Adaline controlled 3-phase 3-wire shunt active power filter with enhanced performance using the capacitor voltage feedback

This paper presents a fast technique to generate the current reference to compensate for the harmonics and reactive power in a shunt type active power filter (APF). A voltage source inverter (VSI) is operated in the current controlled mode for this purpose. For fast generation of the reference current in the APF, the dc link voltage of the VSI is always sensed and an initial estimate is derived through an ANN based PI controller. It has been observed that this method works fine for balanced load. Unbalance in load and also uncertainty/mismatch in the filter parameters, deteriorate the system performance. To overcome this drawback, an Adaline based technique is incorporated. Weights in Adaline are tuned to minimize the Total Harmonic Distortion (THD) of the source current. Extensive simulations confirm the validity of the proposed scheme for all kinds of load (balanced and unbalanced) for a three phase three wire.

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

[2]  B. Noble,et al.  On certain integrals of Lipschitz-Hankel type involving products of bessel functions , 1955, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[3]  Yaow-Ming Chen,et al.  Active power line conditioner with a neural network control , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

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

[5]  Kumar,et al.  Neural Networks a Classroom Approach , 2004 .

[6]  Bhim Singh,et al.  Neural Network-Based Selective Compensation of Current Quality Problems in Distribution System , 2007, IEEE Transactions on Industrial Electronics.

[7]  Hirofumi Akagi,et al.  The unified power quality conditioner: the integration of series- and shunt-active filters , 1998 .

[8]  Subhashish Bhattacharya,et al.  Active filter system implementation , 1998 .

[9]  Loi Lei Lai,et al.  Real-time frequency and harmonic evaluation using artificial neural networks , 1999 .

[10]  Katsumi Nishida,et al.  DSP control shunt APF with harmonic extraction by adaptive neural network , 2003, 38th IAS Annual Meeting on Conference Record of the Industry Applications Conference, 2003..

[11]  Patrice Wira,et al.  A Unified Artificial Neural Network Architecture for Active Power Filters , 2007, IEEE Transactions on Industrial Electronics.

[12]  B. Widrow,et al.  The complex LMS algorithm , 1975, Proceedings of the IEEE.

[13]  V. Soares,et al.  Active power filter control circuit based on the instantaneous active and reactive current i/sub d/-i/sub q/ method , 1997, PESC97. Record 28th Annual IEEE Power Electronics Specialists Conference. Formerly Power Conditioning Specialists Conference 1970-71. Power Processing and Electronic Specialists Conference 1972.