Abstract
Today's Power system is more complex and consequently it would lead to less security. To meet the demand and better security levels with existing transmission lines, the Flexible AC Transmission System (FACTS) devices are one of the alternates. In this paper a Newton Raphson(NR) algorithm was developed to find out the best operating point of a Static Var Compensator(SVC) for the enhancement of system security. The proposed algorithm minimizes the security index iteratively. Security index indicates the overload level of transmission lines. The proposed algorithm is verified by IEEE 5 bus system. Line power flows and bus voltages and bus angles are obtained by the Newton Raphson algorithm and the security index is calculated for both the cases with and without SVC. The results show that the voltage profile can be enhanced and the security margin increased by applying the proposed algorithm.
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