The development of new-type power systems has raised an urgent demand for energy storage. As the construction of energy storage moves toward market- oriented approaches

it is of great significance to identify the role of energy storage in new-type power systems and to explore its indispensable and unique value

which also supports the development of energy storage

the construction of new-type power systems

and the realization of carbon neutrality goals. First

we revisit the research and development of energy storage in power systems

conclude its applications in generation-side

grid-side

and demand- side

and provide corresponding configuration suggestions. Then

considering the two main characteristics of new-type power systems (namely

high levels of renewables and high levels of power electronics)

we propose two corresponding overall solution approaches

i.e.

spatial-temporal flexible power balance across generation- storage-demand and active grid-strength support by energy storage

respectively

and discuss the role and value of energy storage in the two approaches. Finally

we further investigate the value of energy storage under the background of nationwide integrated power markets and propose the new concepts of system-owned energy storage and strength markets

based on which we provide suggestions on the future research of energy storage in power systems.