en) | 2018-01-31 |
| DE102011008454A1 (en) | 2012-07-26 |
| BR112013017448B1 (en) | 2020-06-02 |
| EP2661755A1 (en) | 2013-11-13 |
| CN103415894B (en) | 2016-11-02 |
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