Energy storage is an effective approach to achieve the absorption of renewable energy and ensure the safe and stable operation of the power grid. In 2019

the cumulative installed capacity of power storage projects(including physical energy storage

electrochemical energy storage

and molten salt heat storage) that have been put into operation worldwide reached 183.1 GW

a year-on-year increase of 1.2%. According to the energy conversion mechanism

energy storage technology can be divided into physical energy storage

chemical energy storage and other energy storage. Different energy storage technologies are applied in different fields. With the development of new energy technology

the energy storage market will usher in rapid growth. This article mainly introduces the current development of energy storage technology and its application in the four aspects of power system generation

distribution

transmission and use. Moreover

it prospects the development trend of energy storage technology in the future

which can provide a certain reference for technical research and engineering practice of energy storage.