A Survey on Reactive Power Optimization and Voltage Stability in Power Systems

Reactive power plays an important role in supporting the real power transfers by maintaining voltage stability and system reliability. It is a critical element for a transmission operator to ensure the reliability of an electric system while minimizing the cost associated with it. The traditional objectives of reactive power dispatch are focused on the technical side of reactive support such as minimization of transmission losses. Reactive power cost compensation to a generator is based on the incurred cost of its reactive power contribution less the cost of its obligation to support the active power delivery. In this paper, we tried to introduce reactive power optimization problem, miscellaneous objectives, voltage stability indices types and formulating of them, reviewing recent studies in this filed and comparison between them for checking performance of them. This paper also introduces complete references in this case with a short noting to them in text body. This paper will good reference for who they want begin to study in this field due to this paper supports all issues in reactive power optimization field.