CN107346680A - 一种中高压直流电缆 - Google Patents

一种中高压直流电缆 Download PDF

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Publication number
CN107346680A
CN107346680A CN201610293193.3A CN201610293193A CN107346680A CN 107346680 A CN107346680 A CN 107346680A CN 201610293193 A CN201610293193 A CN 201610293193A CN 107346680 A CN107346680 A CN 107346680A
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layer
outside
direct current
semiconductive shielding
conductor
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张立阳
吴林磊
万鹏
蒋国华
石海
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Jiangsu Baoan Cable Co Ltd
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Jiangsu Baoan Cable Co Ltd
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Priority to CN201610293193.3A priority Critical patent/CN107346680A/zh
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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B9/00Power cables
    • H01B9/02Power cables with screens or conductive layers, e.g. for avoiding large potential gradients
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators 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
    • H01B3/44Insulators 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
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/02Disposition of insulation
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/18Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
    • H01B7/22Metal wires or tapes, e.g. made of steel

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  • Physics & Mathematics (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Insulated Conductors (AREA)

Abstract

本发明涉及一种中高压直流电缆,它包括导体,在所述导体外部设有半导电屏蔽层Ⅰ,在所述半导电屏蔽层Ⅰ外部设有交联聚乙烯绝缘层,在所述交联聚乙烯绝缘层外部设有半导电屏蔽层Ⅱ,在所述半导电屏蔽层Ⅱ外部设有金属屏蔽层,它们组成线芯单元,所述半导电屏蔽层Ⅰ、交联聚乙烯绝缘层和半导电屏蔽层Ⅱ三层共挤而成,所述线芯单元共设两个,在所述线芯单元外部设有填充层,在所述填充层外部设有双层钢丝铠装层,在所述双层钢丝铠装层内设有铜丝,在所述双层钢丝铠装层外部外护套。本发明减少输电过程中的损耗,提高了传输效率,电缆成本低。

Description

一种中高压直流电缆
技术领域
本发明涉及一种电缆,具体涉及一种直流电缆。
背景技术
交流电缆在供电时,交流电阻由于集肤效应与邻近效应的影响,电阻较大,而且由于交流供电时产生了电容与电感,进而产生阻抗,绝缘损耗也较大。
发明内容
发明目的:本发明的目的是为了克服现有技术中的不足,提供一种减少输电过程中的损耗,提高了传输效率,电缆成本低的中高压直流电缆。
技术方案:为了解决上述技术问题,本发明所述的一种中高压直流电缆,它包括导体,在所述导体外部设有半导电屏蔽层Ⅰ,在所述半导电屏蔽层Ⅰ外部设有交联聚乙烯绝缘层,在所述交联聚乙烯绝缘层外部设有半导电屏蔽层Ⅱ,在所述半导电屏蔽层Ⅱ外部设有金属屏蔽层,它们组成线芯单元,所述半导电屏蔽层Ⅰ、交联聚乙烯绝缘层和半导电屏蔽层Ⅱ三层共挤而成,所述线芯单元共设两个,在所述线芯单元外部设有填充层,在所述填充层外部设有双层钢丝铠装层,在所述双层钢丝铠装层内设有铜丝,在所述双层钢丝铠装层外部外护套。
所述导体的截面小于800mm2时,采用紧压圆形结构。
所述导体的截面大于或等于800mm2时采用分割导体,导体紧压填充系数大于0.92,分割导体采用四或五个股。
所述金属屏蔽层为铜带或铜丝,其中铜带采用重叠绕包,重叠率为10%-30%,铜带厚度为0.15-0.20mm,铜丝的截面达到35mm2以上。
所述金属屏蔽层为铝护套或铅护套,其中铝护套采用皱纹护套,金属套厚度为2 mm,金属护套内允许绕包缓冲阻水带。
所述填充层为发泡聚乙烯层,具有一定的强度,强度达到8MPa,完全填满空隙,对绝缘形成强有力的支撑。
所述外护套为阻水性高密度聚乙烯套,护套厚度大于3.5mm。
本发明将两根中高压绝缘线芯单独分相屏蔽,或是分相金属套,线芯间采用异形填充条完全填充,电缆紧凑、对称,电缆绝缘采用添加特殊纳米材料的交联聚乙烯,可以减少直流输时累积的空间电荷,中压电缆绝缘屏蔽后采用铜丝或铜带屏蔽,高压电缆绝缘屏蔽外采用铅套或是铅套,电缆缆芯成形为扁形结构,外部统包铠装双层钢丝,其中穿插铜丝,双层钢丝铠装可以将线芯紧固保护起来,也能承受各种外力。
有益效果:本发明与现有技术相比,其显著优点是:本发明采用两根绝缘线芯供电,线芯有单独的金属屏蔽层或金属套,两根线芯的电压极性相反,电流相反,外部磁场几乎全部抵消,且没有交流损耗,提高了传输效率,也降低了电缆成本。
附图说明
图1是本发明的结构示意图。
具体实施方式
下面结合附图和实施例对本发明作进一步的说明。
如图1所示,本发明所述的一种中高压直流电缆,它包括导体1,在所述导体1外部设有半导电屏蔽层Ⅰ2,在所述半导电屏蔽层Ⅰ2外部设有交联聚乙烯绝缘层3,在所述交联聚乙烯绝缘层3外部设有半导电屏蔽层Ⅱ4,在所述半导电屏蔽层Ⅱ4外部设有金属屏蔽层5,它们组成线芯单元,所述半导电屏蔽层Ⅰ2、交联聚乙烯绝缘层3和半导电屏蔽层Ⅱ4三层共挤而成,所述线芯单元共设两个,在所述线芯单元外部设有填充层6,在所述填充层6外部设有双层钢丝铠装层7,在所述双层钢丝铠装层7内设有铜丝8,在所述双层钢丝铠装层7外部外护套9;所述导体1的截面小于800mm2时,采用紧压圆形结构;所述导体1的截面大于或等于800mm2时采用分割导体,导体紧压填充系数大于0.92,分割导体采用四或五个股;所述金属屏蔽层5为铜带或铜丝,其中铜带采用重叠绕包,重叠率为10%-30%,铜带厚度为0.15-0.20mm,铜丝的截面达到35mm2以上;所述金属屏蔽层5为铝护套或铅护套,其中铝护套采用皱纹护套,金属套厚度为2 mm;所述填充层6为发泡聚乙烯层;所述外护套9为阻水性高密度聚乙烯套,护套厚度大于3.5mm。本发明采用两根绝缘线芯供电,线芯有单独的金属屏蔽层或金属套,两根线芯的电压极性相反,电流相反,外部磁场几乎全部抵消,且没有交流损耗,提高了传输效率,也降低了电缆成本。
本发明提供了一种思路及方法,具体实现该技术方案的方法和途径很多,以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围,本实施例中未明确的各组成部分均可用现有技术加以实现。

