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International Journal of

Recent Trends in Engineering

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International Journal of Recent Trends in Engineering (IJRTE)

ISSN 1797-9617

Volume 1, Number 4, May 2009

Issue on Electrical & Electronics

Page(s): 85-89

Reduction in Total Harmonic Distortion in a Non-Linear Load with Harmonic Injection Method

Arindam Dutta, Tirtharaj Sen, S. Sengupta

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In this paper a sixth-order harmonic injection PWM concept at a constant switching frequency is established, and a sixth-order harmonic injection technique is developed for the harmonic reduction of a single-switch three-phase boost rectifier. It has been extended to propose a circuit topology for a three-phase active filter using harmonics current injection method. An optimal injection current is achieved in order to obtain an input current of sinusoidal waveforms to meet the IEC 1000-3-2 (A) standard and the output power can be pushed up to 10 kW for the application with a three phase 110 V, 60 Hz input and a 600 V output. The injection principle is graphically explained in current waveforms and mathematically proved. Simulation results have been presented to validate the propositions.

Index Terms

Active filter, Band pass filter, Fixed frequency control, PID controller, PWM rectifier, Total Harmonic Distortion

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