Each of the two 800kV links is designed to have power transmission capacity of 8,000MW, which will serve 26 million consumers.
The two links will transmit wind and thermal power from Shanxi to Nanjing and from Jiuquan to Hunan.
Under the contract, ABB will supply HVDC converters, converter transformers and components, capacitors and filters, and high voltage circuit breakers for the two projects.
The high-voltage converters are designed to turn alternating current (AC) to direct current (DC), to enable efficient and reliable long distance transmission of electricity.
ABB Power Systems division president Claudio Facchin said: "These projects will help integrate more renewable energy and further strengthen China’s transmission grid.
"Technology and innovation are key differentiators for ABB and a major pillar of our Next Level strategy, and ABB continues to be at the forefront of HVDC and transformer technology making projects like these feasible."
ABB expects the 800 kV UHVDC links to significantly reduce transmission losses.
One of the two projects includes a 1,100km line, which will primarily transmit coal-fired power from Shanxi to Nanjing, reports Reuters.
The other project is a 2,300km ultra-high voltage transmission line which is designed to supply a mix of wind and coal power from Jiuquan to Hunan.
In the recent years, China has been focusing on strengthening capacity and improving grid efficiency by developing UHVDC links.
The transmission links are intended to enable power supply from China’s western regions to the high demand eastern regions.
Image: China has been focusing on improving grid efficiency in recent years. Photo: courtesy of a454 / FreeDigitalPhotos.net.
