JP2000090750A - Impregnated compound - Google Patents
Impregnated compoundInfo
- Publication number
- JP2000090750A JP2000090750A JP11258845A JP25884599A JP2000090750A JP 2000090750 A JP2000090750 A JP 2000090750A JP 11258845 A JP11258845 A JP 11258845A JP 25884599 A JP25884599 A JP 25884599A JP 2000090750 A JP2000090750 A JP 2000090750A
- Authority
- JP
- Japan
- Prior art keywords
- weight
- compound
- styrene
- cable
- viscosity
- Prior art date
- Legal status (The legal status 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 status listed.)
- Withdrawn
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
- H01B3/20—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils
- H01B3/22—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances liquids, e.g. oils hydrocarbons
-
- 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
- H01B3/28—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances natural or synthetic rubbers
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Insulating Materials (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、複数の浸透性テー
プの絶縁体を有する、電気ケーブルとりわけ高圧直流電
力ケーブル用の含浸コンパウンドに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an impregnating compound for electrical cables, especially high-voltage DC power cables, having a plurality of permeable tape insulators.
【０００２】[0002]
【従来の技術】このような物質含浸（mass impregnate
d）タイプのケーブル、すなわち粘性コンパウンドを含
浸させた紙で絶縁された金属シース付きケーブルは、地
下および海底の高圧直流（ＨＶＤＣ）伝送用にも設計さ
れる。2. Description of the Related Art Such material impregnation (mass impregnate)
Cables of type d), ie cables with a metal sheath insulated with a viscous compound impregnated with paper, are also designed for underground and submarine high voltage direct current (HVDC) transmission.
【０００３】ケーブルの作動中、ケーブルに負荷が加え
られるときおよび負荷が外されるときに、その絶縁体は
熱サイクルを受ける。負荷が加えられる間に、ケーブル
の導体、ケーブルの誘電体、ケーブルのシース、および
おそらくはケーブルの外装の損失によって引き起こされ
る加熱の結果として、含浸物質が膨張する。負荷が外さ
れている間にケーブルが冷めるときには、温度低下は導
体中で最大となり、含浸用の物質またはコンパウンドは
その中に吸い込まれ、周囲の物質／コンパウンドの絶縁
体を枯渇させ、真空の泡、および完全または少なくとも
部分的に空となる空間をその絶縁体内で生じさせる。前
記泡の部分の高い電界強度は、ケーブルの絶縁体内部で
放電を引き起こす。直流（ＤＣ）の場合には、単位時間
あたりの部分放電（ＰＤ）の回数が数十回少なくなるの
で、はるかに高い電気的ストレスまで物質含浸絶縁体を
使用することができる。それでも、このようなタイプの
ケーブルの電力の最大伝送を制限するのは、ケーブル冷
却中のＰＤである。[0003] During operation of the cable, the insulation undergoes thermal cycling when the cable is loaded and unloaded. While the load is applied, the impregnating material expands as a result of heating caused by loss of the cable conductors, cable dielectric, cable sheath, and possibly the cable sheath. When the cable cools while the load is unloaded, the temperature drop is greatest in the conductor and the impregnating material or compound is sucked into it, depleting the surrounding material / compound insulation and creating a vacuum bubble. , And completely or at least partially empty space within the insulator. The high electric field strength of the bubble part causes a discharge inside the insulation of the cable. In the case of direct current (DC), the number of partial discharges (PD) per unit time is reduced by several tens of times, so that the substance-impregnated insulator can be used up to a much higher electric stress. Nevertheless, it is the PD during cable cooling that limits the maximum transmission of power for these types of cables.
【０００４】より高い電圧用の物質含浸ケーブルの製造
に関するその他の制限要素は、製造プロセスに関連す
る。含浸手順は非常に時間がかかり、このプロセスは、
物質または含浸コンパウンドの含有量の低い領域を生み
出す可能性がある。ケーブルの切開から、ケーブルの絶
縁体中の領域が完全に含浸されないこともあることが確
認されている。このことが、知られているケーブルの絶
縁体のエネルギー伝送の制限を決めている。Another limiting factor in the production of material impregnated cables for higher voltages relates to the manufacturing process. The impregnation procedure is very time consuming and this process
It can create areas of low content of substances or impregnating compounds. It has been determined from cable incisions that areas in the cable insulation may not be completely impregnated. This sets limits on the energy transfer of the known cable insulation.
【０００５】ＰＣＴ ＷＯ９８／０１８６９出願から、
炭化水素ベースの流体への高分子の混合材を含む誘電性
流体が絶縁体に含浸した、開孔を備えた導体絶縁体を有
する電気装置が知られている。第一の低い温度範囲内で
は、この流体は粘性の高い弾性状態にあると記述されて
おり、第二のより高い温度範囲内では、この流体は粘性
の低い状態となり、第三の限定温度範囲では、この誘電
流体の粘性は、この粘性の低い状態と粘性の高い状態と
の間で変わるはずである。[0005] From the PCT WO 98/01869 application,
Electrical devices are known that have a conductor insulator with perforations in which the insulator is impregnated with a dielectric fluid containing a mixture of a polymer with a hydrocarbon-based fluid. Within the first lower temperature range, the fluid is described as being in a viscous, elastic state, and within the second, higher temperature range, the fluid is in a less viscous state, and the third limited temperature range Then, the viscosity of the dielectric fluid should change between this low viscosity state and the high viscosity state.
