Multi-link power system time delay characteristic analysis method and system

The invention relates to a multi-link power system time delay characteristic analysis method and system, and the method comprises the steps: determining a plurality of links which generate time delay in the information transmission process of a multi-link power system, determining a probability distribution function which describes the time delay characteristic of each link based on an M/M/1 queuing theory, and based on a Frank Copula function, determining a Copula function model describing a mutual relation among time delays of a plurality of links; finally obtaining a joint distribution function of the total time delay of the multi-link power system by utilizing a multivariate Sklar theorem according to the Copula function model and a probability distribution function of time delay characteristics of each link, and by utilizing the joint distribution function, obtaining the probability density of the total time delay of the multi-link power system. According to the method, the problem that multi-link time d