Venkateswara and Kumar Firefly Algorithm based Optimal Power Flow with Static VAR Compensator for Improvement of Power System Security under Network Contingency

1639 Venkateswara and Kumar Firefly Algorithm based Optimal Power Flow with Static VAR Compensator for Improvement of Power System Security under Network Contingency  Abstract— At present owing to the increase in power demand power system have become more complex and heavily loaded, and are subjected to unstable or insecure operations. In order to provide a secure operation of the power system, it is needed to enhance the level of a security margin to the power system. In this paper Firefly algorithm based Optimal Power Flow used to select the optimal sizing of SVC which minimizes the total real power generation cost is proposed. New indices like Line security index and voltage security index are defined for measuring Power system security. This paper was also deals with the impact of SVC under network contingency with Firefly Algorithm based Optimal Power Flow. The results were presented for 5 bus system and modified IEEE 30 bus system without and with SVC in normal operating condition as well as network contingency by using Firefly Algorithm based Optimal Power Flow. The results obtained with Firefly optimization technique was compared with Genetic Algorithm (GA).