SYSTEMS AND METHODS FOR UNDER-FREQUENCY BLACKOUT PROTECTION
First Claim
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.
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Accused Products
Abstract
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.
31 Citations
15 Claims
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1. A system for detecting an rotor speed condition on an electric power delivery system, comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for detecting a condition on an electric power delivery system using a central intelligent electronic device (IED), comprising:
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detecting at a plurality of IEDs each in communication with one of a plurality of electric generators, rotor positions of the generators using a rotor position detection device; determining, at the plurality of IEDs, speeds of the generators using the rotor positions; determining, at the plurality of IEDs, a rotor speed condition using the frequencies; transmitting the rotor speed conditions to a central IED; determining, at the central IED, which generators are connected to common isolated sub-grids using the rotor speed conditions. - View Dependent Claims (8, 9, 10, 11, 12)
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13. An intelligent electronic device (IED) associated with an electric power delivery system, the IED comprising:
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an interface configured to receive rotor speed information and rotor position information from a plurality of remote IEDs; a processor communicatively coupled to the interface a computer-readable storage medium communicatively coupled to the processor, the computer-readable storage medium storing instructions that when executed by the processor cause the processor to determine, based on the rotor speed information and the rotor position information from the plurality of remote IEDs, which generators of a plurality of generators are connected on a common isolated sub-grid of the electric power delivery system. - View Dependent Claims (14, 15)
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Specification