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A nonisolated three port dc–dc converter and three-domain control method for pv-battery power systems

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A nonisolated three port dc–dc converter and three-domain control method for pv-battery power systems

  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 NON ISOLATED THREE-PORT DC–DC CONVERTER AND THREE-DOMAIN CONTROL METHOD FOR PV-BATTERY POWER SYSTEMS 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 NON ISOLATED THREE-PORT DC–DC CONVERTER AND THREE-DOMAIN CONTROL METHOD FOR PV-BATTERY POWER SYSTEMS” 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 NON ISOLATED THREE-PORT DC–DC CONVERTER AND THREE-DOMAIN CONTROL METHOD FOR PV-BATTERY POWER SYSTEMS” 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 NON ISOLATED THREE-PORT DC–DC CONVERTER AND THREE-DOMAIN CONTROL METHOD FOR PV-BATTERY POWER SYSTEMS” 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: A new nonisolated multiinput multioutput dc–dc boost converter is proposed in this paper. This converter is applicable in hybridizing alternative energy sources in electric vehicles. In fact, by hybridization of energy sources, advantages of different sources are achievable. In this converter, the loads power can be flexibly distributed between input sources. Also, charging or discharging of energy storages by other input sources can be controlled properly. The proposed converter has several outputs with different voltage levels which makes it suitable for interfacing to multilevel inverters. Using of a multilevel inverter leads to reduction of voltage harmonics which, consequently, reduces torque ripple of electric motor in electric vehicles. Also, electric vehicles which using dc motor have at least two different dc voltage levels, one for ventilation system and cabin lightening and other for supplying electric motor. The proposed converter has just one inductor. Depending on charging and discharging states of the energy storage system (ESS), two different power operation modes are defined for the converter. In order to design the converter control system, small-signal model for each operation mode is extracted. The validity of the proposed converter and its control performance are verified by simulation and experimental results for different operation conditions.
  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: Except for direct energy transfer power systems, a pulse-width modulation switching dc/dc converter controlled by the maximum power point tracking (MPPT) algorithm has been used to extract the maximum power of photovoltaic (PV) in PV-battery power systems. Recently, three-port converters, interfacing one PV port, one bidirectional battery port, and one load port of a PV-battery dc power system, are a good candidate for such a renewable power system, particularly for a spacecraft power supply system. Because of the high power density and high efficiency merit of the three-port converters, it has increasingly attracted research interest toward various applications In general rules were carried out to derive nonisolated and isolated multiple-input converters from the single-input versions, which are adopted to identify the feasible input cell that complies with some assumptions and conditions. the simple and costeffective approach based on a buck or a buck–boost topology was proposed. However, these converters have no power flow path for charging when a battery is connected, which are not fit for a PV-battery dc power system. The converter proposed in can interface two unidirectional input power ports and a bidirectional port for a storage element. Only two power inductors have been utilized; however, the number of metal–oxide– semiconductor field-effect transistor (MOSFET) and power diode reaches eight.
  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 A systematic approach is given in to generate nonisolated three-port converters; these converters feature high integration and high efficiency due to one-stage conversion. However, the inherent right-half-plane zero (RHPZ) of traditional boost deteriorates both the dynamic performance and ac characteristic of the converter, and the current of the port is discontinuous. In a multiple-port dc/dc converter for regulated satellite power bus has been proposed. The converter has high power density by sharing common power devices and merits a good modularity property by using conductance current control. However, the battery port voltage of the converter must be higher than the bus voltage, which will make the battery design difficult and unsafe. Moreover, it is a two-stage power conversion from PV to bus, deteriorating the whole converter efficiency. Furthermore, in order to make the PV voltage close to the battery voltage for higher efficiency, the PV voltage design will be difficult, since the voltage of the battery will be changed when charging and discharging. In, a threeport converter with high-voltage gain has been proposed, and the port current of the converter in the low-voltage side can be continuous. However, semiconductor power devices reach seven, which will complicate the whole system design.
