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Friday 27 November 2015

Single-Phase to Three-Phase Universal Active Power Filter

      

ABSTRACT:

In this paper, a universal active power filter is proposed for harmonic and reactive power compensation in the single-phase to three-phase systems. The proposed configuration solves a typical problem found in remote (or rural) applications, where only a single-phase grid is available and there is a demand to supply three-phase loads. A suitable control strategy is presented to regulate the load voltage, the power factor, and to minimize the voltage and current harmonics simultaneously. Simulated and experimental results are also presented.

KEYWORDS:

1.      Active power filter
2.       Harmonic distortion compensation
3.      Reactive power compensation
4.       Single-phase to three-phase conversion

SOFTWARE: MATLAB/SIMULINK

 BLOCK DIAGRAM:

       
Fig. 1. Conventional configurations. (a) General scheme of the active power filter. (b) Three-phase active power filter. (c) Single-phase active power filter. (d) Single-phase to three-phase converter.

CIRCUIT DIAGRAM:



                   
Fig. 2. Proposed single-phase to three-phase active power filter.


EXPECTED SIMULATION RESULTS:

         

Fig. 3. Experimental results. (a) Voltage and current of the grid (top), dc-link voltage (middle) and load voltages (bottom). (b) Load current (top) and grid current (bottom).

             



Fig. 4. Experimental results in the time (top) and in the frequency (bottom) domains. (a) Grid current. (b) Load current. (c) Grid voltage. (d) Load voltage.

CONCLUSION:

A universal active power filter for harmonic and reactive power compensation in single-phase to three-phase systems was presented. The model of the system was derived, and comparing this kind of solution (single-phase to three-phase universal power filter) with the conventional solution (ac-dc-ac single-phase to three-phase converters) favors the proposed one, in relation to: switches losses minimization and switches power ratings reduction. A suitable control strategy, including the PWM technique, has been developed as well. The experimental results demonstrate the feasibility of the proposed system.

REFERENCES:

[1] Y. W. Li, F. Blaabjerg, D. Vilathgamuwa, and P. C. Loh, “Design and comparison of high performance stationary-frame controllers for DVR implementation,” IEEE Trans. Power Electron., vol. 22, no. 2, pp. 602–612, Mar. 2007.
[2] E.-H. Kim, J.-M. Kwon, J.-K. Park, and B.-H. Kwon, “Practical control implementation of a three- to single-phase online UPS,” IEEE Trans. Ind. Electron., vol. 55, no. 8, pp. 2933–2942, Aug. 2008.
[3] H. Akagi, “Trends in active power line conditioners,” IEEE Trans. Power Electron., vol. 9, no. 3, pp. 263–268, May 1994.
[4] L. Asiminoaei, F. Blaabjerg, and S. Hansen, “Detection is key—harmonic detection methods for active power filter applications,” IEEE Ind. Appl. Mag., vol. 13, no. 4, pp. 22–33, Jul./Aug. 2007.

[5] B. Singh, K. Al-Haddad, and A. Chandra, “A review of active filters for power quality improvement,” IEEE Trans. Ind. Electron., vol. 46, no. 5, pp. 960–971, Oct. 1999.