Control-strategy design for frequency control in autonomous smart microgrids

Synchronous Machines of large power plants are responsible for setting the system frequency. This frequency allows the coordination and operation of the various Power Systems' (PS) elements. However, due to the expected development of Distributed Generation a Microgrid (MG) may lack Synchronous Generation losing the capability of isolated operation. This paper proposes a control strategy for Converter-Coupled Distributed Generation to ensure stable operation of isolated MG even in the absence of Synchronous Generation.