Upgraded coordinated voltage control for distribution systems

It is common knowledge that large scale integration of Dispersed Generation (DG) in distribution networks may cause voltage quality problems. But, on the other hand, if correctly controlled it may be able to provide a means of solving these problems. In order to enhance the use of DG, it can be used to perform a coordinated voltage control that would maintain voltage at its set-point value at the substation and some other specific nodes called pilot buses. This function is known as VVC (Voltage Var Control) and is an Advanced Distribution Automation function (ADA) developed for smart grids. The aim of this paper is to propose a new Coordinated Voltage Control for Distribution systems (D-CVC) which uses DCs and Under Load Tap Changer (ULTC). This upgraded D-CVC will be compare with a simpler D-CVC designed in previous works and with the voltage control with only ULTC, which is the current mean of voltage control in most distribution networks.