CN1205621C - 发电机和变压器用柔软高压绕组电缆 - Google Patents

发电机和变压器用柔软高压绕组电缆 Download PDF

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CN1205621C
CN1205621C CN 03115263 CN03115263A CN1205621C CN 1205621 C CN1205621 C CN 1205621C CN 03115263 CN03115263 CN 03115263 CN 03115263 A CN03115263 A CN 03115263A CN 1205621 C CN1205621 C CN 1205621C
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cable
shielding layer
conductor
insulation
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CN1431665A (zh
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张秀松
吴祥明
曾纪刚
黄靖宇
王佩龙
田义龙
刘旌平
毛伟杰
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Tongji University
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NATIONAL RESEARCH CENTER OF MAGNETIC SUSPENSION TRANSPORTATION ENGINEERING TECHN
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Abstract

一种发电机和变压器用柔软高压绕阻电缆,包括中心导体、在该中心导体外包覆有导体屏蔽层、绝缘层和绝缘屏蔽层,其特点是所述导体屏蔽层、绝缘层和绝缘屏蔽层是以二元乙丙橡胶为主的材料制成的;在所述绝缘屏蔽层之外还包覆有铜丝屏蔽层和导电护套。本发明电缆具有柔软性好、机械强度高的特点。

Description

发电机和变压器用柔软高压绕组电缆
技术领域:
本发明与发电机和磁悬浮列车有关,特别是一种发电机和变压器用柔软高压绕组电缆。
背景技术:
云母/环氧树脂、油/纤维素纸统治旋转电机和电力变压器的绝缘系统已有100多年历史。近几年来,发电机和变压器开始引入一种新的绝缘概念—用电力电缆作为变压器的高压绕组和旋转电机的定子绕组。这种新概念的绝缘推出了高压发电机(PowerformerTM)、新型风力发电系统(WindformerTM)和新型变压器(DfyformerTM)等一系列有良好发展前景的新型电机,也使新型高速轨道交通—磁悬浮列车成为可行。
目前作为发电机和变压器高压绕组用的电缆多是交联聚乙烯绝缘电缆,但是不需要金属屏蔽和护套。该高压绕组电缆仅由导体1、导体屏蔽层2、绝缘层3和绝缘屏蔽层4组成,如图1所示。
这种结构的电缆用作高压绕组至少存在以下不足:
●交联聚乙烯绝缘柔软性不够,电缆的弯曲直径至少20余倍于电缆外径,使用局限性较大。
●没有金属屏蔽和护套的电缆机械强度不够。为避免因振动而引起外半导电层的磨损,在电缆和绕组槽壁之间的间隙需垫入硅橡胶三角带,使电缆绕组牢固地固定在槽内。这样的绕组结构复杂并降低了电缆的载流量。
发明内容:
本发明要解决的技术问题在于克服上述已有交联聚乙烯绝缘电缆的不足,提供一种发电机和变压器用柔软高压绕组电缆,既具有绕组时电缆必备的柔软性能和机械强度。
本发明的技术解决方案如下:
一种发电机和变压器用柔软高压绕组电缆,包括中心导体、在该中心导体包覆有导体屏蔽层、绝缘层、绝缘屏蔽层和导电护套,所述导体屏蔽层、绝缘层和绝缘屏蔽层是以二元乙丙橡胶为主的材料制成的,其特点是:在所述绝缘屏蔽层和导电护套之间包覆有铜丝屏蔽层。
本发明的技术效果:
●电气性能:a)与传统使用的交联聚乙烯绝缘高压绕组电缆有同等电气强度;
b)电气性能全面符合IEC60502-1997《额定电压1KV(Um=1.2KV)~30KV(Um=36KV)挤包绝缘电缆及附件》要求。
●弯曲性能:a)弯曲直径≥6D(D是电缆外径),作为例子,图2的电缆弯曲直径为240mm;
b)极限弯曲直径1.5D(D是电缆外径),在低温-25℃下,弯曲直径为1.5D,经过10次弯曲后,电缆的屏蔽、绝缘及它们的界面能保持完好状态—不开裂、不起壳。
附图说明:
图1是已有的用于发电机和变压器绕组的交联聚乙烯绝缘电缆结构示意图。
图2是本发明用于发电机和变压器绕组的柔软高压绕组电缆结构示意图。
具体实施方式:
请参阅图2,由图可见,本发明发电机和变压器用柔软高压绕组电缆自内至外依次由中心导体1、导体屏蔽层2、绝缘层3、绝缘屏蔽层4、铜丝屏蔽层5和导电护套6构成,所述导体屏蔽层2、绝缘层3和绝缘屏蔽层4是以二元乙丙橡胶为主的材料制成的,由于二元乙丙橡胶具有柔软的特性,使本发明电缆较交联聚乙烯绝缘电缆的弯曲性能大为改善,弯曲直径一般≥6D,其D为电缆外径,极限弯曲直径为1.5D,而且在低温-25℃下,多次弯曲不开裂,不起壳。
电气强度同交联聚乙烯绝缘电缆。电气性能全面符合IEC60502-1997《额定电压1KV(Um=1.2KV)~30KV(Um=36KV)挤包绝缘电缆及附件》要求。

Claims (1)

1、一种发电机和变压器用柔软高压绕组电缆,包括中心导体(1)、在该中心导体(1)外包覆有导体屏蔽层(2)、绝缘层(3)、绝缘屏蔽层(4)和导电护套(6),所述导体屏蔽层(2)、绝缘层(3)和绝缘屏蔽层(4)是以二元乙丙橡胶为主的材料制成的,其特征在于:在所述绝缘屏蔽层(4)和导电护套(6)之间包覆有铜丝屏蔽层(5)。
CN 03115263 2003-01-29 2003-01-29 发电机和变压器用柔软高压绕组电缆 Expired - Lifetime CN1205621C (zh)

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Publication number Priority date Publication date Assignee Title
CN100365738C (zh) * 2005-01-26 2008-01-30 上海磁浮交通工程技术研究中心 一种中压绕组电缆
CN1929042B (zh) * 2005-09-05 2010-05-05 远东电缆有限公司 耐高温防腐蚀高压软电缆
CN104538095A (zh) * 2015-01-13 2015-04-22 青岛华高能源科技有限公司 一种石墨烯复合橡胶质的屏蔽型软电缆

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