Design Analysis And Modelling Of Modular Medium Voltage Dc Dc Converter Based Systems

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Design, Analysis, and Modelling of Modular Medium-voltage DC/DC Converter Based Systems

Author : Ahmed Adel Aboushady
Publisher :
ISBN 13 :
Total Pages : 546 pages
Book Rating : 4.:/5 (966 download)

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Book Synopsis Design, Analysis, and Modelling of Modular Medium-voltage DC/DC Converter Based Systems by : Ahmed Adel Aboushady

Download or read book Design, Analysis, and Modelling of Modular Medium-voltage DC/DC Converter Based Systems written by Ahmed Adel Aboushady and published by . This book was released on 2012 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the design and analysis of modular medium-voltage dc/dc converter based systems. An emerging converter application is feeding offshore oil and gas production systems located in deep waters, on the sea bed, distant from the onshore terminal. The phase-controlled series-parallel resonant converter (SPRC) is selected as the dc/dc converter unit, for a 10kV dc transmission system. The converter has a high efficiency in addition to favourable soft switching characteristics offered by resonant converters which enable high frequency operation, hence designs with reduced footprints. The phase-controlled SPRC is studied in the steady-state and a new analysis is presented for the converter operational modes, voltage gain sensitivity, and analytically derived operational efficiency. The maximum efficiency criterion is used as the basis for selection of converter full load operational conditions. The detailed design of the output LC filter involves new mathematical expressions for interleaved multi-module operation. A novel large signal dynamic model is proposed for the phase-controlled SPRC with state feedback linearization. The model preserves converter large signal characteristics while providing a tool for faster simulation and simplified closed loop design and stability analysis. Using this model, a Kalman filter based estimator is proposed and applied for sensorless multi-loop output voltage control. The objective is to enhance the single-loop PI control dynamic response and closed loop stability with no additional sensors required for the inner loop state variables. Dynamic performance and robustness of the converter to operational circuit parameter variations are achieved with three new robust controllers; namely, Lyapunov, sliding mode, and predictive controllers. Finally, converter multi-module operation is studied, catering for voltage and current sharing of the subsea load-side step-down converter. To achieve a step-down voltage, the phase-controlled SPRC modules are connected in an input-series connection to share the medium level transmission voltage. Output-series and output-parallel connections are used to reach higher power levels. A new sensorless load voltage estimator is developed for converters remotely controlled. Matlab/Simulink simulations and experimental prototype results are used to substantiate all the proposed analysis techniques and control algorithms.

Design, Analysis, and Control of the Modular Multilevel DC/DC Converter for Medium- and High-voltage DC Grids

Author : Ramin Razani
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Design, Analysis, and Control of the Modular Multilevel DC/DC Converter for Medium- and High-voltage DC Grids by : Ramin Razani

