Distributed Resilient Secondary Control Strategy Considering Economic Dispatch for DC Microgrids: A Dynamic Event-Triggered Mechanism

With the aim to solve the secondary control problems for DC microgrids with cyber-attacks and limited bandwidth in the communication network, this article proposed a unified distributed resilient control strategy to achieve simultaneously appropriate voltage restoration and optimal power allocation (economic dispatch) by integrating dynamic event-triggered mechanism (DETM). First, based on dynamic average consensus protocol (DACP) and taking the DETM into consideration, the voltage regulator with distributed average voltage estimator and the PI controller is designed. Meanwhile, in order to maintain the economic operation of the microgrids under cyber-attacks, the power regulator with distributed optimal power controller and the PI controller is designed. Then, the sufficient conditions of convergence and optimality for the proposed distributed resilient average voltage estimator and optimal power controller are demonstrated by using the Lyapunov stability principle and convex optimization analysis, respectively. To this end, several case studies are conducted to validate the effectiveness of the proposed control strategy for enhancing the security, robustness, adaptability and economy of DC microgrids.