Voltage stability indices sensitivity evaluation under load variation in electrical power system

Monitoring the power system stability is one of the major challenges facing operators today. The use of the best indices is essential as a mean of decision-making; this choice can be achieved through very specific criteria such as the sensitivity. The purpose of this paper is to discuss and evaluate some voltage stability indices sensitivity. This approach permits an accurate decision-making and a reference usage depending on the point of operation and the nature of disturbance that occurs in the electrical network. The study is applied for IEEE 14-bus and the methodology has proven its effectiveness under different scenarios of contingencies.