Download or read book Design, Analysis, and Control of the Modular Multilevel DC/DC Converter for Medium- and High-voltage DC Grids written by Ramin Razani and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nowadays, renewable energy sources have gained escalating importance due to environmental and economic reasons. However, these energy sources are primarily located in remote areas and distant from load centers. High-voltage dc (HVDC) and medium-voltage dc (MVDC) systems have been proposed in the last decades for efficient and reliable integration of renewable energy resources. To date, a noticeable number of these dc systems are established around the world. Recently, researchers have proposed the concept of "DC grids," which can be realized by connecting the existing point-to-point dc systems. This structure can improve the efficiency and stability of the power system. However, one of the most concerning challenges related to this concept is the interconnection of already built dc systems. Because existing dc systems are built through time, they possibly have different voltage levels and grounding systems. To address this challenge, the dc/dc modular multilevel converter (MMC) is proposed in the literature as one of the most promising solutions. This converter offers the advantages of modularity, scalability, and high efficiency. Few studies have been conducted on the modeling and control of the dc/dc MMC. The literature falls short in several aspects, such as improved design, analysis of operation limits, fault-tolerant operation, converter analysis under uncertainty, and development of advanced controllers and efficient fault-blocking capability. This research aims to 1) develop an augmented design approach that considers both control and hardware aspects of the converter, 2) investigate the operation limit of the hybrid dc/dc MMC caused by the capacitors voltages unbalance, 3) develop a tailored fault-tolerant operation strategy without additional submodules (SMs), 4) analyze the unsymmetrical operation of the dc/dc MMC caused by parametric uncertainty, 5) develop an advanced controller based on the model predictive control for the dc/dc MMC, and 6) realize an efficient fault-blocking capability by proper selection of SMs. The first study in this thesis facilitates the dc/dc MMC design with a smaller number of SMs and higher efficiency. Unlike the previous literature, the analytical results of the second study show that the capacitors voltages balance in the hybrid dc/dc MMC limits the operation range of the converter. In the third study, first, the unique features of the dc/dc MMC are investigated. These features make the fault-tolerant operation possible without the need for additional SMs. Then, utilizing these features, a tailored fault-tolerant operation strategy is developed to cope with several SMs failures. When the parametric uncertainty comes into action, it can force the converter to work in unsymmetrical conditions. The fourth study develops steady-state models representing the behavior of the converter in unsymmetrical conditions, and then the maximum tolerable variation of parameters is found in different practical cases. An advanced controller based on the model predictive control is developed in the fifth study to improve the steady-state and transient performances of the dc/dc MMC. Finally, an efficient fault-blocking capability is realized by adequately selecting the number and type of SMs. Detailed time-domain simulations under the MATLAB/Simulink environment validate the analytical results. This research contributed to the fundamental understanding of the dc/dc MMC operation and significantly improved the converter efficiency, reliability, and steady-state and dynamic performances.

Modular Medium-Voltage DC/DC Converter Based Systems

Author : Ahmed Aboushady
Publisher : LAP Lambert Academic Publishing
ISBN 13 : 9783659591716
Total Pages : 292 pages
Book Rating : 4.5/5 (917 download)

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Book Synopsis Modular Medium-Voltage DC/DC Converter Based Systems by : Ahmed Aboushady

Download or read book Modular Medium-Voltage DC/DC Converter Based Systems written by Ahmed Aboushady and published by LAP Lambert Academic Publishing. This book was released on 2014-08-21 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: A modular approach for connecting dc/dc converters is a technique proposed for constructing high power level converter architectures. The main advantages of a modular approach include, increased fault tolerance introduced by redundant modules, standardization of components leading to reduced manufacturing cost and time, power systems can be easily expanded, and higher power density of the overall system, especially with interleaving. System reliability is potentially improved due to redundancy but this must be traded off against the increased number of power electronic devices. Compared with direct series/parallel connection of power devices, modularity serves better when factors such as converter reconfiguration and power level scaling, as well as interleaving to reduce filter requirements, are considered. The main objective of this work is to design, analyse, model and control modular medium-power medium-voltage dc/dc converter based systems. A typical application considered for this modular approach is feeding subsea electrically actuated oil and gas production systems, from onshore terminals, but the proposed converter can be also applied to other applications.

Modular Multilevel Converters

Author : Sixing Du
Publisher : John Wiley & Sons
ISBN 13 : 1119366305
Total Pages : 360 pages
Book Rating : 4.1/5 (193 download)

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Book Synopsis Modular Multilevel Converters by : Sixing Du

