Phasor measurement units, synchrophasor systems and methods thereof

A device comprising:

• a voltage input sensor circuit operative to sense line voltage from the AC power system and generate at least one voltage signal representative of the line voltage sensed from the AC power system;
• a current input sensor circuit operative to sense line current from the AC power system and generate at least one current signal representative of the line current sensed from the AC power system;
• a plurality of analog-to-digital converter circuits configured to sample the at least one voltage signal and the at least one current signal to output digital samples representative of the at least one voltage signal and the at least one current signal;
• at least one processor operatively coupled to the plurality of analog-to-digital converter circuits and configured to perform at least one mathematical computation on the digital samples received from the analog-to-digital converter circuits, at least one mathematical computation including determining a magnitude and phase angle of each of the at least one voltage signal and the at least one current signal;
• and
• a clock for time-stamping the determined magnitude and phase angle, the clock being time synchronized with an external time source.