This graduation project is designed for the factory transformer substation, to certain questions in factory transformer substation design: the load computation, the analysis of three-phase short-circuits, the short-circuit current computation, the choice and verification of high and low pressure equipment, the transformer relay protection, the secondary circuit of the transformer substation and the automatic device, anti-thunder and the connection to the earth, the transformer substation overvoltage protection, the measurement, the idle work compensated and so on, All the above aspects and the structure of the power supply host wiring topology have been stated. The transformer substation with a 110kV single power source coil in it uses two 31500kVA main transformers, It adopts the shunted capacitor to carry on the high pressure centralism for compensation and sets protection for the transformer by carring on the electric current to it breaking the speed of the flow gas protection, garrisons accerding to the third kind of anti-thunder buildings,and users the strong and weak electricity union earth system to carry on the protection to the building. Based on the computation of short-circuits to the power supply system, the project has a choice design of the power cable and the electrical equioment and a preliminary design to the outdoors plane arrangement at the same time.
Key words factory supplies the power distribution, the load computation, short-circuits the computation, anti-radar and earth
