Power Factor Correction Using Bridgeless Boost Topology

Power quality is becoming a major concern for many electrical users. The high power non linear loads (such as adjustable speed drives, arc furnace, static power converter etc) and low power loads (such as computer, fax machine etc) produce voltage fluctuations, harmonic currents and an inequality in network system which results into low power factor operation of the power system. The devices commonly used in industrial, commercial and residential applications need to go through rectification for their proper functioning and operation. Due to the increasing demand of these devices, the line current harmonics create a major problem by degrading the power factor of the system thus affecting the performance of the devices. Hence there is a need to reduce the input line current harmonics so as to improve the power factor of the system. This has led to designing of Power Factor Correction circuits. Power Factor Correction (PFC) involves two techniques, Active PFC and Passive PFC. An active power factor circuit using Boost Converter is used for improving the power factor. This thesis work analyzes the procedural approach and benefits of applying Bridgeless Boost Topology for improving the power factor over Boost Converter Topology. A traditional design methodology Boost Converter Topology is initially analyzed and compared with the Bridgeless Boost topology and the overall Power Factor (PF) can be improved to the expectation. Method of re-shaping the input current waveform to be similar pattern as the sinusoidal input voltage is done by the Boost converter and the related controls that act as a Power Factor Correction (PFC) circuit. Higher efficiency can be achieved by using the Bridgeless Boost Topology. In this paper simulation of Boost Converter topology and Bridgeless PFC boost Converter is presented. Performance comparisons between the conventional PFC boost Converter and the Bridgeless PFC Boost Converter is done

Development of an AC-DC buck power factor correction

Generally all devise used in industrial, commercial and residential applications need to undergo rectification for their proper functioning and operation. It connected to the non-linear loads which results in production of non-sinusoidal line current. Due to the increasing demand of these devices, the line current non-sinusoidal pose a major problem by degrading the power factor of the system thus affecting the performance of the devices. Hence there is a need to reduce the line current non-sinusoidal so as to improve the power factor of the system and led to designing of Power Factor Correction circuits. Power Factor Correction (PFC) involves two techniques, Active PFC and Passive PFC. In our project work we have designed an active power factor circuit using Buck Converter for improving the power factor. The advantage of using Buck Converter in power factor correction circuits is that better line regulation is obtained with appreciable power factor. Simulation and experimental are conducted to validate the theoretical analysis. The results show that the power factor can be improved

Development of an ac-dc buck-boost power factor correction

Increasing the power quality is a subject which has received increased attention in recent years. Power factor correction (PFC) is one of the power quality points which is receiving greater attention as evidenced by the number of manufacturers which are manufacturing various types of integrated circuits for power factor correction. Nonetheless, Power Factor Correction with AC-DC Buck Boost Converter is still infrequently being used. This project proposes of a development of AC-DC Buck Boost Power Factor Correction to improve the power factor to the near unity (0.99). For this project, the two objectives that have been identified are to develop the design of the AC�DC Buck-Boost Power Factor Correction model and to implement the simulation of AC�DC Buck-Boost Power Factor Correction. The Matlab Simulink software is used to do the design of the circuit experimented; Circuit without any PFC circuit, Circuit with open-loop PFC circuit and Circuit with closed-loop PFC circuit.. The results conclude that there is improvement of the power factor using the proposed AC-DC Buck Boost Power Factor Correction

Development of an AC-DC boost power factor correction

With rapid development in power semiconductor devices, the usage of power electronic systems has expanded to new and wide application range that include residential, commercial, aerospace and many others. Power electronic interfaces such as switch mode power supplies have proved to be superior over traditional linear power supplies. However, their non-linear behavior puts a question mark on their high efficiency. The current drawn by the switch mode power supplies from the line is distorted resulting in a high Total Harmonic Distortion and low Power Factor. Power Factor, the ratio between the real or average power and the apparent power forms a very essential parameter in power system. It is indicative of how effectively the real power of the system has been utilized. With the stringent requirements of power quality, power factor correction has been an active research topic in power electronics, and significant efforts have been made on the developments of the power factor correction converters. This project aims to develop a circuit for power factor correction using active filtering approach by implementing boost converters arranged in parallel. It shall be based on an optimized power sharing strategy to improve the current quality and at the same time reduce the switching losses. The simulation result shows that the power factor was improved when the power factor corrector circuit added to the inverter and the power factor corrector circuit switching with proportional-integral-derivative controller shows better power factor then using pulse width modulation switching mode

