Rapid probabilistic load flow calculation method considering static power frequency characteristics of electric power system

The present invention discloses a fast method of computing the probability flow power frequency power system considering static characteristics, the method comprising: calculating a power system parameters required for a conventional flow extracted from the power system and initializes; increased flow calculation model of a conventional frequency requirements to be variables, the improved fast decoupled load flow model to calculate the state variables to be seeking a reference voltage node, and the branch power system frequency; each order half invariant computing node voltage, the power system frequency and the branch; stage by the Gram-Charlier number expand, seeking to be determined variable node voltage, system frequency and a cumulative probability distribution function and the branch power probability density function. In the analysis of distribution of the present invention will affect the system frequency and system frequency of the power system uncertainties include the probability of the trend, the calculation speed, can provide a more complete analysis system for the safe and economic operation of a comprehensive analysis and stable electricity evaluation.