Robust and cybersecure coordinated unintentional island detection for microgrids

A system comprising:

• a control system comprising
• at least one hardware processor, and
• software configured to, when executed by the at least one hardware processor,
• monitor transmissions from a plurality of UI detection sources to identify indications of unintentional islanding from the plurality of UI detection sources, and
• perform detection of unintentional islanding of the DER circuit by,
• while indications of unintentional islanding are identified during a time window from fewer than a consensus number of the plurality of UI detection sources, determining that unintentional islanding is not detected, wherein the consensus number is greater than one, and,
• when indications of unintentional islanding are identified during the time window from the consensus number of the plurality of UI detection sources, determining that unintentional islanding is detected,
• wherein the transmissions from one or more of the plurality of UI detection sources each comprises a plurality of measurements, and wherein the software is further configured to identify the indication of unintentional islanding in the transmission from each of the one or more UI detection sources by:
• for each of the plurality of measurements, determining whether the measurement satisfies a respective measurement threshold;
• when a threshold number of the plurality of measurements satisfy the respective measurement threshold, determining that an indication of unintentional islanding is identified in the transmission, wherein the threshold number is greater than one;
• and,
• when the threshold number of the plurality of measurements do not satisfy the respective measurement threshold, determining that an indication of unintentional islanding is not identified in the transmission.

A non-transitory computer-readable medium having instructions stored thereon, wherein the instructions, when executed by a processor, cause the processor to:

• monitor transmissions from a plurality of UI detection sources to identify indications of unintentional islanding from the plurality of UI detection sources;
• and
• perform detection of unintentional islanding of the DER circuit by,
• while indications of unintentional islanding are identified during a time window from fewer than a consensus number of the plurality of UI detection sources, determining that unintentional islanding is not detected,
• wherein the consensus number is greater than one, and, when indications of unintentional islanding are identified during the time window from the consensus number of the plurality of UI detection sources, determining that unintentional islanding is detected;
• wherein the transmissions from one or more of the plurality of UI detection sources each comprises a plurality of measurements, and wherein instructions comprise identifying the indication of unintentional islanding in the transmission from each of the one or more UI detection sources by:
• for each of the plurality of measurements, determining whether the measurement satisfies a respective measurement threshold;
• when a threshold number of the plurality of measurements satisfy the respective measurement threshold, determining that an indication of unintentional islanding is identified in the transmission, wherein the threshold number is greater than one;
• and,
• when the threshold number of the plurality of measurements do not satisfy the respective measurement threshold, determining that an indication of unintentional islanding is not identified in the transmission.