JP3792861B2 - Neutral wire composite DC power cable - Google Patents

Neutral wire composite DC power cable Download PDF

Info

Publication number
JP3792861B2
JP3792861B2 JP27753797A JP27753797A JP3792861B2 JP 3792861 B2 JP3792861 B2 JP 3792861B2 JP 27753797 A JP27753797 A JP 27753797A JP 27753797 A JP27753797 A JP 27753797A JP 3792861 B2 JP3792861 B2 JP 3792861B2
Authority
JP
Japan
Prior art keywords
power cable
main
neutral wire
layer
outer periphery
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.)
Expired - Fee Related
Application number
JP27753797A
Other languages
Japanese (ja)
Other versions
JPH11120833A (en
Inventor
隆行 平澤
宏 山之内
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electric Power Development Co Ltd
Fujikura Ltd
Original Assignee
Electric Power Development Co Ltd
Fujikura Ltd
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 Electric Power Development Co Ltd, Fujikura Ltd filed Critical Electric Power Development Co Ltd
Priority to JP27753797A priority Critical patent/JP3792861B2/en
Publication of JPH11120833A publication Critical patent/JPH11120833A/en
Application granted granted Critical
Publication of JP3792861B2 publication Critical patent/JP3792861B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Landscapes

  • Insulated Conductors (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、水中ケーブル（海底ケーブル）に用いるのに好適な中性線を直流送電用ケーブルに一体にした中性線複合直流電力用ケーブルに関する。
【０００２】
【従来の技術】
一般に、直流送電において、図３〜図５に示すように、高圧の交流電圧（ＡＣ）を交／直変換装置ａで直流変換し、その直流高電圧を１または複数の直流電力ケーブルｂにより直流（ＤＣ）送電する。そして、送電された直流高電圧を直／交変換装置ｃにより交流電圧に変換して、交流送電する。
【０００３】
従来の上記の直流電力ケーブルｂの運用法のひとつの単極運転法には、図３に示す大地帰路がある。これは、１条の直流電力ケーブルｂを用いてその電力ケーブルｂ両端を大地（海水）に接地し、海水を帰路回路ｄとして送電するものである。
また、図４に示すように、帰路回路に帰線（中性線）ｅを使用した帰線帰路がある。
上記のように、単極送電における帰路回路ｄとしては、海水に流すか帰線ｅを用いるかしている。
【０００４】
また、他の運用法としては、図５に示すように、正・負（＋／−）の各極について交／直変換装置ａ１、ａ２、直流電力ケーブルｂ１、ｂ２、直／交変換装置ｃ１、ｃ２を設ける双極運転法がある。この双極運転法においては、帰線ｅによっても高圧直流送電しているが、通常、正・負のバランスを取るために接地点間を結ぶ中性線ｆを設けている。
【０００５】
【発明が解決しようとする課題】
しかしながら、従来単極運転法では、大地帰路がよく用いられたが、大地電位の変動など周囲に何らかの悪影響を及ぼす危険性があり、帰線（中性線）を帰路に用いる場合が多くなってきている。
また、双極運転法はどちらかの高圧ケーブルに異常が生じた場合中性線を帰線回路とするため、中性線が必要である。
したがって、単極運転法の場合には最低２条（電力ケーブル、帰線）、双極の場合には３条（電力ケーブル２条、中性線）の布設が必要であり、布設工期およびコストが高いものになる。また、直流電力ケーブルに流れる直流電流による磁界で布設場所の近くでは、航行している船舶などにコンパスエラーが生じる恐れもある。
【０００６】
本発明は、前記従来の問題点を解消するべくなされたものであって、電力ケーブルの布設工期短縮およびコスト削減ができ、ケーブルから外部へ磁界が漏れることを確実に防止できる中性線複合直流電力用ケーブルを提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明は、上記の目的を達成するため、次の構成を有する。
請求項１の発明は、水中で高電圧の直流送電に用いる直流電力用ケーブルにおいて、主直流電力ケーブル部は、中心の主導体の外周に順に内部半導電層、主絶縁層、外部半導電層、金属シース層および防食層を有し、中性線部は導体外周に絶縁層を有するものであって、この中性線部導体の総断面積は、主導体の断面積の５０〜１００％であり、主直流電力ケーブル部の外周に接して中性線部を複数配設しかつ一体的に固定したことを特徴とする中性線複合直流電力用ケーブルである。
請求項２の発明は、主電力ケーブル主絶縁層は耐直流送電電圧用の絶縁材料からなり、中性線部絶縁層は主直流電力ケーブル部との絶縁が確保される絶縁材料からなり、主電力ケーブル部の外周には、複数配列された中性線部の内周および外周に半導電層を設けたことを特徴とする請求項１に記載の中性線複合直流電力用ケーブルである。
請求項３の発明は、直流電力用ケーブルは、海中で高電圧の直流送電に用いるものであり、ケーブル外周に座床、鉄線外装およびサービング層を設けたものであることを特徴とする請求項１または２に記載の中性線複合直流電力用ケーブルである。
なお、中性線部は、主電力ケーブルの外周をほぼ全周に亙って覆うように配設することが好ましい。
【０００８】
上記の本発明によれば、主電力ケーブル部の金属シース層の外周に中性線部を複数配設しかつ一体的に固定したので、主電力ケーブル部と中性線部が一体的になる。したがって、電力ケーブル布設に際して、従来別途に布設していた主電力ケーブルと中性線を一つの電力ケーブルとして一括に布設できる。
また、中性線部を帰路回路として用いた場合に、主導体に流れる直流電流による発生磁界が中性線部導体の電流による磁界でキャンセルできるので、主導体の電流磁界が外部に漏れるのを防止できる。
また、中性線部導体の総断面積は主導体の断面積の５０〜１００％として、中性線部を帰路回路として利用する場合に発熱などを防止できる。
【０００９】
なお、主絶縁層を直流送電電圧用の絶縁材料とし、中性線部絶縁層を主直流電力ケーブル部との絶縁が確保される絶縁材料とすれば、中性線部絶縁体を直流高圧用にする必要がなく、絶縁材料を低廉にすることができる。
また、中性線部は、主電力ケーブルの外周をほぼ全周に亙って覆うように配設すれば、全周にわたって均一な磁界で主導体電流発生磁界をキャンセルして該磁界が外部に漏れることをより確実に防止できる。
【００１０】
【発明の実施の形態】
以下、図面を参照して本発明の実施形態を詳細に説明する。
図１は実施形態にかかる直流送電に用いる直流電力用ケーブルの説明図である。図に示すように、直流電力用ケーブルは、主直流電力ケーブル部１０と中性線部１２とからなり、前記図３の単極送電法、図４の双極送電法のいずれにも使用可能なものである。
【００１１】
前記主直流電力ケーブル部１０は、中心の導体（主導体）１４の外周に順に内部半導電層１６、主絶縁層１８、外部半導電層２０、鉛被層（金属シース層に相当）２２、および防食層２４を有する。それと共に、前記中性線部１２は中心導体２６外周に絶縁層２８を有するものである。
そして、主直流電力ケーブル部１０の外周に接して中性線部１２を複数（実施形態では２５本）、主直流電力ケーブル部１０に同心円上に配設しかつ一体的に固定したものである。