Download or read book Modular Multilevel Converters written by Sixing Du and published by John Wiley & Sons. This book was released on 2018-01-11 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: An invaluable academic reference for the area of high-power converters, covering all the latest developments in the field High-power multilevel converters are well known in industry and academia as one of the preferred choices for efficient power conversion. Over the past decade, several power converters have been developed and commercialized in the form of standard and customized products that power a wide range of industrial applications. Currently, the modular multilevel converter is a fast-growing technology and has received wide acceptance from both industry and academia. Providing adequate technical background for graduate- and undergraduate-level teaching, this book includes a comprehensive analysis of the conventional and advanced modular multilevel converters employed in motor drives, HVDC systems, and power quality improvement. Modular Multilevel Converters: Analysis, Control, and Applications provides an overview of high-power converters, reference frame theory, classical control methods, pulse width modulation schemes, advanced model predictive control methods, modeling of ac drives, advanced drive control schemes, modeling and control of HVDC systems, active and reactive power control, power quality problems, reactive power, harmonics and unbalance compensation, modeling and control of static synchronous compensators (STATCOM) and unified power quality compensators. Furthermore, this book: Explores technical challenges, modeling, and control of various modular multilevel converters in a wide range of applications such as transformer and transformerless motor drives, high voltage direct current transmission systems, and power quality improvement Reflects the latest developments in high-power converters in medium-voltage motor drive systems Offers design guidance with tables, charts graphs, and MATLAB simulations Modular Multilevel Converters: Analysis, Control, and Applications is a valuable reference book for academic researchers, practicing engineers, and other professionals in the field of high power converters. It also serves well as a textbook for graduate-level students.

Analysis and Design of Multicell DC/DC Converters Using Vectorized Models

Author : Thierry Meynard
Publisher : John Wiley & Sons
ISBN 13 : 1119081335
Total Pages : 163 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Analysis and Design of Multicell DC/DC Converters Using Vectorized Models by : Thierry Meynard

Download or read book Analysis and Design of Multicell DC/DC Converters Using Vectorized Models written by Thierry Meynard and published by John Wiley & Sons. This book was released on 2015-02-23 with total page 163 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shows how the concepts of vectorization and design masks can be used to help the designer in comparing different designs and making the right choices. The book addresses series and parallel multicell conversion directly, and the concepts can be generalized to describe other topologies.

Multi-terminal High-voltage Converter

Author : Bo Zhang
Publisher : John Wiley & Sons
ISBN 13 : 1119188350
Total Pages : 224 pages
Book Rating : 4.1/5 (191 download)

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Book Synopsis Multi-terminal High-voltage Converter by : Bo Zhang

Download or read book Multi-terminal High-voltage Converter written by Bo Zhang and published by John Wiley & Sons. This book was released on 2018-10-19 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: An all-in-one guide to high-voltage, multi-terminal converters, this book brings together the state of the art and cutting-edge techniques in the various stages of designing and constructing a high-voltage converter. The book includes 9 chapters, and can be classified into three aspects. First, all existing high-voltage converters are introduced, including the conventional two-level converter, and the multi-level converters, such as the modular multi-level converter (MMC). Second, different kinds of multi-terminal high-voltage converters are presented in detail, including the topology, operation principle, control scheme and simulation verification. Third, some common issues of the proposed multi-terminal high-voltage converters are discussed, and different industrial applications of the proposed multi-terminal high-voltage converters are provided. Systematically proposes, for the first time, the design methodology for high-voltage converters in use of MTDC grids; also applicable to constructing novel power electronics converters, and driving the development of HVDC, which is one of the most important technology areas Presents the latest research on multi-terminal high-voltage converters and its application in MTDC transmission systems and other industrially important applications Offers an overview of existing technology and future trends of the high-voltage converter, with extensive discussion and analysis of different types of high-voltage converters and relevant control techniques (including DC-AC, AC-DC, DC-DC, and AC-AC converters) Provides readers with sufficient context to delve into the more specialized topics covered in the book Featuring a series of novel multi-terminal high-voltage converters proposed and patented by the authors, Multi-terminal High Voltage Converters is written for researchers, engineers, and advanced students specializing in power electronics, power system engineering and electrical engineering.

