Abstract:

To make up for the shortage of the power system security analysis, the power system’s probabilistic safety analysis was studied. An indicator model was introduced which showed the probability of the power system security in the complex power injection space. The impact of the reactive power injection and the proportion of induction motor load in uncertainty were considered at the base of existing research results. And according to the migration characteristics of the complex power dynamic security region into the space of hyperplane, the calculation method to simplify indicators was deduced. Simulation shows that the indicator isable to fully reflect the security situation of the power system, and it shows rationality.

Key words: complex power injection space; dynamic security region; probability security; uncertainty of the proportion of induction-motor