efwoinef digital relays
TRANSCRIPT
efwoinef
Digital Relays
Inventor(s) Expertise
Dr. Sukumar BrahmaElectrical and Computer Engineering,New Mexico State University
Dr. Phillip DeLeonElectrical and Computer Engineering,New Mexico State University
CLAIMS: • Method for determining and applying a preferred
oversampling rate• Phasor estimates of claimed invention are same as phasor
estimates of a conventional digital relay that uses an anti-aliasing filter (AAF)
OVERVIEW:Conventional digital relays use expensive AAFs that introduce unwanted delay to phasor estimation of power system fault waveforms.
This technology uses a phasor estimation functions which employs an oversampling technique to eliminate the cost and delay associated with the implementation of AAFs.
NOVELTIES:• Uses oversampling technique to eliminate AAFs• Satisfactory results for audio-band sampling rates:
48 KHz and 24 KHz
ADVANTAGES:• Applied to any numerical relay, irrespective of its function or
application field• Reduced overall cost, board space, and delay associated AAF
implementation
APPLICATIONS:• Distribution feeder protection• Down conductor detection• Breaker failure protection• Generator and transmission line protection• Transformer protection and control• Bus and motor protection
Property of Arrowhead Center. Do not duplicate/distribute.
For more information please contact: Terry Lombard at 575.646.2791 or [email protected]
Oversampling Technique to EliminateAnti-Aliasing Filter