【摘要】 随着微电网信息化和智能化水平提升，恶意信息攻击对微电网安全稳定运行的威胁也更加严重。相比于配电网，微电网系统规模小，可再生能源渗透率高、调节能力弱，故面对信息攻击时也更加脆弱。为针对信息攻击分析微电网信息物理系统的脆弱性，首先，建立了考虑控制策略与可再生能源出力不确定性的微电网物理侧模型和基于数据流的考虑信息攻击的信息侧模型。其次，为分析信息攻击，建立了攻击方法-攻击对象关联矩阵和考虑攻击者和调度中心行为的双层规划模型。然后，基于负荷重分配特性和Shapley值法，提出了基于攻击后果的脆弱性指标计算方法和脆弱性评估流程。最后，对38节点算例进行仿真，针对信息攻击评估了微电网信息物理系统的脆弱性情况，并分析验证了所提方法的有效性以及对制定防御策略的指导意义。更多还原

【Abstract】 With the evolution of the informatization and intelligence level of microgrids, malicious cyber attacks are becoming more serious threats to the safe and stable operation of microgrids. Compared with the distribution network, the microgrid has smaller scale, higher renewable energy penetration, and weaker adjustment capacity, and is more vulnerable to cyber attacks. In order to analyze the vulnerability of microgrid cyber physical system against cyber attacks, first, a physical-side model of microgrid considering control strategy and renewable energy output uncertainty, and a data flow based cyber-side model considering cyber attacks are formulated. Secondly, in order to analyze cyber attacks, the correlation matrix of attack method and attack target and a bi-level programming model considering the behavior of the attacker and the dispatching center are established. Then, based on the characteristics of load redistribution and Shapley value method, a vulnerability index calculation method based on attack consequences and vulnerability assessment process are proposed. Finally, the simulation is carried out on a 38-bus system to assess the vulnerability of the microgrid cyber physical system against cyber attacks, and the effectiveness of the proposed method and its guiding significance for formulating defense strategy are analyzed and verified.更多还原