In the power system network, the constant increase in demand for active and reactive power has restricted the possibility for network expansion which many times cause serious problems. The power system must be capable to keep acceptable voltage at all nodes in the network in a normal operating situation and during times of disturbance. Voltage instability is a severe concern in the system due to an increasing and unpredictable voltage drop. The research provided in this paper deals with many facts about the issue of voltage stability.
The major emphasis of this paper is to connect the FACTS device (Static VAR Compensator) at the system’s sensitive location to rectify the voltage instability issue. The SVC enables the transmission lines to be loaded near to their thermal limits, pushing the power to travel through the optimal paths. The SVSI is used to identify the optimal location of SVC. IEEE 14 bus system is used as test system to check the efficacy of proposed technique, Different cases (like base, 5% increment in load, 5% decrement in load) are considered here also. In each case voltage deviation (VD) is calculated and found superior as compared to other techniques. It has been observed that SVSI give better location of SVC rather than other indexes.