Generalised single-phase p-q theory for active power filtering: simulation and DSP-based experimental investigation

Generalised single-phase p-q theory for active power filtering: simulation and DSP-based experimental investigation

For access to this article, please select a purchase option:

Buy article PDF
(plus tax if applicable)
Buy Knowledge Pack
10 articles for £75.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Your details
Why are you recommending this title?
Select reason:
IET Power Electronics — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The single-phase p-q theory for the purpose of active power filtering in the case of single-phase loads is dealt with here. A simple modification is proposed to develop a generalised single-phase p-q theory that can be utilised under the condition of distorted utility voltage. A systematic study is presented by realising both direct and indirect current control techniques. The simulation as well as the digital signal processor (DSP) (DS1104 of dSPACE) based experimental results are discussed. The developed single-phase shunt active power filter (APF) prototype is tested under different operating conditions with different loads to evaluate the full capabilities of the proposed generalised theory for practical uses. The shunt APF reduces the source current total harmonics distortion (THD) from 27.2 to 3.4% under a distorted supply voltage with a THD of 16.2%.


    1. 1)
      • A review of active power filters for power quality improvement
    2. 2)
    3. 3)
      • Kunjumuhammed, L.P., Mishra, M.K.: `Comparison of single phase shunt active power filter algorithms', Proc. Annu. Conf. IEEE Power India, 2006, p. 8
    4. 4)
      • Ruomei, L.: `A high power active filter for harmonic compensation in an electric locomotive', Proc. Conf. IEEE Pow. Sys. Tech. (PowerCon'02), 2002, 2, p. 1059–1063
    5. 5)
      • Dobrucky, B., Hyosung, K., Racek, V., Roch, M., Pokorny, M.: `Single-phase power active filter and compensator using instantaneous reactive power method', Proc. Conf. IEEE Pow. Conv. (PCC'02), 2002, 1, p. 167–171
    6. 6)
      • Lopez, M., Moran, L., Dixon, J.: `A three-phase active power filter implemented with multiples single-phase inverter modules in series', Proc. Annu. Conf. IEEE Ind. Elec. (ISIE'00), 2000, 1, p. 96–101
    7. 7)
      • Chen, C.L., Lin, C.E., Huang, C.L.: `An active filter for unbalanced three-phase system using synchronous detection method', Proc. Annu. Conf. IEEE Power Electron. Spc. (PESC'94), June 1994, 2, p. 1451–1455
    8. 8)
    9. 9)
    10. 10)
      • Machmoum, M., Bruyant, N., Siala, S., Le Doeuff, R.: `A practical approach to harmonic current compensation by a single-phase active filter', Proc. Conf. Eup. Pow. Elect. (EPE'95), 1995, p. 2.505–2.511
    11. 11)
      • Instantaneous reactive power compensators comprising switching devices without energy storage components
    12. 12)
      • Liu, J., Yang, J., Wang, Z.: `A new approach for single-phase harmonic current detecting and its application in a hybrid active power filter', Proc. Annu. Conf. IEEE Indust. Electron. Soc. (IECON'99), 1999, 2, p. 849–854
    13. 13)
      • Haque, T.M.: `Single-phase pq theory for active filters', Proc. Annu. Conf. IEEE Compu. Communi. Contr. Power Engg. (TENCON'02), 2002, 3, p. 1941–1944
    14. 14)
      • Correa, J.M., Farret, F.A., Simoes, M.G.: `Application of a modified single-phase p-q theory in the control of shunt and series active filters in a 400 Hz microgrid', Proc. Annu. Conf. IEEE Power Electron Spec. (PESC'05), 2005, p. 2585–2591
    15. 15)
      • Wu, T.F., Shen, C.L., Chang, C.H., Chiu, J.Y.: `A 1ϕ3W grid-connection PV power inverter with partial active power filter', Proc. Annu. Conf. IEEE Power Electron Spec. (PESC'02), 2000, 3, p. 1512–1517
    16. 16)
      • Tan, P.C., Salam, Z.: `A new single-phase two-wire hybrid active power filter using extension p-q theorem for photovoltaic application', Proc. Conf. IEEE Power Ener. (PECon'04), 2004, p. 126–131
    17. 17)
      • Singh, B.N., Chandra, A., Al-Haddad, K.: `Performance comparison of two current control techniques applied to an active filter', Proc. Conf. IEEE Harm. Qual Power, 1998, 1, p. 133–138
    18. 18)
    19. 19)
      • Peng, F.Z., Adams, D.J.: `Harmonic sources and filtering approaches-series/parallel, active/passive, and their combined power filters', Proc. Annu. Conf. IEEE Indust. Appl., 1999, 1, p. 448–455

Related content

This is a required field
Please enter a valid email address