전기학회논문지 (The Transactions of The Korean Institute of Electrical Engineers)

  • 제62권7호
  • /
  • Pages.891-897
  • /
  • 2013
  • /
  • 1975-8359(pISSN)
  • /
  • 2287-4364(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
권호 표지
DOI QR코드

DOI QR Code

잡음영향의 저감을 위한 두 디지털 필터들의 사용에 의한 DFT 기반의 계통주파수 추정

DFT-based Power System Frequency Estimation using Two Digital Filters for Noise Effect Reduction

  • 투고 : 2012.10.26
  • 심사 : 2013.06.26
  • 발행 : 2013.07.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

The power system frequency plays an important role in monitoring and controlling the power system. The frequency can be measured through discrete Fourier transform (DFT) coefficients of its positive fundamental frequency. The accuracy of the frequency estimate is severely affected by noise in the power system signal and the leakage effect of the negative fundamental frequency in DFT. This paper proposes a DFT-based frequency estimation algorithm to cope with the noise as well as the leakage effect. In this algorithm, two suitable digital filters are introduced to reduce efficiently frequency estimate error due to the noise. These filters are designed to use a digital bandpass filter and a second-degree integrator. The effectiveness of the proposed algorithm in reduction of frequency estimate error is verified through simulations on noise, harmonics and frequency deviation.

키워드

참고문헌

  1. N. B. Bhatt, "Role of Synchrophasor Technology in the Development of a Smarter Transmission Grid," in Proc. 2011 IEEE Power Eng. Soc. Gen. Meet., pp. 1-4.
  2. Y. Zhang, P. Markham, T. Xia, L. Chen, Y. Ye, Z. Wu, Z. Yuan, L. Wang, J. Bank, J. Burgett, R. W. Conners, and Y. Liu, " Wide-Area Frequency Monitoring Network (FNET) Architecture and Applications," IEEE Trans. Smart Grid, vol. 1, no. 2, pp.159-167, Sep. 2010. https://doi.org/10.1109/TSG.2010.2050345
  3. A. G. Phadke , J. S. Thorp, and M. G. Adamiak, "A New Measurement Technique for Tracking Voltage Phasors, Local System Frequency, and Rate of Change of Frequency," IEEE Trans. Power App. Syst.,vol. PAS-102, no.5, pp. 1025-1038, May 1983. https://doi.org/10.1109/TPAS.1983.318043
  4. K. Nakano, Y. Ota, H. Ukai, K. Nakamura, and H. Fujita, "Frequency Detection Method Based on Recursive DFT Algorithm," in Proc, 2002 14th Power System Computation Conf., CD-ROM.
  5. R.O. Burnett, Jr., M. M. Butts, T. W. Cease, V. Centeno, G. Michel, R. J. Murphy, and A. G. Phadke, "Synchronized Phasor Measurements of a Power System Event," IEEE Trans. Power Syst., vol.9, no.3, pp.1643-1650, Aug. 1994. https://doi.org/10.1109/59.336093
  6. J.-Z. Yang and C.-W. Liu, "A precise Calculation of Power System Frequency and Phasor," IEEE Trans. Power Delivery, vol. 15, no. 2, pp. 494-499, Apr. 2000. https://doi.org/10.1109/61.852974
  7. T. Radii, P. M. Ramos, and A. C. Serra, "Frequency Estimation of Power System Signals using a New Spectrum Leakage Correction Algorithm," in Proc. 2008 IEEE Instrumentation and Measurement Technology Conf., pp. 2161-2166, 2008.
  8. T. Xia and Y. Liu, "Single-Phase Angle Measurements in Electric Power Systems," IEEE Trans. Power Syst., vol.25, no. 2, pp. 844-852, May 2010. https://doi.org/10.1109/TPWRS.2009.2031649
  9. C. Candan, "A Method for Fine Resolution Frequency Estimation from Three DFT Samples," IEEE Signal Processing Letters, vol. 18, no. 6, pp. 351-354, Jun. 2011. https://doi.org/10.1109/LSP.2011.2136378
  10. M. D. Kusljevic, J. J. Tomic, and L. D. Jovanovic, "Frequency Estimation of Three-Phase Power System using Weighted-Least Square Algorithm and Adaptive FIR Filtering," IEEE Trans. Instru. Meas., vol. 59, no. 2, pp. 322-329. Feb. 2010. https://doi.org/10.1109/TIM.2009.2023816
  11. A. Routray, A. K. Pradhan, and K. P. Rao, "A Novel Kalman Filter for Frequency Estimation of Distorted Signals in Power Systems," IEEE Trans. Instrum. Meas., vol. 51, no. 3, pp. 469-479, Jun. 2002. https://doi.org/10.1109/TIM.2002.1017717
  12. T. Lotos and J. Rezmer, "Real-Time Determination of Power System Frequency," IEEE Trans. Instrum. Meas., vol. 46, no. 4, pp. 877-881, Aug. 1997. https://doi.org/10.1109/19.650792
  13. A. Sarkar and S. Sengupta, "Bandpass Second-Degree Digital-Integrator-Based Power System Frequency Estimation under Nonsinusoidal Conditions," IEEE Trans. Instrum. Meas., vol. 60, no. 3, pp. 846-853, Mar. 2011. https://doi.org/10.1109/TIM.2009.2036467
  14. A. V. Oppenheim and R. W. Schafer, Digital Signal Processing, Englewood Cliffs, NJ: Prentice-Hall, 1975, pp. 66.
  15. R. L. Scheaffer and J. T. McClave, Probability and Statistics for Engineers 4thEdition, Duxbury Press, 1995, pp. 326.
  16. M. A. Al-Alaoui, "A Class of Second Order Integrators and Lowpass Differenciators," IEEE Trans. Circuits Syst. I, Fundam. Theory Appl., vol. 42, no. 4, pp. 220-223. Apr, 1995. https://doi.org/10.1109/81.382477