China is developing the world’s most ambitious network to transport its clean energy

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The Ningxia-Hunan UHV line is one of the most ambitious power grids rolled out by the Asian giant. Designed to transmit direct current at ±800 kilovolts, it has a capacity of 8,000 megawatts and can deliver more than 36,000 gigawatt-hours (GWh) of electricity per year, enough to supply some 10 million homes, according to data from State Grid (the state operator responsible for the national power grid) cited by the Xinhua news agency.

The electricity travels through five regions (Ningxia, Gansu, Shaanxi, Chongqing and Hubei) before reaching its destination with a loss of less than 3% per 621 miles, compared to the 6% or 7% that would be lost in a conventional grid. Inaugurated this year and fully operational since August, it is also the first line of its kind designed to primarily transport green energy. It is powered by plants with a total capacity of 17.6 GW, of which 9 GW come from solar photovoltaics and 4 GW from wind power.

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