【０００６】先行するＰＣＴ ＷＯ９７／０４４６５出
願には、鉱油と、５００００〜１００００００の分子量
を有するポリスチレンと合成ゴムとの合成炭化水素ブロ
ック共重合体である油溶性高分子とを含む、油ベースの
電気絶縁コンパウンドが記載されている。[0006] The earlier PCT WO 97/04465 application discloses an oil-based electrical system comprising a mineral oil and an oil-soluble polymer which is a synthetic hydrocarbon block copolymer of polystyrene and synthetic rubber having a molecular weight of 50,000 to 1,000,000. An insulating compound is described.
【０００７】これと同時出願されたＰＣＴ ＷＯ９７／
０４４６６にも、非常に急勾配で変化する粘性の特徴を
有する含浸コンパウンドが記載されており、その粘性
は、最高のケーブル作動温度以下の温度では高く、それ
より高い温度では低い。[0007] PCT WO97 /
04466 also describes an impregnating compound with the characteristic of a very steeply changing viscosity, the viscosity being high at temperatures below the maximum cable operating temperature and low at higher temperatures.
【０００８】直流高圧ケーブルの問題、第一にこの種の
ケーブルの製造上の問題、第二に泡のない絶縁を保ち、
コンパウンド／物質が含浸した絶縁体内の放電による各
ケーブルの破損を防止する問題について、上述の従来技
術では、ケーブル作動温度を高くしながら「泡のない」
絶縁体にするには不十分であり、また製造コストを削減
しながら製造時間を短縮するにも不十分である。[0008] The problem of DC high voltage cables, firstly the problem of the manufacture of this type of cable, secondly the maintenance of bubble-free insulation,
Regarding the problem of preventing breakage of each cable due to discharge in the compound / substance impregnated insulator, the above-mentioned prior art technique is "bubble free" while increasing the cable operating temperature.
It is not enough to make it an insulator, and it is also not enough to shorten the manufacturing time while reducing the manufacturing cost.
【０００９】[0009]
【発明が解決しようとする課題】したがって、本発明の
目的は、Ｔａｎδ、抵抗率、絶縁破壊電圧の様な誘電特
性に優れ、良好な吸収特性を有する含浸コンパウンドを
提供することである。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an impregnating compound having excellent dielectric properties such as Tan δ, resistivity and dielectric breakdown voltage and having good absorption properties.
【００１０】本発明の第二の目的は、ケーブルの熱サイ
クル中にコンパウンド中にボイドが生じる可能性を低下
させることである。A second object of the present invention is to reduce the potential for voids in the compound during thermal cycling of the cable.
【００１１】本発明のさらに別の目的は、含浸温度を低
下させ、それに続いて製造時間を短縮し、製造コストを
節約することである。It is yet another object of the present invention to reduce the impregnation temperature and subsequently reduce production time and save production costs.
【００１２】[0012]
【課題を解決するための手段】したがって、本発明によ
れば、含浸コンパウンドは、少なくとも４０℃のケーブ
ル導体の作動温度以下では、２００〜７００Ｐａ・ｓの
ほぼ一定の高い粘性を有し、約７５℃〜１３０℃の温度
範囲では、０．１Ｐａ・ｓ未満の低い粘性を有する。Thus, according to the invention, the impregnating compound has a substantially constant high viscosity of 200 to 700 Pa.s, at least below the operating temperature of the cable conductor of at least 40.degree. It has a low viscosity of less than 0.1 Pa · s in a temperature range of from 0 ° C to 130 ° C.
【００１３】好ましくは、本発明によれば、含浸コンパ
ウンドは、７０℃のケーブル導体の作動温度以下では、
３００〜５００Ｐａ・ｓのほぼ一定の高い粘性を有し、
約９５℃〜１２５℃の温度範囲では、０．１Ｐａ・ｓ未
満の低い粘性を有する。Preferably, according to the invention, the impregnating compound has a temperature below the operating temperature of the cable conductor of 70 ° C.
It has an almost constant high viscosity of 300 to 500 Pa · s,
It has a low viscosity of less than 0.1 Pa · s in a temperature range of about 95 ° C to 125 ° C.
【００１４】したがって、例えば４℃〜５５℃のケーブ
ルの作動温度の範囲内の含浸物質の比較的一定の粘性
は、必然的にケーブルの絶縁体中でボイドまたは泡が生
じる可能性を低下させることになる。Thus, the relatively constant viscosity of the impregnating material, for example in the range of operating temperatures of the cable between 4 ° C. and 55 ° C., necessarily reduces the possibility of voids or bubbles in the cable insulation. become.
