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OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD
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A three level quasi-two-stage single-phase pfc converter with flexible output voltage and improved conversion efficiency

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A three level quasi-two-stage single-phase pfc converter with flexible output voltage and improved conversion efficiency

  1. 1. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT A THREE-LEVEL QUASI-TWO-STAGE SINGLE-PHASE PFC CONVERTER WITH FLEXIBLE OUTPUT VOLTAGE AND IMPROVED CONVERSION EFFICIENCY By A PROJECT REPORT Submitted to the Department of electronics & communication Engineering in the FACULTY OF ENGINEERING & TECHNOLOGY In partial fulfillment of the requirements for the award of the degree Of MASTER OF TECHNOLOGY IN ELECTRONICS & COMMUNICATION ENGINEERING APRIL 2016
  2. 2. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT CERTIFICATE Certified that this project report titled “A THREE-LEVEL QUASI-TWO-STAGE SINGLE- PHASE PFC CONVERTER WITH FLEXIBLE OUTPUT VOLTAGE AND IMPROVED CONVERSION EFFICIENCY” is the bonafide work of Mr. _____________Who carried out the research under my supervision Certified further, that to the best of my knowledge the work reported herein does not form part of any other project report or dissertation on the basis of which a degree or award was conferred on an earlier occasion on this or any other candidate. Signature of the Guide Signature of the H.O.D Name Name
  3. 3. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT DECLARATION I hereby declare that the project work entitled “A THREE-LEVEL QUASI-TWO-STAGE SINGLE-PHASE PFC CONVERTER WITH FLEXIBLE OUTPUT VOLTAGE AND IMPROVED CONVERSION EFFICIENCY” Submitted to BHARATHIDASAN UNIVERSITY in partial fulfillment of the requirement for the award of the Degree of MASTER OF APPLIED ELECTRONICS is a record of original work done by me the guidance of Prof.A.Vinayagam M.Sc., M.Phil., M.E., to the best of my knowledge, the work reported here is not a part of any other thesis or work on the basis of which a degree or award was conferred on an earlier occasion to me or any other candidate. (Student Name) (Reg.No) Place: Date:
  4. 4. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ACKNOWLEDGEMENT I am extremely glad to present my project “A THREE-LEVEL QUASI-TWO-STAGE SINGLE-PHASE PFC CONVERTER WITH FLEXIBLE OUTPUT VOLTAGE AND IMPROVED CONVERSION EFFICIENCY” which is a part of my curriculum of third semester Master of Science in Computer science. I take this opportunity to express my sincere gratitude to those who helped me in bringing out this project work. I would like to express my Director, Dr. K. ANANDAN, M.A.(Eco.), M.Ed., M.Phil.,(Edn.), PGDCA., CGT., M.A.(Psy.) of who had given me an opportunity to undertake this project. I am highly indebted to Co-Ordinator Prof. Muniappan Department of Physics and thank from my deep heart for her valuable comments I received through my project. I wish to express my deep sense of gratitude to my guide Prof. A.Vinayagam M.Sc., M.Phil., M.E., for her immense help and encouragement for successful completion of this project. I also express my sincere thanks to the all the staff members of Computer science for their kind advice. And last, but not the least, I express my deep gratitude to my parents and friends for their encouragement and support throughout the project.
  5. 5. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ABSTRACT: This paper presents a three-level quasi-two-stage Single-phase power factor correction (pfc) converter that has Flexible output voltage and improved conversion efficiency. The Proposed pfc converter features sinusoidal input current, threelevel Output characteristic, and a wide range of output dc voltages, And it will be very suitable for high-power applications where the Output voltage can be either lower or higher than the peak ac input Voltage, e.g., plug-in hybrid electric vehicle charging systems. Moreover, the involved dc/dc buck conversion stage may only need To process partial input power rather than full scale of the input Power, and therefore the system overall efficiency can be much improved. Through proper control of the buck converter, it is also Possible to mitigate the double-line frequency ripple power that Is inherent in a single-phase ac/dc system, and the resulting load End voltage will be fairly constant. The dynamic response of this Regulation loop is also very fast and the system is therefore insensitive To external disturbances. Both simulation and experimental Results are presented to show the effectiveness of this converter as Well as its efficiency improvement against a conventional two-stage Solution.
  6. 6. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT INTRODUCTION: In order to provide flexible dc output voltages, PFC converters with buck–boost capabilities have been studied in the literatures and they are usually based on buck-boost, flyback, Cuk, and single-ended primary inductance converter (SEPIC) topologies, and can be derived in both nonisolated and isolated versions. A common problem for these topologies is that there is no direct energy transfer path during power conversion and all input power must be processed by active switches and stored by intermediate passive components (either inductors or capacitors) before being supplied to the end loads. This indicates that the components will be working under increased voltage/current stresses, which may consequently lead to decreased power density and conversion efficiency. In order to improve the performance of Cuk and SEPIC-based PFC topologies, their bridgeless variants have recently been proposed with most of them being operated in discontinuous conduction mode (DCM). In this case, the PFC converter can be constructed with less semiconductor switches and the on-state conduction losses can be reduced. The switching losses are reduced as well due to their DCM operation. However, the main power switches in these bridgeless topologies are still under high- voltage stress and the DCM operation also implies that they are only suitable for relatively low- power applications because of the high peak current in the boost inductor.
