An Efficient Two-Point DFT Interpolation Approach for M-Class Synchrophasor Measurement

Synchrophasor measurement, a rapidly evolving technology, is vital in monitoring and controlling smart grid applications. It facilitates effective real-time supervision and control of the power system throughout its operation. The methodology of phasor estimation has a crucial role in ensuring the reliability of the synchrophasor measurement. This work attempts to achieve the performance requirement of the synchrophasor measurement using an efficient two-point DFT interpolation approach. The method estimates the frequency deviation factor using an efficient interpolation approach that relates two peak points of the magnitude response obtained from the DFT of the signal, without applying a window function. Further, the magnitude and phase angle of the given signal are estimated using the interpolation approach, along with the frequency and rate of change of frequency (ROCOF). The performance of the proposed approach is assessed in compliance with the IEC/IEEE 60255-118-1:2018 standard and also compared with the reference model. The evaluation demonstrates that the efficient two-point DFT interpolation method satisfactorily meets the required performance criteria.