【００１２】
主直流電力ケーブル部１０の主絶縁層１８は、耐直流送電電圧用（６０〜５００ｋｖ）の絶縁材料を用いることができる。ゴム系またはプラスチック系のもので例えばカーボン充填材入り架橋ポリエチレン、変成ポリオレフィンの樹脂、または単独の架橋ポリエチレンからなることができる。
また、中性線部絶縁層２８は主直流電力ケーブル部１０との絶縁が確保される絶縁材料からなり、例えば非架橋ポリエチレンを２〜７ｍｍ被覆したものである。
【００１３】
なお、主直流電力ケーブル部１０の鉛被層２２内周部には遮蔽層３０を設けることができる。また、中性線部１２はその配列された内周に半導電クッション層３２、外周に半導電遮水層３４などを設けることができる。また、中性線部１２は、主直流電力ケーブル部１０の外周をほぼ全周に亙って覆うように配設することが好ましい。
【００１４】
そして、中性線部１２中心導体２６の総断面積は前記電力ケーブル部１０の主導体１４の断面積の５０〜１００％である。
【００１５】
前記実施形態の中性線複合直流ケーブルを海底ケーブルとして用いる場合は、外周部に座床、鉄線外装およびサービング層を設ける。
【００１６】
上記実施形態によれば、主電力ケーブル部１０の鉛被層２２の外周に中性線部１２を複数配設して固定したので、主電力ケーブル部１０と中性線部１２が一体になり、電力ケーブル布設に際して、主電力ケーブルと中性線を一つの電力ケーブルとして一括に布設できる。また、中性線部１２を帰路回路として用いた場合に、主導体１４に流れる直流電流による発生磁界が中性線部導体２６の電流による磁界でキャンセルできるので、主導体１４の電流磁界が外部に漏れるのを防止できる。したがって、航行船舶にコンパスエラーが生じることはない。
【００１７】
なお、主絶縁層１８を直流送電電圧用の絶縁材料とし、絶縁層２８を鉛被層２２との絶縁が確保される絶縁材料とするので、中性線部絶縁層２８を直流高圧用にする必要がなく、絶縁材料を低廉にすることができる。
【００１８】
また、中性線部１２導体２６の総断面積は主導体の断面積の５０〜１００％とするので、中性線部１２を帰路回路として利用する場合に十分な導体断面積であるので発熱などを防止できる。
また、中性線部１２は、主直流電力ケーブル部１０の外周をほぼ全周に亙って覆うように配設するので、全周にわたって均一な磁界で主導体電流発生磁界を確実にキャンセルできる。
【００１９】
さらに、概略設計値として、例えば導体が８００ｍｍ2の海底直流電力ケーブルにおいて、６０ｋｖ級で外径１２６．２ｍｍ、許容電流１３００Ａであり、１２５ｋｖ級で外径１３２．０ｍｍ、許容電流１２８０Ａである。また、２５０ｋｖ級で外径１４２．８ｍｍ、許容電流１２５０Ａであり、５００ｋｖ級で外径１６５．０ｍｍ、許容電流１２１０Ａである。これに対して従来の８００ｍｍ2の海底直流電力ケーブルでは、６０ｋｖ級で外径８８．６ｍｍ、許容電流１５３０Ａであり、１２５ｋｖ級で外径９５ｍｍ、許容電流１４８０Ａであり、また２５０ｋｖ級で外径１０７．８ｍｍ、許容電流１４１０Ａ、５００ｋｖ級では外径１３２ｍｍ、許容電流１３２０Ａであり、大きさ的にも極端に大きくなっておらず、布設などが容易になることが理解できる。
【００２０】
なお、本発明は前記実施形態のように主直流電力ケーブル部にＣＶ直流電力ケーブルの構造を採用することに限定されず、図２に示すような、ＯＦ直流電力ケーブルによっても同様に実施できることは明らかである。図２において、３６は油路であって油路３６内周面に金属スパイラルが設けられている。その他は、図１と同様部分に同一符号を付している。
【００２１】
【発明の効果】
以上説明した通り、本発明によれば、主直流電力ケーブルと中性線を一体にするので、電力ケーブルの布設工期短縮およびコスト削減ができ、それと共に、複数の中性線が直流電力ケーブルの外周を取り巻くので直流電力ケーブルから外部へ磁界が漏れることを確実に防止できる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る中性線複合直流電力用ケーブルの説明図である。
【図２】他の実施形態の中性線複合直流電力用ケーブルの説明図である。
【図３】直流電力ケーブルの大地帰路の単極運転法の説明図である。
【図４】直流電力ケーブルの帰線回路の単極運転法の説明図である。
【図５】直流電力ケーブルの双極運転法の説明図である。
【符号の説明】
１０ 主直流電力ケーブル部
１２ 中性線部
１４ 主導体
１８ 主絶縁層
２２ 鉛被層
２６ 中性線部中心導体
２８ 中性線部絶縁層[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a neutral wire composite DC power cable in which a neutral wire suitable for use in an underwater cable (submarine cable) is integrated with a DC power transmission cable.
[0002]
[Prior art]
In general, in DC power transmission, as shown in FIGS. 3 to 5, a high-voltage AC voltage (AC) is converted into DC by an AC / DC converter a, and the DC high voltage is converted into DC by one or more DC power cables b. (DC) Transmit power. Then, the transmitted DC high voltage is converted into an AC voltage by the DC / AC converter c, and AC transmission is performed.
[0003]
One of the conventional methods for operating the DC power cable b is a single-pole operation method as shown in FIG. This uses a single DC power cable b to ground both ends of the power cable b to the ground (seawater) and transmit the seawater as a return circuit d.
Further, as shown in FIG. 4, there is a return route using a return line (neutral line) e in the return circuit.
As described above, as the return circuit d in the single-pole power transmission, the return circuit e is flowed into seawater or the return line e is used.
[0004]
As other operation methods, as shown in FIG. 5, the AC / DC converters a1 and a2, the DC power cables b1 and b2, and the DC / AC converter c1 with respect to the positive and negative (+/−) poles. , C2 is a bipolar operation method. In this bipolar operation method, high-voltage direct current transmission is performed also by a return line e, but normally, a neutral line f connecting between grounding points is provided in order to balance positive and negative.
[0005]
[Problems to be solved by the invention]
However, in the conventional single-pole operation method, the earth return path is often used, but there is a risk of adverse effects on the surroundings such as fluctuations in the earth potential, and the return line (neutral line) is often used for the return path. ing.
