Quality problems encountered in power systems usually originate from reactive and harmonic current components drawn by non-linear loads. Therefore the extraction of reactive and harmonic current components from distorted current waveform is a vital issue in the works aiming to monitor and eliminate power quality problems. In this study, a new method that provides the extraction of active, reactive and harmonic current components from distorted current is presented. The method has been based on the differential equation of the single-phase source-load system. The proposed method performs computations by using a sliding sampling window that has a width of half of the fundamental cycle. Immunity to noise, being less affected from frequency deviations and being not influenced from dc component that may exist in load currents are some other advantages of the proposed method. The method has been analysed and compared to two commonly used methods, namely discrete Fourier transform (DFT) and dq, by using a series of simulations that have been executed in Matlab/Simulink environment. Simulation results demonstrated the effectiveness of the proposed method.

References

1. 1)
  - G.W. Chang . A new approach for optimal shunt active power filter control considering alternative performance indices. IEEE Trans. Power Deliv. , 1 , 406 - 413
2. 2)
  - 1. Maza-Ortega, J.M., Rosendo-Macias, J.A., Gomez-Exposito, A., et al: ‘Reference current computation for active power filters by running DFT techniques’, IEEE Trans. Power Deliv., 2010, 25, (3), pp. 1986–1995 (doi: 10.1109/TPWRD.2010.2048764).
3. 3)
  - 9. Herrera, R.S., Salmeron, P., Hyosung, K.: ‘Instantaneous reactive power theory applied to active power filter compensation: different approaches, assessment, and experimental results’, IEEE Trans. Ind. Electron., 2008, 55, (1), pp. 184–196 (doi: 10.1109/TIE.2007.905959).
4. 4)
  - 44. Wang, Y.F., Li, Y.W.: ‘A grid fundamental and harmonic component detection method for single-phase systems’, IEEE Trans. Power Electron., 2013, 28, (5), pp. 2204–2213 (doi: 10.1109/TPEL.2012.2214445).
5. 5)
  - A. Bhattacharya , C. Chakraborty , S. Bhattacharya . Shunt compensation. IEEE Trans. Ind. Electron. Mag. , 3 , 38 - 49
6. 6)
  - F.D. Freijedo , J. Doval-Gandoy , O. Lopez , P. Fernandez-Comesana , C. Martinez-Penalver . A signal-processing adaptive algorithm for selective current harmonic cancellation in active power filters. IEEE Trans. Ind. Electron. , 8 , 2829 - 2840
7. 7)
  - 17. Moreno, V.M., Liserre, M., Pigazo, A., et al: ‘A comparative analysis of real-time algorithms for power signal decomposition in multiple synchronous reference frames’, IEEE Trans. Power Electron., 2007, 22, (4), pp. 1280–128 (doi: 10.1109/TPEL.2007.900484).
8. 8)
  - 19. Golestan, S., Monfared, M., Guerrero, J.M.: ‘A novel method for extraction of the reference compensating current for single-phase shunt active power filters’. Int. Conf. on Electrical Engineering and Informatics (ICEEI), July 2011, pp. 1–5.
9. 9)
  - 16. Karuppanan, P., Mahapatra, K.K.: ‘PLL with fuzzy logic controller based shunt active power filter for harmonic and reactive power compensation’. India Int. Conf. on Power Electronics (IICPE), January 2011, pp. 1–6.
10. 10)
  - 18. Komrska, T., Zak, J., Peroutka, Z.: ‘Time-based and frequency-based fundamental grid current estimation for single-phase active power filters’. IEEE Int. Symp. on Industrial Electronics (ISIE), May 2013, pp. 1–7.
11. 11)
  - V. Khadkikar , A. Chandra , B. Singh . Generalised single-phase p–q theory for active power filtering: simulation and DSP-based experimental investigation. IET Power Electron. , 1 , 67 - 78
12. 12)
  - Z. Shu , Y. Guo , J. Lian . Steady-state and dynamic study of active power filter with efficient FPGA-based control algorithm. IEEE Trans. Ind. Electron. , 4 , 1527 - 1536
13. 13)
  - A. Bhattacharya , C. Chakraborty . A shunt active power filter with enhanced performance using ANN-based predictive and adaptive controllers. IEEE Trans. Ind. Electron. , 2 , 421 - 428
14. 14)
  - 8. Carvalho, T.C.O., Duque, C.A., Silveira, P.M., et al: ‘Review of signal processing techniques for time-varying harmonic decomposition’, Power and Energy Society General Meeting, July 2012,vol. 1, pp. 22–26.
15. 15)
  - 12. Singh, B., Verma, V.: ‘Selective compensation of power-quality problems through active power filter by current decomposition’, IEEE Trans. Power Deliv., 2008, 23, (2), pp. 792–799 (doi: 10.1109/TPWRD.2007.911108).
16. 16)
  - K.R. Uyyuru , M.K. Mishra , A. Ghosh . An optimization-based algorithm for shunt active filter under distorted supply voltages. IEEE Trans. Power Electron. , 5 , 1223 - 1232
17. 17)
  - 13. Moreno, V., Pigazo, A., Diego, R.I.: ‘Reference estimation technique for active power filters using a digital Kalman algorithm’. Tenth Int. Conf. on Harmonics and Quality of Power, October 2002, vol. 2, pp. 490–494.
18. 18)
  - 15. Nishida, K., Rukonuzzaman, M., Nakaoka, M.: ‘Digital control three-phase shunt active power filter with a new harmonic-current-extraction process’, IEE Gener. Transm. Distrib., 2005, 152, (4), pp. 529–538 (doi: 10.1049/ip-gtd:20040756).
19. 19)
  - 7. Yazdani, D., Bakhshai, A., Joos, G., et al: ‘A real-time three-phase selective-harmonic-extraction approach for grid-connected converters’, IEEE Trans. Ind. Electron., 2009, 56, (10), pp. 4097–4106 (doi: 10.1109/TIE.2009.2024658).

New extraction method for active, reactive and individual harmonic components from distorted current signal

References

Related content