FDI攻击下互联电力系统的分布式安全状态估计

Distributed secure state estimation for interconnected power systems under FDI attacks

针对虚假数据注入(FDI)攻击下的多区域互联电力系统安全状态估计问题,提出一种分布式中间观测器,同时对各区域电力系统的状态、虚假数据注入攻击信号以及负载偏差进行估计.首先,通过将电力系统的状态和虚假数据注入攻击进行增广,得到等价的区域电力系统状态空间模型;然后,基于等价系统模型构建分布式中间观测器,对各个电力子系统分别进行安全状态估计,并设计补偿控制策略以降低虚假数据注入攻击及负载偏差带来的影响;最后,通过算例仿真验证所提出方法的可行性和有效性.

This paper focuses on the problem of multi-area interconnected power system secure state estimation under false data injection(FDI)attack.A distributed intermediate observer method is proposed to estimate the system states,FDI attack signals and load deviation of the system simultaneously.Firstly,the states of a power system and the FDI attack are augmented to obtain the equivalent state space model.Then,a distributed intermediate observer is constructed for each power subsystem to fulfill secure estimation,and a compensation control strategy is designed to reduce the impact of FDI attack and load deviation.Finally,the simulation results show that the proposed method is feasible and effective.