Ultra-high voltage (UHV) refers to transmission technology with a voltage class of 1000 kV and above for AC and ±800 kV and above for DC, which not only greatly enhances the power transmission capability of China's power grid but also contributes to optimizing the layout of power grids and power sources in China, promoting coordinated development of the power industry as a whole and regional economies. Therefore, China has introduced several policies to promote the continuous development of the UHV industry. As of now, State Grid has put into operation and is constructing 31 UHV transmission projects with a line length reaching 41,000 kilometers and a transformation (conversion) capacity exceeding 450 million kVA (kW). UHV has become a new calling card for the State Grid.

As a leading enterprise with 36 years of experience in the cable industry, Far East Smart Energy Co., Ltd. (referred to as: Far East Shares Stock Code: 600869), through its subsidiary Far East Cable Co., Ltd. (referred to as: Far East Cable), started the research and production of UHV conductors in 2006. After years of efforts, it has accumulated extremely rich experience in the design, R&D, and laying of UHV products, overcome numerous technical challenges, broken foreign technological monopolies multiple times, solved the "bottleneck" problems for the industry's development, and witnessed the leapfrog development of China's UHV.

The Changji - Guquan ±1100 kV UHVDC Transmission Project

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

Highest Voltage Level:

It is the world's first line using ±1100 kV DC transmission voltage level, with transmission losses of only 1.5% per thousand kilometers.

Largest Transmission Capacity:

With a transmission power of 12 million kW, it can transmit 66 billion kWh of electricity to East China annually. At this power, it could light up 400 million 30-watt bulbs.

Longest Transmission Distance:

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

Most Advanced Technology Level:

For the construction of this project, key equipment such as ±1100 kV converter transformers and converter valves were successfully developed, and the world's first indoor ±1100 kV DC field and on-site assembly scheme for sending-end converter transformers were adopted.

The Changji - Guquan ±1100 kV UHVDC transmission project not only set a new height for global power grid technology but also opened a new era for the development of UHV transmission technology, providing significant demonstration effects for the development of the global energy internet.

In response to this super project, Far East, as a core product supplier, actively participated in the construction of the Changji - Guquan ±1100 kV UHVDC transmission project, overcoming harsh environmental conditions, technical bottlenecks, stringent indicators, and other difficulties. It provided all-round and full-cycle services including solution design, product selection, installation guidance, and on-site testing.

Technically speaking, considering that the areas along the project are mainly deserts, gravel plains, and mountainous regions with harsh climatic and geographical environments, Far East's intelligent cable products use top-tier UHVDC transmission project technologies worldwide, breaking through the technical bottlenecks of large cross-section energy-saving series conductors. The electrical performance, mechanical properties, and other parameters have relatively high margins, meeting the strictest performance index requirements while ensuring system safety, reliability, and stability during operation. In terms of service, Far East specially formed a technical service team to participate in the system design phase of the project, providing comprehensive solutions and demonstrating a five-star professional service level.

Indeed, Far East had long been engaged in the R&D and production of UHV conductors, successively developing a series of products like 1250 m㎡ conductor, low wind pressure conductor, carbon fiber composite core heat-resistant aluminum alloy conductor, aluminum tube supported heat-resistant aluminum alloy expanded busbar, ultra-high strength large span conductor, carbon fiber composite core semi-hard aluminum stranded wire JLZ1X1/F1A-1660/95, carbon fiber composite core expanded conductor, and high conductivity aluminum-clad aluminum alloy conductor JL3/LHA1-935/415. These products adopt energy-saving, environmentally friendly materials, and advanced production processes, featuring characteristics suitable for high altitude, large capacity, low loss, and long-distance power transmission, leading the development of smart cables in the UHV transmission field.

Relying on first-class R&D capabilities, superior quality, and a complete sales service system, Far East has repeatedly won bids for national major projects, serving key power projects such as the Shanghai Temple - Shandong ±800 kV UHVDC transmission project, Qinghai - Henan UHVDC project, Northern Shaanxi - Wuhan UHVDC project, Tibet Nyima 110 kV transmission and transformation project, Fujian Sanming Raoshan (Jianning) 220 kV transmission and transformation project, covering virtually all UHV line constructions in China. Additionally, Far East actively integrates into the "Belt and Road" initiative, continuously providing leading UHV products and technical solutions to countries along the "Belt and Road".

With the official launch of the "14th Five-Year Plan", UHV will undoubtedly be a major focus in infrastructure construction, with high-voltage transmission and distribution equipment and wires and cables facing enormous market potential. In the future, Far East will leverage its leading core technologies and brand advantages in the UHV field to participate in more UHV projects, continuously increasing its market share and supporting the construction of China's "power highways" with timely and ultimate products and services.