Electrical Power and Energy Systems 91 (2017) 230–240Contents lists available at ScienceDirect Electrical Power and Energy Systems journal homepage: www.elsevier .com/locate / i jepesDetection of energy theft and defective smart meters in smart grids using linear regressionhttp://dx.doi.org/10.1016/j.ijepes.2017.04.005 0142-0615/ 2017 Elsevier Ltd. All rights reserved. Abbreviations: NTL, non-technical loss; UP, utility provider; SG, Smart Grid; SM, smart meter; AMI, Advanced Metering Infrastructure; NAN, neighborhood area network; MLR, multiple linear regression; RFID, radio frequency identification; SVM, support vector machine; GA, genetic algorithm; LUD, LU decomposition; DS, distribution station; TL, technical loss; LSE, linear system of equations; TOU, Time- of-Use. ⇑ Corresponding author at: UM Power Energy Dedicated Advanced Centre (UMPEDAC), Level 4, Wisma R&D University of Malaya, Jalan Pantai Baharu 59990 Kuala Lumpur, Malaysia. E-mail addresses: scyip@mmu.edu.