  7. 7. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT EXISTING SYSTEM: In this approach, there are two independent power stages. The front-end PFC stage is usually a boost or buck/boost (or flyback) converter. The boost converter front-end consists of a boost inductor, boost switch, and rectifier. The PFC controller senses the line voltage waveform and forces the input current to track the line voltage to achieve the unit input power factor. Since the voltage of energy-storage bulk capacitor CB, VB, is loosely regulated, VB is a dc voltage which contains a small second order harmonic. This bus voltage is typically regulated at around 380 Vdc in the entire line input voltage range from 90 Vac to 265 Vac. The high bus voltage VB minimizes the bulk capacitor value for a given hold-up time. In addition, the narrow-range- varying VB improves the efficiency of an optimized dc/dc output stage. The dc/dc output stage is the isolated output stage that is implemented with at least one switch, which is controlled by an independent PWM controller to tightly regulate the output voltage.
  8. 8. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT PROPOSED SYSTEM: To provide a simple but effective solution, this paper presents a high-efficiency single- phase pfc converter that features sinusoidal input current, three-level output characteristic, and flexible output dc voltage. Its attractiveness is that, in case of buck operation mode, the embedded bidirectional dc/dc converter may only need to process partial input power rather than full scale of the input power. Also, the pfc stage exhibits three-level output voltage, and the dv/dt across the switches are reduced, so as the switching losses. An added benefit of this converter is that the fluctuating 100/120 hz harmonic power in the single-phase system can be almost diverted into the dc-link capacitor through proper control design, and the load voltage will be fairly constant and of very fast dynamic response.
  9. 9. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT ADVANTAGES:  High efficiency
  10. 10. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT BLOCK DIAGRAM: 3 level PFC converter Diode bridge rectifier 12 V DC Gate driver circuit PIC controller circuit 5VDC BUFFER circuit Filter Load Single phase AC supply
  11. 11. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT TOOLS AND SOFTWARE USED:  MPLAB – microcontroller programming.  ORCAD – circuit layout.  MATLAB/Simulink – Simulation
  12. 12. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT APPLICATIONS:  Plug-in charging from power grid  Vehicle-to-grid discharge.  Pumping power to drive electric motor.  Regenerative braking  Rear-end traction motor
  13. 13. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT CONCLUSION: In this paper, a three-level quasi-two-stage single-phase PFC converter has been presented. It has flexible output voltage and can be used for single-phase PHEV charger applications, where the battery voltage can be either lower or higher than the peak ac input voltage. The proposed converter features high quality input current, three-level output voltage, and improved conversion efficiency. By designing a fast regulation loop for the buck converter, the inherent fluctuating power issue in single phase systems can also be resolved, and the load voltage will be fairly constant and insensitive to load changes and external disturbances. Moreover, a dynamic gain compensator is implemented in the current control loop and in this case, its control bandwidth can be kept relatively constant irrespective of the dc bus voltage change during two different operation modes. Therefore, the grid current can be well regulated with low THD and high-power factor. Experimental results obtained from a 2-kW laboratory prototype have been presented in the paper, which are in good agreement with the theoretical analysis. The efficiency curves under universal input conditions were recorded from a commercial power analyzer, and it is found that the proposed PFC may have 1% efficiency gain under high-line operation as compared to a conventional cascaded two-stage solution. This efficiency improvement is partly contributed by the reduced switching voltage in the PFC stage, and also partly by the reduced power conversion in the dc/dc buck stage.
  14. 14. OUR OFFICES @CHENNAI/ TRICHY/ KARUR / ERODE / MADURAI / SALEM / COIMBATORE / BANGALORE / HYDRABAD CELL: 9894917187 | 875487 1111 / 2111 / 3111 / 4111 / 5111 / 6111 Visit: www.ecwaytechnologies.com | www.ecwayprojects.com Mail to: ecwaytechnologies@gmail.com ECWAY TECHNOLOGIES IEEE SOFTWARE | EMBEDDED | MECHANICAL | ROBOTICS PROJECTS DEVELOPMENT REFERENCES: [1] Electromagnetic Compatibility (EMC)—Part3: Limits—Section 2: Limits for Harmonic Current Emissions (Equipment Input Current < 16 A Per Phase), IEC Standard 61000-3-2, 1998. [2] L. Huber, Y. Jang, and M. M. Jovanovic, “Performance evaluation of bridgeless PFC boost rectifiers,” IEEE Trans. Power Electron., vol. 23, no. 3, pp. 1381–1390, May 2008. [3] F. Musavi, W. Eberle, and W. G. Dunford, “A high-performance singlephase bridgeless interleaved PFC converter for plug-in hybrid electric vehicle battery chargers,” IEEE Trans. Ind. Appl., vol. 47, no. 4, pp. 1833– 1843, Jul./Aug. 2011. [4] F. Musavi, M. Edington, W. Eberle, and W. G. Dunford, “Evaluation and efficiency comparison of front end AC–DC plug-in hybrid charger topologies,” IEEE Trans. Smart Grid, vol. 3, no. 1, pp. 413–421, Mar. 2012. [5] M. Pahlevaninezhad, P. Das, J. Drobnik, P. K. Jain, and A. Bakhshai, “A ZVS interleaved boostAC/DC converter used in plug-in electric vehicles,” IEEE Trans. Power Electron., vol. 27, no. 8, pp. 3513–3529, Aug. 2012.

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