Detection of islanding in power grids

Details Detection of islanding in power grids Detection of islanding in power grids

2008-05-20

2008-05-20

Picard, Leo (Department: 2125)

Data processing: generic control systems or specific application

Specific application, apparatus or process

Electrical power generation or distribution system

C700S286000

Reexamination Certificate

active

07376491

ABSTRACT:
A method for detecting islanding conditions in an electrical grid having a power line voltage includes monitoring a detectable signal different from the power line voltage at a generating station, superimposing the detectable signal onto the power line voltage at a grid point outside the generating station, and switching the generating station from a grid-connected mode of operation to an islanded mode of operation when the signal to which the detector is responsive is determined to be absent.

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