Synchronized Point on Wave Measurement

Point on wave measurement (POW) is the process of recording waveforms moving around the power system at a high rate of speed. By sampling the waveforms at 10kHz or above, transients and other phenomena can be faithfully recorded. This is especially important as the power system transitions toward power electronics technologies like those embedded in renewable resources.

Digital fault recorders, power quality monitors, and relays have recorded POW for years.  However, low-cost processors, high-speed communications, and ample storage have enabled continuous recording of POW measurements in time-synchronized way. Continuous recording requires new analytical methods which enables new use cases for assessing the health of the grid and associated equipment.

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