Protective relay with synchronized phasor measurement capability for use in electric power systems
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United States of America Patent
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Jan 18, 2005
Issued Date -
N/A
app pub date -
Dec 5, 2003
filing date -
Apr 17, 2002
priority date (Note) -
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Abstract
The relay system obtains voltage and current values from a power line and uses a first sampling element to sample the voltage and current values at selected intervals of time. The resulting sampled signals are used for power system-wide protection, control, monitoring and metering. The sampled signals are then resampled at a rate which is a selected multiple of the power system frequency. The results of the resampling are used by processing circuitry for protection functions including fault determinations.
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