Set-theoretic detection of data corruption attacks on cyber physical power systems

• 作者: Anthony TZES Efstathios KONTOURAS Leonidas DRITSAS
• 来源期刊: 现代电力系统与清洁能源学报(英文)
• 学科: 工学
• 关键词: Power systems LOAD frequency control Cyber-attacks Set-theoretic methods
• 年，卷（期）: 2018,（5）
• 页码范围: 872-886
• 页数: 15页
• 分类号: TM76

摘要

This paper addresses a set-theoretic method for the detection of data corruption cyber-attacks on the load frequency control loop of a networked power system. The system consists of several interconnected control areas forming a power grid. Based on the overall discrete-time network dynamics, a convex and compact polyhedral robust invariant set is extracted and is used as a set-induced anomaly detector. If the state vector exits the invariant set,then an alarm will be activated, and the potential threat is considered disclosed. The attack scenario used to assess the efficiency of the proposed anomaly detector concerns corrupted frequency sensor measurements transmitted to the automatic generation control unit of a compromised control area. Simulation studies highlight the ability of a set-theoretic approach to disclose persistent and intermittent attack patterns even when they occur at the same time with changes in the power load demand.