Review on Volt/VAr Optimization and Control in Electric Distribution System

In smart grid environment, Volt/VAr Optimization (VVO) is receiving great attention among other energy efficient techniques. The main concept of VVO is to utilize various Volt/VAr Control (VVC) and supporting devices in an optimal way for the purpose of minimal losses and maximum energy savings. However the care has been taken so that power quality of end-use customer will not be affected while satisfying various system and operational constraints. Several techniques have been suggested for the solution of VVO problem. VVO/VVC methods are classified as analytical methods, numerical methods, heuristic approaches, and intelligent methods. Some practical VVO experiences are also reviewed. This paper presents an overview of various solution methods applied in VVO problem and future research trends in this area.