干式变压器在中国的发展 -word文档网

摘要·······························································2

一、前言···························································3

二、干式变压器的分类···············································4

1、SF6气体绝缘干式变压器··········································5

2、环氧树脂真空浇注变压器·········································5

3、环氧树脂缠绕工艺干式变压器·····································6

4、树脂浇注干变的技术发展和其顽症树脂加填料浇注干变···············7

5、多领域多用途发展的变压器·······································8

6、采用NOMEX&reg纸绝缘规范类干式变压器···························10

6．1我们了解了NOMEX®纸的性能，就可以清楚地知道这种变压器的特点··10

6．2杜邦®ReliatraN®技术《OVDT》敞开式干式变压器···········13

6．3杜邦®ReliatraN®技术《VDT》包封式干式变压器···········14

6．4这两种杜邦®ReliatraN®技术变压器除了有其自身的特点外，还

一些共同的特点···············································15

6、其他类························································16

三、可以发展的新品种·············································17

总结······························································17

参考文献··························································18

致谢·····························································18

摘要

概述一个世纪前最早出现的变压器是干式变压器.由于这种变压器容量不能做大,电压无法做高,技术上受到了极大的限制.20世纪80年代末，干式变压器从国外进入中国。在20世纪50～60年代,中国出现了B级绝缘敞开式通风冷却干式变压器(国外被称为OVDT),这种干式变压器由于材料价格高、性能差、可靠性低和故障率高,没有得到进一步发展.其实在当时,国外已经出现了环氧树脂和NOMEX纸.于是,在欧洲就开发了环氧树脂浇注干式变压器,美国开发了用NOMEX纸作绝缘的OVDT敞开式通风冷却干式变压器,接着法国采用美国杜邦公司的NOMEX绝缘纸开发出SECURAMID(赛格迈)VDT包封式通风冷却干式变压器。

干式变压器至今每年以超过20%的增长率迅猛发展。2002年全国产销量约18,000MVA，成为世界上干变不销量最大的国家之一。据有关部门不完全统计，全国干式变压器生产厂有50多家，但其发展很不平衡：产销量排前五名的厂，约占全国总产销量的62%，前十名厂约占全国总产销量的80%；年产量在100MVA以上的厂21家（面对如此激烈的市场竞争，年产量在100MVA以下的厂，求得生存和发展是极其艰难的）。目前，全球产销量第一的厂商为顺德特种变压器厂，从全球范围看，我国的干式变压器生产技术和生产工艺已经达到世界领先水平，并且拥有自主的知识产权，具有很强的竞争力。2002年产销量已超4,200MVA，加入WTO之后，随着开放程度的进一步提高，这一领域出现了更为广阔的市场空间。