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This paper mainly studies the calculation of short-circuit current in the electrical design of a domestic electrified railway traction substation power supply system. The choice of short-circuit point depends on the main transformer capacity that determined according to the traction substation main connection mode and load calculation results, calculation of short-circuit current, Completed the main electrical equipment and selection of busbar according to the results of the short circuit calculation.

The calculation of short-circuit current in the electrical design of traction substation