Modeling active distribution grids in power systems voltage stability studies

Details

Supervisors

De Jaeger, Emmanuel

Faculty

Ecole polytechnique de Louvain

Degree label

Master [120] : ingénieur civil électricien, à finalité spécialisée

Abstract

The stability of a system is the capacity of the grid to maintain acceptable operating levels when it has been submitted to perturbations. When performing stability studies for the electrical network in computer tools, the loads are normally considered as static loads. This is useful for power flows studies, cable sizing (ampacity analysis), voltage regulation (voltage drop), power system expansion planning, among others. The proposal for this work consists of the modelling of the loads for power system dynamics studies. There are already several load models that tend to resemble the behavior of the electrical loads under real conditions. Part of this work is to raise awareness of the importance of using a more adequate model when performing stability studies. It should also be noted that the composition of electrical loads has changed significantly over the last 20 years. This means that there are new components involved, among them a lot of power electronics is associated, especially with the rapid growth of electric vehicle chargers and also the large number of distributed generation (residential solar panels) and these have a special impact on the system stability results. And to be more precise according to the scope of this work, they have a significant impact on voltage stability.