【００１５】本発明によるコンパウンドまたは含浸物質
は、８０〜９８重量％の鉱油、１〜１０重量％の熱可塑
性エラストマ、および１〜１０重量％のガス吸収剤から
なる。The compound or impregnated material according to the invention consists of 80 to 98% by weight of mineral oil, 1 to 10% by weight of a thermoplastic elastomer and 1 to 10% by weight of a gas absorbent.
【００１６】本発明によるコンパウンド中の鉱油は、２
５０〜５４０℃の間の沸点を有し、４０℃で２０〜３０
０ｃＳｔの間の粘性を有し、２５〜５０重量％の間の範
囲の芳香族炭化水素を含有する、水素添加ナフテン油で
あることが好ましい。The mineral oil in the compound according to the invention is 2
It has a boiling point between 50 and 540 ° C. and 20 to 30 at 40 ° C.
Preference is given to hydrogenated naphthenic oils having a viscosity between 0 cSt and containing aromatic hydrocarbons in the range between 25 and 50% by weight.
【００１７】本発明によって使用される熱可塑性エラス
トマは、１００００〜２５００００の間の分子量を有
し、スチレンの含有量が質量で２５〜３５％である、ス
チレン−エチレン−ブチレン−スチレン（ＳＥＢＳ）エ
ラストマである。The thermoplastic elastomer used according to the invention has a molecular weight of between 10,000 and 250,000 and a styrene content of 25 to 35% by weight of styrene-ethylene-butylene-styrene (SEBS) elastomer. It is.
【００１８】本発明は、上述の含浸コンパウンドまたは
物質のみに関するのではなく、このコンパウンド／物質
が含浸された絶縁体を有するケーブルにも関する。本発
明は、このようなケーブルを製造する方法にも関する。
本発明を用いれば、上述の特性と、３５０ｋＶ以上の電
圧で５００ＭＷ程度以上となる特別に高い有効伝達容量
（extra high effect transfer capacity）とを有する
ＨＶＤＣ電力ケーブルが得られる。The invention does not only relate to the impregnated compound or substance described above, but also to a cable having an insulation impregnated with this compound / substance. The invention also relates to a method for producing such a cable.
By using the present invention, an HVDC power cable having the above characteristics and an extra high effect transfer capacity of about 500 MW or more at a voltage of 350 kV or more can be obtained.
【００１９】本発明の上述の特徴とその他の特徴および
目的は、以下の本発明の実施形態の詳細な説明を、いく
つかのコンパウンドの詳細例および図面とともに考慮す
れば、明確に分かるであろう。The foregoing and other features and objects of the present invention will become apparent from the following detailed description of embodiments of the invention, when considered in conjunction with the several compound details and drawings. .
【００２０】[0020]
【発明の実施の形態】第１図に、ほぼ円形の断面を有す
る中央マルチワイヤ導体２を含む、ＨＶＤＣ電力ケーブ
ル１を概略的に示す。導体を取り囲む少なくとも一つの
絶縁層３は、導体の周りに巻き付けられた複数の浸透性
紙テープからなる。ほぼ円形の断面を有する少なくとも
一つの非浸透性シース４は、一つまたは複数の絶縁層３
を取り囲み、含浸コンパウンドは、導体内の全ての隙
間、各テープ層間の全ての隙間、およびテープ構造体自
体の中の全てのボイドをほぼ満たす。通常は、導体２の
上および金属シース４の下に、それぞれ半導体層５およ
び６もある。外部には、外装その他の保護層がある（図
示せず）。同一の非浸透性シース内に、二つ以上の絶縁
コアを配列することもできる。FIG. 1 schematically shows an HVDC power cable 1 including a central multi-wire conductor 2 having a substantially circular cross section. At least one insulating layer 3 surrounding the conductor comprises a plurality of permeable paper tapes wrapped around the conductor. At least one non-permeable sheath 4 having a substantially circular cross section is provided with one or more insulating layers 3.
And the impregnating compound substantially fills all gaps in the conductor, all gaps between each tape layer, and all voids in the tape structure itself. Normally, also above the conductor 2 and below the metal sheath 4, there are also semiconductor layers 5 and 6, respectively. Outside, there is an exterior and other protective layers (not shown). Two or more insulating cores can be arranged in the same non-permeable sheath.
【００２１】ケーブル絶縁システムの電気特性は、絶縁
のタイプおよびケーブル製造プロセスだけなく、とりわ
け含浸コンパウンドの選択にも依存する。ＨＶＤＣケー
ブルで使用されるこのようなコンパウンドは、低い誘電
損と、イオンボンバードメントを受けたときに水素ガス
を吸収する能力とを有さなければならず、さらに長期の
安定性を有さなければならない。The electrical properties of the cable insulation system depend not only on the type of insulation and the cable manufacturing process, but also, inter alia, on the choice of the impregnating compound. Such compounds used in HVDC cables must have low dielectric loss, the ability to absorb hydrogen gas when subjected to ion bombardment, and have long-term stability. No.
