Review of methodologies for the analysis of voltage stability in power systems

Voltage stability is a very important subject in power system operation. In the literature there is a number of works proposing a variety of methods and techniques for the analysis of voltage stability problem. Into these ones, there is a family of methods based on load flow formulations, which aim to be consistent in predicting if voltage is stable or unstable. In this paper, three load flow-based methodologies are applied to a very simple power system- and concluding remarks are made by comparing their results.