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.

Automated summary

This study proposes a decentralized second frequency control method for cascaded-type microgrids, which achieves frequency restoration and average power sharing using only local information and is suitable for loads with different characteristics. The control algorithm convergence analysis and control coefficient selection are provided based on the singularity theory. Real-time simulation results verify the feasibility of the proposed method.