Design of a grid-connected Photovoltaic system with grid ancillary services

Over the last decade, various reasons have determined a continuous increase of grid-connected photovoltaic systems due to need of supplying the world rise demand for electric power. This gave rise to problems concerning the stability and safety of the utility grid as well as power quality issues. It has drastically changed the way in which the grid-connected photovoltaic systems should interact with the grid. In this context the purpose of this paper it is proposed a control methodology using the active and reactive power control strategy proposed by the authors in a previous paper in order to provide ancillary services to the grid to safeguard the reliability, the stability and the power quality of the electrical system. The simulations has been carry-out using Matlab/Simulink environment, demonstrating that the proposed control methodology is able to provide grid ancillary services according to a grid interconnection standard.