Voltage control in distribution networks using smart control devices of the Distributed Generators

Abstract

Several factors lead to the increase of Distributed Generation (DG), including the ongoing penetration of electric power plants from renewable sources. However, most of present distribution networks have been designed as passive networks and present some relevant problems that prevent a strong penetration of DG. One of the major problems is the voltage rise due to active power injections made by distributed generators. This paper reviews control strategies that have been recently proposed to control the voltage profile of distribution networks and to mitigate voltage rise. A voltage rise mitigation strategy is then presented along with a mathematical formulation that encompasses both coordinated and local reactive power generation controls. A proposal for an implementation using smart control devices of the distributed generators is finally presented.