WO2016101988A1 - Formulations composites pour isolation de courant continu - Google Patents

Formulations composites pour isolation de courant continu Download PDF

Info

Publication number
WO2016101988A1
WO2016101988A1 PCT/EP2014/079075 EP2014079075W WO2016101988A1 WO 2016101988 A1 WO2016101988 A1 WO 2016101988A1 EP 2014079075 W EP2014079075 W EP 2014079075W WO 2016101988 A1 WO2016101988 A1 WO 2016101988A1
Authority
WO
WIPO (PCT)
Prior art keywords
insulation material
conductivity
insulation
material according
less
Prior art date
Application number
PCT/EP2014/079075
Other languages
English (en)
Inventor
Lejun QI
Tao Yu
Jiansheng Chen
Yibo Zhang
Delun MENG
Chau-Hon HO
Jens Rocks
Original Assignee
Abb Technology Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Abb Technology Ag filed Critical Abb Technology Ag
Priority to PCT/EP2014/079075 priority Critical patent/WO2016101988A1/fr
Publication of WO2016101988A1 publication Critical patent/WO2016101988A1/fr

Links

Classifications

    • 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
    • H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/36—Silica
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/003—Additives being defined by their diameter
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K2201/00—Specific properties of additives
    • C08K2201/002—Physical properties
    • C08K2201/006—Additives being defined by their surface area

