用预测模型检测电力系统中的虚假数据攻击,提升安全性。
Detection of False Data Injection Attacks (FDIA) on Power Dynamical Systems With a State Prediction Method
- 基于LSTM和图神经网络预测频率动态,识别异常
- 在含噪声条件下仍保持高精度检测效果
- 适合电力系统安全监控与攻防场景
随着逆变器资源在电力系统中渗透加深,虚假数据注入攻击(FDIA)成为日益严重的网络安全威胁,可能破坏系统稳定性如频率稳定,引发灾难性故障。因此,发展有效的FDIA检测方法至关重要。FDIA通常导致系统期望行为与实际行为之间出现偏差,可通过功率动态预测来识别此类偏差。本文研究了时序及时空状态预测模型(如长短期记忆网络LSTM、图神经网络与LSTM结合)在无FDIA但存在测量噪声情况下的频率动态预测能力,进而实现对FDIA事件的检测。以采用摆动方程模拟的IEEE 39节点新英格兰简化模型为例,结果表明,所提出的预测模型可作为高效FDIA检测方法的核心组件,在多种攻击和部署场景下维持高检测精度。同时,文章还探讨了如何部署检测机制,以降低误报风险并减轻计算负担。
原文摘要 · Abstract (English)
With the deeper penetration of inverter-based resources in power systems, false data injection attacks (FDIA) are a growing cyber-security concern. They have the potential to disrupt the system's stability like frequency stability, thereby leading to catastrophic failures. Therefore, an FDIA detection method would be valuable to protect power systems. FDIAs typically induce a discrepancy between the desired and the effective behavior of the power system dynamics. A suitable detection method can leverage power dynamics predictions to identify whether such a discrepancy was induced by an FDIA. This work investigates the efficacy of temporal and spatio-temporal state prediction models, such as Long Short-Term Memory (LSTM) and a combination of Graph Neural Networks (GNN) with LSTM, for predicting frequency dynamics in the absence of an FDIA but with noisy measurements, and thereby identify FDIA events. For demonstration purposes, the IEEE 39 New England Kron-reduced model simulated with a swing equation is considered. It is shown that the proposed state prediction models can be used as a building block for developing an effective FDIA detection method that can maintain high detection accuracy across various attack and deployment settings. It is also shown how the FDIA detection should be deployed to limit its exposure to detection inaccuracies and mitigate its computational burden.
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