Angular and Voltage Power System Stability Analysis Considering the Uncertainty of Load Magnitude

This paper presents a new approach for the analysis of angular and voltage stability of power systems, considering the uncertainty of the load magnitude, which is represented by the Ornstein-Uhlenbeck stochastic process. The uncertainty is considered in both, the initial stages of operation (power flow) and at each integration step of the time-domain simulation. The proposed approach performs the stability assessment of the N-1 contingencies of the IEEE 9-bus 3-machine test power system, and shows that considering the uncertainty of the load in the stability assessment, could change its results. It additionally allowed an initial test of the robustness of the ANFIS automatic voltage regulator.