CN202159945U - ±800kV直流输电线路双V串鼠笼式刚性跳线 - Google Patents

±800kV直流输电线路双V串鼠笼式刚性跳线 Download PDF

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CN202159945U
CN202159945U CN 201120286259 CN201120286259U CN202159945U CN 202159945 U CN202159945 U CN 202159945U CN 201120286259 CN201120286259 CN 201120286259 CN 201120286259 U CN201120286259 U CN 201120286259U CN 202159945 U CN202159945 U CN 202159945U
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马凌
汪雄
李翔
赵全江
江卫华
刘文勋
李勇伟
李永双
周康
梁明
王永刚
李力
肖洪伟
张国华
罗明源
杨宇
张芳杰
郝阳
贺立斋
王学军
何建
陈�光
陈兴哲
薛春林
钱广忠
吴波
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China Energy Construction Group Guangdong Electric Power Design Institute Co Ltd
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Guangdong Electric Power Design Institute
Northwest Electric Power Design Institute of China Power Engineering Consulting Group
Southwest Electric Power Design Institute Co Ltd of China Power Engineering Consulting Group
China Power Engineering Consulting Group East China Electric Power Design Institute Co Ltd
China Power Engineering Consultant Group Central Southern China Electric Power Design Institute Corp
Northeast Electric Power Design Institute of China Power Engineering Consulting Group
North China Electric Power Design Institute of China Power Engineering Consulting Group Corp
China Power Engineering Consulting Group Corp
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Abstract

±800kV直流输电线路双V串鼠笼式刚性跳线，有二个绝缘子V型串(5)的上端悬吊在铁塔跳线支架(1)上并形成二个三角形结构，二个耐张串(2)的两端分别连接有形成封闭结构的六分裂跳线(4)，两端的六分裂跳线(4)之间通过六分裂跳线间隔棒(3)支撑开，中部的六分裂跳线(4)中间有鼠笼式箍架(7)，中部的六分裂跳线(4)通过的抱箍式跳线间隔棒(6)支撑开，所述的二个绝缘子V型串(3)的下端固定在鼠笼式箍架(2)上。本实用新型在解决引流作用的同时，减少跳线风偏摆动，降低了铁塔的对地高度，同时在防冰、防水等方面均比现有的输电线路效果好，达到降低输电线路的工程投资、增加安全可靠性的目的。

