Cluster-based fault critical clearing time parallel computing method

A cluster-based fault critical clearing time parallel computing method distributes computing cores according to search interval lengths of faults and ensures the faults with great search intervals to receive more cores. If the tap position split step size of the fault is less than the computing accuracy, the number of cores required by the fault is determined according to the computing accuracy demand. When the absolute accuracy is adopted, if the tap position split step size meets the convergence accuracy, longer observation time is adopted to directly obtain the transient state security CCT and dynamic security CCT through once iteration; else, shorter observation time is adopted to obtain transient security CCT and set the transient security CCT as the upper limit, and then the longer observation time is utilized to obtain the dynamic security CCT. When the relative accuracy is adopted, the transient security CCT is firstly obtained and the dynamic security CCT is subsequently obtained. When the security stability indexes of various power systems are taken into consideration, the minimum one of the angle stability CCT, the voltage security CCT, frequency security CCT and dynamic security CCT is obtained.