Patent ID: 8494795
Filing Date: 2013-07-23
Classification: G01R,Y02E,Y04S

Abstract:
1. An apparatus for estimating a plurality of synchronized phasors at predetermined times referenced to common time standard in an electrical power system, the apparatus comprising: a sampling means configured to sample a power system signal at a select sampling interval rate to form a plurality of signal samples; a time controller configured to generate a plurality of acquisition time values based on an occurrence of each of the plurality signal samples at a corresponding plurality of sample times referenced to the common time standard, each of the plurality of acquisition time values associated with a phasor magnitude and a phasor phase angle of each of the plurality of signal samples; and a phasor estimator configured to adjust the phasor magnitude and the phasor phase angle for each of the plurality of signal samples based on a time difference between a corresponding selected acquisition time value of the plurality of acquisition time values and a predetermined time of the predetermined times referenced to the common time standard to form the plurality of synchronized phasors.