Abstract:The proposal of "dual carbon" goal has had a certain impact on the existing energy system, requiring the transformation and upgrading of the existing traditional energy system towards a clean and low-carbon direction. Energy storage is an important support for the transformation of energy system, which can further avoid the impact of intermittent energy on power grid, improve the economy and security of power system, and improve the reliability of power grid operation. Therefore, the development of energy storage is crucial. Based on the current energy development requirements and directions, the specific classifications and characteristics of energy storage are deeply discussed, the application scenarios of energy storage in the fields of power generation, transmission, distribution and consumption are analyzed, and a viable energy storage business model at the present stage and in the future is proposed, so as to promote the green, low-carbon and high-quality development of power industry and ensure the safe and stable operation of power grid under the transformation of energy system.