【００２２】本発明によって使用される、不可欠な特徴
を有するコンパウンドの例は、下記のようになる。Examples of compounds having the essential characteristics used by the present invention are as follows.
【００２３】コンパウンドＡ ８０〜９６重量％の、３３０℃を超える沸点を有し、約
３５重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、２〜１０重量％の、分子量１５００００のス
チレン−エチレン−ブチレン−スチレンのブロック共重
合体、および２〜１０重量％のジベンジルトルエンの異
性体混合物。Compound A 80 to 96% by weight of hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 35% by weight of aromatic hydrocarbons, 2 to 10% by weight, styrene having a molecular weight of 150,000 A block copolymer of ethylene-butylene-styrene and an isomer mixture of 2 to 10% by weight of dibenzyltoluene.
【００２４】このコンパウンドは、１００〜８０℃での
低い粘性、例えば１００℃での４０ｍＰａ・ｓと、５５
〜５０℃から０℃でのほぼ一定の粘性とを特徴とする。
０℃で、このコンパウンドは４５０Ｐａ・ｓの粘性を有
する。This compound has a low viscosity at 100-80 ° C., for example, 40 mPa · s at 100 ° C., 55
It is characterized by a nearly constant viscosity at ５０50 ° C. to 0 ° C.
At 0 ° C., this compound has a viscosity of 450 Pa · s.
【００２５】コンパウンドＢ ８５〜９６重量％の、３３０℃を超える沸点を有し、約
３５重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、２〜５重量％の、分子量２０００００のスチ
レン−エチレン−ブチレン−スチレンのブロック共重合
体、および２〜１０重量％のジベンジルトルエンの異性
体混合物。Compound B 85 to 96% by weight of a hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 35% by weight of aromatic hydrocarbons, 2 to 5% by weight of styrene with a molecular weight of 200,000 A block copolymer of ethylene-butylene-styrene and an isomer mixture of 2 to 10% by weight of dibenzyltoluene.
【００２６】この含浸コンパウンド／物質は、１２５〜
１１５℃で低い粘性を有し、７０〜６０℃から０℃でほ
ぼ一定の粘性を有する。The impregnated compound / material has a
It has low viscosity at 115 ° C and almost constant viscosity from 70-60 ° C to 0 ° C.
【００２７】コンパウンドＣ ８０〜９６重量％の、３３０℃を超える沸点を有し、約
４２重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、２〜１０重量％の、分子量１５００００のス
チレン−エチレン−ブチレン−スチレンのブロック共重
合体、および２〜１０重量％のジベンジルトルエンの異
性体混合物。Compound C 80-96% by weight, hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 42% by weight of aromatic hydrocarbons, 2-10% by weight, styrene of molecular weight 150,000, containing about 42% by weight of aromatic hydrocarbons A block copolymer of ethylene-butylene-styrene and an isomer mixture of 2 to 10% by weight of dibenzyltoluene.
【００２８】このケーブル含浸物質および以下の含浸物
質も、１００℃超の温度での非常に低い粘性と、６０〜
７０℃までの広い温度範囲内でのほぼ一定の粘性とを特
徴とする。The cable impregnating material and the following impregnating materials also have very low viscosities at temperatures above 100 ° C.,
It is characterized by an almost constant viscosity in a wide temperature range up to 70 ° C.
【００２９】コンパウンドＤ ９０〜９５重量％の、３３０℃を超える沸点を有し、約
４２重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、２〜６重量％の、分子量２０００００のスチ
レン−エチレン−ブチレン−スチレンのブロック共重合
体、および２〜４重量％のジベンジルトルエンの異性体
混合物。Compound D 90 to 95% by weight of hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 42% by weight of aromatic hydrocarbons, 2 to 6% by weight of styrene with a molecular weight of 200,000 -An ethylene-butylene-styrene block copolymer and 2-4% by weight of an isomer mixture of dibenzyltoluene.
【００３０】コンパウンドＥ ８０〜９５重量％の、２５０℃を超える沸点を有し、約
３０重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、３〜１０重量％の、分子量２０００００のス
チレン−エチレン−ブチレン−スチレンのブロック共重
合体、および２〜１０重量％のジベンジルトルエンの異
性体混合物。Compound E 80 to 95% by weight of hydrogenated naphthenic mineral oil having a boiling point above 250 ° C. and containing about 30% by weight of aromatic hydrocarbons, 3 to 10% by weight, styrene with a molecular weight of 200,000, A block copolymer of ethylene-butylene-styrene and an isomer mixture of 2 to 10% by weight of dibenzyltoluene.
【００３１】上述の含浸コンパウンドＥは、１００〜８
０℃で低い粘性を有し、５０〜４０℃から０℃でほぼ一
定の粘性を有する。The above impregnated compound E is 100 to 8
It has low viscosity at 0 ° C. and almost constant viscosity from 50-40 ° C. to 0 ° C.