Claims (7)

1.一种中高压直流电缆,其特征在于:它包括导体(1),在所述导体(1)外部设有半导电屏蔽层Ⅰ(2),在所述半导电屏蔽层Ⅰ(2)外部设有交联聚乙烯绝缘层(3),在所述交联聚乙烯绝缘层(3)外部设有半导电屏蔽层Ⅱ(4),在所述半导电屏蔽层Ⅱ(4)外部设有金属屏蔽层(5),它们组成线芯单元,所述半导电屏蔽层Ⅰ(2)、交联聚乙烯绝缘层(3)和半导电屏蔽层Ⅱ(4)三层共挤而成,所述线芯单元共设两个,在所述线芯单元外部设有填充层(6),在所述填充层(6)外部设有双层钢丝铠装层(7),在所述双层钢丝铠装层(7)内设有铜丝(8),在所述双层钢丝铠装层(7)外部外护套(9)。
2.根据权利要求1所述的中高压直流电缆,其特征在于:所述导体(1)的截面小于800mm2时,采用紧压圆形结构。
3.根据权利要求1所述的中高压直流电缆,其特征在于:所述导体(1)的截面大于或等于800mm2时采用分割导体,导体紧压填充系数大于0.92,分割导体采用四或五个股。
4.根据权利要求1所述的中高压直流电缆,其特征在于:所述金属屏蔽层(5)为铜带或铜丝,其中铜带采用重叠绕包,重叠率为10%-30%,铜带厚度为0.15-0.20mm,铜丝的截面达到35mm2以上。
5.根据权利要求1所述的中高压直流电缆,其特征在于:所述金属屏蔽层(5)为铝护套或铅护套,其中铝护套采用皱纹护套,金属套厚度为2 mm。
6.根据权利要求1所述的中高压直流电缆,其特征在于:所述填充层(6)为发泡聚乙烯层。
7.根据权利要求1所述的中高压直流电缆,其特征在于:所述外护套(9)为阻水性高密度聚乙烯套,护套厚度大于3.5mm。
CN201610293193.3A 2016-05-06 2016-05-06 一种中高压直流电缆 Pending CN107346680A (zh)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201984891U (zh) * 2011-03-25 2011-09-21 江苏天地龙电缆有限公司 抗震电力电缆
US20120279750A1 (en) * 2011-05-02 2012-11-08 Sjur Kristian Lund High voltage power cable for ultra deep waters applications
CN205751675U (zh) * 2016-05-06 2016-11-30 江苏宝安电缆有限公司 一种中高压直流电缆

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201984891U (zh) * 2011-03-25 2011-09-21 江苏天地龙电缆有限公司 抗震电力电缆
US20120279750A1 (en) * 2011-05-02 2012-11-08 Sjur Kristian Lund High voltage power cable for ultra deep waters applications
CN205751675U (zh) * 2016-05-06 2016-11-30 江苏宝安电缆有限公司 一种中高压直流电缆

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