简体中文
安装在HVDC线路中的绝缘子必须维持独一无二及特定的应力条件，这些条件与产生离子迁移、热破坏、积污及金属配件腐蚀的单向电场和电流有关。
在直流环境下要获得最佳性能并应对上述4种直流约束条件，塞迪维尔早在20世纪80年代中期就率先开发了具有以下特征的独有直流绝缘子：
- 高电阻率钢化玻璃(HRTG)的化学成分能够阻断离子流
- 优化的绝缘子设计，具有更长的漏电距离，以增强抗污秽性能并保护金属配件免受电解腐蚀
- 利用特殊的制造工艺生产纯度极高的玻璃，使其对离子积聚的敏感性降低
这种绝缘子的开发在很大程度上促进了业内建立高性能基准，包括后来在IEC 61325中引入的特定标准，该标准依然是描述HVDC性能要求的唯一国际标准。
绝缘子系列
直流应用的特定条件要求经设计的绝缘子能够降低单向电场产生的过多积污。在直流应用中，塞迪维尔建议选择具有能够减少积污的自清洁性能的玻璃伞型。
建议的伞型：
耐污型
适合在严重污秽地区工作
空气动力型
适合在沙漠区域和冰区“插花”使用
外伞型
适合在有固体污染物的严重污秽地区工作
机械额定值
70 kN~840 kN
塞迪维尔广泛的全球直流HVDC应用经验
- 在HVDC应用领域有50多年的经验
- 在全球最负盛名的HVDC输电线路（高达800 kV）中已安装超过11万个塞迪维尔绝缘子
1. ±300 kV DC, Denmark-Sweden,Konti-Skan 1;2 and 3, 1965/1988
2. ± 260 kV DC, Canada, Vancouver Islands 42km, 1967
3. ±200 kV DC, Italy-France, Corsica-Sardinia-Italy 264 km, 1967/1992
4. ± 500 kV DC, USA, Pacific Intertie 1 360 km, 1969/2014/2017-2019
5-6-7. ±450&500 kV DC, Canada, Kettle Winnipeg Nelson River, 2×870 km Bipole I, II,& Bipole III, 1.364 km, 1972 & 2014-15
8. ± 250&350 kV DC, Denmark-Norway, Skagerrak 217 km, 1&2;3 1975/1993
9. ±500 kV DC, USA, Dickinson – Coal Creek 687km, 1978
10. ±500 kV DC, Mozambique, Cahora Bassa 1 420 km, 1978
11. ± 500 kV DC, USA, New England 85 km, 1984
12. ± 450 kV DC, Canada, Quebec- New England, 1 100 km, 1988
13-14. ±600 kV DC, Brazil, Itaipu 1 & 2, 2 x 800 km, 1984/87
15. ±500 kV DC, India, Rihand Dadri 814 km, 1987
16. ±500 kV DC, Finland-Sweden, Fenno Skan 1&2 136 km, 1988/2009
17. ±350 kV DC, New Zealand, North South Island 535 km, 1990
18. ±500 kV DC, India, Chandrapur Padghe, 752 km, 1997
19. ±400 kV DC, Italy-Greece Interconnection, 110 km, 1999
20. ±500 kV DC, China, Tianshengqiao – Guangzhou 1 050 km, 2001/2004
21. ±500 kV DC, China, Guizhou – Guangdong 1 & 2 2007 km, 2003
22. ±500 kV DC, China, Yunnan – Guangdong 1 418 km, 2008
23. ±500 kV DC, India, Ballia Bhiwadi 780 km, 2008/2009
24. ±500 kV DC, China, Deyang – Baoji 534 km, 2009
25. ±500 kV DC, China, Gezhouba-Shanghai 1 929 km, 2009
26. ±800 kV DC, India, Biswanath Agra 1 825 km, 2010/11/12
27. ±800 kV DC, China, Jinping-Sunan 2 089 km, 2011
28. ±800 kV DC, China, Nuozhadu-Guangdong 1 413 km, 2012
29. ±500 kV DC, China, Xiluodu-Guangdong 1 251 km, 2012
30. ±300 kV DC, Sweden, South-West Link – the Southern part, 2012
31-32. ±600 kV DC, Brazil, Rio Madeira I&II, 2 x 2 500 km, 2012/13
33. ±500 kV DC, Congo DR, Inga-Shaba 1 700 km, 2013/2017
34. ±500 kV DC, Canada, Eastern Alberta, 500 km, 2013
35. ±800 kV DC, China, Hami-Zhengzhou 2 208 km, 2013
36. ± 350 kV DC, Labrador-Newfoundland – Muskrat Falls,1 300 km, 2014
37. ±500 kV DC, China, Jinzhong-Guangxi, 577 km, 2015
38. ±500 kV DC, China, Guanyinyan DC, 700 km, 2015
39. ±800 kV DC, Brazil, Belo Monte I, 2 000 km, 2015-17
40. ±200 kV DC, Canada, Maritime link, 2016
41. ±500 kV DC, Ethiopia-Kenya, Interconnection, 1 045 km, 2016-17
42. ±800 kV DC China, Dianxibei, 1 928 km, 2017
43. ±800 kV DC China, Ximeng-Taizhou, 1 620 km, 2017
44. ±800 kV DC, Brazil, Belo Monte II, 2 300 km, 2017
45. ±800 kV DC, China, Zhalute-Qingzhou, 1 320 km, 2017
46. ± 800 kV DC, China, Shaanbei-Wuhan, 1 135 km, 2019
47. ±800 kV DC, China, Qinghai-Henan, 1 575 km, 2019
