Evaluation of Simulations for Short Term Voltage S

In order to evaluate the short-term voltage stability of an electrical power grid, it is necessary to employ not only systematic and well-targeted fault simulations, but also an evaluation method that assesses the criticality of the individual scenarios. A binary decision between stable or unstable, or whether a threshold value is exceeded or not, is inadequate, particularly in instances where the modeling of the system is subject to a certain degree of uncertainty. Since systematic deviations are subject to natural principles and an intervention limit can thus be determined deterministically, an evaluation method is therefore required that allows a statement to be made about the proximity to instability or to a threshold value. This paper presents and discusses a new index developed for the problem of model uncertainties, outlines derived requirements, and compares it with existing indices from the literature. The benefits of this novel index compared with established ones were visualized through indicative simulations. Additionally, the uncertainties inherent in load parameterization and their implications on voltage recovery were analyzed using Monte Carlo simulations within the framework of the IEEE 39 bus New England system.