欺骗攻击环境下带有传感器故障的大规模电网分布式状态估计

Distributed H_∞ state estimation of large-scale power grid with sensor failure in spoofing attacks

本文研究了欺骗攻击环境下带有传感器故障的大规模电网分布式状态估计问题.通过引入拓扑关系来描述分布式传感器节点之间的相互关系,使用随机Bernoulli序列描述欺骗攻击模型及其随机特性.基于Lyapunov方法证明了带有传感器故障的系统在遭受欺骗攻击环境下的均方稳定及H_∞稳定的充分条件,并基于LMI设计了满足H_∞性能指标的分布式状态估计器.最后通过数值仿真验证了所设计估计器的有效性.

This paper studiesthe distributed state estimation problem of large-scale grid with sensor failures in spoofing attacks.The topological relations are introduced to describe the relationship between distributed sensor nodes.A Bernoulli random sequence is used to describe the spoofing attacks and its random characteristics.This article based on Lyapunov method proves the mean square stability and the H∞stability of this system.Based on the analysis results and LMI,a distributed state estimator which satisfies the H∞performance constraint is designed.Finally,the validity of the designed estimator is verified by numerical simulation.