Fady Shehata Nassry

High Voltage Substation Design (Graduation Project) Graduation Project is Design 220/66/22 KV GIS Substation: GIS Substation in Egypt consists of 4 three winding transformers rated 75/75/25 MVA completed with all associated switchgear and 2 auxiliary transformers 11/0.4KV. The scope of project is the complete design for the primary and secondary of the substation in addition to the solar system supplying power to the administration building and street lighting. The preliminary data: 1) Complete layout of the project 2)transformer parameters. 3) Distribution network SLD. 4) The cables specifications. 5) the suggested relays manufacture. The Tasks: 1) Calculate Voltage drop and short circuit for each feeder (with accepted limits). 2) the specifications of suggested circuit interruption. 3) CT & VT Sizing 4) cables & TL sizing. 5) CB & Disconnectors sizing. 6) Busbar Design. 7) Grounding system design.