Identification of Successive 'Unobservable' Cyber Data Attacks in Power Systems Through Matrix Decomposition

Autor:	Gao, Pengzhi, Wang, Meng, Chow, Joe H., Ghiocel, Scott G., Fardanesh, Bruce, Stefopoulos, George, Razanousky, Michael P.
Rok vydání:	2016
Předmět:	Computer Science - Information Theory Computer Science - Systems and Control
Druh dokumentu:	Working Paper
DOI:	10.1109/TSP.2016.2597131
Popis:	This paper presents a new framework of identifying a series of cyber data attacks on power system synchrophasor measurements. We focus on detecting "unobservable" cyber data attacks that cannot be detected by any existing method that purely relies on measurements received at one time instant. Leveraging the approximate low-rank property of phasor measurement unit (PMU) data, we formulate the identification problem of successive unobservable cyber attacks as a matrix decomposition problem of a low-rank matrix plus a transformed column-sparse matrix. We propose a convex-optimization-based method and provide its theoretical guarantee in the data identification. Numerical experiments on actual PMU data from the Central New York power system and synthetic data are conducted to verify the effectiveness of the proposed method. Comment: 13 pages, accepted to IEEE Trans. Signal Processing
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1607.04776 Zobrazit plný text záznamu View this record from Arxiv