2013/04/15 by Suzhi Bi, Jun Ying, Bi, Suzhi +2
Computer Science · Engineering · #Electricity Theft Detection Techniques #FOS: Computer and information sciences #Internet Traffic Analysis and Secure E-voting #Other Computer Science (cs.OH) #Smart Grid Security and Resilience
paper · pdf · doi:10.48550/arxiv.1304.4151
openalex publication_date 2013/04/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The normal operation of power system relies on accurate state estimation that faithfully reflects the physical aspects of the electrical power grids. However, recent research shows that carefully synthesized false-data injection attacks can bypass the security system and introduce arbitrary errors to state estimates. In this paper, we use graphical methods to study defending mechanisms against false-data injection attacks on power system state estimation. By securing carefully selected meter measurements, no false data injection attack can be launched to compromise any set of state variables. We characterize the optimal protection problem, which protects the state variables with minimum number of measurements, as a variant Steiner tree problem in a graph. Based on the graphical characterization, we propose both exact and reduced-complexity approximation algorithms. In particular, we show that the proposed tree-pruning based approximation algorithm significantly reduces computational complexity, while yielding negligible performance degradation compared with the optimal algorithms. The advantageous performance of the proposed defending mechanisms is verified in IEEE standard power system testcases.