A 1000KV gas-insulated transmission line (GIL) utility tunnel project, a 
signature project of the State Grid Corporation of China, has recently gone 
into service in east China, further consolidating the company's leading 
position in the world's ultra-high-voltage (UHV) power transmission field.

Constructed by State Grid's subsidiary in Jiangsu Province, the project linking 
Suzhou and Nangtong, two cities of Jiangsu Province, boasts the world's highest 
voltage, largest power transmission capacity as well as longest distance over 
the most complex landscapes and marks UHV line's first cross through river 
tunnels in the world.

Photo - https://photos.prnasia.com/prnh/20190927/2594274-1 
(Photo caption: The Suzhou-Nantong GIL utility tunnel project)

The project adopts world-leading 1000KV GIL technology, making a major 
technical innovation in the UHV power transmission field.

With the single-phase GIL 5.8 kilometers long and six-phase GIL totaling 35 
kilometers, the project provides brand-new method of choice for the changing 
demands amid energy revolution.

As a safe and flexible alternative to overhead lines, GIL is gaining importance 
due to its less landscape impact and minimal electromagnetic radiation.

Also, with the power grid being more and more fed with fluctuating renewable 
energy sources under global green drive and due to the fact that most 
generation is remote from the load centers, it has become essential to 
reinforce and innovate transmission network.

The GIL project is well placed in power-thirsty Jiangsu province to complete a 
UHV AC ring network in east China regions, improving power acceptance capacity 
to 69.80 million kw thus better receive power through existing lines such as 
the Zhundong (Xinjiang)-Wannan (Anhui) line carrying power from China's west to 
east.

But creating such a vast electrical system demands meticulous attention to 
details, and innovation is embedded at the core to fill industry blanks with 
unprecedented attempts. By staging 129 inventions and utility model patents, 18 
technical standards as well as self-developed installation and engineering 
specifications, the GIL project provides valuable reference for world energy 
connectivity and energy tunnel construction intervened by mountain and ocean 
scenarios.

The project also pilots application of ubiquitous power Internet of Things 
(IoT) to establish a control system that is flexible, functional and 
intelligent and is expected to realize equipment diagnosis automation and 
personnel intelligent control to further ensure safe operation.

Acting as the center for energy collection, transmission, conversion and 
utilization with better performance and safety control, the GIL itself 
showcases the power baron's vision of becoming a world-class energy 
interconnection enterprise that services as a hub and a platform for shared 
benefits along with its journey of coordinating a strong smart grid with 
ubiquitous power IoT construction.

As world's largest utility company, State Grid serves a population of more than 
1.1 billion worldwide with its power service. 

See the original link: https://en.imsilkroad.com/p/308570.html

Source: Xinhua Silk Road Information Service

Image Attachments Links:

   Link: https://iop.asianetnews.net/view-attachment?attach-id=346325

   Caption: The Suzhou-Nantong GIL utility tunnel project