ABB Wins $100 Million ultra high-voltage Direct Current Deal in China

ABB, the leading power and automation technology group, has won orders worth over $100 million to supply converter transformers and components including wall bushings and circuit breakersfor the Lingzhou-Shaoxing ultrahigh-voltage direct current (UHVDC) transmission link in China. The link will be the 7th 800 kilovolt (kV) UHVDC transmission system in the country and will help to deliver more electricity from remote power plants in China's interior to growing urban areas, over longer distances with fewer losses. The order was booked in the first quarter of 2015.

The long-distance Lingzhou-Shaoxing (LingShao) +/- 800 kilovolt (kV) UHVDC transmission project will transfer 8,000 megawatts (MW) of power from Lingzhou in the northwestern Ningxia region to Shaoxing in the eastern Zhejiang province, stretching over a distance exceeding 1,700 kilometers.

This will be the world's first 750 kV ultra-high-voltage alternating current (AC) to 800 kV UHVDC connection, an innovation that enhances the efficiency and capacity of long-distance UHV electricity delivery systems necessary for China's growing economy. The products provided by ABB are scheduled to be commissioned in 2016.

"Ultra-high-voltage technology makes it possible to transmit greater amounts of power across greater distances, with minimum losses and without compromising on reliability," said Bernhard Jucker, president of ABB Power Products division. "This innovative solution will enable the world's first AC to UHVDC connection and will help reduce environmental impact on residents of urban areas."

ABB has been able to overcome this challenge thanks to its novel UHVDC transformer technology capable of supplying the converters with electricity from a 750 kV AC grid, instead of the traditional 500 kV. Increasing AC voltage before it is converted to DC yields a substantial additional benefit by reducing electricity losses within the AC collecting grid.


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