Although renewable energy has the advantages of cleanness and non-pollution, the more the renewable energy penetrate into the power grid, the worse flexibility and stability of the grid will be. Energy storage is the key to improve the stability and utilization of renewable energy. Traditional energy storage systems, such as battery energy storage, have expensive cost and limited servicing life. As an extension of conventional energy storage, generalized energy storage can reduce the deployment and use cost and improve the economy. This paper expounds the related concepts of generalized energy storage, and sorts out the typical energy storage resources and related models in generalized energy storage, so as to further coordinate a variety of flexible resources with the uncertainty of distributed generation and load, and better apply them to power system, so as to promote the successful transformation of the power system and further reform of the future power market.

Generalized energy storage; air conditioning model; electric vehicle model; energy storage resources.