Analysis Method for the Substitution Effect of the Alternative Energy Storage of Power Grid Functions Based on the Annual Cost Method

Abstract New energy storage is an important technology and fundamental equipment for building a new electric power system, an important support for achieving the goals of carbon peaking and carbon neutrality, and also a development focus for emerging strategic industries. In light of typical situations, such as a lack of station site resources and large-scale access to distributed new energy for power supply on a sea island, new energy storage is proposed to solve power supply capacity or quality problems in local areas and to replace or postpone power transmission and distribution investment. Considering the different life cycles of energy storage and power grid facility projects, we proposed an assessment method for the substitution effect of alternative energy storage on power grid functions based on the annual cost method and measured its cost-effectiveness under typical application scenarios.