Description

±800kV直流输电线路双V串鼠笼式刚性跳线
技术领域
本实用新型涉及一种±800kV直流输电线路双V串鼠笼式刚性跳线。
背景技术
±800kV直流输电线路是目前我国最高电压等级的直流输电线路，耐张塔在工程投资中占较大比例，如何对耐张塔塔型进行优化，缩小塔头尺寸，以降低工程投资是值得探讨的。减少跳线弧垂及其风偏偏移值是缩小耐张塔尺寸的有效方法。而跳线弧垂及偏移主要决定于采用的跳线或固定跳线的方式。
国内外曾作过大量研究试验工作，采取了多种耐张塔跳线方式，从水平跳线到弓形跳线、从软跳线到刚性跳线、从一般耐张塔跳线到三柱耐张塔跳线等，而使用最多的为软跳线及刚性跳线。
日本1000kV线路采用铝管式硬跳线，以减小跳线弧垂和风偏；前苏联采用独立的三柱耐张塔跳线；国内500kV及以下超高压输电线路一般采用普通软跳线，它是由跳线、跳线连接装置及耐张串连接组成，为了减少跳线风偏对线间距离的影响，工程中广泛采用加装1～2串跳线绝缘子串及加装重锤片等方式以增加跳线的垂直荷重，从而减少跳线的风偏角度。
对于±800kV直流特高压输电线路，由于耐张绝缘子片数多、绝缘子尺寸大，导致耐张塔前后侧的耐张串间距离增大，即跳线档距变长。采用现有技术，跳线的弧垂大，跳线的风偏角度也会随之变大，容易造成电气间隙不够，为避免间隙放电，势必增大耐张塔的塔头尺寸，使得耐张塔的整体造价昂贵。
综上所述，现有技术无论从安全可靠性上，还是经济性上，都存在着缺点。
发明内容
本实用新型的目的在于克服上述现有背景技术的不足之处，而提供一种±800kV直流输电线路的双V串鼠笼式刚性跳线。
本实用新型的目的是通过如下措施来达到的：±800kV直流输电线路双V串鼠笼式刚性跳线，它包括铁塔跳线支架，位于铁塔跳线支架两端的耐张串，其特征在于有二个绝缘子V型串的上端悬吊在铁塔跳线支架上并形成二个三角形结构，二个耐张串的两端分别连接有形成封闭结构的六分裂跳线，两端的六分裂跳线之间通过六分裂跳线间隔棒支撑开，中部的六分裂跳线中间有鼠笼式箍架，中部的六分裂跳线通过的抱箍式跳线间隔棒支撑开，所述的二个绝缘子V型串的下端固定在鼠笼式箍架上。
在上述技术方案中，所述的绝缘子V型串由二个呈V型结构的复合绝缘子，位于复合绝缘子上端的联结金具，连接二个复合绝缘子下端的U形挂环，位于U形挂环下端的联结金具组成。
本实用新型±800kV直流输电线路双V串鼠笼式刚性跳线，在解决引流作用的同时，减少跳线风偏摆动，降低了铁塔的对地高度，同时在防冰、防水等方面均比现有的输电线路效果好，同时限制了耐张塔头尺寸，达到降低±800kV直流特高压输电线路的工程投资、增加安全可靠性的目的。
附图说明
图1为本实用新型的结构示意图。
图2为图1中绝缘子V型串的结构示意图。
图3为本实用新型中六分裂跳线间隔棒的结构示意图。
图4为本实用新型中抱箍式跳线间隔棒的结构示意图。
图中1.铁塔跳线支架，2.耐张串，3.六分裂跳线间隔棒，4.六分裂跳线，5.绝缘子V型串，6.抱箍式跳线间隔棒，7.鼠笼式箍架，8.联结金具，9.U形挂环，10.复合绝缘子。
具体实施方式
下面结合附图详细说明本实用新型的实施情况，但它们并不构成对本实用新型的限定，仅作举例而已。同时通过说明本实用新型的优点将变得更加清楚和容易理解。
参阅附图可知：本实用新型±800kV直流输电线路双V串鼠笼式刚性跳线，它包括铁塔跳线支架1，位于铁塔跳线支架1两端的耐张串2，有二个绝缘子V型串5的上端悬吊在铁塔跳线支架1上并形成二个三角形结构(如图2所示)，二个耐张串2的两端分别连接有形成封闭结构的六分裂跳线4，两端的六分裂跳线4之间通过六分裂跳线间隔棒3(如图3所示)支撑开，中部的六分裂跳线4中间有鼠笼式箍架7，中部的六分裂跳线4通过的抱箍式跳线间隔棒6(如图4所示)支撑开，所述的二个绝缘子V型串3的下端固定在鼠笼式箍架2上(如图1所示)。
绝缘子V型串5由二个呈V型结构的复合绝缘子10，位于复合绝缘子10上端的联结金具8，连接二个复合绝缘子10下端的U形挂环9，位于U形挂环9下端的联结金具8组成(如图2所示)。
刚性跳线(中部的六分裂跳线4因加装了抱箍式跳线间隔棒6和鼠笼式箍架7，因此称为刚性跳线)上安装有鼠笼式箍架7(钢管)，鼠笼式箍架采用钢质(或铝质)材料，刚性跳线上安装有六分裂抱箍式跳线间隔棒6，六分裂抱箍式间隔棒6起到了固定刚性跳线间距的作用。
鼠笼式箍架7通过绝缘子V型串5连接至铁塔跳线支架1上，二个绝缘子V型串5采用双V串悬挂方式，可以限制刚性跳线的摆动，缩小塔头尺寸。绝缘子V型串5与鼠笼式箍架7的联结金具深入到跳线之中，不需要再考虑电晕问题。
同时为进一步控制跳线风偏摆动，鼠笼式箍架7可装有重锤片。
刚性跳线和鼠笼式箍架7通过六分裂跳线4和耐张绝缘子串(或称耐张串2)连接，六分裂跳线4上安装有六分裂跳线间隔棒3，六分裂跳线间隔棒3起到了固定六分裂跳线4间距的作用，其采用铝合金，钢制件热镀锌，跳线金具满足现有国家标准的要求。
本实用新型在跳线上安装一个跳线的鼠笼式箍架7，将跳线固定于鼠笼式箍架7上，鼠笼式箍架7通过六分裂抱箍式间隔棒6连接上，使普通跳线成为了钢性跳线。解决了原有普通软跳线的跳线弧垂过大的问题，充分的减小了跳线弧垂，而且增加了跳线的刚性，由于弧垂的减小，降低了经济成本，增加了安全可靠性。
本专利可以有其他替代方案，比如软跳线，铝管式硬跳线等等，但相比于其他替代方案，本专利无论从安全可靠性来说，还是从对缩小耐张塔塔头，节省工程投资上来说，均是最优的方案。

Claims (2)

1.±800kV直流输电线路双V串鼠笼式刚性跳线，它包括铁塔跳线支架(1)，位于铁塔跳线支架(1)两端的耐张串(2)，其特征在于有二个绝缘子V型串(5)的上端悬吊在铁塔跳线支架(1)上并形成二个三角形结构，二个耐张串(2)的两端分别连接有形成封闭结构的六分裂跳线(4)，两端的六分裂跳线(4)之间通过六分裂跳线间隔棒(3)支撑开，中部的六分裂跳线(4)中间有鼠笼式箍架(7)，中部的六分裂跳线(4)通过的抱箍式跳线间隔棒(6)支撑开，所述的二个绝缘子V型串(3)的下端固定在鼠笼式箍架(2)上。
2.根据权利要求1所述的±800kV直流输电线路双V串鼠笼式刚性跳线，其特征在于所述的绝缘子V型串(5)由二个呈V型结构的复合绝缘子(10)，位于复合绝缘子(10)上端的联结金具(8)，连接二个复合绝缘子(10)下端的U形挂环(9)，位于U形挂环(9)下端的联结金具(8)组成。
CN 201120286259 2011-08-09 2011-08-09 ±800kV直流输电线路双V串鼠笼式刚性跳线 Expired - Lifetime CN202159945U (zh)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105140867A (zh) * 2015-09-08 2015-12-09 江东金具设备有限公司 一种铸造型抱箍式跳线间隔棒
CN108288842A (zh) * 2017-01-07 2018-07-17 江苏天南电力器材有限公司 一种分体式抱箍间隔棒
CN109449867A (zh) * 2018-10-17 2019-03-08 国家电网有限公司 ±1100kv直流线路耐张塔避雷器装置及拆装方法

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105140867A (zh) * 2015-09-08 2015-12-09 江东金具设备有限公司 一种铸造型抱箍式跳线间隔棒
CN108288842A (zh) * 2017-01-07 2018-07-17 江苏天南电力器材有限公司 一种分体式抱箍间隔棒
CN109449867A (zh) * 2018-10-17 2019-03-08 国家电网有限公司 ±1100kv直流线路耐张塔避雷器装置及拆装方法

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