Power signaling based technique for detecting islanding...

Electrical transmission or interconnection systems – Plural supply circuits or sources – Plural generators

Reexamination Certificate

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C361S020000

Reexamination Certificate

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11116211

ABSTRACT:
A signaling system for detecting power line discontinuity in a power distribution system having a local power generator in a feeder line employs a signal generator that provides a local generator control signal with a preset protocol continuously and is located in the power distribution system upstream of said local power generator. A power detector terminates the local generator control signal and a signal detector in said feeder line detects the presence of the signal and triggers the shutdown of the local generator when the signal is not detected by the signal detector for a predefined period of time.

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