Definitions

  • the present invention relates to an insulation material for a DC electrical component suitable for insulating High Voltage Direct Current (HVDC). Further, the present invention refers to a DC electrical component such as a cable, a bushing or a cable joint comprising the inventive insulation material. Also, the present invention is concerned with the use of the insulation material for DC electrical current.
  • HVDC High Voltage Direct Current
  • HVDC High Voltage Direct Current
  • DC insulation materials in particular DC insulation materials since many AC insulation materials cannot be used for DC.
  • significant leakage currents can flow from the DC equipment such as a cable into the surrounding environment.
  • Such leakage currents give rise to significant power loss, especially when the conductivity is too high within the insulation material, as well as to heating of the electrical insulation.
  • the heating of the insulation can increase the leakage current due to the reduction of the resistance with increasing temperature and can further lead to significant increase of conductivity of the insulation material.
  • these power losses and possible thermal runaways are predominant in HVDC power systems and do rather less occur with AC the insulation material should provide specific properties that fit for the requirements for application in DC systems.
  • an insulation material for a DC electrical component is suggested, the insulation material being a polymer composition comprising
  • the inorganic filler comprises group 13 and/or 14 oxide particles.
  • the inorganic filler herein comprises at least one of group 13 and 14 oxide particles, preferably of the general formula M x O n , wherein x is 1, 2 or 3 and n is 1, 2, 3 or 4.
  • the at least one of group 13 and 14 element for the oxide particles can in principle be selected from the group consisting of B, Al, Ga, In, Th, Si, Ge, Sn and Pb, representing M in the above stated general formula M x O n .
  • the inorganic filler is or substantially consists of such group 13 or 14 oxide particles.
  • the oxide particles are selected from AI2O 3 and/or S1O2 or at least one of AI2O 3 and Si0 2 .
  • S1O2 can be suitably used in different polymorphic forms such as quartz, seifertite, stishovite, and coesite.
  • the inorganic filler is AI2O 3 .
  • Alumina can be suitably used in all three modifications ⁇ -, ⁇ - and ⁇ - ⁇ 1 2 ⁇ 3.
  • the inorganic filler can further be suitably used with an average diameter of up to 10 ⁇ , preferably between 10 nm and 5 ⁇ , more preferably between 20 nm and 3 ⁇ and most preferably between 100 nm and 2 ⁇ .
  • the inorganic filler can comprise group 13 and/or 14 oxide micro- and nanoparticles, such as micro- and nano-alumina and/or micro- and nano-silica.
  • the inventors have particularly found that temperature stable DC conductivity of the herein suggested insulation material can be observed over a wide range of average diameters as specified above.
  • average diameters mean that the diameters are measured on an irregular bulk and are then commonly averaged. The diameter is typically measured through the center of the particle where the shortest distance between two points on opposite sides of the particle can be assigned. Additionally, the average diameter was taken as correctly measured when particles were purchased with a specific given diameter in the meaning of particle size.
  • the inorganic filler can further be provided as particles in the form of a powder having a BET surface area of at least 3 m 2 /g, preferably having a BET surface area in the range of 3 m 2 /g to 50 m 2 /g, preferably in the range of 3 m 2 /g to 100 m 2 /g, and more preferably in the range of 3 m 2 /g to 150 m 2 /g.
  • the amount of inorganic filler particles can advantageously lie in the range of 0.1 wt% to 10 wt%, in particular of 0.25 to 3 wt%.
  • the insulation material as suggested herein can comprise more than one sort of group 13 and group 14 oxide particles.
  • the polymeric composition can comprise only one sort of group 13 and 14 particles, but also a combination of two, three, four or more sorts of group 13 and group 14 oxide particles.
  • inorganic fillers comprising group 13 and/or 14 oxide particles can lead to a temperature stable reduction in conductivity, particularly stable at elevated temperatures.
  • This temperature stable reduction in conductivity is particularly achieved when using alumina and/or silica, particularly micro- and nano- alumina and/or micro- and nano-silica.
  • group 13 and/or 14 oxide particles can lead to this beneficial temperature stable reduction in conductivity. Such behavior could not have been observed for MgO particles.
  • thermally stable conductivity as specified herein is particularly advantageous as for example in HVDC cables the generation of heat during current flow will not deteriorate the insulation properties of the insulation material.
  • using the insulation material as suggested herein minimizes power loss by leakage currents and possible thermal runaways since the conductivity remain stable upon heat exposure to the insulation material.
  • inorganic fillers as defined herein leads to a significant reduction of the DC conductivity without sacrificing other properties.
  • the addition of the fillers not only significantly decreases the electrical conductivity in comparison to the matrix without the addition of the inorganic filler material, but also surprisingly stabilizes the DC conduction current.