Design and Performance Analysis of a Medium-power Dc-dc Converter

Author : Arthur G. Birchenough
Publisher :
ISBN 13 :
Total Pages : 28 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Design and Performance Analysis of a Medium-power Dc-dc Converter by : Arthur G. Birchenough

Download or read book Design and Performance Analysis of a Medium-power Dc-dc Converter written by Arthur G. Birchenough and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: The design and performance of an experimental dc-dc converter are described. The converter was rated for a power output of 1 kW, with a 150-percent overload rating, and it produced a 200-V, +1-percent, dc output from an input of 56 V, +10 and -20 percent. Voltage regulation is accomplished by varying the duty cycle of the internal 7-kHz quasi-square-wave carrier. Integrated circuits in the control section, a proportional current drive system, and powdered metal cores (Ni-17Fe-2Mo) for the power transformer were some of the design features. The measured efficiency peaked at 92 percent and was 88 percent at 1 kW. The total component weight was 6 lb (2.7 kg).

Dv/dt Analysis and Its Mitigation Methods in Medium Voltage SiC Modular Multilevel Converters

Author : Xiao Li (Power electronics engineer)
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (14 download)

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Book Synopsis Dv/dt Analysis and Its Mitigation Methods in Medium Voltage SiC Modular Multilevel Converters by : Xiao Li (Power electronics engineer)

Download or read book Dv/dt Analysis and Its Mitigation Methods in Medium Voltage SiC Modular Multilevel Converters written by Xiao Li (Power electronics engineer) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modular multilevel converters (MMCs) are currently widely used in medium and high voltage applications. In recent years, with the rapid development of silicon carbide (SiC) devices, growing attention has been placed on adopting SiC devices in MMCs. Thanks to the device's superior electrical and thermal characteristics, the SiC devices, especially the emerging medium voltage ones, are promising to benefit MMC based systems in numerous specifications, such as improved power density, reduced thermal stress, and higher efficiency. However, medium voltage systems can also experience challenges brought about by devices' fast switching speed, including worse electromagnetic interference (EMI), reflected wave phenomenon, and partial discharge. To better utilize the SiC devices in MMCs, this dissertation seeks to evaluate the effects of applying SiC power modules in MMCs. The analysis and discussions include the influential factors of the dv/dt seen at the load terminal, the dv/dt reduction methods, and the effect of high dv/dt on EMI noise and the system insulation design. The analysis is based on a 1 MVA MMC built with the 1.7 kV rated SiC power modules. The influential factors are discussed in three aspects: the source of high dv/dt, the propagation loop, and the control methods. The effects of the three aspects are discussed and evaluated with mathematical models, spice simulations, and hardware tests. It is straightforward that the load terminal dv/dt would change along with the device terminal dv/dt, which is the source of the high switching speed noise. Moreover, the design of passive components in a MMC system also affects the dv/dt by introducing the filtering effect. That is, the parasitic components and the arm inductors would form R-L-C networks between the power modules and the load, and the high order networks would bring down the dv/dt along the propagation loop of the switching transients. Last but not least, the control methods also affect the dv/dts at the load terminal, and the effect is realized via coordinating the switching transients of the two arm voltages. The analysis follows with the dv/dt reduction methods. Corresponding to the factors that affect the dv/dts, the voltage slew rate can be reduced by changing the power devices' switching speed, the passive components design, and different control methods. It is proved via simulation and experiments that the three methods can relieve the dv/dt stress on the load terminal with no or minor loss penalty. At the same time, the high dv/dt also introduces more concerns about the EMI noise and insulation-related issues. In this work, the insulation design concerns and the EMI performance are discussed based on the common mode model of the system. The EMI noises are evaluated with three indicators, including the leakage current that goes through the dc link middle point to the ground, the common-mode voltage of the load side neutral point, and the equivalent voltage drop on the human impedance network. The tests are carried out under different operation conditions to analyze the impact of modulation index, control methods, and the common mode impedance of the power loop.

