An Improved Adaptive Detection Method for Power Quality Improvement

A new adaptive harmonic selective detection method is proposed in this paper. This adaptive method has better convergence properties compared to previous adaptive or neuron detection methods. The adaptive gains of this method can be relatively large to obtain faster convergence. The stability of the proposed method is guaranteed and its properties are analyzed when compared to its predecessors. This proposed adaptive method is simple and effective in extracting fundamental and harmonic current information from nonlinear load currents. The extracted fundamental or harmonic currents therefore can be used as the reference signals for power quality improvement, harmonic selective cancellation or reactive power compensation. The method is also phase-independent and can thus be easily applied to single- or three-phase unbalanced systems. Simulation and experimental results verify the good performance of this improved adaptive detection method. Moreover, two application cases are built and tested to demonstrate its effectiveness in harmonic selective cancellation and reactive power compensation.

[1]  Subhashish Bhattacharya,et al.  Control of square-wave inverters in high power hybrid active filter systems , 1996 .

[2]  D. J. Adams,et al.  Harmonic and reactive power compensation based on the generalized instantaneous reactive power theory for three-phase four-wire systems , 1998 .

[3]  Po-Tai Cheng,et al.  Experimental verification of dominant harmonic active filter (DHAF) for high power applications , 1998, Conference Record of 1998 IEEE Industry Applications Conference. Thirty-Third IAS Annual Meeting (Cat. No.98CH36242).

[4]  Kamal Al-Haddad,et al.  A review of active filters for power quality improvement , 1999, IEEE Trans. Ind. Electron..

[5]  M.R. Iravani,et al.  A method for synchronization of power electronic converters in polluted and variable-frequency environments , 2004, IEEE Transactions on Power Systems.

[6]  J.W. Dixon,et al.  A simple frequency-independent method for calculating the reactive and harmonic current in a nonlinear load , 1996, IEEE Trans. Ind. Electron..

[7]  Marian P. Kazmierkowski,et al.  Current control techniques for three-phase voltage-source PWM converters: a survey , 1998, IEEE Trans. Ind. Electron..

[8]  Paolo Mattavelli.  A closed-loop selective harmonic compensation for active filters , 2001 .

[9]  J. Svensson.  Synchronisation methods for grid-connected voltage source converters , 2001 .

[10]  D. Cartes,et al.  Initial results in Prony analysis for harmonic selective active filters , 2006, 2006 IEEE Power Engineering Society General Meeting.

[11]  Qiang Zhang,et al.  Three-Phase Harmonic Selective Active Filter Using Multiple Adaptive Feed Forward Cancellation Method , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[12]  Po-Tai Cheng,et al.  Line harmonics reduction in high-power systems using square-wave inverters-based dominant harmonic active filter , 1999 .

[13]  J. Thorp,et al.  Real Time Voltage-Phasor Measurements for Static State Estimation , 1985, IEEE Power Engineering Review.

[14]  H. Akagi,et al.  Analysis and design of an active power filter using quad-series voltage source PWM converters , 1988, Conference Record of the 1988 IEEE Industry Applications Society Annual Meeting.

[15]  H. Akagi,et al.  A practical approach to harmonic compensation in power systems-series connection of passive and active filters , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[16]  E. Perez,et al.  An adaptive method for determining the reference compensating current in single-phase shunt active power filters , 2003 .

[17]  Fang Zheng Peng,et al.  Reactive power and harmonic compensation based on the generalized instantaneous reactive power theory for three-phase power systems , 1996 .

[18]  P.L. So,et al.  Improvement of power quality using adaptive shunt active filter , 2005, IEEE Transactions on Power Delivery.

[19]  M.R. Iravani,et al.  A signal Processing system for extraction of harmonics and reactive current of single-phase systems , 2004, IEEE Transactions on Power Delivery.

[20]  Anuradha M. Annaswamy,et al.  Robust Adaptive Control , 1984, 1984 American Control Conference.

[21]  Houshang Karimi,et al.  An adaptive filter for synchronous extraction of harmonics and distortions , 2003 .

[22]  Gil D. Marques,et al.  An instantaneous active and reactive current component method for active filters , 2000 .

[23]  M. R. Iravani,et al.  A Nonlinear Adaptive Filter for Online Signal Analysis in Power Systems: Applications , 2002, IEEE Power Engineering Review.

[24]  Luo Shiguo,et al.  An adaptive detecting method for harmonic and reactive currents , 1993, Proceedings of TENCON '93. IEEE Region 10 International Conference on Computers, Communications and Automation.

[25]  G. T. Heydt.  A New Method for the Calculation of Subtransmission and Distribution System Transients Based on the FFT , 1989, IEEE Power Engineering Review.

[26]  Po-Tai Cheng,et al.  Operations of the dominant harmonic active filter (DHAF) under realistic utility conditions , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[27]  M. M. A. Salama,et al.  Modular Active Power-Line Conditioner , 2001, IEEE Power Engineering Review.

[28]  H. Akagi,et al.  Compensation characteristics of the combined system of shunt passive and series active filters , 1989, Conference Record of the IEEE Industry Applications Society Annual Meeting,.

[29]  Hirofumi Akagi,et al.  Instantaneous Reactive Power Compensators Comprising Switching Devices without Energy Storage Components , 1984, IEEE Transactions on Industry Applications.

[30]  H. Fujita,et al.  Implementation and performance of cooperative control of shunt active filters for harmonic damping throughout a power distribution system , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[31]  Ned Mohan,et al.  Filtering of harmonic currents and damping of resonances in power systems with a hybrid-active filter , 1995, Proceedings of 1995 IEEE Applied Power Electronics Conference and Exposition - APEC'95.