  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 EXISTING SYSTEM: The dc–dc full-bridge converter uses resonant techniques in which resonant elements such as capacitors and inductors are used to shape the current through a converter switch so that it can fall to zero to allow the switch to turn off with ZCS. The resonant elements, however, are large and bulky, which makes their use impractical for many applications, and the converter is operated with variable frequency control, which makes the design of the converter more difficult and also increases the size of the converter as it must operate with low switching frequencies at lighter loads
  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 PROPOSED SYSTEM: VSA, VBAT, and VBUS denote the voltage of the PV port, the battery port, and the load port, respectively. L1, L2, and L3 refer to the dc inductor. CIN, CBAT, and CBUS are the filter capacitors paralleled with the corresponding port. The duty cycles of Q1 to Q3 are represented by d1 to d3, respectively, where d2 and d3 are complementary. The proposed B3C merits high power density by sharing some common power devices, high efficiency by making one stage power conversion from PV or battery or load, high dynamic performance by employing the two- inductor boost topology, and modular and recurrent property by controlling both battery and load port. In addition, battery voltage can be lower than that of main bus for safety purposes.
  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 ADVANTAGES:  Improving the whole topology EMC property and making B3C able to extract maximum power from PV.  The efficiency of the converter is greatly improved.  Leading to high power density.  Reduced costs.  Based on the three-domain main bus control method, the bus voltage is always regulated with high quality in all power flow conditions
  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 BLOCK DIAGRAM:
  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 TOOLS AND SOFTWARE USED:  MPLAB – microcontroller programming.  ORCAD – circuit layout.  MATLAB/Simulink – Simulation
  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 APPLICATIONS:  PV-battery power systems.
  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 CONCLUSION: A new multiinput multioutput dc–dc boost converter with unified structure for hybridizing of power sources in electric vehicles is proposed in this paper. The proposed converter has just one inductor. The proposed converter can be used for transferring energy between different energy resources such as FC, PV, and ESSs like battery and SC. In this paper, FC and battery are considered as power source and ESS, respectively. Also, the converter can be utilized as single input multioutput converter. It is possible to have several outputs with different voltage levels. The converter has two main operation modes which in battery discharging mode both of input sources deliver power to output and in battery charging mode one of the input sources not only supplies loads but also delivers power to the other source (battery). For each modes, transfer functions matrices are obtained separately and compensators for closed loop control of the converter is designed. It is seen that under various conditions such as rapid rise of the loads power and suddenly change of the battery reference current, output voltages and battery current are regulated to desired values. Outputs with different dc voltage levels are appropriate for connection to multilevel inverters. In electric vehicles, using of multilevel inverters leads to torque ripple reduction of induction motors. Also, electric vehicles which use dc motors have at least two different dc voltage levels, one for ventilation system and cabin lightening and other for supplying electric motor. Moreover, in grid connection of renewable energy resources like PV, using of multilevel inverters is useful. Finally, operation of this converter was experimentally verified using low-power range prototype. .
  15. 15. 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] X. Zhang and C. Mi, Vehicle Power Management, New York, NY, USA: Springer, 2011. [2] M. Ehsani, Y. Gao, and A. Emadi, Modern Electric, Hybrid Electric and Fuel Cell Vehicle Fundamentals, Theory and Design, 2nd ed., New York, NY, USA: CRC Press, 2010. [3] P. Thounthong, V. Chunkag, P. Sethakul, B. Davat, and M. Hinaje “Comparative study of fuel-cell vehicle hybridization with battery or supercapacitor storage device,” IEEE Trans. Veh. Technol., vol. 58, no. 8, pp. 3892–3905, Oct. 2009. [4] L. Wang, E. G. Collins, and H. Li “Optimal design and real-time control for energy management in electric vehicles,” IEEE Trans. Veh. Technol., vol. 60, no. 4, pp. 1419–1429, May 2011. [5] M. Zandi, A. Peyman, J. P. Martin, S. Pierfederici, B. Davat, and F. Meybody-tabar “Energy management of a fuel cell/supercapacitor/battery power source for electric vehicular applications,” IEEE Trans. Veh. Technol., vol. 60, no. 2, pp. 433–443, Feb. 2011

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