China set for 40 GW of pumped hydro storage next year

The showpiece 3.6 GW Fengning county project which will offer grid services and back-up power at the 2022 Winter Olympics is part of a 31.15 GW construction pipeline of projects, many of which are set to come into service next year.

The 3.6 GW energy storage project being built by China in Fengning county will help the nation to 40 GW of pumped hydro capacity next year, as stipulated in the government’s 13th five-year plan.

The National Energy Administration says there is already 19.23 GW of pumped hydro storage capacity in China with a further 31.15 GW under construction, including the $2.78 billion Fengning project in Hebei province which is set to be the world’s largest.

Chinese state media sources including the Xinhua News agency, state broadcaster CCTV and newspaper The People’s Daily have reported Fengning will take just five minutes to switch from full pumping operation – where excess renewable energy present in the grid is used to drive water uphill between two large reservoirs – to full energy generation as the water rushes back downhill, thus acting as a huge battery for an eventual 3.6 GW of solar-and-wind-to-hydro power.

Winter Olympics

The project is not expected to be fully operational until 2023 but a $1.54 billion, 1.8 GW first stage will enable it to provide peak shaving services to the grid and emergency back-up power during the Winter Olympics to be staged in Beijing and Zhangjiakou in 2022. The second stage of the project will add the remaining 1.8 GW of storage capacity at an estimated $1.24 billion cost.

China’s National Development and Reform Commission approved the start of works in 2013 with the project featuring 12 reversible hydroelectric power generators.

The project is being developed by the State Grid Corporation of China with fellow state-owned entity China Gezhouba Group Corp providing engineering, procurement and construction services.

With a huge volume of solar and wind projects having been developed in the north of China, the state is investing heavily in pumped storage as well as in ultra-high-voltage transmission lines to transmit power to the eastern coastal cities.

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