Coordinated voltage control in distribution networks using distributed generation

Large scale integration of distributed generation in distribution networks causes voltage quality problems, but also may be able to provide means to solve theses problems if correctly controlled. A possible way to take advantage of distributed generation is to use it to perform a coordinated voltage control that would maintain voltage to its set-point value at the substation and some other specific nodes called pilot buses. The aim of this paper is to compare classic secondary voltage control and coordinated voltage control applied to distribution network, in order to show the ability of coordinated voltage control to provide voltage ancillary services and efficient reactive energy reserve management.