【００３２】上記含浸コンパウンドの利点は、基本的に
下記のようになる。The advantages of the impregnating compound are basically as follows.
【００３３】これらの誘電特性は優れており、通常Ｔａ
ｎδは０．０７０、抵抗率は〜２×１０１１、絶縁破壊
電圧は６０ｋＶである。ガス吸収特性は高く、通常は毎
分１２〜１５ｍｍ３となる。These dielectric properties are excellent, and are usually
nδ is 0.070, the resistivity is up to 2 × 10 11 , and the dielectric breakdown voltage is 60 kV. Gas absorption properties are high, typically 12-15 mm 3 per minute.
【００３４】ケーブルの作動温度で含浸物質が比較的一
定の粘性であることにより、ケーブルが熱サイクルを受
ける場合にも、最も効果的な方法で、ボイドまたは泡が
生じる可能性が低下する。The relatively constant viscosity of the impregnating material at the operating temperature of the cable reduces the likelihood that voids or bubbles will form in the most efficient manner even when the cable is subject to thermal cycling.
【００３５】ゲル化点より前の低い粘性は、必然的にケ
ーブルの含浸温度を低下させ、その結果として、ケーブ
ル製造時間、すなわちケーブルの絶縁体に含浸するため
の時間を短縮することができる。The lower viscosity before the gel point necessarily lowers the impregnation temperature of the cable, and consequently can reduce the cable production time, ie the time for impregnating the cable insulation.
【００３６】本発明による上述の含浸コンパウンドＡ〜
Ｅから、コンパウンドＡおよびＢの特徴を第２図に示
す。この図から分かるように、コンパウンドＡの場合
は、４０℃以下の範囲で、約５００Ｐａ・ｓの高い粘性
が比較的一定であるが、約４５０Ｐａ・ｓのコンパウン
ドＢの粘性は、６５℃まで比較的一定となる。含浸時間
の短縮に限って言えば、粘性が低いことが含浸プロセス
では重要であるが、含浸物質の粘性を最小限に抑えなが
ら、同時に温度を可能な限り低くしなければならない。The above impregnated compounds A to A according to the invention
From E, the characteristics of compounds A and B are shown in FIG. As can be seen from the figure, in the case of Compound A, the high viscosity of about 500 Pa · s is relatively constant within a range of 40 ° C. or less, but the viscosity of Compound B of about 450 Pa · s The target is constant. As far as the impregnation time is concerned, low viscosity is important in the impregnation process, but the temperature must be as low as possible while minimizing the viscosity of the impregnated material.
【００３７】この図では、本発明によれば、コンパウン
ドＡは約９０℃で約０．０５Ｐａ・ｓの低い粘性を有
し、コンパウンドＢは約１１０℃でやはり約０．０５Ｐ
ａ・ｓの低い粘性を有することが示されている。変化の
傾き、すなわち両方の本質的な粘性の特徴（高／低）
は、急勾配である。In this figure, according to the present invention, compound A has a low viscosity of about 0.05 Pa · s at about 90 ° C. and compound B has a viscosity of about 0.05 P · s at about 110 ° C.
It has been shown to have a low viscosity of as. Slope of change, ie both intrinsic viscosity characteristics (high / low)
Is steep.
【００３８】本発明によるコンパウンドＡおよびＢの特
徴を表す図と、約１５０Ｐａ・ｓの「高い」粘性から開
始する通常使用される（ＲＵ）コンパウンドとを比較す
ると、「低い」粘性は、８０〜８５℃の温度で約０．６
Ｐａ・ｓとなる。「高い」粘性から「低い」粘性への変
化の傾きは、平坦である。Comparing the figures characterizing compounds A and B according to the invention with the commonly used (RU) compounds starting from a "high" viscosity of about 150 Pa.s, the "low" viscosity is between 80 and About 0.6 at 85 ° C
Pa · s. The slope of the change from "high" viscosity to "low" viscosity is flat.
【００３９】第２図のＮＨ曲線は、約３０００Ｐａ・ｓ
の「高い」粘性、および約６０℃での約０．０５Ｐａ・
ｓの「低い」粘性を有する、もうひとつの従来技術（Ｐ
ＣＴ／ＷＯ９７／０４４６５）を描くものである。しか
し、この場合の変化の傾きは非常に急勾配であり、その
高レベルの粘性から、ＮＨ曲線は急激にその勾配を変化
させる。したがって、従来技術によるコンパウンドは、
本発明の利点を得るのに必要な条件を満たさない。The NH curve shown in FIG.
"High" viscosity of about 0.05 Pa.
s "low" viscosity, another prior art (P
CT / WO97 / 04465). However, the slope of the change in this case is very steep, and from its high level of viscosity, the NH curve sharply changes its slope. Therefore, the compound according to the prior art is:
It does not meet the requirements necessary to obtain the advantages of the present invention.
