Analysis and Comparison of Line Voltage Stability Indices

Voltage stability indices are one of the powerful means of power system monitoring. With the existence of several ones in literature, some of them are less accurate and insensitive to some kinds of disturbances and especially when the power system operates near to its load ability limit. In this paper, a static and dynamic analysis were conducted to assess and analyze the performances of few line Voltage Stability Indices namely Lmn index, FVSI index, NLSI index, LQP index, VSI index, VLSI index, and SFVSI index. The methodology is applied on an IEEE 14 bus test system and has made it possible to estimate the degree of, sensitivity, trust, and accuracy for each one.