UHV (Ultra-High Voltage) refers to transmission technology with a voltage level of 1000kV and above for alternating current (AC) and ±800kV and above for direct current (DC). It not only greatly improves the transmission capacity of China's power grid but also helps optimize the layout of the power grid and power sources, promoting the coordinated development of the overall power industry and regional economies. Therefore, China has issued a number of policies to drive the sustainable development of the UHV industry. Up to now, State Grid Corporation of China has put into operation and under construction 31 UHV transmission projects with a total line length of 41,000 kilometers and a transformer (converter) capacity exceeding 450 million kVA (kW). UHV has become a new calling card of State Grid.

As a leading enterprise deeply engaged in the cable industry for 36 years, Far East Cable Co., Ltd. (Far East Cable), a subsidiary of Far East Smarter Energy Co., Ltd. (Far East Energy, Stock Code: 600869), has been engaged in the R&D and production of UHV conductors since 2006. After years of efforts, it has accumulated extremely rich experience in the design, R&D, and laying of UHV products, overcome multiple technical challenges, repeatedly broken foreign technological monopolies, solved the "bottleneck" problems for the industry's development, and witnessed the leapfrog development of China's UHV industry.

Changji-Guquan ±1100kV UHVDC Transmission Project

Take the Changji-Guquan ±1100kV UHVDC Transmission Project as an example. As the second UHV transmission project for "Xinjiang Power Transmission", the Changji-Guquan ±1100kV UHVDC Transmission Project was officially put into operation on September 26, 2019. It is the world's first ±1100kV UHVDC project and boasts four "world's best":

Highest Voltage Level:

It is the world's first transmission line adopting the ±1100kV DC voltage level, with a transmission loss of only 1.5% per 1,000 kilometers.

Largest Transmission Capacity:

With a transmission capacity of 12 million kilowatts, it can deliver 66 billion kWh of electricity to East China every year. At this power level, it can light up 400 million 30-watt electric lamps.

Longest Transmission Distance:

The total length of the line is 3,293 kilometers, making it the longest UHV transmission project in the world.

Most Advanced Technical Level:

For the project construction, key equipment such as ±1100kV converter transformers and converter valves were successfully developed. It is the first to adopt the ±1100kV indoor DC yard and the on-site assembly scheme of sending-end converter transformers.

The Changji-Guquan ±1100kV UHVDC Transmission Project has not only set a new height in the world's power grid technology but also opened a new era for the development of UHV transmission technology, playing a major demonstration role in the development of the global energy internet.

Facing this super project, as a core product supplier, Far East actively participated in the construction of the Changji-Guquan ±1100kV UHVDC Transmission Project. It overcame many difficulties including harsh environments, technical bottlenecks, and stringent indicators, providing all-round and full-cycle services for the project such as scheme design, product selection, installation guidance, and on-site testing.

Technically, in response to the harsh climatic and geographical conditions along the project route, which is dominated by deserts, Gobi, and mountainous areas, the intelligent cable products provided by Far East adopted world-top key technologies for UHVDC transmission projects, breaking through the technical bottleneck of large-cross-section energy-saving conductors. Their electrical and mechanical performance parameters have a high margin, meeting both the strictest performance requirements and the safety, reliability, and stability requirements of the operating system. In terms of service, Far East specially set up a technical service team to participate in the system design of the project, providing comprehensive solutions for project operation and demonstrating five-star professional service standards.

In fact, Far East has long been engaged in the R&D and production of UHV conductors, and has successively developed a series of products including 1250mm² large-cross-section conductors, low-wind-pressure conductors, carbon fiber composite core high-elongation heat-resistant aluminum alloy conductors, carbon fiber composite core high-elongation hard aluminum conductors, aluminum tube-supported heat-resistant aluminum alloy profile expanded busbars, ultra-high-strength long-span conductors, JLZ1X1/F1A-1660/95 carbon fiber composite core semi-hard aluminum profile stranded conductors, carbon fiber composite core expanded conductors, and JL3/LHA1-935/415 aluminum alloy core high-conductivity aluminum stranded conductors. These products adopt energy-saving and environmentally friendly materials and advanced production technology, featuring high-altitude, large-capacity, low-loss, and long-distance power transmission, leading the development of intelligent cables in the UHV transmission field.

Relying on first-class R&D capabilities, excellent quality, and a complete sales and service system, Far East has repeatedly won bids for major national projects, serving key power projects such as the Shanghai Temple-Shandong ±800kV UHVDC Transmission Project, Qinghai-Henan UHVDC Project, Northern Shaanxi-Wuhan UHVDC Project, Xizang Nima 110kV Power Transmission and Transformation Project, and Fujian Sanming Raoshan (Jianning) 220kV Power Transmission and Transformation Project, undertaking almost all domestic UHV line constructions. In addition, Far East has actively integrated into the "Belt and Road" construction, continuously providing leading UHV products and technical solutions for regions along the "Belt and Road".

With the official launch of the 14th Five-Year Plan, UHV will surely become a key part of infrastructure construction, and high-voltage power transmission and distribution equipment, wires and cables and other products will embrace a huge market. In the future, Far East will participate in more UHV project constructions with leading core technologies and brand advantages in the UHV field, continuously increase market share, and support the construction of the national "power expressway" with timely and superior products and services.