Advanced technique for optimal allocation of static var compensators in large-scale interconnected networks

Flexible AC Transmission Systems (FACTS) are recently employed to overcome the power system stability challenges. Optimal number, device location, and setting parameters of FACTS devices in large-Scale Interconnected Networks (LSIN) are considered a complex multi-objective requirement. In this paper, an advanced technique for optimal numbering, location, and sizing of Static-VAR Compensator (SVC) in LSIN is developed. The technique utilizes a line stability index for optimal numbering and location of the SVC. The optimal sizing is achieved via Cuckoo Search (CS) heuristic optimization technique. The proposed technique is applied to an IEEE-57 bus system in case of outage of line 50 and IEEE-39 bus system with penetration of wind energy generation. The simulation work, of the proposed technique applied to the two different networks, is implemented within Matlab™ program. The proposed technique enhances the voltage profile, system stability and reduces the overall power losses as per the study cases. The results obtained show the effectiveness of the proposed technique to be utilized for LSIN.