Abstract: The DC substation voltage loss compensation method directly constructs the battery capacity configuration model without extracting the characterization information of the DC substation voltage loss mechanism, resulting in poor voltage loss compensation effect of the method. Therefore, this article proposes a DC substation voltage loss compensation method that considers battery capacity configuration. Extract characterization information on the mechanism of voltage loss in DC substations to provide a basis for model construction. A battery capacity configuration model was constructed considering battery capacity configuration, and a DC substation voltage loss compensation process was designed to achieve voltage loss compensation. The experimental results show that this research method has higher battery utilization efficiency and better compensation effect for DC substation voltage loss, which is worth promoting.