A Grid Substation (GSS) is a key part of the electrical power network that connects power generation plants to the transmission and distribution systems. Its primary function is to step down high-voltage electricity from transmission lines to lower voltages suitable for local distribution. GSS facilities include transformers, circuit breakers, switchgear, and control equipment to ensure smooth operation, safety, and protection against faults. They also manage load distribution and enable grid stability by adjusting voltage levels as needed.