This project included a detailed study of the transformer station’s electrical power and the associated civil engineering design. It also included the selection and sizing of the required equipment, the preparation of the technical file submitted for approval to STEG, and final validation. Following this approval, all the work was carried out, covering both civil engineering and electrical installations. This project resulted in the installation of a transformer station that complies with standards, is secure and efficient, guaranteeing a reliable and sustainable power supply.