CN101136266A - 具有超导性电缆的系统 - Google Patents
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Abstract
本发明提供了一种具有超导性电缆(KA)的系统,电缆由超导性内导体(1)、与内导体同心布置的屏蔽层和在内导体与屏蔽层之间安置的电介质(3)构成。屏蔽层(S)由超导性部分(4)和环绕该超导性部分的、由导电性能良好的材料构成的部分(5)组成,以及屏蔽层在包括用作液态冷却介质的通道的中间空隙(9)情况下被低温恒温器(KR)围绕,低温恒温器由两个彼此同心地延伸的、通过中间空隙(8)相互分隔开的不锈钢管(6,7)构成,中间空隙是抽真空的并设有超级绝缘装置。为了防止金属件的磨损,电缆的由低温恒温器包围的屏蔽层的表面和/或低温恒温器在其内表面设有由耐磨材料制成的滑动层(10),该耐磨材料与钢相比摩擦系数更小。
Description
技术领域
本发明涉及一种具有超导性电缆的系统,该电缆由超导性内导体、与该内导体同心布置的屏蔽层和在内导体与屏蔽层之间安置的电介质构成,其中所述屏蔽层由超导性部分和环绕着该超导性部分的、由导电性能良好的材料构成的部分组成,其中所述屏蔽层在包括用作液态冷却介质的通道的中间空隙情况下被低温恒温器围绕,该低温恒温器由两个彼此同心地延伸的、通过中间空隙相互分隔开的不锈钢管构成,其是抽真空的并设有超级绝缘装置。
背景技术
超导性电缆具有由一种专门材料制成的导电体,该材料在足够低的温度时过渡到超导性状态。由此,一种相应构造的导电体的电阻趋于零。适合的材料例如是YBCO(钇-钡-铜-氧化物)或BiSCCO(铋-锶-钙-氧化物)。为了达到超导性状态,这样一种材料的足够低的温度例如在67K与110K之间。适合的冷却剂例如是氮,氦,氖和氢或这些物质的混合物,这些物质总是液态。
本文开头所述的系统具有超导性电缆,其中冷却介质在运行期间作为浸渍剂也渗入到电介质中。这样一种电缆被称为具有冷电介质的电缆。其出众之处在于,可以传输在高压范围内很高的功率。这样一种电缆由内导体和与该内导体同心地布设的屏蔽件或外导体构成,它们通过电介质(绝缘层)彼此分隔开并保持一定距离。超导性导体例如由YBCO或BiSCCO那样的超导性材料制成的带材构成,这些带材彼此紧挨着以长的匝距围绕一个载体卷绕。对于内导体,载体可以是管子或棒或者是由导电性能良好的材料制成的多股线,载体在短路情况也用涌引导电流。然而,如果在这个元件中看起来没有必要引导短路电流,则载体也可以用一种导电性能差的或不导电的金属制作。电缆的屏蔽件由超导性部分和环绕该超导性部分的、由导电性能良好的材料构成的部分(在下面简称为“导体”)组成。导体在短路情况下又用于引导电流。对于屏蔽件来说电介质用作载体。电介质例如由多层纸和/或用聚丙烯层合的纸构成。为了绝热和为了在包括空气隙的情况下系统的完备,围绕电缆布置低温恒温器,该低温恒温器具有两个彼此套合的不锈钢管子,在两个管子之间布置所谓的超级绝缘装置和间隔支承。在低温恒温器的两个管子之间的空间是真空。
超导性电缆在系统运行时从室温冷却到例如73K的温度。此时,电缆收缩约0.3%。亦即一条600m长的电缆约收缩1.8m。与此相反,低温恒温器由于它的特殊结构在此冷却期间没有或只有微不足道的收缩。因此,在电缆冷却时和″中断″冷却后在它重新加热时导致在低温恒温器与电缆之间的相对运动。电缆的外层、导体由诸如铜或铝那样导电性能良好的金属构成。与低温恒温器内管相比,两种材料的抗磨强度较低。因此,在所阐述的相对运动期间,从导体表面研磨下金属颗粒。这些颗粒可能在电缆或系统的承受电场的范围中,造成诸如终端电缆接头很大的故障,直至导致电击穿,电击穿可能有破坏终端电缆接头的后果。如果低温恒温器的内管横向于它的纵向有波浪形变形,则这种危险就更高,因为由于这种波浪变形发生更高的磨损。
发明内容
本发明要解决的技术问题在于,将本文开头所述的系统设计成,使得可以达到在所述系统的承受电场的范围中没有由于磨损产生的金属颗粒。
根据本发明该技术问题是这样得以解决的,即由低温恒温器包围的电缆导体的表面和/或低温恒温器在其内表面四周设置有耐磨材料的滑动层,该耐磨材料与钢相比摩擦系数更小。
通过滑动层极大地保护了所述由导电性能良好的材料构成的电缆导体免受磨损。在电缆和低温恒温器相对运动时,就没有金属颗粒从中研磨下来。同时,由于减少了两个部件之间的摩擦,在电缆缩短或膨胀时电缆在低温恒温器中的运动变得容易了。
有利地采用青铜作为用于滑动层的耐磨材料,确切地说优选以带材的形式,把青铜带有空隙地围绕电缆的导体缠绕上。
附图说明
