Simulation of power direction based on the short-circuit protection

The present invention discloses a method of simulation based on the short-circuit protection of the power direction, comprising the steps of: short-circuit fault is calculated according to information obtained direction of the short-circuit power lines; hierarchical topology analysis in the direction of power, power flow and short circuit protection is obtained the range of values; the flow of short-circuit power and scope value is compared with a preset value, determines whether to activate the protection; protected if the protection is not reset to start, if the protective boot start protection information is given, adding activation protection queue; protective boot execution queue meeting the protection operating conditions; short-circuit flow distributed computing and calculating, determining whether the fault isolation; isolation of the protection if the fault has reset; if the fault is not isolated, re-fault calculation is returned. The present invention combines the advantages of both logic determination Comparison with setting method.