  • inorganic fillers as defined herein such as micro- and nano-alumina results in a decrease of DC conductivity when measured at an electrical field strength of 30 kV/mm and at a temperature of 70 °C by at least one order of magnitude. Such drastic reduction in the DC conductivity makes the material suitable for application in HVDC insulation products.
  • the addition of such fillers does not deteriorate other properties of the original matrix in that the addition does not affect the melting and crystallization temperature of the polymer material.
  • the elongation at break and the tensile strength are not at all influenced by the addition of an inorganic filler material, while the material may tend to show only a slightly higher rigidity. All deviations observed for the properties above fall within standard deviation. [0011] Without being bound to the following theory it is believed that the filler comprising group 13 and/or 14 oxide particles attract charges within the matrix and trap them. Thereby, the charges are hindered to further move through the matrix and additionally reject and repel following charges once trapped. As a result current flow is hampered.
  • the insulation material as specified above has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the temperature stable conductivity is less than 3.5xl0 "15 S/m.
  • a temperature stable conductivity also implies that the conductivity is upheld over a longer period of time without significant increase.
  • Temperature stable preferably also implies that the conductivity is essentially constant over a period of at least over 24 hours, more preferably at least over 100 hours, even more preferably at least 240 hours and most preferably for at least 21 days.
  • Essentially constant means that the measured conductivity at a pre-determined temperature and electric field does not change either in the form of an increase or in the form of a reduction.
  • Essentially constant further preferably means that the conductivity upon set condition changes by ⁇ 30%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 120 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 105 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 140 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength in the range from 10 to 40 kV/mm, preferably from 5 to 80 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 120 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 105 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 140 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength in the range from 10 to 40 kV/mm, preferably from 5 to 80 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material exhibits a temperature stable DC conductivity in that the DC conductivity is at 50 °C more than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% and less than or equal to 150%, preferably 140%, more preferably 130 %, even more preferably 120% and most preferably 110% of the conductivity at 100 °C with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%.
  • the insulation material exhibits a temperature stable DC conductivity in that the DC conductivity is constantly less than 4xl0 "15 S/m, preferably 3xl0 "15 S/m, at an electrical field strength of 30 kV/mm over the whole temperature range of 50 to 100 °C with a filler content in the range of 0.1 to 10 wt%, preferably in the range of 0.25 to 3 wt%, more preferably of 1 wt%, when measured on plates of the suggested insulation material having a thickness in the range of 0.1 to 5 mm, e.g. 0.5 to 1 mm over at least 24 hours.
  • the DC conductivity as referred to herein was measured according common procedures generally known by the skilled person.
  • the DC conductivity was measured as the steady state conductivity at 30 kV/mm on 1 mm thick plates for at least 24 hours at the specified temperature. If the temperature is not particularly specified, the DC conductivity is measured at 70 °C.
  • the herein suggested insulation material further has a DC conductivity when measured at an electrical field strength of 30 kV/mm and at a temperature of 70 °C of less than 8x10 " S/m, preferably of less than 5x10 " S/m, and more preferably of less than 3.5xl0 "15 S/m and even more preferably of less than 2xl0 "15 S/m.
  • Such conductivities can be detected over a long period of time, at least over 24 hours, preferably over at least 100 hours, preferably over at least 240 hours .
  • the polymer matrix of the suggested insulation material preferably is a thermoplastic polymer matrix.
  • the polymer matrix preferably the thermoplastic polymer matrix, can comprise or consist of any suitable material such as polyethylene, polypropylene, ethylene propylene rubber, poly-4-methylpentene, polyvinylchloride, polymethylmethacrylate, polystyrene, polyoxymethylene, polyethylenterephthalate or bisphenol-A-polycarbonate. But also other materials such as resins and rubber materials can be used.
  • the polymer matrix preferably the thermoplastic polymer matrix
  • Polypropylene based as used herein means the matrix consists of or comprises to a larger degree polypropylene or polypropylene-co-polymers, for instance at least 40% based on the total amount of the polymer matrix.
  • Polypropylene based further implies that the properties of the matrix are significantly influenced by the amount of polypropylene or polypropylene-co-polymers.
  • the polymer matrix preferably the thermoplastic polymer matrix
  • Polyethylene based as used herein means the matrix consists of or comprises to a larger degree polyethylene or polyethylene-co-polymers, for instance at least 40% based on the total amount of the polymer matrix.