在附图中示出了本发明主题的具体实施例。其中:
图1表示按照本发明的系统的横截面,该系统具有带有冷电介质的超导性电缆;
图2表示一种跟图1相比系统略加修改的实施方式。
具体实施方式
在图1和2所示出的系统中,在低温恒温器KR中分别布置具有冷电介质的超导性电缆KA。该电缆KA具有超导性材料的内导体1,该内导体围绕着由导电性能良好的金属例如铜制作的金属芯线2布设。该芯线2可以是心线或多股线。它也可以设计为管件,通过该管件可以在系统运行时导引冷却剂。内导体1由电介质3包围,该电介质由多层纸和/或用聚丙烯合层的纸构成。在电介质3上布置电缆KA的屏蔽层S,该屏蔽层由处于里面的超导性部分4和环绕该超导性部分的、用导电性能良好的金属制成的处于外面的部分5(在下面简称为“导体5”)构成。导体5优选由铜制成。
低温恒温器KR由两个不锈钢管6和7构成,两个管子通过中间空隙8彼此分隔开。它们可以有利地横向于它们的纵向起波浪以及优选地彼此同轴布置。中间空隙8被抽真空并设有超级绝缘装置和间隔支承,间隔支承将两个管子6和7保持在它们的相对的位置中。超级绝缘装置本身可以以公知的方式由很多层用铝气相喷镀的塑料薄膜构成。
电缆KA布置在低温恒温器KR中,确切地说是在中间空隙9敞开的情况下,通过该中间空隙在系统运行时导引如氮那样的处于压力下的冷却剂。冷却剂的压力视边缘条件而界于3巴和20巴之间。在图1所示出的实施例中,电缆KA的导体5由耐磨材料制成的滑动层10环绕,该耐磨材料与钢相比摩擦系数更小,该滑动层直接紧贴在导体5上。它对于冷却剂而言是可通过的,因此冷却剂作为浸渍剂可以渗入到电介质3中。滑动层10的厚度有利地界于0.1mm至0.2mm之间。
用于滑动层10的合适的材料例如是聚四氟乙烯和硫酸钼。然而,对于滑动层10应用青铜是特别有利的。如果将滑动层10敷设到电缆KA上,则滑动层有利地由青铜带构成,将青铜带有空隙地卷绕到导体5上。
根据图2,滑动层10也可以装在低温恒温器KR的内管7的内表面上。也可以,既围绕着电缆KA也在管子7中设置滑动层10。
在系统利用相应的冷却运行时以及在故障情况下和为了利用相应的加热维修而中断系统时,在低温恒温器KR中使电缆KA运动。在电缆KA与低温恒温器KR之间采用滑动层10时,在经过冷却和加热的大量的这类周期之后也不再强调磨损。
Claims (5)
1.一种具有超导性电缆的系统,该电缆由超导性内导体、与该内导体同心布置的屏蔽层和在内导体与屏蔽层之间安置的电介质构成,其中所述屏蔽层由超导性部分和环绕着该超导性部分的、由导电性能良好的材料构成的部分组成,其中所述屏蔽层在包括用作液态冷却介质的通道的中间空隙情况下被低温恒温器围绕,该低温恒温器由两个彼此同心地延伸的、通过中间空隙相互分隔开的不锈钢管构成,其是抽真空的并设有超级绝缘装置,其特征在于,所述电缆(KA)的由低温恒温器(KR)包围的屏蔽层(S)的表面和/或低温恒温器(KR)在其内表面设有由耐磨材料制成的滑动层(10),该耐磨材料与钢相比摩擦系数更小。
2.如权利要求1的系统,其特征在于,所述滑动层(10)由青铜制成。
3.如权利要求1或2的系统,其特征在于,包围所述电缆(KA)的屏蔽层(S)的滑动层(10)对于冷却剂而言是可透过的。
4.如权利要求3的系统,其特征在于,所述滑动层(10)由有空隙地围绕电缆(KA)屏蔽层(S)缠绕的青铜带构成。
5.如权利要求1至4中任一项的系统,其特征在于,至少所述低温恒温器(KR)的朝向电缆(KA)的屏蔽层(S)的内管(7)是横向于它的纵方向起波浪的。
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EP2369218B1 (de) * | 2010-03-16 | 2012-08-22 | Nexans | Anordnung mit einem supraleitfähigen Kabel |
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2006
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- 2006-08-08 DK DK06291287T patent/DK1887584T3/da active
- 2006-08-08 EP EP06291287A patent/EP1887584B1/de not_active Not-in-force
- 2006-08-08 DE DE502006001146T patent/DE502006001146D1/de active Active
