SYSTEMS AND METHODS FOR UNDER-FREQUENCY BLACKOUT PROTECTION

摘要

Detection of which generators are connected using a common, isolated sub-grid using information from intelligent electronic devices (IEDs) in communication with each generator is disclosed herein. Each IED receives rotor position information from a rotor position detection device of the generator. Each IED may then calculate rotor speed, information of the generator and transmit such information to a central IED. The central IED uses the rotor speed information to determine which generators are connected to a common, isolated sub-grid. The central IED may further use rotor position, rotor speed, and rate-of-change-of-speed information either calculated at the central IED or transmitted from the IEDs.

主权项

1. A system for detecting an rotor speed condition on an electric power delivery system, comprising:
a plurality of generators each in electrical communication to supply electrical power to the electric power delivery system, a plurality of generator rotor position detection devices, each in communication with one generator of the plurality of generators, configured to output a signal corresponding with a rotor position of the generator; a plurality of intelligent electronic devices (IEDs), each IED of the plurality of IEDs in communication with one of the generators and with one of the generator rotor position detection devices, the plurality of IEDs each configured to detect an rotor speed condition using the output of the generator rotor position detection device in communication therewith and to communicate the rotor speed condition; and a central IED communicatively coupled with the plurality of IEDs, the central IED configured to determine which generators of the plurality of generators are connected on a common isolated sub-grid based on the rotor speed conditions communicated from the plurality of IEDs.