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Dissertations / Theses on the topic 'Bi-directional Power Converters'

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Published: 6 September 2023

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1

Han, Sangtaek. "High-power bi-directional DC/DC converters with controlled device stresses." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/49010.

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The objective of the research is to develop a cost-effective high-power bi-directional dc/dc converter with low total-device ratings, reduced system parasitic effects, and a wide input/output range. Additional objectives of the research are to develop a small-signal model and control methods, and to present performance characterizations. Device stresses in the proposed topology are controlled to maintain minimal levels by varying the duty ratio and phase-shift angle between the primary and the secondary bridges, which results in a low total-device rating, when compared to conventional bi-direc
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2

Dong, Dong. "Ac-dc Bus-interface Bi-directional Converters in Renewable Energy Systems." Diss., Virginia Tech, 2012. http://hdl.handle.net/10919/28495.

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This dissertation covers several issues related to the ac-dc bus-interface bi-directional converters in renewable energy systems. The dissertation explores a dc-electronic distribution system for residential and commercial applications with a focus on the design of an ac-dc bi-directional converter for such application. This converter is named as the â Energy Control Centerâ due to its unique role in the system. First, the impact of the unbalanced power from the ac grid, especially the single-phase grid, on the dc system operation is analyzed. Then, a simple ac-dc two-stage topology and an
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3

Demetriades, Georgios D. "On small-signal analysis and control of the single- and the dual-active bridge topologies." Doctoral thesis, Stockholm, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-153.

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4

Jain, Manu. "Bi-directional DC-DC converter for low-power applications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape17/PQDD_0008/MQ39979.pdf.

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5

Abu-hamdeh, Muthanna S. "Modeling of Bi-directional Converter for Wind Power Generation." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1259684130.

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6

Li, Yiyang. "Novel power converter topologies to interface solar power to power grid with battery backup." Thesis, University of Sydney, 2020. https://hdl.handle.net/2123/23269.

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The main aim of this thesis is to develop a solar energy system for domestic utilities, using a bi-directional DC-DC boost converter with a battery storage system in it. Topologies of the converters employed in the existing system are not efficient, especially in high power applications because of complicated structures with many power devices. In order to step up the DC voltage of the solar panel to a value suitable for AC power conversion, the DC-DC converter topologies has used either multiple stages of voltage amplification or complicated structures with many power devices as the voltage g
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7

Pepper, Michael. "BI-DIRECTIONAL DCM DC-TO-DC CONVERTER FOR HYBRID ELECTRIC VEHICLES." Master's thesis, University of Central Florida, 2008. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/2672.

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With the recent revival of the hybrid vehicle much advancement in power management has been made. The most popular hybrid vehicle, the hybrid electric vehicle, has many topologies developed to realize this hybrid vehicle. From these topologies, as sub set was created to define a particular group of vehicles where the converter discussed in this thesis has the most advantage. This sub set is defined by two electric sources of power coupled together at a common bus. This set up presents many unique operating conditions which can be handled seamlessly by the DC-to-DC converter when designed prope
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8

Fernando, W. Anand K. "Techniques for Designing HFAC Power Distribution Systems; Power Conversion and Distribution." Thesis, The University of Sydney, 2018. http://hdl.handle.net/2123/17995.

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Modern power distribution systems (PDS) utilize multiple converters, making power flow undergo several conversions between source and the load. Use of high frequency AC (HFAC) in PDSs eliminates a few stages of converters in addition to the smaller sized capacitors and inductors being used; making the converters much lighter in weight offering a variety of solutions for the weight critical applications such as spacecraft, aircraft and electric vehicle onboard PDSs. HFAC converters with resonant filters have been widely used in the past despite of being tuned to a single frequency. Thus, the va
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9

Luan, Austin J. "Bi-Directional Flyback DC-DC Converter for Battery System of the DC House Project." DigitalCommons@CalPoly, 2013. https://digitalcommons.calpoly.edu/theses/1012.

