Distributed Finite-Time Secondary Frequency Control of an Islanded Microgrid with Renewable Energy Sources

This paper investigates a distributed control scheme for the coordination of an islanded microgrid considering renewable energy sources (RES). A distributed finite-time secondary frequency controller is designed to compensate the frequency deviation in a finite-time manner. The model of an islanded microgrid considering RES is presented with the connection of graph theory. Comparing with the traditional dynamic model, this paper gives a specific model of dc power source considering RES. Further, the design process of the distributed secondary frequency controller is described in detail, including the upper bounds of the convergence time. Finally, a simulation is provided to verify the effectiveness of our proposed method.