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Title: Synchrophasor Data Correction under GPS Spoofing Attack: A State Estimation Based Approach

GPS spoofing attack (GSA) has been shown to be one of the most imminent threats to almost all cyber-physical systems incorporated with the civilian GPS signal. Specifically, for our current agenda of the modernization of the power grid, this may greatly jeopardize the benefits provided by the pervasively installed phasor measurement units (PMU). In this study, we consider the case where synchrophasor data from PMUs are compromised due to the presence of a single GSA, and show that it can be corrected by signal processing techniques. In particular, we introduce a statistical model for synchrophasorbased power system state estimation (SE), and then derive the spoofing-matched algorithms for synchrophasor data correction against GPS spoofing attack. Different testing scenarios in IEEE 14-, 30-, 57-, 118-bus systems are simulated to show the proposed algorithms’ performance on GSA detection and state estimation. Numerical results demonstrate that our proposed algorithms can consistently locate and correct the spoofed synchrophasor data with good accuracy as long as the system observability is satisfied. Finally, the accuracy of state estimation is significantly improved compared with the traditional weighted least square method and approaches the performance under the Genie-aided method.
Authors:
 [1] ;  [2] ; ORCiD logo [3]
  1. Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Electricity Infrastructure
  2. Schlumberger, Sugar Land, TX (United States). Pressure Pumping and Chemistry Product Group
  3. Univ. of Wyoming, Laramie, WY (United States). Dept. of Electrical and Computer Engineering
Publication Date:
Report Number(s):
PNNL-SA-129371
Journal ID: ISSN 1949-3053
Grant/Contract Number:
AC05-76RL01830; SC0012671; OE0000657
Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Smart Grid
Additional Journal Information:
Journal Name: IEEE Transactions on Smart Grid; Journal ID: ISSN 1949-3053
Publisher:
IEEE
Research Org:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States); Univ. of Wyoming, Laramie, WY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Electricity Delivery and Energy Reliability (OE)
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; phasor measurement units; global positioning system; synchronization; state estimation; current measurement; power grids; voltage measurement
OSTI Identifier:
1438224