Average Current-Mode Control of DC-DC Power Converters

Author : Marian K. Kazimierczuk
Publisher : John Wiley & Sons
ISBN 13 : 1119525659
Total Pages : 340 pages
Book Rating : 4.1/5 (195 download)

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Book Synopsis Average Current-Mode Control of DC-DC Power Converters by : Marian K. Kazimierczuk

Download or read book Average Current-Mode Control of DC-DC Power Converters written by Marian K. Kazimierczuk and published by John Wiley & Sons. This book was released on 2022-03-14 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: AVERAGE CURRENT-MODE CONTROL OF DC-DC POWER CONVERTERS An authoritative one-stop guide to the analysis, design, development, and control of a variety of power converter systems Average Current-Mode Control of DC-DC Power Converters provides comprehensive and up-to-date information about average current-mode control (ACMC) of pulse-width modulated (PWM) dc-dc converters. This invaluable one-stop resource covers both fundamental and state-of-the-art techniques in average current-mode control of power electronic converters???featuring novel small-signal models of non-isolated and isolated converter topologies with joint and disjoint switching elements and coverage of frequency and time domain analysis of controlled circuits. The authors employ a systematic theoretical framework supported by step-by-step derivations, design procedures for measuring transfer functions, challenging end-of-chapter problems, easy-to-follow diagrams and illustrations, numerous examples for different power supply specifications, and practical tips for developing power-stage small-signal models using circuit-averaging techniques. The text addresses all essential aspects of modeling, design, analysis, and simulation of average current-mode control of power converter topologies, such as buck, boost, buck-boost, and flyback converters in operating continuous-conduction mode (CCM). Bridging the gap between fundamental modeling methods and their application in a variety of switched-mode power supplies, this book: Discusses the development of small-signal models and transfer functions related to the inner current and outer voltage loops Analyzes inner current loops with average current-mode control and describes their dynamic characteristics Presents dynamic properties of the poles and zeros, time-domain responses of the control circuits, and comparison of relevant modeling techniques Contains a detailed chapter on the analysis and design of control circuits in time-domain and frequency-domain Provides techniques required to produce professional MATLAB plots and schematics for circuit simulations, including example MATLAB codes for the complete design of PWM buck, boost, buck-boost, and flyback DC-DC converters Includes appendices with design equations for steady-state operation in CCM for power converters, parameters of commonly used power MOSFETs and diodes, SPICE models of selected MOSFETs and diodes, simulation tools including introductions to SPICE, MATLAB, and SABER, and MATLAB codes for transfer functions and transient responses Average Current-Mode Control of DC-DC Power Converters is a must-have reference and guide for researchers, advanced graduate students, and instructors in the area of power electronics, and for practicing engineers and scientists specializing in advanced circuit modeling methods for various converters at different operating conditions.

DC—DC Converters for Future Renewable Energy Systems

Author : Neeraj Priyadarshi
Publisher : Springer Nature
ISBN 13 : 9811643881
Total Pages : 480 pages
Book Rating : 4.8/5 (116 download)

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Book Synopsis DC—DC Converters for Future Renewable Energy Systems by : Neeraj Priyadarshi

Download or read book DC—DC Converters for Future Renewable Energy Systems written by Neeraj Priyadarshi and published by Springer Nature. This book was released on 2021-09-27 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book presents the analysis and control of numerous DC-DC converters widely used in several applications such as standalone, grid integration, and motor drives-based renewable energy systems. The book provides extensive simulation and practical analysis of recent and advanced DC-DC power converter topologies. This self-contained book contributes to DC-DC converters design, control techniques, and industrial as well as domestic applications of renewable energy systems. This volume will be useful for undergraduate/postgraduate students, energy planners, designers, system analysis, and system governors.

Design and Control of Power Converters 2019

Author : Manuel Arias
Publisher : MDPI
ISBN 13 : 3036515631
Total Pages : 402 pages
Book Rating : 4.0/5 (365 download)

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Book Synopsis Design and Control of Power Converters 2019 by : Manuel Arias

Download or read book Design and Control of Power Converters 2019 written by Manuel Arias and published by MDPI. This book was released on 2021-07-02 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this book, 20 papers focused on different fields of power electronics are gathered. Approximately half of the papers are focused on different control issues and techniques, ranging from the computer-aided design of digital compensators to more specific approaches such as fuzzy or sliding control techniques. The rest of the papers are focused on the design of novel topologies. The fields in which these controls and topologies are applied are varied: MMCs, photovoltaic systems, supercapacitors and traction systems, LEDs, wireless power transfer, etc.

