Measure of the Absolute Phase Angle of a Power Frequency Sinewave with Respect to UTC

This paper presents a method to measure the absolute phase angle of a power frequency sinewave with respect to the passage of the UTC second. The need for such a technic arises during the calibration or adjustment of PMUs or SAMUs. The accuracy of these instruments depends on their ability to measure the absolute phase. The principle of the method is based on a phase comparison between a sine wave and the fundamental component of a square wave of identical frequency. The absolute phase angle of the square wave is first established against the PPS signal of an atomic clock.