Optimal Location and Size of SVC and TCSC for Multi-objective Static Voltage Stability Enhancement

Abstract

A Non-dominated Sorting Particle Swarm Optimization (NSPSO) is used to solve a mixed continuousdiscreet Multi-objective optimization problem witch consist of optimal location and size of Static Var Compensators (SVC) and Thyristor Controlled Series Capacitors (TCSC) in order to maximize Static Voltage Stability Margin (SVSM), reduce power losses (PL) and minimize load Voltage Deviations (VD). While finding the optimal location, thermal limits for the lines and voltage limits for the buses are taken as security constraints. The optimization is performed considering two and three objectives for various combinations of FACTS. Simulations are performed on IEEE 14 test system for optimal location and size of FACTS devices. The obtained results are very encouraging and reveal the capability of the method to generate well-distributed non-dominated Pareto front.