  • Polyethylene based further implies that the properties of the matrix are significantly influenced by the amount of polyethylene or polyethylene-co-polymers.
  • the insulating matrix material may or may not be cross-linked.
  • Cross-linking could be achieved physically, for example by means of electron beaming, X-ray, or y- radiation; or achieved chemically.
  • the cross-linking agent could for example be dicumyl peroxide (DCP), a silane or another peroxide, and the cross- linking agent could for example occur in a concentration within the range of 0.1-2.2 wt%.
  • a cross-linked material is typically more mechanically stable at high temperatures than a material which has not been cross-linked.
  • the polymer matrix preferably the thermoplastic polymer matrix, comprises or consists of crosslinked polyethylene material (XLPE).
  • the polymer matrix may also be a blend of polymers and/or copolymers.
  • the polymer matrix comprises
  • first copolymer being an ethylene-propylene copolymer comprising from 40 to 99% by weight propylene and from 1 to 60% by weight ethylene, based on the total weight of the first copolymer, and
  • a second copolymer being a butylene-propylene copolymer
  • the second copolymer comprises from 5 to 50% by weight 1-butylene and from 20 to 95% by weight propylene, based on the total weight of the second copolymer, wherein the weight ratio of the first copolymer to the second copolymer ranges from 99:1 to 1:99, preferably 10:90 to 90: 10, more preferably 75:25 to 25:75 and most preferably 50:50.
  • the first copolymer has a suitable weight average molecular weight M w of 30000 g/mol to 1000000 g/mol. Accordingly, the first copolymer has a number average molecular weight M n of 5000 g/mol to 300000 g/mol.
  • the copolymer blend is understood to be a blend of at least one copolymer and one further component, e.g. a polymer.
  • the polymer blend comprises a first and a second copolymer with the same first polymer as specified above, but the second copolymer further comprises from 5 to 50% by weight by weight ethylene, based on the total weight of the second copolymer
  • the second copolymer consists of 1-butylene, propylene and ethylene, preferably from 5 to 50% by weight of 1-butylene, preferably from 20 to 85% by weight propylene, and preferably from 5 to 55% by weight ethylene, based on the total weight of the second copolymer.
  • the insulation material as suggested herein can further contain one or more optional additives selected from wetting/dispersing agent, plasticizer, antioxidant, light absorber, further additive(s), preferably less than 5% by weight for all above stated ingredients together based on the total weight of the insulation material.
  • the insulation material may comprise a dispersing agent to an amount of less than 5%, preferably less than 2% and most preferably less than 1% based on the total weight of the insulation material.
  • Suitable dispersing agents are stearate esters, phosphoric acid esters such as phosphoric acid dimethyl esters, glycerol trioleat, dibutyl amine, sulfanates, polyethylene glycol, stearic acid, citric acid and fish oils.
  • Such dispersing agents can be directly added into the formulation.
  • surface treatment in addition to dispersing chemicals can be applied in the formulation to further improve the dispersion the filler particle.
  • a suitable surface treating agent is for example hexamethyldisilazane (HMDS).
  • HMDS hexamethyldisilazane
  • Such surface treating agents can be used to couple the -OH polar groups on the particle surface.
  • Suitable antioxidant agent are selected from the group comprising or consisting of phenols, phosphites, B-blends, hydroxylamines, aromatic amines, thioethers, lactones, metal deactivators and hindered amines.
  • antioxidants are suitably selected from the group comprising or consisting of Irganox 1010 ® , Irganox B 225 ® , Irganox B215 ® , Irganox B 561 ® , Irgafos 38 ® , Irgafos 126 ® , Irgafos 168 ® , Irgastab FS 042 ® , Irganox PS 800 ® , Irganox PS 802 ® , Irganox MD 1024 ® , Santonox R ® and distearyl thiodipropionate.
  • the dispersion of filler particles in the polymer matrix the insulation material may comprise an antioxidant agent to an amount of less than 5%, preferably less than 2% and most preferably less than 1% based on the total weight of the insulation material.
  • the insulation material may additionally comprise a fiber reinforcing material, preferably continuous mineral or organic fibers, more preferably glass fibers and ceramic fibers, most preferably mineral fibers from aluminum oxide fibers, basalt fibers and glass fibers or aramide fibers and polyester fibers.
  • a fiber reinforcing material preferably continuous mineral or organic fibers, more preferably glass fibers and ceramic fibers, most preferably mineral fibers from aluminum oxide fibers, basalt fibers and glass fibers or aramide fibers and polyester fibers.
  • fibers of one or different kinds may be present in the inventive insulation material in an amount of up to 5% by weight, preferably, up to 3% by weight, more preferably up to 1% by weight based on the total weight of the insulation material.
  • the herein suggested insulation material can be produced by a method comprising the steps of a) combining at least one polymer material and one inorganic filler, wherein the inorganic filler comprises at least one of group 13 and 14 oxide particles, and
  • Suitable temperatures for polypropylene based matrix materials are in the range of 150 to 200 °C, preferably 165-190 °C. Compounding usually takes about 3 to 10 minutes, however it dependent on the temperature, the amount of materials to be compounded as well as on the nature on the material to be compounded. Further, the skilled person understands that the method also comprises a step of cooling the compounded composition to room temperature, preferably slowly by a regulated, e.g. stepwise decrease of the ambient temperature.
