Science Daily February 26, 2019
To monitor the power grid substation activities researchers at the Georgia Institute of Technology have developed a radio frequency-based distributed intrusion detection system (RFDIDS) that utilizes a radio receiver as a diagnostic tool to provide air-gapped, independent, and verifiable information about the radio emissions from substation components, particularly at low frequencies. The simulation and experimental results verified that four types of diagnostic information can be extracted from radio emissions of power system substation circuits: i) harmonic content of the circuit current, ii) fundamental frequency of the circuit current, iii) impulsive signals from rapid circuit current changes, and iv) sferics from global lightning strokes. Each or a combination of the first three diagnostics can be effectively leveraged to directly detect specific types of power grid attacks and the fourth one to check the integrity of the receiver’s signal. Simulation and real-world experimental results verified the effectiveness of the technique…read more. Open Source TECHNICAL ARTICLEÂ