A direct method considering transient voltage dip is proposed to calculate the critical clearingtime (CCT) ensuring that voltages of post fault power system are higher than limit.
The formulae for SMIS are derived and verified by case simulation, the solution of critical clearingtime (CCT) of three-phase short fault in MMS is theoretically discussed.
In addition to considering the uncertainties of load forecasting at each node, the fault occurrence location and the fault-clearingtime, the uncertainty of load model is also taken into account.