A Data-Driven Time-Synchronization Method to Convert Power Quality Waveform Measurements into Synchro-Waveforms

Synchronized waveform measurements, also known as synchro-waveforms, are gaining increasing attention in advanced power systems monitoring in recent years. However, there is a major gap in this field in practice. Although many utilities do have an existing infrastructure to measure voltage and current waveforms, such as by using conventional power quality sensors, those existing waveform measurements are not time-synchronized. In this paper, we propose novel methods to achieve data-driven time-synchronization among the conventional power quality sensors solely based on the analysis of the time-series of waveform measurements using statistical and optimization techniques. This will enable utilities to take advantage of the emerging applications of synchro-waveforms without the need to replace or retrofit their existing sensors. Experimental results confirm the high performance of the proposed methods.