The transformer substation is in the electrical power system transforms the voltage,accepts with the assignment electrical energy,control electric power flow direction with the regulation voltage electric power facility,it relates through its transformer all levels of voltage electrical network,is an electrical power system part.The transformer substation is composed by a series of equipment,the electrical energy transforms,the contact,the live pressure,the assignment in among.Transformer substation including each kind of equipment:Transformer,circuit breaker,load switch,generatrix,current transformer,voltage transformer and so on.This article is to a 35 kilovolt transformer substation electrical part design.This design take the actual load as the basis,take the transformer substation best movement as the foundation,according to the related stipulation and the standard,completed has satisfied this area power supply request the 35kV transformer substation preliminary design.This article altogether divides into eight parts,in which mainly includes the host wiring the design,the load computation,the transformer choice,the high-pressured electric appliance choice,the transformer substation illumination anti-radar and the transformer substation arrangement and so on.This transformer substation is equipped with 2 main transformers,two group power source coils in,35 kilovolts high-tension sides and 10 kilovolts high-tension sides use the single generatrix sectional type structure.This design has carried on the proof to the electrical host wiring diagram pattern,and has carried on the short-circuit current computation.Simultaneously to the main electrical equipment (including circuit breaker,load switch,isolator,current transformer,voltage transformer) has also carried on the choice and the verification.Also has carried on the design and the computation to the illumination and the anti-radar earth protection disposition.And attaches the transformer substation floor-plan,the high and low pressure disposition chart,the transformer substation illumination horizontal plan and the transformer substation anti-radar earth chart.