Accuracy of DFT-based synchrophasor estimators at off-nominal frequencies

The accuracy of synchrophasor estimators is a well-known critical issue in systems for smart grid monitoring and control. This paper presents an in-depth analysis of the effect of off-nominal frequency deviations on single-cycle and multi-cycle DFT-based synchrophasor estimators. Unlike other qualitative or simulation-based results available in the literature, this work provides some accurate and easy-to-use expressions that can be used to keep the total vector error within given target uncertainty boundaries.

[1]  Paolo Castello,et al.  Measurement of synchrophasors under dynamic conditions , 2010, 2010 IEEE International Workshop on Applied Measurements for Power Systems.

[2]  A.G. Phadke,et al.  Synchronized Phasor and Frequency Measurement Under Transient Conditions , 2009, IEEE Transactions on Power Delivery.

[3]  Y. Xu,et al.  Synchronized phasor measuring method using recursive DFT with a window function , 2005, 2005 IEEE/PES Transmission & Distribution Conference & Exposition: Asia and Pacific.

[4]  A. G. Phadke,et al.  A Microcomputer Based Symmetrical Component Distance Relay , 1979 .

[5]  Magnus Akke,et al.  Sample Value Adjustment Improves Phasor Estimation at Off-Nominal Frequencies , 2010, IEEE Transactions on Power Delivery.

[6]  Arun G. Phadke,et al.  Synchronized Phasor Measurements and Their Applications , 2008 .

[7]  Joe-Air Jiang,et al.  A Full- and Half-Cycle DFT-based technique for fault current filtering , 2010, 2010 IEEE International Conference on Industrial Technology.

[8]  Zhaosheng Teng,et al.  Harmonic Phasor Analysis Based on Improved FFT Algorithm , 2011, IEEE Transactions on Smart Grid.

[9]  Yuanzhang Sun,et al.  A practical method to improve phasor and power measurement accuracy of DFT algorithm , 2006 .

[10]  D. Petri,et al.  The influence of windowing on the accuracy of multifrequency signal parameter estimation , 1992 .

[11]  T. Sidhu,et al.  A new half-cycle phasor estimation algorithm , 2005, IEEE Transactions on Power Delivery.

[12]  Tevfik Sezi,et al.  Considerations about synchrophasors measurement in dynamic system conditions , 2009 .

[13]  Dario Petri,et al.  Weighting effect on the discrete time Fourier transform of noisy signals , 1991 .

[14]  M. Paolone,et al.  Synchronized phasors monitoring during the islanding maneuver of an active distribution network , 2010, 2010 Innovative Smart Grid Technologies (ISGT).

[15]  Christian Riesch,et al.  IEEE 1588 for time synchronization of devices in the electric power industry , 2010, 2010 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control and Communication.