In addition, the bipolar operation method requires a neutral wire because a neutral wire is used as a return circuit when an abnormality occurs in one of the high-voltage cables.
Therefore, in the case of the single pole operation method, it is necessary to lay at least 2 (power cable, return line), and in the case of bipolar, 3 (power cable, 2 neutral lines) is required. It will be expensive. Further, a compass error may occur in a navigating ship or the like near a laying place due to a magnetic field generated by a direct current flowing through a direct current power cable.
[0006]
The present invention has been made to solve the above-described conventional problems, and it is possible to reduce the installation period and cost of the power cable, and to reliably prevent the magnetic field from leaking from the cable to the outside. An object is to provide a power cable.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has the following configuration.
The invention according to claim 1 is a DC power cable used for high-voltage DC transmission in water, wherein the main DC power cable portion is formed in order of an inner semiconductive layer, a main insulating layer , and an outer semiconductive layer on the outer periphery of the central main conductor. , has a metal sheath layer and anticorrosive layer, the neutral line portion is a one having an insulating layer on the conductor periphery, the total cross-sectional area of the neutral section conductors, 50-100% of the cross-sectional area of the main body A neutral wire composite DC power cable characterized in that a plurality of neutral wire portions are disposed in contact with the outer periphery of the main DC power cable portion and are integrally fixed.
According to another aspect of the invention, the main power cable main insulating layer is made of an insulating material for耐直stream transmission voltage, neutral section insulator layer is made of an insulating material insulating the main DC power cable section is secured, the main The neutral wire composite DC power cable according to claim 1, wherein a semiconductive layer is provided on an inner periphery and an outer periphery of a plurality of arranged neutral wire portions on an outer periphery of the power cable portion .
According to a third aspect of the present invention, the DC power cable is used for high-voltage DC transmission in the sea, and is provided with a seating floor, an iron wire exterior, and a serving layer on the outer periphery of the cable. The neutral wire composite DC power cable according to 1 or 2.
In addition, it is preferable to arrange | position a neutral wire part so that the outer periphery of a main power cable may be covered over the perimeter.
[0008]
According to the present invention, a plurality of neutral wire portions are disposed and fixed integrally on the outer periphery of the metal sheath layer of the main power cable portion, so that the main power cable portion and the neutral wire portion are integrated. . Therefore, when laying the power cable, the main power cable and the neutral wire that have been separately laid conventionally can be laid as a single power cable.
In addition, when the neutral wire portion is used as a return circuit, the magnetic field generated by the direct current flowing in the main conductor can be canceled by the magnetic field due to the current of the neutral wire portion conductor, so that the current magnetic field of the main conductor leaks to the outside. Can be prevented.
Further, the total cross-sectional area of the neutral wire portion conductor is 50 to 100% of the cross-sectional area of the main conductor, so that heat generation can be prevented when the neutral wire portion is used as a return circuit.
