Abstract
Graduation project is a syntheses handle to the knowledge that we have learned. It can strengthen the comprehension to the basic knowledge and it is a favorable foundation to the work.. The primary distribution system of the substation refer versus user running part. The external power supply part is called main connection. The inter power supply part ,which supply for the work of transformer substation and for the workers’ life is called substation supply connection.This design follows the design principles of electric part of the substation strictly. Through the medium of designing and reckoning the electric main connection, designing and counting house supply, counting short-circuit current, selecting and verifying electrical equipment as well as designing switching arrangement, it have accomplished the design of the primary distribution system of the (110KV)substation that have been given.
Because of restrict of some conditions, in this dissertation, only the primary distribution system of the substation is designed, and the secondary distribution system, this paper have omited to do it, I looking forward to doing further study in the future.
Keywords:power supply,main connection,designation,choose and checkout