摘要： 针对传统下垂控制及线路阻抗不匹配等因素引起的孤岛微电网电压偏差及无功功率难以均分的问题，提出基于自触发一致性算法的分布式分层控制策略。在微电网二次控制层采用一致性算法构造电压、无功功率全局平均值估计器，基于补偿量实现对一次控制层电压、无功功率偏差的调节。考虑信息物理系统环境下网络入侵者对二次控制层通信网络实施的拒绝服务（DoS）攻击，阻断各智能体间的信息传递致使一致性算法性能劣化，给出基于三元组自触发通信的一致性算法，通过引入攻击检测函数克服对DoS攻击频率的约束，在实现按需通信的同时增强对DoS攻击的鲁棒性。仿真结果表明，该控制策略可实现微电网电压的恢复及无功功率的平均分配，并确保一致性算法在DoS攻击下的收敛性能。

关键词: 微电网, 一致性算法, 二次控制, 自触发通信, 拒绝服务攻击

Abstract: 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.

Key words: microgrid, consistency algorithm, secondary control, self-triggered communication, Denial of Service(DoS) attack

中图分类号: 

• TP391