Studies of Voltage Stability Based on SVC Control

A fast method for determining the static voltage stability of modern power systems with static var compensator (SVC) is proposed in this paper. Static var compensator is an important component of flexible AC transmission system, which provides an effective approach to enhance voltage stability and to increase the power transfer capability. This paper discusses the effect of SVC controller on voltage stability Based on Generalized Tellegen´s Theorem. Meanwhile a practical criterion for static voltage stability is presented, The method determines the maximum power transfer limit by finding the critical value of equivalent impedance model by the reactive compensation. The application on an IEEE 30 bus system shows that the proposed method is a feasible and effective way to improve voltage stability, it can provide useful information for the operators to analyze and control voltage stability on line.