BEIJING, April 30, 2024 /PRNewswire/ -- Yangzhou-Zhenjiang
DC power transmission project, the first project to convert
in-operation AC transmission lines to DC ones in China, was put into service in east
China's Jiangsu Province on Sunday.
Without changing the main structure of the cross-Yangtze River
transmission towers, State Grid Jiangsu Electric Power Co., Ltd.
upgraded transmission lines between the two cities at different
sides of the river to improve transmission capacity of existing
grids.
As a reproducible example, the project means much for areas with
a large population but limited space for new grids construction as
related AC-DC conversion technologies can solve long-distance power
transmission problems between regional power grids and save much
costs, said Chen Songtao, planning and management director with
construction department of State Grid Jiangsu Electric Power Co.,
Ltd.
Currently, power transmission to south Jiangsu from north Jiangsu dotted by new energy power projects
relies mainly on six cross-Yangtze River transmission corridors.
But increasing power transmission demand and stricter Yangtze River
ecological protection make new corridor building less likely and
improving transmission capacity of existing corridors is more
imperative now.
Compared with AC power transmission lines, DC ones of same
voltage have greater transmission capacity and lower transmission
loss and through AC-DC conversion, the Yangzhou-Zhenjiang
transmission lines now boast a transmission capacity of 1.2 million
kW, introduced Chen.
Apart from capacity expansion, AC-DC conversion of transmission
lines have multiple advantages such as high reliance and economic
efficiency. Taking the cross-Yangtze River section as an example,
its construction period was 5-6 months shorter than that of
building new transmission lines and related investment dropped by
nearly 60 million yuan, added
Chen.
Using smart robots to achieve highly efficient and green
construction, State Grid Jiangsu Electric Power saw related
efficiency much improved than traditional manual construction. Xu
Huaiyu, vice chief engineer of the project said a batch of
engineering resolutions for long-distance transmission line change
and nine innovation achievements have been developed independently
by the company to facilitate the following construction.
After completion of phase II and III of the project, its
transmission capacity is likely to reach 3.60 million kW and
further satisfy the power transmission demand in Jiangsu.
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