Real-time implementation of phasor measurement unit using NI CompactRIO

Phasor measurement unit (PMU) is certainly a massive boon in the wide-area measurement system which facilitates synchronized real-time measurements of remote areas present in the grid. In this paper, Phasor Measurement Unit (PMU) is implemented in LabVIEW for real-time monitoring of various power system quantities. PMU is designed and simulated in LabVIEW and implemented in real-time using NI CompactRIO with the help of Global Positioning System (GPS) receivers. Non-recursive and Recursive Discrete Fourier Transform (DFT) algorithms have been used to estimate voltage and current phasors time tagged with Universal Coordinated Time (UTC). Frequency and Rate of Change of Frequency (ROCOF) have also been estimated in real time.