EHV power cables and overhead lines and attachment Development Status – cables,
Past two decades, through the introduction of foreign set of technologies, equipment and raw materials, China Power cable Already have high-volume manufacturing industrial continuous production from 1kV to 220kV voltage class size and species of all kinds of XLPE power cable capacity, the product can not only satisfy domestic demand, and some for export. Product quality and implementation of domestic cable standard for integration with the world advanced level, most enterprises have passed ISO9000 quality system certification, for the urban and rural power grids to provide a large number of high-quality products.
2007 3 1, the China began implementation of the new domestic investment projects approved equipment shall be in accordance with the Ministry of Finance announced the import of "non-domestic duty-free imports of investment goods catalog (2006 Amendment)", which, 500kV and The following overhead wires, ± 250kV and below, and below 220kV DC cable and XLPE insulated cables are no longer duty-free imports. This requirement to protect the interests of domestic cable companies own cable technology and development of great practical and historical significance.
However, from the new "no duty-free import of goods catalog" view of the provisions of the three categories of products, 500kV overhead wires above, ± 250kV and 500kV DC cable above XLPE insulated cable will remain the import situation. This is for the cable industry in China put forward new tasks: Next struggling to enter the super- High pressure Cable in the field. China Cable Network All rights reserved Please indicate to to Chinese Cable Network
In fact, our more than 500kV overhead conductors, including the 750kV level and 1000kV grade wire manufacturing technology is being continually develop and improve; also have several factories in efforts to develop 500kV XLPE cables, and has achieved gratifying results. Only EHV DC cables, the use of limited research and development have not yet put into force. I believe in the near future, China will have a sufficient condition for manufacturing extra high voltage cables, into EHV power cable manufacturing technology.
Our high voltage XLPE cable technology and advanced level there is still gap between the UHV Wire & Cable The development is almost empty, almost none of the current domestic cable manufacturers have the capacity to produce such high-voltage products.
Many of our large-scale hydropower or Pumped Storage Power Station have been imported using 500kV power cable, for example, Tianhuangping Pumped Storage Power Station, Zhejiang, Sichuan Ertan Hydropower Station, etc..
Our medium voltage XLPE cables have all been made of, 110kV XLPE cables have almost entirely domestically, 220kV XLPE cables Even with manufacturing capacity, but unfortunately there are some users keen on imported products. While many cable companies claim to manufacture 500kV XLPE cable, some cable companies are also building new production lines, but, 500kV XLPE cables still all imports. So the question is raised whether our country can become a 500kV XLPE power it?
500kV XLPE insulated EHV cables, is the global polymer insulated power cables of the highest voltage levels, as claimed by some companies and 1000kV 750kV XLPE cable, but is only good wishes.
Review of global history of EHV XLPE cables, it is easy to see, manufacture EHV XLPE cables is not as simple as people imagine. Development from the 220kV XLPE cables to 500kV, from materials to cable manufacturing equipment, technology and testing and other links, have made great efforts.
Has been put into operation the various voltage levels of cross-linked cable, the maximum amount is 220kV XLPE cable, followed by the 230kV, 245kV and 400kV cables. 345-500kV oil-filled cables are still a large proportion of the 500kV XLPE cables only Japan and China in use.
Still used in China still imports 500kV cross-linked, mainly imported from Japan, for large hydroelectric power stations and pumped storage power station, there is no city network to use the records of 500kV XLPE cable.
I am an expert from chinacervicalcollar.com, while we provides the quality product, such as inflatable cervical collar manufacturer , china first aid splint, cervical collar,and more.
Processing your request, Please wait....
