2015 INTERNATIONAL CONFERENCE ON COMPUTATION OF POWER, ENERGY, INFORMATION AND COMMUNlCATION A Novel Power Factor Correction Technique/or a Boost Converter M. Subashini', G. Yazhini2, Dr. M. Ramaswamy3 Research Scholar', PG Student2, Professor3 Dept. of Electrical Engineering Annamalai University Chidambaram, India subashini.2008mail.coml, yazhiniaseeemail.com2, aupowerstamail.com3 tt- The paper evolves a mechanism for improving the input power factor of an AC-DC-DC conversion system. It involves the process of shaping the input current wave to phase align with the input supply through a process of error compensation. The methodology includes cohesive formulation to arrive at nearly unity power factor and enjoy the etiquettes of output voltage regulation. The theory assuages to subscribe the beneits for the entire range of operating loads. It eliminates the use of passive components and fortiies the principles of pulse width modulation (PWM) for realizing the change in duty cycle. The MA TLAB based simulation results arbitrate the viability of the proposed approach and exhibit its suitability for use in real world applications. Keywords- ac-dc conveter; power Jactor;  voltage regulation I. INTRODUCTION The effective utilization of available energy appears to be crucial in the scenario of depletion of fossil uels. The major portion of the generated electricity serves for industrial applications involving various classes of drives and domestic applications which include several electronic types of equipment. The complexities of modern power systems arise rom the quality of current absorbed by the nonlinear loads which constitute the foremost sources of harmonics. Power factor of a load relates the index of the amount of distortion of current waveform or in other words, the amount of useul power transferred to the load. A high harmonic line current may root to electromagnetic interference with other systems connected to that grid. On the other hand, a power electronic converter continues to be an essential interface for matching the load requirements with the existing power supply. Most power conversion function be-hives an ac-dc converter consisting of a diode bridge and a ilter capacitor or inductor or a combination of both. The presence of reactive components and nonlinear switches in such a scheme distorts the input current to a large extent. It is therefore necessary to put in place, a power factor correction methodology to counteract the distortion in the line current and to operate the load at a power factor nearer to unity. The simplest means of power factor corection owes to design ilters that passes only line requency curents. It requires however bulky and expensive large curent capacitors or inductors above a certain power level. Conventional active power factor correction technique requires two stages for the power conversion [1]-[3], where the individual control blocks for the two stages increased the complexity of such design. The two stage processing of power reduce the eiciency of power conversion and increase the cost of equipments needed for the development of single stage power factor correction [4]-[7]. Single stage power factor correction techniques proposed in [8] have been tailored with coupled inductors and designed to operate in discontinuous conduction mode for obtaining high power factor. Two bulk storage capacitors have been used in [9] to a combination of boost and forward circuit to improve the power factor. These methods have been oriented for a very small range of control bandwidth due to the use passive components for power factor correction. Different topologies of DC-DC converter that integrates the power factor correction stage and regulation stage as a single power stage have been used in [9]-[11]. Interleaving techniques have been suggested by [12] [15] to improve power factor with reduced stresses in the devices. Carrier modiication technique has been adopted in [16]-[20] to accomplish the control interest. Modiied topological structure or interleaving or modiied carrier techniques have been found to need additional components which again complicate the system and increases the size of the converter for low power output level and low cost applications. The focus spreads to propose a novel methodology for corecting the power factor of a full bridge diode rectiier fed boost converter that features power factor closer to unity. It incites to regulate the output voltage and derive low ripple factor which tn out to be the inherent characteristic of a switched mode power supply. The implementation of the process requires less number of passive components and attempts to make the converter compact and economically viable. II. BOOST POWER FACTOR CORRECTION CONVERTER The boost DC-DC converter provides higher ouput voltage level which discriminate it rom other conventional topologies of DC-DC converters. The ground 978-1-4673-6524-6/15/$ 31. 00 © 2015 IEEE 0464