Apparatus and method for estimating synchronized phasors at predetermined times referenced to an absolute time standard in an electrical system

A method for estimating a plurality of synchronized phasors at predetermined times referenced to an absolute time standard in an electrical power system, the method comprising:

• determining a frequency of a power system signal;
• sampling the power system signal at a sampling interval rate based on the frequency of the power system signal to form a plurality of signal samples;
• generating 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 absolute 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
• for each of the plurality of signal samples, adjusting the phasor magnitude and the phasor phase angle 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 absolute time standard to form the plurality of synchronized phasors.

A method for estimating a plurality of synchronized phasors at predetermined times referenced to an absolute time standard in an electrical power system, the method comprising:

• acquiring a power system signal
• determining a frequency of the power system signal;
• sampling the power system signal at a sampling interval rate based on a frequency of the power system signal to form a plurality of signal samples;
• generating a plurality of acquisition time values based on an occurrence of each of the plurality signal samples at a corresponding plurality of different times referenced to the absolute 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
• for each of the plurality of signal samples, interpolating the phasor magnitude and rotating phasor phase angle to form a corresponding plurality of referenced phasor magnitudes and referenced phasor phase angles of the plurality of synchronized phasors 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 absolute time standard.