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The DC House project strongly relies on renewable energy sources to provide power to the house for various loads. However, when these sources are unable to provide power at a certain time, a back-up energy source from a battery must be readily available to fulfill the house’s power needs. This thesis proposes a bi-directional flyback power converter to allow a single-stage power path to charge the battery from and to discharge the battery to the DC House 48 V system bus. The design, simulation, and hardware prototype of the proposed flyback bi-directional converter will be conducted to demonst
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10

Wahid, Ferdus. "Analysis Of A Wave Power System With Passive And Active Rectification." Thesis, Uppsala universitet, Institutionen för elektroteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-425722.

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Wave energy converter (WEC) harnesses energy from the ocean to produce electrical power. The electrical power produced by the WEC is fluctuating and is not maximized as well, due to the varying ocean conditions. As a consequence, without any intermediate power conversion stage, the output power from the WEC can not be fed into the grid. To feed WEC output power into the grid, a two-stage power conversion topology is used, where the WEC output power is first converted into DCpower through rectification, and then a DC-AC converter (inverter) is used to supply AC power into the grid. The main mot
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11

Wu, Michael. "Improvements to a Bi-directional Flyback DC-DC Converter for Battery System of the DC House Project." DigitalCommons@CalPoly, 2014. https://digitalcommons.calpoly.edu/theses/1207.

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The DC House project relies primarily on renewable energy sources to provide DC power to the various loads of the house. However, not all renewable sources are capable of providing power at all times of the day. A back-up energy source in the form of a battery storage system must be available to meet the electrical needs of the house. A bi-directional flyback power converter was initially designed to allow a battery to charge from as well as discharge to the 48V bus line of the DC House. The design provided a 35W prototype to demonstrate the converter’s feasibility. Further improvements to inc
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12

Fan, Zaiming. "Investigation on smart bi-directional inverter with quantitative reactive power compensation and interleaved DC/DC converter for micro-grid system." Thesis, University of Cumbria, 2016. http://insight.cumbria.ac.uk/id/eprint/3326/.

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The PhD project aims to develop a smart grid-connected inverter (SGCI) for a micro-grid, which can be applied in a built environment such as a community, and associated power electronic DC/DC converters. The micro-grid generally includes distributed renewable power generators and battery storage. The SGCI is a bi-directional DC/AC inverter for distributed generation with battery storage installed at its DC side. In one aspect, it is expected the DC/AC inverter functions as a controlled inverter that can deliver expected real power to the power grid with quantitative reactive power compensation
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13

Sabbarapu, Bharath Kumar. "DC-DC power converters with multiple outputs." Thesis, 2016. http://hdl.handle.net/1805/10998.

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Indiana University-Purdue University Indianapolis (IUPUI)<br>This study presents a novel converter configuration that is related to the area DC-DC power converters. To begin with, a brief introduction is given by stating the importance of power electronics. Different types of converters, their operating principles and several new topologies that are being proposed over the years, to suit a particular application with specific advantages are listed in detail. In addition, pro- cedure for performing small signal analysis, which is one among the several averaging techniques is summarized in the f
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14

Chang, Syu-Fong, and 張旭鋒. "Development of DSP-Based Bi-directional DC-DC Power Converters." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/z2rvew.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>94<br>This thesis presents the design and implementation of a digital signal processor based bi-directional dc-dc power converter for battery charge and discharge. When power converters operate at boost mode, the low-voltage side battery will discharge and provide power for dc-link; while at buck mode, the high-voltage side dc-link will charge the battery. The output voltage can be steady with voltage and current feedback control. The high-frequency transformer which uses two windings in parallel with power converter, together with the use of interleave control will
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15

李惇榮. "Development of Three-Phase Three-Level Dual Bi-directional Power Converters." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/71044004667411345856.

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碩士<br>國立臺灣科技大學<br>電機工程系<br>92<br>This paper presents the analysis and implementation of a unity power factor, three-phase, three-level, dual bi-directional power converter for induction motor drives. In order to reduce current harmonic, the neutral-point-clamped power converter and power inverter are adopted to convert three-phase electrical power and to drive induction servo motor, respectively. Based on synchronous rotating-frame on the ac input side, the proposed ac-to-dc power converter is employed to improve power factor to unity and to reduce current harmonic as well. The dc-to-ac power
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16

Nimesh, V. "Dual Comparison One Cycle Control for Grid Connected Converters." Thesis, 2017. http://etd.iisc.ac.in/handle/2005/4321.

