Detection of electric power system anomalies in streaming measurements

A method for identifying an anomaly in a stream of measurements, the method comprising:

• receiving a stream of measurements representing electrical conditions within a portion of an electrical power system;
• generating a data archive comprising a statistical representation of the stream of measurements;
• dividing the stream of measurements into a plurality of data windows;
• transforming each of the plurality of data windows to a plurality of frequency domain representations;
• generating a normalized plurality of frequency domain representations based on the data archive;
• grouping the normalized plurality of frequency domain representations into a plurality of sub-harmonic frequency ranges;
• performing a comparison of the normalized plurality of frequency domain representations to at least one threshold;
• determining that the comparison indicates an anomalous condition;
• providing a report to a display of an electronic device based on the anomalous condition to alert an operator to detection of the anomalous condition.

A system configured to identify an anomaly in a stream of measurements, the system comprising:

• a communications interface configured to receive a stream of measurements;
• an archive subsystem configured to maintain a data archive comprising a statistical representation of the stream of measurements;
• a pre-processing subsystem configured to divide the stream of measurements into a plurality of data windows;
• an analysis subsystem configured to:
• generate a normalized plurality of representations based on the plurality of data windows and the data archive;
• group the normalized plurality of representations into a plurality of sub-harmonic ranges;
• and
• an anomaly detection subsystem configured to:
• perform a comparison of the plurality of normalized representations to at least one threshold and to determine that the comparison indicates an anomalous condition;
• an action subsystem configured to provide a report to a display of an electronic device based on the anomalous condition to alert an operator to detection of the anomalous condition.