What does pumped storage mean?

Pumped storage, a kind of energy storage technology.

That is, using water as energy storage medium, the storage and management of electric energy can be realized through the mutual transformation of electric energy and potential energy. The electric energy at low power load is used to pump water to the upper reservoir, and then release water to the lower reservoir for power generation at peak power load.

It can convert surplus electric energy into high-value electric energy in the peak period of power grid when the power grid load is low. It is suitable for frequency modulation and phase modulation to stabilize the frequency and voltage of power system and improve the efficiency of thermal power plants and nuclear power plants in the system.

Related information:

Pumped storage power station pumps water to the upper reservoir by using electric energy at low power load, and then releases water to the lower reservoir for power generation at peak power consumption. Also known as pumped storage hydropower station. It can convert redundant electric energy into high-value electric energy in the peak period of the power grid when the power grid load is low, and it is also suitable for frequency modulation and phase modulation to stabilize the frequency and voltage of the power system, and it is also suitable for emergency standby, and can also improve the efficiency of thermal power plants and nuclear power plants in the system.

The construction of pumped storage power station in China started late, but the starting point is relatively high due to the late effect. The technology of several large pumped storage power stations built in recent years has reached the advanced level in the world.