Best locations of shunt SVCs for steady state voltage stability enhancement

The reactive power generations play an important role for electrical power system voltage stability margins. The Static Var Compensators (SVCs) and other reactive power resources are used for voltage stability enhancements. An electrical power system stability model with one and two SVCs is presented in this paper. The SVC state variables and firing angles are combined with the bus line voltage magnitudes and phase angles of the system in a single unknown column through the iterative solution of the Newton-Raphson method. The effects of suitable locations of SVCs on voltage stability limit are studied at different load power factors. The proposed stability model is built and tested by the IEEE-14 bus test system. The results obtained illustrate the strength of the proposed model to determine the suitable positions of SVCs.