Emerging Power Converters for Renewable Energy and Electric Vehicles

Author : Md. Rabiul Islam
Publisher : CRC Press
ISBN 13 : 1000374092
Total Pages : 419 pages
Book Rating : 4.0/5 (3 download)

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Book Synopsis Emerging Power Converters for Renewable Energy and Electric Vehicles by : Md. Rabiul Islam

Download or read book Emerging Power Converters for Renewable Energy and Electric Vehicles written by Md. Rabiul Islam and published by CRC Press. This book was released on 2021-05-30 with total page 419 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book covers advancements of power electronic converters and their control techniques for grid integration of large-scale renewable energy sources and electrical vehicles. Major emphasis is on transformer-less direct grid integration, bidirectional power transfer, compensation of grid power quality issues, DC system protection and grounding, interaction in mixed AC/DC systems, AC and DC system stability, design of high-frequency high power density systems with advanced soft magnetic materials, modeling and simulation of mixed AC/DC systems, switching strategies for enhanced efficiency, and protection and reliability for sustainable grid integration. This book is an invaluable resource for professionals active in the field of renewable energy and power conversion. Md. Rabiul Islam received his PhD from the University of Technology Sydney (UTS), Australia. He was appointed as a Lecturer at Rajshahi University of Engineering & Technology (RUET) in 2005 and promoted to full-term Professor in 2017. In early 2018, he joined the School of Electrical, Computer, and Telecommunications Engineering, University of Wollongong, Australia. He is a Senior Member of IEEE. His research interests include the fields of power electronic converters, renewable energy technologies, power quality, electrical machines, electric vehicles, and smart grids. He has authored or coauthored more than 200 publications including 50 IEEE Transactions/IEEE Journal papers. He has been serving as an editor for IEEE Transactions on Energy Conversion and IEEE Power Engineering Letters, and associate editor for IEEE Access. Md. Rakibuzzaman Shah is a Senior Lecturer with the School of Engineering, Information Technology and Physical Science at Federation University Australia. He has worked and consulted with distribution network operators and transmission system operators on individual projects and has done collaborative work on a large number of projects (EPSRC project on multi-terminal HVDC, Scottish and Southern Energy multi-infeed HVDC) - primarily on the dynamic impact of integrating new technologies and power electronics into large systems. He is an active member of the IEEE and CIGRE. He has more than 70 international publications and has spoken at the leading power system conferences around the world. His research interests include future power grids (i.e., renewable energy integration, wide-area control), asynchronous grid connection through VSC-HVDC, application of data mining in power system, distribution system energy management, and low carbon energy systems. Mohd. Hasan Ali is currently an Associate Professor with the Electrical and Computer Engineering Department at the University of Memphis, USA, where he leads the Electric Power and Energy Systems (EPES) Laboratory. His research interests include advanced power systems, smart-grid and microgrid systems, renewable energy systems, and cybersecurity issues in modern power grids. Dr. Ali has more than 190 publications, including 2 books, 4 book chapters, 2 patents, 60 top ranked journal papers, 96 peer-reviewed international conference papers, and 20 national conference papers. He serves as the editor of the IEEE Transactions on Sustainable Energy and IET-Generation, Transmission and Distribution (GTD) journal. Dr. Ali is a Senior Member of the IEEE Power and Energy Society (PES). He is also the Chair of the PES of the IEEE Memphis Section.

