This study focuses in the primary frequency control of a generic microgrid. This microgrid consists of a Photovoltaic (PV), an Energy Storage System (ESS), a battery and a Diesel Generator (DG) which account for the majority of systems installed today, specially in remote areas, such as islands.This thesis addresses the development of the primary frequency control of the microgrid. The battery’s convertor is operated as a grid forming and it’s connected in parallel with the diesel generator. The PV’s converter is operated as a grid feeding. The control is handed as a distributed approach between the different elements of the system. Through this work, this control is analysed, through a simulation model implemented in PLECS® which is a Matlab blockset. The simulation model developed shows the operation of the control droop in different operating conditions, such as load and generation changes.