[0009]
If the main insulation layer is an insulation material for DC transmission voltage, and the neutral wire insulation layer is an insulation material that ensures insulation from the main DC power cable, the neutral wire insulation is used for DC high voltage. Therefore, the insulating material can be made inexpensive.
In addition, if the neutral wire portion is arranged so as to cover the outer circumference of the main power cable over almost the entire circumference, the magnetic field generated by the main conductor current is canceled with a uniform magnetic field over the entire circumference. Leakage can be prevented more reliably.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Drawing 1 is an explanatory view of the cable for direct-current power used for direct-current power transmission concerning an embodiment. As shown in the figure, the DC power cable is composed of a main DC power cable portion 10 and a neutral wire portion 12, and can be used for either the unipolar power transmission method of FIG. 3 or the bipolar power transmission method of FIG. Is.
[0011]
The main DC power cable unit 10 includes an inner semiconductive layer 16, a main insulating layer 18, an outer semiconductive layer 20, a lead coating layer (corresponding to a metal sheath layer) 22 in order on the outer periphery of a central conductor (main conductor) 14. And an anticorrosion layer 24. At the same time, the neutral wire portion 12 has an insulating layer 28 on the outer periphery of the central conductor 26.
A plurality of neutral wire portions 12 (25 in the embodiment) are disposed in contact with the outer periphery of the main DC power cable portion 10, are concentrically arranged on the main DC power cable portion 10, and are integrally fixed. .
[0012]
The main insulating layer 18 of the main DC power cable unit 10 can be made of an insulating material for a DC-proof transmission voltage (60 to 500 kv). For example, the rubber-based or plastic-based one can be made of a crosslinked polyethylene containing a carbon filler, a modified polyolefin resin, or a single crosslinked polyethylene.
The neutral wire portion insulating layer 28 is made of an insulating material that ensures insulation from the main DC power cable portion 10, and is, for example, coated with 2 to 7 mm of non-crosslinked polyethylene.
[0013]
A shielding layer 30 can be provided on the inner periphery of the lead coating layer 22 of the main DC power cable unit 10. Further, the neutral wire portion 12 can be provided with a semiconductive cushion layer 32 on the inner circumference where the neutral wires 12 are arranged and a semiconductive water shielding layer 34 on the outer circumference . Moreover, it is preferable that the neutral wire portion 12 is disposed so as to cover the outer circumference of the main DC power cable portion 10 over almost the entire circumference.
[0014]
The total cross-sectional area of the neutral conductor 12 center conductor 26 is 50 to 100% of the cross-sectional area of the main conductor 14 of the power cable section 10.
[0015]
When the neutral wire composite DC cable of the embodiment is used as a submarine cable, a seat floor, an iron wire exterior, and a serving layer are provided on the outer peripheral portion.
[0016]
According to the above embodiment, since a plurality of neutral wire portions 12 are disposed and fixed on the outer periphery of the lead coating layer 22 of the main power cable portion 10, the main power cable portion 10 and the neutral wire portion 12 are integrated. When laying the power cable, the main power cable and the neutral wire can be laid together as one power cable. Further, when the neutral wire portion 12 is used as a return circuit, the magnetic field generated by the direct current flowing through the main conductor 14 can be canceled by the magnetic field due to the current of the neutral wire portion conductor 26, so that the current magnetic field of the main conductor 14 is external. To prevent leakage. Therefore, no compass error occurs in the sailing vessel.
