Recently, the Baihetan-Zhejiang ±800 kV UHV DC project designed by China Energy Engineering Anhui Institute has successfully completed the Chizhou Yangtze River span.

The Baihetan-Zhejiang UHV DC line project (hereinafter referred to as the Baizhe line) is a key project in the strategic deployment of China's west-to-east power transmission.

The north and south banks of the Chizhou Yangtze River Great Span Project are located in Guichi District, Chizhou City, Anhui Province and Zongyang County, Tongling City respectively. The height of the spanning tower is 345 meters, and the weight of the single-base spanning tower tower is 5107 tons (including the elevator shaft).

A total of 36 JLHA1/G6A-500/280 super-strength steel-core high-strength aluminum alloy stranded wires need to be erected for the large-span AC and DC towers of the Baizhe Line in Chizhou Yangtze River, which is three times the number of conductors in general DC large-span projects. A single wire weighs 14.8 tons. The number of conductors is the largest in history. The total weight of the single-base spanning tower is 7,494 tons (5,107 tons of steel and 2,387 tons of concrete for the tower body), and the basic force exceeds 10,000 tons. A number of new technologies have been applied to UHV engineering for the first time.Editor/Ma Xue