Voltage and Reactive Power Control in Microgrid Based on Self-triggered Consistency Under DoS Attack
摘要
To address the problem of voltage deviation and uneven distribution of reactive power in island microgrid caused by traditional droop control and line impedance mismatch,this paper proposes a distributed layered control strategy based on self-triggered consistency algorithm.In the secondary control layer of microgrid,the global average estimator of voltage and reactive power is constructed by using the consistency algorithm,and the deviation of voltage and reactive power in the primary control layer are adjusted based on the quantity of compensation.Considering that network intruders perform Denial of Service(DoS) attacks on communication network at the secondary control layer under Cyber-Physical Systems(CPS) environments and block the information exchanges between agents,which leads to deterioration in the performance of the consistency algorithm,this paper gives a consistency algorithm based on ternary control with self-triggered communication strategy.By introducing an attack detection function to overcome the constraints on the frequency of DoS attacks,the strategy achieves on-demand communication while enhancing the robustness against DoS attacks.Simulation results show that the proposed control strategy can recover the voltage deviation and guarantee the even distribution of reactive power in microgrid,and ensure the convergence performance of the consistency algorithm under DoS attacks.