[0017]
In addition, since the main insulating layer 18 is an insulating material for DC transmission voltage and the insulating layer 28 is an insulating material that ensures insulation from the lead-coated layer 22, the neutral line insulating layer 28 is used for DC high voltage. There is no need, and the insulating material can be made inexpensive.
[0018]
Further, since the total cross-sectional area of the neutral wire portion 12 conductor 26 is 50 to 100% of the cross-sectional area of the main conductor, the conductor cross-sectional area is sufficient when the neutral wire portion 12 is used as a return circuit. Can be prevented.
Further, since the neutral wire portion 12 is disposed so as to cover the outer periphery of the main DC power cable portion 10 over almost the entire circumference, the magnetic field generated by the main conductor current can be reliably canceled with a uniform magnetic field over the entire circumference. .
[0019]
Further, as a rough design value, for example, in a submarine DC power cable having a conductor of 800 mm 2 , an outer diameter of 60 kv class is 126.2 mm and an allowable current is 1300 A, and an outer diameter of 125 kv class is 132.0 mm and an allowable current is 1280 A. In addition, the outer diameter is 142.8 mm and the allowable current is 1250 A in the 250 kv class, and the outer diameter is 165.0 mm and the allowable current is 1210 A in the 500 kv class. In contrast, a conventional 800 mm 2 submarine DC power cable has an outer diameter of 88.6 mm and an allowable current of 1530 A at 60 kv class, an outer diameter of 95 mm and an allowable current of 1480 A at 125 kv class, and an outer diameter of 107 at 250 kv class. .8 mm, allowable current 1410 A, and 500 kv class have an outer diameter of 132 mm and an allowable current of 1320 A, which are not extremely large in size and can be understood to be easy to lay.
[0020]
Note that the present invention is not limited to adopting the structure of the CV DC power cable in the main DC power cable portion as in the above-described embodiment, and can be similarly implemented with an OF DC power cable as shown in FIG. it is obvious. 2, 3 6 metal spiral is provided an oil passage to the oil passage 3 within 6 peripheral surface. Other parts are the same as those in FIG.
[0021]
【The invention's effect】
As described above, according to the present invention, since the main DC power cable and the neutral wire are integrated, the construction period of the power cable can be shortened and the cost can be reduced. Since it surrounds the outer periphery, it is possible to reliably prevent the magnetic field from leaking from the DC power cable to the outside.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram of a neutral wire composite DC power cable according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a neutral wire composite DC power cable according to another embodiment.
FIG. 3 is an explanatory diagram of a single-pole operation method of a ground return path of a DC power cable.
FIG. 4 is an explanatory diagram of a single pole operation method of a return circuit of a DC power cable.
FIG. 5 is an explanatory diagram of a bipolar operation method of a DC power cable.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Main DC power cable part 12 Neutral wire part 14 Main conductor 18 Main insulation layer 22 Lead coating layer 26 Neutral wire part center conductor 28 Neutral wire part insulation layer