- 2006-08-08 ES ES06291287T patent/ES2307271T3/es active Active
-
2007
- 2007-07-12 US US11/827,654 patent/US20160351304A1/en not_active Abandoned
- 2007-07-17 US US11/879,476 patent/US8037705B2/en not_active Expired - Fee Related
- 2007-07-27 JP JP2007195376A patent/JP5154854B2/ja not_active Expired - Fee Related
- 2007-08-08 KR KR1020070079833A patent/KR101314789B1/ko active IP Right Grant
- 2007-08-08 CN CN2007101821585A patent/CN101136266B/zh not_active Expired - Fee Related
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CN102148074A (zh) * | 2009-10-30 | 2011-08-10 | 尼克桑斯公司 | 具有至少一根超导电缆的系统 |
CN102163831A (zh) * | 2009-11-26 | 2011-08-24 | 尼克桑斯公司 | 具有至少一条超导电缆的装置的操作方法 |
CN102163831B (zh) * | 2009-11-26 | 2015-03-25 | 尼克桑斯公司 | 具有至少一条超导电缆的装置的操作方法 |
CN102254618A (zh) * | 2010-05-10 | 2011-11-23 | 尼克桑斯公司 | 带有超导电缆的输电系统 |
CN102385955A (zh) * | 2010-09-02 | 2012-03-21 | 尼克桑斯公司 | 有至少一条超导性电缆的装置 |
CN102385955B (zh) * | 2010-09-02 | 2016-01-13 | 尼克桑斯公司 | 有至少一条超导性电缆的装置 |
CN102680750A (zh) * | 2012-04-24 | 2012-09-19 | 中国科学院电工研究所 | 一种用于远程微弱模拟信号传输的超导信号传输电缆 |
CN102680750B (zh) * | 2012-04-24 | 2014-12-24 | 中国科学院电工研究所 | 一种用于远程微弱模拟信号传输的超导信号传输电缆 |
US11075508B2 (en) | 2017-05-31 | 2021-07-27 | Jfe Steel Corporation | Thermal-insulated multi-walled pipe for superconducting power transmission and laying method therefor |
Also Published As
Publication number | Publication date |
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EP1887584A1 (de) | 2008-02-13 |
ES2307271T3 (es) | 2008-11-16 |
CN101136266B (zh) | 2011-11-09 |
ATE401654T1 (de) | 2008-08-15 |
JP2008041661A (ja) | 2008-02-21 |
JP5154854B2 (ja) | 2013-02-27 |
DK1887584T3 (da) | 2008-10-27 |
US8037705B2 (en) | 2011-10-18 |
US20100029488A1 (en) | 2010-02-04 |
KR101314789B1 (ko) | 2013-10-08 |
DE502006001146D1 (de) | 2008-08-28 |
US20160351304A1 (en) | 2016-12-01 |
KR20080013821A (ko) | 2008-02-13 |
EP1887584B1 (de) | 2008-07-16 |
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