  • the method as described above is highly advantageous for the manufacture of insulation materials for DC electrical components as it is possible to provide a very homogeneous polymeric composite with filler particles which are well distributed within the polymeric matrix enabling efficient trapping of charges when DC current is applied on the insulation material. Moreover, by providing a very homogeneous distribution of fillers and possible additives the risk of local over-heating and so-called hot spots with damaging the material can be avoided as the heat distribution is likewise improved with the distribution of fillers and additives. Therefore, one aspect of the present invention is directed to an insulation material produced by the herein suggested method.
  • a DC electrical component for high voltage DC power transmission or distribution such as a cable, a bushing, or a cable joint
  • the DC electrical component comprising a conductor surrounded at least partially by an insulation layer of the insulation material as suggested herein.
  • a DC electrical component for high voltage DC power transmission or distribution is suggested, the DC electrical component comprising a conductor surrounded at least partially by an insulation layer of the insulation material comprising
  • an inorganic filler wherein the inorganic filler comprises at least one of group 13 and 14 oxide particles, and wherein the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%, and preferably wherein the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 120 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10% .
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 105 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength of 30 kV/mm, so that the DC conductivity at 25 °C deviates from the DC conductivity at 140 °C by less than or equal to 65%, preferably 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%.
  • the insulation material has a temperature stable DC conductivity when measured at an electrical field strength in the range from 10 to 40 kV/mm, preferably from 5 to 80 kV/mm, so that the DC conductivity at 50 °C deviates from the DC conductivity at 100 °C by less than or equal to 50%, preferably 40%, more preferably 30%, even more preferably 20% and most preferably 10%
  • the herein suggested DC electrical component being a cable, a bushing, or a cable joint further comprises at least one of the following (al) to (a3):
  • the insulation layer has a thickness of more than 10 mm, preferably more than 20 mm and more preferably more than 30 mm.
  • a cable comprising the insulation material as herein suggested can be rated for high DC voltages, for example voltages of 150 kV, or higher.
  • the design of an HVDC cable product in terms of insulation thickness and rated voltage can be such that the radial electric field in the insulation layer tolerates an electrical field exceeding 10 MV/m at the rated voltage of the cable product, and for many applications, such that the radial electric field in the insulation layer tolerates an electrical field exceeding 25 MV/m at the rated voltage.
  • the use of the herein suggested insulation material for a DC electrical component is suggested.
  • the use of the insulation material for insulating of a cable, a bushing or a cable joint is suggested.
  • TP fillers and matrix
  • the fillers and matrix (TP) were firstly compounded by a torque rheomixer.
  • the filler content was 1 wt%.
  • the compounding was completed at 185-190 °C for 5 minutes.
  • the mixtures were hot pressed into thin plaques (0.1 mm and 0.5 mm in thickness) for dielectric measurements (DC conductivity and breakdown strength).
  • DC conductivity and breakdown strength Some of the mixture were also inject molded into dumbbell samples for tensile tests.
  • TP can typically be any thermoplastic polymer which suitably melts at elevated temperatures, generally higher than 110 °C, and can be extruded, processes and well blended with fillers as suggested herein.
  • suitable polymers are polyethylene, polypropylene, polybutylene, cross-linked or not, co-polymers thereof and blends of such polymers or co-polymers.
  • thermoplastic polymer blends consisting of a first copolymer being a common ethylene-propylene-copolymer, which was mixed with a common butylene-propylene copolymer blend. Different ratios in the range of 20:80 to 80:20 of first and second copolymer were used for which similar results were obtained.
  • Suitable polymers which could be used for the experiments below are Borclear RB707CF ® , Borclear RB709CF ® , Bormed SC876CF ® , Bormed RE816CF ® and Bormed RD808CF ® derivable from Borealis; Versify 4000 ® , Engage 8540 ® , Engage ENR 7256 ® , Elite 5960G ® , Infuse 9100 ® derivable from Dow Chemicals; Purell EP274P ® , Adflex Q100F ® , Koattro KT AR05 ® derivable from Lyondell Basell; Mosten MP 720 ® , Mosten EP 501 ® derivable from Unipetrol.
  • HMDS hexamefhyldisilazane
  • the sample thickness is around 0.5 mm.
  • the applied voltage was lOkV or 15 kV, meaning an electric field of 20 kV/mm or 30 kV/mm.
  • the temperature was 70 °C.
  • the current through the plaques was recorded continuously by a picoammeter. The experiments last for 100 hours. The currents after 100 hours were used to calculate the conductivity.
  • Tm Melting temperature
  • Tc crystallization temperature