Claims (3)

水中で高電圧の直流送電に用いる直流電力用ケーブルにおいて、
主直流電力ケーブル部は、中心の主導体の外周に順に内部半導電層、主絶縁層、外部半導電層、金属シース層および防食層を有し、中性線部は導体外周に絶縁層を有するものであって、この中性線部導体の総断面積は、主導体の断面積の５０〜１００％であり、
主直流電力ケーブル部の外周に接して中性線部を複数配設しかつ一体的に固定したことを特徴とする中性線複合直流電力用ケーブル。 In DC power cables used for high voltage DC transmission in water ,
The main DC power cable part has an inner semiconductive layer, a main insulating layer , an outer semiconductive layer, a metal sheath layer and a corrosion protection layer in order on the outer periphery of the central main conductor, and the neutral wire part has an insulating layer on the outer periphery of the conductor. The total cross-sectional area of the neutral wire portion conductor is 50 to 100% of the cross-sectional area of the main conductor,
A neutral wire composite DC power cable, wherein a plurality of neutral wire portions are arranged in contact with the outer periphery of the main DC power cable portion and fixed integrally. 主電力ケーブル主絶縁層は耐直流送電電圧用の絶縁材料からなり、中性線部絶縁層は主直流電力ケーブル部との絶縁が確保される絶縁材料からなり、
主電力ケーブル部の外周には、複数配列された中性線部の内周および外周に半導電層を設けたことを特徴とする請求項１に記載の中性線複合直流電力用ケーブル。The main power cable main insulation layer is made of an insulating material for DC-proof transmission voltage, and the neutral wire portion insulation layer is made of an insulating material that ensures insulation from the main DC power cable portion.
The neutral wire composite DC power cable according to claim 1, wherein a semiconductive layer is provided on an inner periphery and an outer periphery of a plurality of neutral wire portions arranged on the outer periphery of the main power cable portion . 直流電力用ケーブルは、海中で高電圧の直流送電に用いるものであり、ケーブル外周に座床、鉄線外装およびサービング層を設けたものであることを特徴とする請求項１または２に記載の中性線複合直流電力用ケーブル。The DC power cable is used for high-voltage DC transmission in the sea, and is provided with a seat floor, an iron wire exterior, and a serving layer on the outer periphery of the cable. Cable for composite direct current power.
JP27753797A 1997-10-09 1997-10-09 Neutral wire composite DC power cable Expired - Fee Related JP3792861B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP27753797A JP3792861B2 (en) 1997-10-09 1997-10-09 Neutral wire composite DC power cable

