A simple digital control algorithm for three phase shunt active filter: simulation and experimentation

Abstract

A novel and simple i_freal control algorithm using digital signal processor (DSP) has been proposed and realized for a three phase shunt active filter (SAF). The simulation and prototype construction of SAF is conducted to compensate the reactive power and harmonics in a distribution system. The major feature of the proposed i_freal algorithm is that it does not require unit vector templates and any transformations for the reference current generation of SAF. This reduces the computational complexity and makes the control flexible and faster. The simulation is conducted in MATLAB/SIMULINK while DSP TMS320LF2407 is employed in the digital implementation of hysteresis current control (HCC) for experimentation. The hardware results correlate with the simulation results in reducing the total harmonic distortion (THD) of the source current and achieving unity power factor.

Keywords

shunt active filter (SAF) / power quality / voltage source inverter (VSI) / digital signal processor (DSP) / total harmonic distortion (THD) / power factor improvement

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Acknowledgements

This work was supported by the Department of Science and Technology (DST), Government of India (Grant No. SR/FTP/ETA-39/2008).

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2014 Higher Education Press and Springer-Verlag Berlin Heidelberg