This study addresses incident handling during an adverse event for dynamical networked control systems. Incident handling can be divided into five steps: detection, analysis, containment, eradication, and recovery. For networked control systems, the containment step can be conducted through physical disconnection of an attacked subsystem. In accordance with the disconnection, the equipped attack detection unit should be reconfigured to maintain its detection capability. In particular, separating the detection subunit associated with the disconnected subsystem is considered as a specific reconfiguration scheme in this study. This paper poses the problem of disconnection-aware attack detection and isolation with the separation-based detector reconfiguration. The objective is to find an attack detection unit that preserves its detection and isolation capability even under any possible disconnection and separation. The difficulty arises from network topology variation caused by disconnection that can possibly lead to stability loss of the distributed observer inside the attack detection unit. A solution is proposed based on an existing controller design technique referred to as retrofit control. Furthermore, an application to low-voltage power distribution networks with distributed generation is exhibited. Numerical examples evidence the practical use of the proposed method through a benchmark distribution network.

中文翻译：

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断开感知攻击检测和隔离与基于分离的检测器重新配置

这项研究解决了动态网络控制系统在不利事件期间的事件处理问题。事件处理可分为五个步骤：检测、分析、遏制、根除和恢复。对于网络控制系统，可以通过物理断开受攻击子系统来执行遏制步骤。根据断线情况，对装备的攻击检测单元进行重新配置，以保持其检测能力。特别是，在本研究中，分离与断开子系统相关的检测子单元被认为是一种特定的重新配置方案。本文提出了基于分离的检测器重新配置的断开感知攻击检测和隔离问题。目标是找到一个攻击检测单元，即使在任何可能的断开和分离的情况下也能保持其检测和隔离能力。困难来自于断开连接引起的网络拓扑变化，这可能导致攻击检测单元内分布式观察器的稳定性损失。基于称为改造控制的现有控制器设计技术提出了一种解决方案。此外，还展示了在具有分布式发电的低压配电网络中的应用。数值例子证明了所提出的方法通过基准配电网络的实际使用。困难来自于断开连接引起的网络拓扑变化，这可能导致攻击检测单元内分布式观察器的稳定性损失。基于称为改造控制的现有控制器设计技术提出了一种解决方案。此外，还展示了在具有分布式发电的低压配电网络中的应用。数值例子证明了所提出的方法通过基准配电网络的实际使用。困难来自于断开连接引起的网络拓扑变化，这可能导致攻击检测单元内分布式观察器的稳定性损失。基于称为改造控制的现有控制器设计技术提出了一种解决方案。此外，还展示了在具有分布式发电的低压配电网络中的应用。数值例子证明了所提出的方法通过基准配电网络的实际使用。