A Decentralized Secondary Frequency Restoration Control With Local Current for Island Cascaded-Type Microgrids

Frequency regulation is important for obtaining higher power supply quality. To our best knowledge, there is no decentralized frequency restoration method for cascaded-type microgrid. This paper proposes a decentralized second frequency control for the cascaded-type microgrid. It only relies on local information to achieve frequency restoration and average power sharing. In addition, the proposed control is suitable for loads with different characteristics. Based on the singularity theory, we provide the control algorithm convergence analysis and control coefficient selection. Finally, the real-time simulation results conducted by RTLAB verify the feasibility of the proposed method.