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Abstract
The main assignment of the design is the initial plan of electric with regard to regional fossill¡ªfule plant (2*100MW+4*300MW). To begin with ,we must ensure the project of electric main line .What more ,we select the capacity of generator ,we select generator¡¢transformer¡¢liasion transformer¡¢transformer which used in the factory and enlighten spare
transformer. We can carry out the short circuit calculation .The diagram of equivalent can be make out at the basic of transformer and generator data respectively. At last, we calculate the reactance which the point of short circuit to every power system and lay out the table of short circuit. Interrupter, disconnect switch, busbar, lighting arresters can be selected by way of the calculation. We can check the install we choose via the result of short circuit. Find out the protection principle of 600MW generator and transformer, know the movement situation of the protection.
Keywords: electric main line; short-circuit calculation;
equipment choice;
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