Improved interpolated dynamic DFT synchrophasor estimator considering second harmonic interferences

The interpolated dynamic DFT (IpD2FT) is one of the most accurate dynamic synchrophasor estimation methods. But it suffers from infiltration from the second harmonic component. In this paper, the estimation errors of the IpD2FT caused by second harmonic interferences are firstly analyzed. Based on this, an improved interpolated dynamic DFT (IIpD2 FT) synchrophasor estimator that considers second harmonic interferences are proposed. Multiple simulation tests show that, even under large second harmonic interference conditions, the IIpD2FT is much more accurate than the IpD2FT.

[1]  Daniel Belega,et al.  Accuracy Analysis of the Multicycle Synchrophasor Estimator Provided by the Interpolated DFT Algorithm , 2013, IEEE Transactions on Instrumentation and Measurement.

[2]  Dario Petri,et al.  A Frequency-Domain Algorithm for Dynamic Synchrophasor and Frequency Estimation , 2014, IEEE Transactions on Instrumentation and Measurement.

[3]  José Antonio de la O. Serna,et al.  Dynamic Harmonic Analysis Through Taylor–Fourier Transform , 2011, IEEE Transactions on Instrumentation and Measurement.

[4]  José Antonio de la O. Serna,et al.  Dynamic Phasor and Frequency Estimates Through Maximally Flat Differentiators , 2010, IEEE Transactions on Instrumentation and Measurement.

[5]  Om P. Malik,et al.  Accurate Dynamic Phasor Estimation Based on the Signal Model Under Off-Nominal Frequency and Oscillations , 2017, IEEE Transactions on Smart Grid.

[6]  Daniel Belega,et al.  Dynamic Phasor and Frequency Measurements by an Improved Taylor Weighted Least Squares Algorithm , 2015, IEEE Transactions on Instrumentation and Measurement.

[7]  Dario Petri,et al.  Accuracy Analysis and Enhancement of DFT-Based Synchrophasor Estimators in Off-Nominal Conditions , 2012, IEEE Transactions on Instrumentation and Measurement.

[8]  Z.Q. Bo,et al.  A Dynamic Synchrophasor Estimation Algorithm for Online Application , 2010, IEEE Transactions on Power Delivery.

[9]  Zhengyou He,et al.  A Modified Dynamic Synchrophasor Estimation Algorithm Considering Frequency Deviation , 2017, IEEE Transactions on Smart Grid.

[10]  José Antonio de la O. Serna,et al.  Dynamic Phasor Estimates for Power System Oscillations , 2007, IEEE Transactions on Instrumentation and Measurement.

[11]  Mario Paolone,et al.  Enhanced Interpolated-DFT for Synchrophasor Estimation in FPGAs: Theory, Implementation, and Validation of a PMU Prototype , 2014, IEEE Transactions on Instrumentation and Measurement.

[12]  Yilu Liu,et al.  A Clarke Transformation-Based DFT Phasor and Frequency Algorithm for Wide Frequency Range , 2018, IEEE Transactions on Smart Grid.

[13]  J. H. Chow,et al.  Second Harmonic Filtering in Phasor Measurement Estimation , 2013, IEEE Transactions on Power Delivery.

[14]  Tianshu Bi,et al.  Dynamic Phasor Model-Based Synchrophasor Estimation Algorithm for M-Class PMU , 2015, IEEE Transactions on Power Delivery.