الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
The issue of power factor improvement and harmonic compensation is well known in electrical engineering. A major area of research in electrical engineering is to make a system where in the current absorbed from the electrical utility is almost purely sinusoidal and is in phase with the voltage. The need for this is the losses incurred at the transmission and also the unnecessary expense to have systems (generators, transformers and transmission lines) supporting higher currents.
The present work is aimed at the study of a shunt Active Power Factor as a solution to these power quality issues (dynamic compensation of reactive and harmonic currents). The control strategies of the active filters are implemented mainly in two steps: estimating of the reference current signal and generating the gating signals for switching devices. To extract the harmonic component (reference current signal) of source current The Direct Testing and Calculating Method (DTCM) is suitable because of its simplicity and low related cost. Further, switching signals to drive the voltage source inverter (VSI) of the Active Power Filter (APF) popular control strategies namely Hysteresis Current Controller is used.
The presented system is implemented using a high speed Digital Signal Processor (DSP1104). The simulated results using developed MATLAB model are presented. The Total harmonic distortion THD improved from 15.71% to 3.28% and the power factor is increased from 0.51 to 0.989. Experimental results to depict the effectiveness of the proposed control method of APF are presented.