A novel time-domain current-detection algorithm for shunt active power filters

A novel current-detection algorithm based on the time-domain approach for three-phase shunt active power filters (APFs) to eliminate harmonics, and/or correct power factor, and/or balance asymmetrical loads is analyzed in this paper. A basic overview and evaluation of the performance of existing current-detection algorithms for active power filters are presented. According to different complicated power quality issues and various compensation purposes, a novel current-detection algorithm is then proposed. Comparing with existing algorithms, this algorithm has shorter response time delay and clearer physical meaning. Different compensating current references can, thus, be accurately and easily obtained by adopting the proposed algorithm. It ensures that the shunt APF can very well achieve different compensation purposes. Moreover, it is very easy to implement this algorithm in a digital signal processor (DSP). Simulation results obtained with MATLAB and testing results on an experimental shunt APF are presented to validate the proposed algorithm.

[1]  B.-R. Lin,et al.  Power electronics inverter control with neural networks , 1993, Proceedings Eighth Annual Applied Power Electronics Conference and Exposition,.

[2]  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.

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

[4]  Jacques L. Willems,et al.  A new interpretation of the Akagi-Nabae power components for nonsinusoidal three-phase situations , 1992 .

[5]  Hirofumi Akagi,et al.  Control and performance of a fully-digital-controlled shunt active filter for installation on a power distribution system , 2002 .

[6]  Hirofumi Akagi,et al.  New trends in active filters for power conditioning , 1996 .

[7]  W. M. Grady,et al.  Survey of active power line conditioning methodologies , 1990 .

[8]  J. R. Vazquez,et al.  Active power filter control using neural network technologies , 2003 .

[9]  A. Girgis,et al.  A digital recursive measurement scheme for online tracking of power system harmonics , 1991 .

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

[11]  V. Blasko,et al.  Operation of a phase locked loop system under distorted utility conditions , 1996, Proceedings of Applied Power Electronics Conference. APEC '96.

[12]  J. Dixon,et al.  A three-phase active power filter operating with fixed switching frequency for reactive power and current harmonic compensation , 1992, Proceedings of the 1992 International Conference on Industrial Electronics, Control, Instrumentation, and Automation.

[13]  S. Liu,et al.  An adaptive Kalman filter for dynamic estimation of harmonic signals , 1998, 8th International Conference on Harmonics and Quality of Power. Proceedings (Cat. No.98EX227).

[14]  M. El-Habrouk,et al.  Design and implementation of a modified Fourier analysis harmonic current computation technique for power active filters using DSPs , 2001 .

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