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Grid connected converters are widely used as front end rectifiers, interface between renewable energy and grid, and power quality applications. Popular control techniques to generate gating signals for active devices, reported in literature are voltage-oriented control, direct power control and one cycle control. In literature, one cycle control has also been reported as scalar resistive emulation or unified constant frequency integration control. The above-mentioned control techniques has been collectively addressed as conventional one cycle control (C-OCC). Light load instability and steady
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17

Wu, Jhe-An, and 吳哲安. "Implementation of Bi-Directional 60Hz-400Hz Medium Frequency Power Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/87ntdy.

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碩士<br>國立高雄應用科技大學<br>電機工程系博碩士班<br>103<br>The frequency of most AC power systems is 50Hz or 60Hz. However, 400Hz power systems are widely used in the aircraft, communications and vessels. If conventional converter input frequency and output frequency are not the same. You must use the AC-DC and DC-AC two-stage power converter to achieve frequency conversion function. If you can use a single-stage power converter and provide two different frequency AC power at the same time, it will improve the flexibility of application for power converter. This thesis develops a bi-directional 60Hz-400Hz medium
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18

Lin, Li-Wei, and 林立韋. "A Bi-directional DC/DC Converter for a Fuel Cell Power System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/98778066388037724481.

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博士<br>中原大學<br>電機工程研究所<br>95<br>In recent years, growing concerns about environmental issues have demanded more clean energy sources such as fuel cells, wind turbines, and photovoltaic arrays. The rapid advances in fuel cell technology and power electronics have enabled the significant developments in fuel cell power system. The fuel cells have numerous advantages such as high density current output ability, clean electricity generation and high efficiency operation. However, the fuel cell characteristics are different from that of the traditional chemical-powered battery. The fuel cell output
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19

WEI, SI-XAING, and 韋思翔. "The Implementation of Bi-Directional Frequency Power Converter Based on Decoupling Technique." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/h4tb2k.

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碩士<br>國立高雄應用科技大學<br>電機工程系博碩士班<br>106<br>The frequency of most AC power systems is 50Hz or 60Hz. However the 400Hz power systems are used in the communications, vessels and aircraft. If there is a frequency converter that can convert 400Hz voltage to 60Hz and 50Hz, or convert 60Hz or 50Hz voltage to 400Hz, it will improve the flexibility of 60Hz and 50Hz general power supplies and the convenience of using special power equipments with 400Hz voltage. This paper proposes a 60Hz-400Hz bi-directional frequency power converter based on decoupling technique. Through the decoupling technology, the fun
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20

Essakiappan, Somasundaram. "Bi-directional Current-fed Medium Frequency Transformer Isolated AC-DC Converter." Thesis, 2010. http://hdl.handle.net/1969.1/ETD-TAMU-2010-05-7743.

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The use of high power converters has increased tremendously. Increased demand for transportation, housing and industrial needs means that more number of power converters interact with the utility power grid. These converters are non-linear and they draw harmonic currents, significantly affecting power quality. To reduce harmonics, filters, power factor correction circuits and capacitor banks are required. And the development of hybrid technologies and renewable energy power stations trigger a demand for power converters with bi-directional capabilities. The objective of this thesis is to devel
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21

Huang, Hong-jen, and 黃弘任. "Design of Bi-directional Power Converter Circuit under Electric Vehicle to Grid Concepts." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/30469915340062562029.