Development of power factor correction using boost converter circuit

This project describes on developed of a system that can control current by using Texas Instruments microcontroller with Code Compressor Studio software. The type of controller used is C2000 Microcontroller (Texas Instrument TMS320F28) for current feedback loop application. The connection between PC as the software for Code Compressor Studio software (CCS), Pulse Width Modulation (PWM), Texas Instrument (interface), gate driver, power factor correction circuit in boost circuit topology and rectifier circuit, load and sensor are the main parts in this project. Texas Instrument works as the interface communication with MATLAB SIMULINK 2015a to the power factor correction system. In order to control the triggering of the MOSFETs in the Power Factor Correction (PFC), the Pulse Width Modulation (PWM) is needed from MATLAB SIMULINK that has been applied in this project. The main objective in this project is to control the current output by using microcontroller and to detect the load current in order to have the closed loop feedback. By designing the rectifier and the boost circuit in MATLAB simulation is the first part of the project, which gives Total Harmonic Distortion in opened loop 23.86 % and meanwhile for about 17.66 % in closed based. At the same time the hardware part has also been assemble. The current controller loop has been designed according to mathematical equations which is achieved the results of efficiency and stability in output voltage and the input current of the source. With 22 V AC voltage input the obtained output of the rectifier circuit voltage is at 21.2 V DC voltage with 0.139 mA current. Meanwhile the boost circuit boosted the output voltage to 31.6 V DC voltage with 1.05 mA amount of current. The project has been accomplished and achieved all the objectives successfully

LC compensators for power factor correction of nonlinear loads

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. Copyright @ 2004 IEEEA method is presented for finding the optimum fixed LC compensator for power factor correction of nonlinear loads where both source voltage and load current harmonics are present. The LC combination is selected because pure capacitive capacitors alone would not sufficiently correct the power factor. Optimization minimizes the transmission loss, maximizes the power factor, and maximizes the efficiency. The performance of the obtained compensator is discussed by means of numerical examples

Cost-effective applications of power factor correction for nonlinear loads

This material is posted here with permission of the IEEE. Such permission of the IEEE does not in any way imply IEEE endorsement of any of Brunel University's products or services. Internal or personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution must be obtained from the IEEE by writing to [email protected]. Copyright @ 2005 IEEEThe objective of this paper is to propose a new approach for designing passive LC compensators by using the penalty function method as an optimization tool. The performance of the cost-effective passive LC compensator for a constant load depends on the appropriate inductor and capacitor selection. Several design methods are reviewed and a novel design methodology is proposed in this paper. By using the proposed method, the designer can quickly find appropriate parameter values to meet the desired circuit performance. Simulated results show that an appropriate combination of the inductor and capacitor selected by the proposed method can meet the desired power-quality requirement. Different cases of design examples are shown in this paper to verify the performance of the proposed design methodology

Smart Automatic Power Factor Correction Device

This document will discuss on research and theory of the chosen topic for Final Year Project, which is Smart Automatic Power Factor Correction Device (PFCD). The objective of this project is to conduct study on the theory of power factor correction, application in industry and residential, simulate the circuit of power factor with different load, experimentally test the power factor concept and further improve it to a smart automatic power factor correction device

Modern tools for power-factor correction.

Bakalářská práce se zaměřuje na základní pojmy kompenzace a jejich použití v průmyslu jak pro nízké, tak i pro vysoké napětí. Dále je teoreticky charakterizován rozbor průmyslových a distribučních sítí. V prací jsou uvedeny nejmodernější typy kompenzačních zařízení. Teoretická část popisuje a vysvětluje jednotlivé druhy kompenzace a účel použití jednotlivých kompenzací. Také jsou zde vysvětleny druhy řízení. V závěru práce je vzorový výpočet zaměřený na hrazenou kompenzaci pro centrální kompenzaci.Bachelor thesis focuses on basic concepts of compensation and their usage in industry for both low and high voltage. Then we characterized theoretical analysis of industrial and distribution networks. There are stated latest types of compensation devices. Theoretical part explains various types of compansation and their purpose for compensation. Various types of control are explained next. There is sample calculation focused on protected compensation for central compensation in the end of thesis.410 - Katedra elektroenergetikydobř