Extended Distributed State Estimation: A Detection Method against Tolerable False Data Injection Attacks in Smart Grids

Dai Wang, Xiaohong Guan, Ting Liu, Yun Gu, Chao Shen and Zhanbo Xu
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Dai Wang: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Xiaohong Guan: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Ting Liu: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Yun Gu: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Chao Shen: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
Zhanbo Xu: Systems Engineering Institute, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China

Energies, 2014, vol. 7, issue 3, 1-22

Abstract: False data injection (FDI) is considered to be one of the most dangerous cyber-attacks in smart grids, as it may lead to energy theft from end users, false dispatch in the distribution process, and device breakdown during power generation. In this paper, a novel kind of FDI attack, named tolerable false data injection (TFDI), is constructed. Such attacks exploit the traditional detector’s tolerance of observation errors to bypass the traditional bad data detection. Then, a method based on extended distributed state estimation (EDSE) is proposed to detect TFDI in smart grids. The smart grid is decomposed into several subsystems, exploiting graph partition algorithms. Each subsystem is extended outward to include the adjacent buses and tie lines, and generate the extended subsystem. The Chi-squares test is applied to detect the false data in each extended subsystem. Through decomposition, the false data stands out distinctively from normal observation errors and the detection sensitivity is increased. Extensive TFDI attack cases are simulated in the Institute of Electrical and Electronics Engineers (IEEE) 14-, 39-, 118- and 300-bus systems. Simulation results show that the detection precision of the EDSE-based method is much higher than that of the traditional method, while the proposed method significantly reduces the associated computational costs.

Keywords: smart grids; security; false data injection (FDI); bad data detection; extended distributed state estimation (EDSE) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2014
References: View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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