【図１】高圧直流（ＨＶＤＣ）ケーブルを示す図であ
る。FIG. 1 illustrates a high voltage direct current (HVDC) cable.
【図２】いくつかの含浸コンパウンドの粘性の特徴を示
す概略図である。FIG. 2 is a schematic diagram showing the viscosity characteristics of some impregnating compounds.
１ ＨＶＤＣ電力ケーブル ２ 中央マルチワイヤ導体 ３ 絶縁層 ４ 非浸透性シース ５、６ 半導体層 DESCRIPTION OF SYMBOLS 1 HVDC power cable 2 Central multi-wire conductor 3 Insulation layer 4 Non-permeable sheath 5, 6 Semiconductor layer
Claims (14)
電気ケーブル、とりわけ高圧直流電力ケーブルのための
含浸コンパウンドであって、前記含浸コンパウンドが、
少なくとも４０℃のケーブル導体の作動温度以下では、
２００〜７００Ｐａ・ｓのほぼ一定の高い粘性を有し、
約７５℃〜１３０℃の温度範囲では、０．１Ｐａ・ｓ未
満の低い粘性を有することを特徴とする含浸コンパウン
ド。1. Having a plurality of permeable tape insulators,
An impregnating compound for an electric cable, especially a high-voltage DC power cable, wherein the impregnating compound comprises:
Below the operating temperature of the cable conductor of at least 40 ° C,
It has an almost constant high viscosity of 200 to 700 Pa · s,
An impregnating compound having a low viscosity of less than 0.1 Pa · s in a temperature range of about 75 ° C to 130 ° C.
ブル導体の作動温度以下では、３００〜５００Ｐａ・ｓ
のほぼ一定の高い粘性を有し、約９５℃〜１２５℃の温
度範囲では、０．１Ｐａ・ｓ未満の低い粘性を有するこ
とを特徴とする請求項１に記載の含浸コンパウンド。2. When the impregnated compound has an operating temperature of 70 ° C. or less at a cable conductor temperature of 300 to 500 Pa · s.
2. The impregnating compound according to claim 1, wherein the compound has a substantially constant high viscosity and a low viscosity of less than 0.1 Pa.s in a temperature range of about 95C to 125C.
重量％のガス吸収剤からなることを特徴とする請求項１
または２に記載の含浸コンパウンド。3. The impregnating compound comprises: 80 to 98% by weight of mineral oil, 1 to 10% by weight of a thermoplastic elastomer, and 1 to 10% by weight.
2. The method according to claim 1, wherein the gas absorbent is composed of a weight percent.
Or the impregnating compound according to 2.
有し、４０℃で２０〜３００ｃＳｔの間の粘性を有し、
２５〜５０重量％の間の範囲の芳香族炭化水素を含有す
る、水素添加ナフテン油であることを特徴とする請求項
３に記載の含浸コンパウンド。4. The mineral oil has a boiling point between 250 and 540 ° C., a viscosity at 40 ° C. between 20 and 300 cSt,
4. The impregnated compound according to claim 3, characterized in that it is a hydrogenated naphthenic oil containing aromatic hydrocarbons in the range between 25 and 50% by weight.
５００００の間の分子量を有し、スチレンの含有量が質
量で２５〜３５％である、スチレン−エチレン−ブチレ
ン−スチレン（ＳＥＢＳ）エラストマであることを特徴
とする請求項３に記載の含浸コンパウンド。5. The thermoplastic elastomer according to claim 1, wherein said thermoplastic elastomer is 10,000-2.
The impregnating compound according to claim 3, characterized in that it is a styrene-ethylene-butylene-styrene (SEBS) elastomer having a molecular weight of between 50,000 and a styrene content of 25-35% by mass.
性体混合物であることを特徴とする請求項３に記載の含
浸コンパウンド。6. The impregnating compound according to claim 3, wherein the gas absorbent is a mixture of isomers of dibenzyltoluene.
量％の、３３０℃を超える沸点を有し、約３５重量％の
芳香族炭化水素を含有する、水素添加ナフテン鉱油、 ２〜１０重量％の、分子量１５００００のスチレン−エ
チレン−ブチレン−スチレンのブロック共重合体、およ
び２〜１０重量％のジベンジルトルエンの異性体混合物
からなることを特徴とする請求項３から６のいずれか一
項に記載の含浸コンパウンド。7. The hydrogenated naphthenic mineral oil, wherein the impregnated compound has a boiling point of more than 330 ° C. and contains about 35% by weight of aromatic hydrocarbons, from 80 to 96% by weight, from 2 to 10% by weight. And a block copolymer of styrene-ethylene-butylene-styrene having a molecular weight of 150,000 and an isomer mixture of dibenzyltoluene in an amount of 2 to 10% by weight. Impregnating compound.
