Pumped hydropower storage national energy administration

What is pumped storage hydropower?

Pumped storage hydropower (PSH) is the most dominant form of energy storage on the electric grid today. It plays an important role in integrating more renewable resources onto the grid. PSH can be characterized as open-loop or closed-loop, with open-loop PSH having an ongoing hydrologic connection to a natural body of water.

What is pumped storage hydropower (PSH)?

Among the various technologies available, pumped storage hydropower (PSH) stands out as a cornerstone solution, ensuring grid stability and sustainability. This report explores the substantial benefits, challenges, and strategic pathways for advancing PSH in North America, emphasizing its vital role in a renewable energy future.

Why is China building pumped-storage hydropower facilities?

China is building pumped-storage hydropower facilities to increase the flexibility of the power grid and accommodate growing wind and solar power. As of May 2023, China had 50 gigawatts (GW) of operational pumped-storage capacity, 30% of global capacity and more than any other country.

When was pumped storage hydropower first used in the US?

PSH was first used in the United States in 1930. The first known use cases of PSH were found in Italy and Switzerland in the 1890s, and PSH acts similarly to a giant battery, because it can store power and then release it when needed.

Is hydropower a tapped resource?

Hydropower was America’s first renewable power source. It is often mistakenly considered a tapped resource, but according to the U.S. Department of Energy’s 2016 Hydropower Vision report, hydropower’s capacity can sustainably add 50 new gigawatts by 2050 — 36 GW of which is pumped storage.

How big is China's pumped-storage capacity?

China’s pumped-storage capacity is set to increase even more, with 89 GW of capacity currently under construction. Developers are seeking governmental approvals, land rights, or financing for an additional 276 GW of pumped-storage projects, according to the data from Global Energy Monitor. Pumped storage is a type of energy storage.