Abstract: Due to the increasing demand for electricity in the substation area, the integration of new energy sources such as wind and photovoltaic power, and the development of diversified energy application models in the substation area, energy storage systems have become an indispensable key link for power regulation. Currently, electrochemical energy storage solutions mainly focus on lithium-ion battery energy storage, but lithium-ion batteries have disadvantages such as high cost, low safety, and poor low-temperature performance. The paper proposes a sodium-lithium ion combined energy storage system scheme that is compatible with the high energy density of lithium-ion batteries and the high safety and good low-temperature performance advantages of sodium-ion batteries, as well as an architecture design of the intelligent remote control platform. Three operation modes are set up to adapt to the substation area, meeting the operational requirements of modern smart distribution network. The system effectively enhances power supply reliability, supports diversified interaction capabilities, and improves power quality within the substation area. At the same time, its replicability and easy promotion provide typical construction experience for other substation areas with demand for source-grid-load-storage interaction.