Optimal Placement and Sizing of SVC in Power System for Voltage Stability Improvement using Harmony Search Algorithm

Voltage Instability is one of the major phenomena which has resulted a major obstruct to power system network. Use FACTS controllers possible that voltage stability status in a stressed power system could be improved with effective reactive power compensation. This paper proposes at multi-objective optimization problem such as minimization of real power loss, L-index and load voltage deviation. To find the critical buses in the system for optimal location of shunt connected FACTS controller known as Static Var Compensator (SVC) here used L-index. To find the optimal sizes of SVC for solving Multi-objective optimization problem a Meta-Heuristic Algorithm Known as Harmony Search Algorithm (HAS) will be applied. The Simulation works are performed on IEEE-14 bus test system. The results are shown that optimal location and sizing of SVC minimizes real power losses, load voltage deviation, L-index and also Voltage profiles are improved at different loading conditions. In this present paper work 125%, 150%, 175%, 200% overloading cases are considered.