Measurement of a power system nominal voltage, frequency and voltage flicker parameters

We present, in this paper, an approach for identifying the frequency and amplitude of voltage flicker signal that imposed on the nominal voltage signal, as well as the amplitude and frequency of the nominal signal itself. The proposed algorithm performs the estimation in two steps; in the first step the original voltage signal is shifted forward and backward by an integer number of sample, one sample in this paper. The new generated signals from such a shift together with the original one is used to estimate the amplitude of the original signal voltage that composed of the nominal voltage and flicker voltage. The average of this amplitude gives the amplitude of the nominal voltage; this amplitude is subtracted from the original identified signal amplitude to obtain the samples of the flicker voltage. In the second step, the argument of the signal is calculated by simply dividing the magnitude of signal sample with the estimated amplitude in the first step. Calculating the arccosine of the argument, the frequency of the nominal signal as well as the phase angle can be computing using the least error square estimation algorithm. Simulation examples are given within the text to show the features of the proposed approach.

[1]  Waldemar Rebizant,et al.  Power system frequency estimation , 1998 .

[2]  Chi-Jui Wu,et al.  A novel method for estimating voltage flicker , 2005, IEEE Transactions on Power Delivery.

[3]  G. S. Christensen,et al.  Dynamic Tracking of The Steady State Power System Magnitude and Frequency Using Linear Kalman Filter a Variable Frequency Model , 1992 .

[4]  Mladen Kezunovic,et al.  New digital signal processing algorithms for frequency deviation measurement , 1991 .

[5]  H.J. Altuve,et al.  A new digital filter for phasor computation. II. Evaluation , 1997, Proceedings of the 20th International Conference on Power Industry Computer Applications.

[6]  J. A. de la O Serna,et al.  A new digital filter for phasor computation. I. Theory , 1997, Proceedings of the 20th International Conference on Power Industry Computer Applications.

[7]  Ali Abur,et al.  Flicker study using a novel arc furnace model , 2002 .

[8]  M. S. Sachdev,et al.  An iterative technique for fast and accurate measurement of power system frequency , 1998 .

[9]  C. W. Liu,et al.  A Precise Calculation of Power System Frequency , 2001, IEEE Power Engineering Review.

[10]  Wu Jiekang,et al.  High-accuracy, wide-range frequency estimation methods for power system signals under nonsinusoidal conditions , 2005, IEEE Transactions on Power Delivery.

[11]  M.R. Iravani,et al.  Estimation of frequency and its rate of change for applications in power systems , 2004, IEEE Transactions on Power Delivery.

[12]  Chika O. Nwankpa,et al.  Identification of capacitor position in a radial system , 1999 .

[13]  Shih-Shong Yen,et al.  A flexible voltage flicker teaching facility for electric power quality education , 1998 .

[14]  A. A. Girgis,et al.  Measurement of voltage flicker magnitude and frequency using a Kalman filtering based approach , 1996, Proceedings of 1996 Canadian Conference on Electrical and Computer Engineering.

[15]  A. T. Johns,et al.  Model system tests on a new numeric method of power system frequency measurement , 1996 .

[16]  Shyh-Jier Huang,et al.  Application of continuous wavelet transform for study of voltage flicker-generated signals , 2000, IEEE Trans. Aerosp. Electron. Syst..

[17]  A. T. Johns,et al.  Frequency relaying based on instantaneous frequency measurement [power systems] , 1996 .

[18]  K. Srinivasan,et al.  Digital measurement of voltage flicker , 1991 .

[19]  S. Nuccio.  A digital instrument for measurement of voltage flicker , 1997, IEEE Instrumentation and Measurement Technology Conference Sensing, Processing, Networking. IMTC Proceedings.

[20]  O. Ozgun,et al.  Flicker Study Using a Novel ARC Furnace Model , 2002, IEEE Power Engineering Review.

[21]  G. Heydt,et al.  Voltage flicker estimation based on linearization and L/sub p/ norms , 2003 .

[22]  Tarlochan S. Sidhu,et al.  Accurate measurement of power system frequency using a digital signal processing technique , 1999, IEEE Trans. Instrum. Meas..

[23]  M. Kezunovic,et al.  New digital signal processing algorithms for frequency deviation measurement , 1991, Proceedings of the 1991 IEEE Power Engineering Society Transmission and Distribution Conference.

[24]  E.F. El-Saadany,et al.  A novel energy operator algorithm for voltage envelope tracking , 2005, IEEE Transactions on Power Systems.

[25]  E.F. El-Saadany,et al.  Online tracking of voltage flicker utilizing energy operator and Hilbert transform , 2004, IEEE Transactions on Power Delivery.

[26]  Michel Meunier,et al.  New signal processing tools applied to power quality analysis , 1999 .

[27]  J. Rezmer,et al.  Real-time determination of power system frequency , 1996, Quality Measurement: The Indispensable Bridge between Theory and Reality (No Measurements? No Science! Joint Conference - 1996: IEEE Instrumentation and Measurement Technology Conference and IMEKO Tec.

[28]  E.F. El-Saadany,et al.  Envelope tracking techniques for FlickerMitigation and Voltage regulation , 2004, IEEE Transactions on Power Delivery.

[29]  Jyh-Cherng Gu,et al.  A novel method for estimating voltage flicker , 2005 .

[30]  M. E. El-Hawary,et al.  Measurement of Voltage Flicker Magnitude and Frequency in a Power System For Power Quality Analysis , 1999 .

[31]  H. J. Altuve,et al.  A new digital filter for phasor computation. I. Theory [power system protection] , 1998 .

[32]  Miodrag D. Kusljevic,et al.  A simple recursive algorithm for frequency estimation , 2004, IEEE Transactions on Instrumentation and Measurement.

[33]  Vladimir Terzija,et al.  Voltage phasor and local system frequency estimation using Newton type algorithm , 1994 .

[34]  G. S. Christensen,et al.  Estimating of steady state voltage and frequency of power systems from digitized bus voltage samples , 1991 .

[35]  P. Djurić,et al.  Frequency tracking in power networks in the presence of harmonics , 1993 .

[36]  I. Diaz,et al.  A new digital filter for phasor computation. II. Evaluation [power system protection] , 1998 .

[37]  Adly A. Girgis,et al.  Measurement and prediction of voltage flicker magnitude and frequency , 1995 .

[38]  Ganapati Panda,et al.  Frequency estimation of distorted power system signals using extended complex Kalman filter , 1999 .

[39]  Vladimir V. Terzija,et al.  Improved recursive Newton-type algorithm for frequency and spectra estimation in power systems , 2003, IEEE Trans. Instrum. Meas..

[40]  Milenko B. Djurić,et al.  A new self-tuning algorithm for the frequency estimation of distorted signals , 1995 .