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP27753797A JP3792861B2 (en) 1997-10-09 1997-10-09 Neutral wire composite DC power cable

Publications (2)

Publication Number Publication Date
JPH11120833A JPH11120833A (en) 1999-04-30
JP3792861B2 true JP3792861B2 (en) 2006-07-05

Family

ID=17584943

Family Applications (1)

Application Number Title Priority Date Filing Date
JP27753797A Expired - Fee Related JP3792861B2 (en) 1997-10-09 1997-10-09 Neutral wire composite DC power cable

Country Status (1)

Country Link
JP (1) JP3792861B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4482851B2 (en) 2001-12-18 2010-06-16 住友電気工業株式会社 DC superconducting cable
KR100479456B1 (en) * 2002-10-31 2005-03-31 한국전력공사 Waterproof underground power cable applications
JP4668003B2 (en) * 2005-08-22 2011-04-13 株式会社ビスキャス Coaxial cable for bipolar DC power transmission
WO2011024262A1 (en) * 2009-08-26 2011-03-03 太陽ケーブルテック株式会社 Electric cable
CN103093891A (en) * 2013-02-04 2013-05-08 宁波东方电缆股份有限公司 Direct current submarine cable for +/- 320kV flexible transmission
CN104505163A (en) * 2014-12-22 2015-04-08 河北华通线缆集团有限公司 Compact composite conductor overhead composite cable and production process for same

Also Published As

Publication number Publication date
JPH11120833A (en) 1999-04-30

Similar Documents

Publication Publication Date Title
RU2366016C2 (en) Power cable line
US20120024565A1 (en) Submarine electric power transmission cable armour transition
JP4801236B2 (en) High voltage DC power cable and its submarine cable laying method
JP3822331B2 (en) Neutral wire composite DC power cable and DC power cable line
JP3792861B2 (en) Neutral wire composite DC power cable
JPS6127510A (en) Undersea branching device of optical submarine cable
JP4668003B2 (en) Coaxial cable for bipolar DC power transmission
JPH1040745A (en) Coaxial cable using litz wire
JP3792860B2 (en) Neutral wire composite DC power cable
JP3792862B2 (en) Neutral wire composite DC power cable
CN111968780A (en) Medium-low voltage submarine cable
JP2000503461A (en) Submarine electrodes for high-voltage DC transmission systems.
JP2007287335A (en) Shield conductive line
US20240177889A1 (en) Power cable system having different conductor connecting part , and power cable connection method having different conductors
JP3417590B2 (en) DC submarine power cable line
CN209357479U (en) A kind of XLPE insulating layer and its cable
JP2024509248A (en) Cable assembly and cable assembly manufacturing method
JPH11120835A (en) Neutral conductor composite cable for direct current power
US20230178268A1 (en) HVAC-cable with composite conductor
KR20170104780A (en) Submarine cable
JPH0438426Y2 (en)
KR200484835Y1 (en) straight connection unit for aluminium armored cable
JP2017093278A (en) Power cable connection structure
KR20230175124A (en) DC Power Cable System
KR20220077592A (en) Joint box of power cable

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20051129

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20051213

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060208

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20060328

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20060406

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100414

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110414

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120414

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130414

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130414

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140414

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees