Abstract
The graduation project for the 2005 Zhejiang University of Science and Technology of electrical engineerings and automation (undergraduate) design, the subject of the: design is: The design of power supply system for metallurgical machinery plants. This task of the design is to reflect on the professional degree of subject knowledge,to train on the comprehensive use of subject knowledge ,to test the professional learning since a four-year learning outcomes. at the same time.
The design at first calculated through the load and supply area to determine the number, capacity and model of the main transformer, as well as determine the capacity and the model of the workshop transformer, and finally, in accordance with maximum sustained short-circuit current calculation and the calculation of the results of high-voltage circuit breakers, isolation switch, busbar, voltage transformer, current transformer for the selection, use of shunt capacitor compensation to focus on low-voltage, over-current of the transformer, the current off-speed, gas protection, lightning protection of buildings by the third type of security using strong or weak electrical grounding system of the joint protection of buildings. And draw the wiring diagram of the power supply system according to the design of wiring methods in order to complete the design of power supply system.
Keywords：design of power supply system ; transformer; circuit breaker
