Nueva propuesta de un índice para la evaluación de la estabilidad de voltaje a corto plazo en sistemas de potencia considerando cargas dinámicas no lineales

Abstract

The relevance of electric power systems (EPS) has been growing worldwide due to the increasing availability of energy sources. Research has focused on monitoring dynamic loads and their impact on short-term stability, considering factors such as planning, expansion, and management, as well as system capacity through VQ sensitivity analysis where it determines the most sensitive bus to reactive power variation. The determination of short-term stability helps operators to take predictive actions in case of changes in the system such as the entrance of IMs. For this study, a new index is proposed for the evaluation of the short-term voltage stability in power systems before the incorporation of nonlinear dynamic loads such as the case of MI. The behavior of the NISV index has been evaluated in several scenarios taking a punctual case, performing it on the IEEE 14-bar model, where the performance of the index is verified and how to vary over time presents unstable conditions to changes in the load.