Droop-free distributed control with event-triggered communication in DC micro-grid

Abstract

A novel nonlinear droop-free distributed controller is proposed to achieve accurate current sharing and eliminate voltage drops in dc Micro-Grid (MG). Then by introducing the sample and holding scheme, the proposed controller is extended to the event-triggered-based controller which is designed based on the Lyapunov approach to guarantee the global stability and convergence instead of localized stability. Meanwhile, the event-triggered-based controller can considerably reduce the communication traffic and significantly relax the requirement for precise real-time information transmission without sacrificing system performance. An experimental setup is built to validate the effectiveness of the proposed controller by comparing with different controllers and communication strategies.