Optimal location of SVC for voltage security enhancement using MOPSO

Location of the static VAR compensator (SVC) and other types of Flexible AC Transmission Systems (FACTS) devices is important for the enhancement of practical power systems voltage stability. In this paper, a Multi-Objective Particle Swarm Optimization (MOPSO) is used to solve a mixed continuous-discrete multi-objective optimization problem in order to find optimal location of SVC. Simulations are performed on IEEE 14 test system for optimal location and size of SVC device. A contingency analysis to determine the critical outages with respect to voltage security is also examined in order to evaluate their effect on the location analysis. The obtained results show that with the allocation of SVC device with the proposed method, the voltage stability is considerably enhanced in both normal state and critical contingencies. The calculation of the load margin demonstrates the effectiveness of the proposed method.