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碩士<br>國立臺南大學<br>電機工程學系碩士班<br>101<br>Nowadays electric utilizes globally are heavily investing to upgrade their antiquated delivery, pricing, and service networks including investments in the advanced metering infrastructure which usually includes direct control and monitoring of devices and appliances inside customer premises. Therefore this thesis is aimed to develop a smart charger of electric vehicle with power converters and super-capacitor enhancement, hence anticipating reaching the rapid battery-charging speed and the bidirectional line interactive for further smart grid. The method pro
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22

Lin, Wen-Tau, and 林文韜. "Study and Implementation of an Isolated High-power Bi-directional DC-DC Converter." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/46448765906926673864.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>104<br>In this thesis, an isolated high-power bi-directional DC-DC converter is studied and implemented. The prototype circuit consists of two stages of bidirectional DC-DC converters. The stage attached to the battery-side is an interleaved buck/boost converter, and the stage of the grid-side is a three-phase series resonant converter. The battery-side stage consists of two buck / boost converters, so the load current can be shared by these two circuits. Consequently, it can reduce the stress of the switch elements. Besides, the switching control signals of the two
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23

Huang, Chun-Chieh, and 黃俊傑. "Design of High Power Bi-directional DC-DC Converter Module for Electric Ships." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/y7qfbs.

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碩士<br>國立臺灣科技大學<br>電子工程系<br>105<br>In this thesis, a high power bi-directional DC-DC converter module for electric ships is studied and implemented, to be used for energy conversion between battery and DC bus. The module consists of two-stage circuits: a bi-directional buck/boost converter at battery side and a full-bridge series resonant converter at DC bus side. The developed bi-directional DC-DC converter module can be applied to the electric ship power system for charging/ discharging between battery and DC bus and adjusting bidirectional power transfer. In addition to establish a bi-direct
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24

Yang, Chung-Kuang, and 楊鎮光. "Design and Implementation of a CLLC Resonant Converter with Bi-Directional Power Flow." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hytec2.

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碩士<br>國立臺北科技大學<br>電機工程系<br>106<br>This paper is aimed to design and implement a CLLC resonant DC-DC converter with bi-directional power flow control, which is installed in front end of energy storage system (ESS) to act as energy buffer for load. The CLLC will provide extra power from ESS to load side when the load needed transient power. In contrast, the CLLC will store the regenerated energy from load side to ESS. Therefore, the pulsating energy yielded by transient load can be reduced through CLLC. Hence, not only the current stress of the front-end AC-DC converter or rectifier but also the
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25

Wang, Chao-Fu, and 王釗桴. "Study and Implement of a High Power Isolated Bi-directional Three-Phase DC-DC Converter." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/99138964430424519419.

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博士<br>國立臺灣科技大學<br>電子工程系<br>102<br>This dissertation presents a isolated bi-directional DC-DC converter can be applied in power generation system and battery array testing system. The topology of this converter is a three-phase full-bridge type, that is mainly consists of three half-bridge switch legs (six switches), three isolated transformers, three half-bridge synchronous rectification switch legs and inductor. The three isolated transformers are configured in Y-Δ connection with series high-voltage side and parallel low-voltage side, it can reduce the turns of Y side and the winding current
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26

Wu, Jia Ying, and 吳佳穎. "Design and Implementation of High Power Bi-directional Three-Phase Four-Wire Half-bridge Converter." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/19471699644576233226.

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碩士<br>國立清華大學<br>電機工程學系<br>103<br>This thesis presents a high power bi-directional three-phase four-wire half bridge converter for charger/discharger systems, including grid-connection mode, rectification mode and dc-bus voltage regulation mode. In grid-connection mode, power is transferred from DC to AC and injected into the utility grid. In rectification mode, the utility power is transformed to DC with power factor correction. In dc-bus voltage regulation mode, the converter can inject power into the utility grid or supply DC loads when the bus voltage is higher than the setpoint. On the
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27

Lin, Yun-tung, and 林芸彤. "A Triple-Winding High Step-up/down Bi-directional Converter for Green-energy Power System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/02205859442345471153.

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碩士<br>國立高雄第一科技大學<br>電子工程系碩士在職專班<br>103<br>The aim of this thesis is to present a converter, which can achieve high voltage gain, reduce cost, and promote efficiency. It has the intrinsic features of leakage energy recycling and zero-voltage switching. The presented converter consists of a boost converter, a buck-boost converter, and a high frequency transformer. As compared to traditional bi-directional DC-DC converters, fewer power active components, lower cost, easier control design are its advantages. Under the same conditions of turns ratio and duty ratio, higher voltage gain can be accomp
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28

Siao, Kun-Cheng, and 蕭琨澄. "Single-phase Bi-directional AC/DC Converter with Power Factor Correction and Phase-Locked Loop." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/14660587232864353104.

