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The Frequency Monitoring Network (FNET) has provided a low-cost and easy way to collect wide-area frequencies with high dynamic accuracy in North American power grids. In practice, frequency measurements collected by the Frequency Disturbance Recorders (FDRs) contain outliers such as missing segments or spikes due to hardware and/or network failure, and 1-D median filtering is commonly used to eliminate...
Frequency is an important parameter for the operation and control of power systems. One novel application of frequency measurements involves using this information to authenticate a digital audio/video recording presented as forensic evidence in legal proceedings. To apply this technique, called the electrical network frequency (ENF) criterion, both a reference frequency database and an accurate frequency...
The Electrical Network Frequency (ENF) criterion is a novel method for digital audio recording authentication in the field of forensic science. Both an accurate frequency estimation method and a reliable frequency reference database are the key requirements for this technique. This paper briefly introduces the Frequency Monitoring Network (FNET) at UTK and analyzes the frequency characteristics of...
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