Abstract

In the present study we used Matlab/Simulink for the simulation of the boost type power factor correctiontopologywhichwe modeled simply for the current stage. Power factor is the ratio of real power (kilo Watt) which is the actual energythatthedevice uses, to apparent power (kilo Volt Ampere) which is what the network has to supply. Power Factor is a measure of howwellyour system uses what is put out by the grid. A system with a poor power factor draws more apparent power than real power. Alowpower factor is considered to be less than 0.9. Also, what we see is that certain types of loads like inductive and capacitiveloadswhich bring down this factor.In many applications which include Interruptible Power Supplies (UPS) and inverterstheperformance of (Alternating Current-Direct Current) and Direct Current-Direct Current power converters is a functionof powerfactor. We see that in the case of (Alternating Current-Direct Current) conversion rectifiers produce high harmonics, lowpowerfactor, poor efficiency, and large inductors and filters. It is the improvement in performance and efficiency of converterswhichisachieved through improved power factor and reduced line current distortion which we see is the issue at hand. To meet thisneedtypically some form of PFC circuit is included for input phase current shaping. In this paper the traditional AC-DC converter which we controlled via the MOSFET firing angle to in turn control theoutputvoltage and current for a capacitive load. These converters do not do well with power factor. To improve the power factor, wedeveloped PFC converters which we made to achieve a THD of around 94% via the use of PWM techniques. We did thesimulationin the MATLAB Simulink environment .Keywords: Power Factor Correction (PFC), Buck‑Boost, Pulse‑Width Modulation(PWM)control, Particle Swarm Optimization (PSO) tuning, PID controller