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Organic Insulating Materials (AREA)

Abstract

La présente invention concerne un matériau isolant pour un composant électrique à C.C., apte à isoler le courant continu haute tension (CCHT). L'invention concerne en outre un composant électrique à C.C. tel qu'un câble, une bague ou un joint de câble comprenant le matériau d'isolation selon l'invention. L'invention concerne par ailleurs l'utilisation du matériau d'isolation pour isoler le courant électrique continu.
PCT/EP2014/079075 2014-12-22 2014-12-22 Formulations composites pour isolation de courant continu WO2016101988A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/079075 WO2016101988A1 (fr) 2014-12-22 2014-12-22 Formulations composites pour isolation de courant continu

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2014/079075 WO2016101988A1 (fr) 2014-12-22 2014-12-22 Formulations composites pour isolation de courant continu

Publications (1)

Publication Number Publication Date
WO2016101988A1 true WO2016101988A1 (fr) 2016-06-30

Family

ID=52391903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/079075 WO2016101988A1 (fr) 2014-12-22 2014-12-22 Formulations composites pour isolation de courant continu

Country Status (1)

Country Link
WO (1) WO2016101988A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336858A4 (fr) * 2015-08-10 2018-08-22 Sumitomo Electric Industries, Ltd. Câble pour courant continu ainsi que procédé de fabrication de celui-ci, et composition
CN111052265A (zh) * 2017-07-31 2020-04-21 陶氏环球技术有限责任公司 用于电线和电缆绝缘层和护套层的可湿气固化组合物
JP2020132819A (ja) * 2019-02-25 2020-08-31 住友電気工業株式会社 樹脂組成物、無機充填剤、直流電力ケーブル、および直流電力ケーブルの製造方法
EP3607563A4 (fr) * 2017-04-05 2020-11-18 ABB Schweiz AG Matériau d'isolation pour composant électrique à courant continu
WO2021097658A1 (fr) * 2019-11-19 2021-05-27 南京先进生物材料与过程装备研究院有限公司 Matériau isolant en polyéthylène pour câble à courant continu haute tension
US20220306831A1 (en) * 2019-08-30 2022-09-29 Dow Global Technologies Llc Photovoltaic encapsulant films comprising fumed alumina
US20220411611A1 (en) * 2019-08-30 2022-12-29 Dow Global Technologies Llc Polyolefin compositions having improved electrical properties

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255657A1 (fr) * 1986-08-04 1988-02-10 Siemens Aktiengesellschaft Isolant électrique
WO2006008422A1 (fr) * 2004-07-13 2006-01-26 Areva T & D Sa Procede de fabrication d'un isolateur pour une utilisation en haute tension
WO2011128147A1 (fr) * 2010-04-14 2011-10-20 Borealis Ag Composition polymère réticulable et câble aux propriétés électriques avantageuses
US20120012362A1 (en) * 2010-07-13 2012-01-19 Ls Cable Ltd. Dc power cable with space charge reducing effect

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0255657A1 (fr) * 1986-08-04 1988-02-10 Siemens Aktiengesellschaft Isolant électrique
WO2006008422A1 (fr) * 2004-07-13 2006-01-26 Areva T & D Sa Procede de fabrication d'un isolateur pour une utilisation en haute tension
WO2011128147A1 (fr) * 2010-04-14 2011-10-20 Borealis Ag Composition polymère réticulable et câble aux propriétés électriques avantageuses
US20120012362A1 (en) * 2010-07-13 2012-01-19 Ls Cable Ltd. Dc power cable with space charge reducing effect

