A new transmission link it has commissioned in China sets a new benchmark in voltage levels and transmission capacity, says ABB.
The Swiss firm has put the Xiangjiaba-Shanghai project, the world's first ultrahigh voltage direct current (UHVDC) transmission link, into operation and says that it built the line in 30 months - one year ahead of schedule.
The ±800 kV liek has the capacity to transmit up to 7200 MW of power from the Xiangjiaba hydropower plant in southwest China to Shanghai some 2000 km away. ABB was the main technology supplier to State Grid Corporation of China (SGCC) in the project.
“800 kV UHVDC will play an important role in providing China with access to remote renewable energy, a key focus area for us,” said Zheng Baosen, Executive Vice President, SGCC. “We are extremely pleased with the support and co-operation of ABB and the local Chinese suppliers during the execution of this project which enabled its completion in record time.”
The high-capacity power link consists of a single overhead line and occupies less space than the existing 500 kV system. Transmission losses on the new line are under seven per cent, representing a saving equivalent to the power needs of around one million people in China.
ABB was responsible for overall system design and supplied the main equipment for the project. The scope of delivery included 28 high- and ultrahigh-voltage converter transformers, ten of which were delivered from Sweden and the rest manufactured locally with ABB components and technology.
Other key products delivered include thyristor valves, DC and AC switchyard equipment and the newly developed DCC800 HVDC control system.
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