３５重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、 ２〜５重量％の、分子量２０００００のスチレン−エチ
レン−ブチレン−スチレンのブロック共重合体、および
２〜１０重量％のジベンジルトルエンの異性体混合物か
らなることを特徴とする請求項３から６のいずれか一項
に記載の含浸コンパウンド。8. The impregnated compound comprises: 85 to 96% by weight of a hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 35% by weight of aromatic hydrocarbons; 7. A styrene-ethylene-butylene-styrene block copolymer having a molecular weight of 200,000 and an isomer mixture of dibenzyltoluene of 2 to 10% by weight. Impregnating compound.
４２重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、 ２〜１０重量％の、分子量１５００００のスチレン−エ
チレン−ブチレン−スチレンのブロック共重合体、およ
び２〜１０重量％のジベンジルトルエンの異性体混合物
からなることを特徴とする請求項３から６のいずれか一
項に記載の含浸コンパウンド。9. The impregnated compound comprises: 80 to 96% by weight of a hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 42% by weight of aromatic hydrocarbons, 2 to 10% by weight. And a block copolymer of styrene-ethylene-butylene-styrene having a molecular weight of 150,000 and an isomer mixture of dibenzyltoluene in an amount of 2 to 10% by weight. Impregnating compound.
４２重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、 ２〜６重量％の、分子量２０００００のスチレン−エチ
レン−ブチレン−スチレンのブロック共重合体、および
２〜４重量％のジベンジルトルエンの異性体混合物から
なることを特徴とする請求項３から６のいずれか一項に
記載の含浸コンパウンド。10. The impregnated compound comprises: 90 to 95% by weight of a hydrogenated naphthenic mineral oil having a boiling point above 330 ° C. and containing about 42% by weight of aromatic hydrocarbons; 7. A styrene-ethylene-butylene-styrene block copolymer having a molecular weight of 200,000 and 2 to 4% by weight of an isomer mixture of dibenzyltoluene. Impregnating compound.
３０重量％の芳香族炭化水素を含有する、水素添加ナフ
テン鉱油、 ３〜１０重量％の、分子量２０００００のスチレン−エ
チレン−ブチレン−スチレンのブロック共重合体、およ
び２〜１０重量％のジベンジルトルエンの異性体混合物
からなることを特徴とする請求項３から６のいずれか一
項に記載の含浸コンパウンド。11. The impregnated compound comprises: 80 to 95% by weight of a hydrogenated naphthenic mineral oil having a boiling point above 250 ° C. and containing about 30% by weight of aromatic hydrocarbons; 7. A styrene-ethylene-butylene-styrene block copolymer having a molecular weight of 200,000 and an isomer mixture of dibenzyltoluene of 2 to 10% by weight. Impregnating compound.
導体を取り囲む少なくとも一つの絶縁層（３）と、 絶縁された導体（２）を取り囲む少なくとも一つの非浸
透性シース（４）と、 存在する場合には導体内の全ての隙間と、各テープ層間
の全ての隙間およびテープ構造体自体の中の全てのボイ
ドを含めた絶縁システムとをほぼ満たす、請求項１から
１１に記載の含浸コンパウンドとを含む、高圧直流電力
ケーブル（１）。12. A system comprising at least one conductor (2) and a plurality of permeable tapes wrapped around the conductor.
At least one insulating layer (3) surrounding the conductor; at least one non-permeable sheath (4) surrounding the insulated conductor (2); all gaps in the conductor, if present; A high-voltage DC power cable (1), comprising: an impregnating compound according to any one of claims 1 to 11 which substantially fills all the gaps and the insulation system including all voids in the tape structure itself.
フト紙で作成された重ね合わせたテープからなることを
特徴とする請求項１２に記載の高圧ケーブル。13. High-voltage cable according to claim 12, wherein the permeable conductor insulator (3) comprises a superposed tape made of kraft paper.