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3336858A4 (fr) * 2015-08-10 2018-08-22 Sumitomo Electric Industries, Ltd. Câble pour courant continu ainsi que procédé de fabrication de celui-ci, et composition
US10643763B2 (en) 2015-08-10 2020-05-05 Sumitomo Electric Industries, Ltd. Direct-current cable, composition and method of manufacturing direct-current cable
EP3607563A4 (fr) * 2017-04-05 2020-11-18 ABB Schweiz AG Matériau d'isolation pour composant électrique à courant continu
US11342095B2 (en) 2017-04-05 2022-05-24 Hitachi Energy Switzerland Ag Insulation material for a DC electrical component
CN111052265A (zh) * 2017-07-31 2020-04-21 陶氏环球技术有限责任公司 用于电线和电缆绝缘层和护套层的可湿气固化组合物
CN111052265B (zh) * 2017-07-31 2021-11-26 陶氏环球技术有限责任公司 用于电线和电缆绝缘层和护套层的可湿气固化组合物
JP2020132819A (ja) * 2019-02-25 2020-08-31 住友電気工業株式会社 樹脂組成物、無機充填剤、直流電力ケーブル、および直流電力ケーブルの製造方法
US10818410B2 (en) 2019-02-25 2020-10-27 Sumitomo Electric Industries, Ltd. Resin composition, inorganic filler, direct-current power cable, and method of manufacturing direct-current power cable
US20220306831A1 (en) * 2019-08-30 2022-09-29 Dow Global Technologies Llc Photovoltaic encapsulant films comprising fumed alumina
US20220411611A1 (en) * 2019-08-30 2022-12-29 Dow Global Technologies Llc Polyolefin compositions having improved electrical properties
WO2021097658A1 (fr) * 2019-11-19 2021-05-27 南京先进生物材料与过程装备研究院有限公司 Matériau isolant en polyéthylène pour câble à courant continu haute tension

Similar Documents

Publication Publication Date Title
WO2016101988A1 (fr) Formulations composites pour isolation de courant continu
US10957467B2 (en) Coated overhead conductor
KR101408925B1 (ko) 반도전성 조성물과 절연 조성물을 이용하여 제조된 경량 전력 케이블
CA2937799C (fr) Procedes de formation de cables dotes de revetements ameliores
AU2012314162B2 (en) Electric element including a layer of a polymeric material with electrical conductivity gradient
JP6092481B2 (ja) ケーブルの絶縁体のための熱可塑性ブレンド組成物
US9183969B2 (en) Insulation composition for DC power cable and DC power cable prepared by using the same
US11257607B2 (en) Electric cable with improved temperature ageing resistance
KR102664628B1 (ko) 반도전성 차폐 조성물
KR101732723B1 (ko) 불소 실리콘 엘라스토머 조성물, 이를 이용하여 제조된 절연체, 및 이를 포함하는 전선 및 케이블
Hong et al. Polypropylene‐based soft ternary blends for power cable insulation at low‐to‐high temperature
WO2014000820A1 (fr) Composition d'isolation pour des applications de courant électrique
JP2017525084A (ja) 送電ケーブル
EP3033390B1 (fr) Formulation pour isolation des cables
US20200283606A1 (en) Cable comprising an easily peelable semi-conductive layer
Kamarudin et al. The effect of non-isothermal crystallization on the AC breakdown performance of polyethylene/silicon dioxide nanocomposites
KR20200077439A (ko) 적어도 하나의 가교 층을 포함하는 전기 케이블
US20240062930A1 (en) Electric cable comprising a thermoplastic insulating layer with improved electrical and mechanical performance
JPH10334738A (ja) 含ふっ素エラストマ被覆電線・ケーブル
EP3772069B1 (fr) Câble électrique présentant une conductivité thermique améliorée
EP4288983A1 (fr) Câble électrique présentant une conductivité thermique améliorée
CN115244627A (zh) 包括具有光滑表面的半导电层的电缆
JP2021535229A (ja) ポリ（２−アルキル−２−オキサゾリン）を有するポリオレフィン配合物
JPH10334736A (ja) 含ふっ素エラストマ被覆電線・ケーブル

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 14828158

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 14828158

Country of ref document: EP

Kind code of ref document: A1