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碩士<br>國立中山大學<br>電機工程學系研究所<br>102<br>With the development of smart grids, more and more Distributed Generation Systems (DGSs) and Renewable Energy Generation Systems (REGSs) will be interconnected to power grids in the foreseeing future. Most of DGSs and REGSs are DC power sources; therefore, power inverters are used to convert DC power of DGSs and REGSs to AC powers and to interconnect to power grids. In addition, most of REGSs are unstable power sources; they require Energy Storage Systems (ESSs) to stabilize output power. The ESSs can be charged by the REGSs and by power grids if necessary,
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29

Liao, Chang-Hung, and 廖長鴻. "Design and Implementation of a Bi-directional Full-Bridge DC-DC Converter for High Power Application." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/u42baf.

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碩士<br>國立臺北科技大學<br>電力電子產業研發碩士專班<br>98<br>This thesis is aimed to design a bi-directional full-bridge DC-DC converter for high power application, its buck and boost mode are implemented through phase-shift full-bridge and current-fed full-bridge circuit structure. To overcome the power limitation of high-frequency transformer, therefore multiple transformers connected in parallel are carried out to increase output power. A careful components placement and layout of power circuit are proposed to guarantee well current sharing among paralleled transformers and less leakage inductance. The proposed
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30

Yeh, Yu-Ting, and 葉昱廷. "A Single-phase DC-AC Converter with High Dynamic Response and Bi-directional Power Flow Control." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/4sfwp7.

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碩士<br>國立臺北科技大學<br>電機工程系研究所<br>99<br>This paper is aimed to design a single-phase DC- AC converter with bi-directional power flow control. The converter is implemented by a full-bridge circuit with bipolar PWM control to act as grid-connected inverter or provide transient current to non-linear load to reduce AC voltage harmonics. A power device with both motoring and generating mode is connected to DC link and controls power flow between power device in DC-side and power grid in AC-side of the proposed DC-AC converter according to DC link voltage. The converter becomes DC-AC converter and sends
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31

Δημητρακάκης, Στέφανος. "Ανάπτυξη δυναμικού μοντέλου και έλεγχος ανεμογεννήτριας συνδεδεμένης στο δίκτυο και σε αυτόνομη λειτουργία εφοδιασμένη με διάταξη αποθήκευσης ενέργειας". Thesis, 2014. http://hdl.handle.net/10889/7831.

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Η παρούσα διπλωματική εργασία πραγματεύεται τη μελέτη και τη μοντελοποίηση ενός αιολικού συστήματος παραγωγής ηλεκτρικής ενέργειας βασισμένο σε σύγχρονη γεννήτρια μόνιμου μαγνήτη (PMSG). Ειδικότερα, παρουσιάζονται και αναλύονται όλα τα τμήματα που αποτελούν το αιολικό σύστημα καθώς και οι λογικές ελέγχου που ακολουθήθηκαν για την αποτελεσματική λειτουργία του. Επιπλέον, μελετάται και μοντελοποιείται μια διάταξη αποθήκευσης ενέργειας από την οποία πλαισιώνεται το αιολικό σύστημα κατά την αυτόνομη λειτουργία του. Τέλος, παρουσιάζονται και σχολιάζονται τα αποτελέσματα της προσομοίωσης της λειτουρ
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32

Moshirvaziri, Mazhar. "Ultracapacitor/Battery Hybrid Energy Storage Systems for Electric Vehicles." Thesis, 2012. http://hdl.handle.net/1807/33458.

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This thesis deals with the design of Hybrid Energy Storage System (HESS) for Light Electric Vehicles (LEV) and EVs. More specifically, a tri-mode high-efficiency non-isolated half-bridge converter is developed for the LEV based HESS applications. A 2 kW, 100 V interleaved two-phase converter prototype was implemented. The peak efficiency of 97.5% and a minimum efficiency of 88% over the full load range are achieved. Furthermore, a power-mix optimizer utilizing the real-time Global Positioning System (GPS) data for the EV based HESS is proposed. For a specific design, it is shown that at the co
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