重ね合わせたテープ層を含む絶縁システムと、外側の非
浸透性シースとを有する高圧電力ケーブルを作成する方
法であって、絶縁された一つまたは複数の導体を加圧容
器中に配置して、この一つまたは複数の導体および／ま
たは絶縁体を加熱、乾燥、および真空化する段階と、そ
の後この一つまたは複数の導体および／または絶縁体
を、含浸用の絶縁された一つまたは複数の導体で満たす
段階とを含み、一つまたは複数の導体（２）および／ま
たはケーブルの絶縁体（３）に請求項１から１１に記載
のコンパウンドを含浸させる前に、乾燥し絶縁された一
つまたは複数の導体（２、３）を圧力下で冷却する段階
を含む方法。14. A method of making a high voltage power cable having one or more conductors, an insulation system including an impregnated superimposed tape layer, and an outer non-permeable sheath. Placing one or more conductors in a pressurized vessel and heating, drying, and evacuating the one or more conductors and / or insulators, followed by the one or more conductors and / or Or filling the insulation with one or more insulated conductors for impregnation, wherein the one or more conductors (2) and / or the insulation (3) of the cable comprise: A method comprising the step of cooling under pressure the dried and insulated conductor (s) (2, 3) before impregnating the described compound.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO19984234 | 1998-09-14 | ||
| NO984234A NO984234L (en) | 1998-09-14 | 1998-09-14 | Impregnation material for electric cables |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000090750A true JP2000090750A (en) | 2000-03-31 |
Family
ID=19902405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11258845A Withdrawn JP2000090750A (en) | 1998-09-14 | 1999-09-13 | Impregnated compound |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0987718A1 (en) |
| JP (1) | JP2000090750A (en) |
| NO (1) | NO984234L (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100773695B1 (en) | 2007-02-02 | 2007-11-05 | 엘에스전선 주식회사 | Impregnation method for high voltage direct current cable |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE0002019D0 (en) * | 2000-05-31 | 2000-05-31 | Abb Ab | Insulated electric cable |
| US6908673B2 (en) | 2000-06-28 | 2005-06-21 | Pirelli Cavi E Sistemi S.P.A. | Cable with recyclable covering |
| US6824870B2 (en) | 2000-09-28 | 2004-11-30 | Pirelli S.P.A. | Cable with recyclable covering |
| ES2320856T3 (en) | 2000-12-06 | 2009-05-29 | Prysmian S.P.A. | PROCEDURE FOR THE PRODUCTION OF A CABLE WITH A RECYCLABLE COVER. |
| WO2004066317A1 (en) | 2003-01-20 | 2004-08-05 | Gabriele Perego | Cable with recycable covering layer |
| CN101297379B (en) | 2005-10-25 | 2011-06-15 | 普雷斯曼电缆及系统能源有限公司 | Energy cable containing mixture of dielectric liquid and thermoplastic polymer |
| WO2009000326A1 (en) | 2007-06-28 | 2008-12-31 | Prysmian S.P.A. | Energy cable |
| EP3967721A1 (en) | 2020-09-10 | 2022-03-16 | Nexans | Impregnating fluid for high voltage paper lapped power cables |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4259540A (en) * | 1978-05-30 | 1981-03-31 | Bell Telephone Laboratories, Incorporated | Filled cables |
| GR850003B (en) * | 1984-07-11 | 1985-05-06 | Siemens Ag | |
| NO952808L (en) * | 1995-07-14 | 1997-01-15 | Norsk Hydro As | Electrically insulating oil-based composition and its use |
-
1998
- 1998-09-14 NO NO984234A patent/NO984234L/en not_active Application Discontinuation
-
1999
- 1999-07-26 EP EP99401901A patent/EP0987718A1/en not_active Withdrawn
- 1999-09-13 JP JP11258845A patent/JP2000090750A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100773695B1 (en) | 2007-02-02 | 2007-11-05 | 엘에스전선 주식회사 | Impregnation method for high voltage direct current cable |
Also Published As
| Publication number | Publication date |
|---|---|
| EP0987718A1 (en) | 2000-03-22 |
| NO984234L (en) | 2000-03-15 |
| NO984234D0 (en) | 1998-09-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR20010033402A (en) | Dielectric gelling composition, the use of such dielectric gelling composition, an insulated electric dc-cable comprising such gelling composition and a method for manufacturing an insulated electric dc-cable comprising such gelling composition | |
| JP2000090750A (en) | Impregnated compound | |
| CN103959400B (en) | Direct current (DC) Transmission system and manufacture method of lamination insulating barrier including controlled thickness | |
| EP1390958B1 (en) | Dielectric fluid | |
| EP0328576B2 (en) | Electrical capacitor having improved dielectric system | |
| TWI427650B (en) | Power transformer | |
| WO1997004466A1 (en) | Power cable, manufacturing method and impregnating compound | |
| CN1285074A (en) | Insulated electric direct current cable | |
| KR20200127421A (en) | Terminal device for testing a power cable | |
| EP3544035B1 (en) | Repairing gel insulation of electrical devices | |
| EP3544032B1 (en) | Transformer with gel composite insulation | |
| JP2016513443A (en) | Insulator for high voltage equipment | |
| WO1997004465A1 (en) | Electrical insulating oil based compound and its use | |
| US4774382A (en) | Direct current cable insulation with insulating composition including electronegative gas | |
| CN1285076A (en) | Dielectric gelling composition, method of manufacturing such a dielectric gelling composition and electric dc-cable comprising insulation system | |
| JP2000268652A (en) | Manufacture of solid power cable | |
| US2007761A (en) | Electrical cable | |
| US1937490A (en) | Electric condenser | |
| WO2001093279A2 (en) | Insulated electric cable | |
| JP4265044B2 (en) | AC OF power cable | |
| WO2023011912A1 (en) | Bushing comprising low-viscosity insulating fluid and electrical facility with bushing | |
| JP2001023449A (en) | Plastic laminate paper and oil-impregnated solid power cable using thereof | |
| Trinh et al. | Low-temperature behavior of synthetic oils | |
| JPH10208553A (en) | Direct current oil impregnated power cable | |
| WO2017088932A1 (en) | Composite insulation material for an electric power cable, process to manufacture a power cable and a power cable containing the insulation material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20061205 |