The growing integration of renewable energy sources (RES) is consistently reshaping the power generation mix, while the shift of electricity end-users from customers to prosumers is altering the load patterns. Additionally, as future power grids are expected to include DC resources and DC networks, conventional substations, which are primarily designed for AC networks, may be impacted. This paper proposes a solid-state substation (SSS) as a promising candidate for future power substations in future power grids. With the ability to include DC buses alongside AC buses, the proposed solid-state substation can provide additional functionalities, such as serving DC loads, facilitating RES integration, and delivering system-level advantages. This paper also presents the key fundamental differences in terms of layout and operation between conventional power substations and solid-state substations, while emphasizing the basic control architecture of solid-state substations. To validate the ben