48. ±800 kV DC, China, Wudongde-Guangxi, 1 490 km, 2019
49. ±500 kV DC, China, Yunnan-Guizhou Interconnection, 1283 km, 2019
50. ±500 kV DC, Tajikistan-Afghanistan, Sangtuda to Deh Salah, 162 km, 2020
51. ±800 kV DC, China, Baihetan-Jiangsu, 2269km, 2021
52. ±800 kV DC, China, Baihetan-Zhejiang, 2193 km, 2021
2. ± 260 kV DC, Canada, Vancouver Islands 42km, 1967
3. ±200 kV DC, Italy-France, Corsica-Sardinia-Italy 264 km, 1967/1992
4. ± 500 kV DC, USA, Pacific Intertie 1 360 km, 1969/2014/2017-2019
5-6-7. ±450&500 kV DC, Canada, Kettle Winnipeg Nelson River, 2×870 km Bipole I, II,& Bipole III, 1.364 km, 1972 & 2014-15
8. ± 250&350 kV DC, Denmark-Norway, Skagerrak 217 km, 1&2;3 1975/1993
9. ±500 kV DC, USA, Dickinson – Coal Creek 687km, 1978
10. ±500 kV DC, Mozambique, Cahora Bassa 1 420 km, 1978
11. ± 500 kV DC, USA, New England 85 km, 1984
12. ± 450 kV DC, Canada, Quebec- New England, 1 100 km, 1988
13-14. ±600 kV DC, Brazil, Itaipu 1 & 2, 2 x 800 km, 1984/87
15. ±500 kV DC, India, Rihand Dadri 814 km, 1987
16. ±500 kV DC, Finland-Sweden, Fenno Skan 1&2 136 km, 1988/2009
17. ±350 kV DC, New Zealand, North South Island 535 km, 1990
18. ±500 kV DC, India, Chandrapur Padghe, 752 km, 1997
19. ±400 kV DC, Italy-Greece Interconnection, 110 km, 1999
20. ±500 kV DC, China, Tianshengqiao – Guangzhou 1 050 km, 2001/2004
21. ±500 kV DC, China, Guizhou – Guangdong 1 & 2 2007 km, 2003
22. ±500 kV DC, China, Yunnan – Guangdong 1 418 km, 2008
23. ±500 kV DC, India, Ballia Bhiwadi 780 km, 2008/2009
24. ±500 kV DC, China, Deyang – Baoji 534 km, 2009
25. ±500 kV DC, China, Gezhouba-Shanghai 1 929 km, 2009
26. ±800 kV DC, India, Biswanath Agra 1 825 km, 2010/11/12
27. ±800 kV DC, China, Jinping-Sunan 2 089 km, 2011
28. ±800 kV DC, China, Nuozhadu-Guangdong 1 413 km, 2012
29. ±500 kV DC, China, Xiluodu-Guangdong 1 251 km, 2012
30. ±300 kV DC, Sweden, South-West Link – the Southern part, 2012
31-32. ±600 kV DC, Brazil, Rio Madeira I&II, 2 x 2 500 km, 2012/13
33. ±500 kV DC, Congo DR, Inga-Shaba 1 700 km, 2013/2017
34. ±500 kV DC, Canada, Eastern Alberta, 500 km, 2013
35. ±800 kV DC, China, Hami-Zhengzhou 2 208 km, 2013
36. ± 350 kV DC, Labrador-Newfoundland – Muskrat Falls,1 300 km, 2014
37. ±500 kV DC, China, Jinzhong-Guangxi, 577 km, 2015
38. ±500 kV DC, China, Guanyinyan DC, 700 km, 2015
39. ±800 kV DC, Brazil, Belo Monte I, 2 000 km, 2015-17
40. ±200 kV DC, Canada, Maritime link, 2016
41. ±500 kV DC, Ethiopia-Kenya, Interconnection, 1 045 km, 2016-17
42. ±800 kV DC China, Dianxibei, 1 928 km, 2017
43. ±800 kV DC China, Ximeng-Taizhou, 1 620 km, 2017
44. ±800 kV DC, Brazil, Belo Monte II, 2 300 km, 2017
45. ±800 kV DC, China, Zhalute-Qingzhou, 1 320 km, 2017
46. ± 800 kV DC, China, Shaanbei-Wuhan, 1 135 km, 2019
47. ±800 kV DC, China, Qinghai-Henan, 1 575 km, 2019
48. ±800 kV DC, China, Wudongde-Guangxi, 1 490 km, 2019
49. ±500 kV DC, China, Yunnan-Guizhou Interconnection, 1283 km, 2019
50. ±500 kV DC, Tajikistan-Afghanistan, Sangtuda to Deh Salah, 162 km, 2020
51. ±800 kV DC, China, Baihetan-Jiangsu, 2269km, 2021
52. ±800 kV DC, China, Baihetan-Zhejiang, 2193 km, 2021
案例研究