CNFD: A novel scheme to detect colluded non-technical loss fraud in smart grid

Abstract

We newly discovered a potential fraud in Smart Grid, called colluded non-technical loss fraud. Different from the traditional nontechnical loss frauds where there is only one independent adversary, a colluded non-technical loss fraud happens when a smart meter is tampered by one or more co-existing or collaborating adversaries. The behavior of one adversary may be covered by others and cannot be detected easily by the traditional detection methods. We propose Colluded Non-Technical Loss Fraud Detection (CNFD), a scheme to detect colluded non-technical loss frauds in Smart Gird. CNFD adopts recursive least squares to identify a tampered meter and then to differentiate adversaries based on their mathematical features. Experimental results show that CNFD can detect colluded non-technical loss frauds and can differentiate different adversaries on the same meter.