Modeling, Operation, and Analysis of DC Grids

Author : Alejandro Garces
Publisher : Academic Press
ISBN 13 : 012822102X
Total Pages : 388 pages
Book Rating : 4.1/5 (282 download)

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Book Synopsis Modeling, Operation, and Analysis of DC Grids by : Alejandro Garces

Download or read book Modeling, Operation, and Analysis of DC Grids written by Alejandro Garces and published by Academic Press. This book was released on 2021-07-01 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modeling, Operation, and Analysis of DC Grids presents a unified vision of direct current grids with their core analysis techniques, uniting power electronics, power systems, and multiple scales of applications. Part one presents high power applications such as HVDC transmission for wind energy, faults and protections in HVDC lines, stability analysis and inertia emulation. The second part addresses current applications in low voltage such as microgrids, power trains and aircraft applications. All chapters are self-contained with numerical and experimental analysis. Provides a unified, coherent presentation of DC grid analysis based on modern research in power systems, power electronics, microgrids and MT-HVDC transmission Covers multiple scales of applications in one location, addressing DC grids in electric vehicles, microgrids, DC distribution, multi-terminal HVDC transmission and supergrids Supported by a unified set of MATLAB and Simulink test systems designed for application scenarios

Design, Analysis and Operation of Hybrid Modular Multilevel Converters for HVDC Applications

Author : Zeng Rong
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Design, Analysis and Operation of Hybrid Modular Multilevel Converters for HVDC Applications by : Zeng Rong

Download or read book Design, Analysis and Operation of Hybrid Modular Multilevel Converters for HVDC Applications written by Zeng Rong and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis investigates the design, analysis, and operation of modular multilevel converters (MMC) for HVDC applications. Based on the operation principles of the MMC, the operation of MMC under asymmetrical arm impedance conditions is analysed using three equivalent sub-circuits at different freqeuncy. Detail analysis of the impact of asymmetrical conditions on the differential-mode current, the common-mode current and sub-module (SM) capacitor voltages, is performed. Based on the analysis, the corresponding control targets and an improved control strategy are designed to improve the operation performance. Considering the advantages of half-bridge based SM (HBSM) and full-bridge based SM (FBSM), a hybrid MMC (H-MMC) configuration consisting of FBSMs and HBSMs is proposed. By adopting the negative voltage state for some of the FBSMs, the output voltage range is extended to increase converter power transmission capability. By considering the relationships between the AC and DC voltages, AC, DC and arm currents, the ratio of the numbers of the FBSM to HBSM is analysed in order to maintain capacitor voltage balance and retain DC fault blocking capability. An equivalent circuit for the H-MMC is proposed, which considers each arm to be consisted of two individual voltage sources. This model is used to analyse SM capacitor voltage balancing and ripple. A two-stage selection and sorting algorithm is developed to ensure capacitor voltage balancing among the SMs. The proposed H-MMC is compared to other topologies in terms of power device utilization and power losses, and it shows that the H-MMC has higher device utilization and lower power loss than the conventional FBSM based MMC; Furthermore, The DC fault ride-through capability of the H-MMC are discussed. It is found that the H-MMC can not only isolate the DC fault, but also coniture operating at a wide DC voltage range from zero to rated value. Such two features of the H-MMC show the advantages in the hybrid configurations over the conventional FBSM and HBSM systems. Finally, two applications based on the proposed H-MMC are presented; one is a high power DC/DC converter with fault blocking capability for interconnecting large HVDC systems, and the other is a hybrid HVDC transmission system comprising a wind farm side VSC based on the H-MMC and a grid side LCC for transmitting wind power to AC grid.

Laboratory Manual for Pulse-Width Modulated DC-DC Power Converters

Author : Marian K. Kazimierczuk
Publisher : John Wiley & Sons
ISBN 13 : 1119053757
Total Pages : 278 pages
Book Rating : 4.1/5 (19 download)

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Book Synopsis Laboratory Manual for Pulse-Width Modulated DC-DC Power Converters by : Marian K. Kazimierczuk

Download or read book Laboratory Manual for Pulse-Width Modulated DC-DC Power Converters written by Marian K. Kazimierczuk and published by John Wiley & Sons. This book was released on 2015-08-13 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to complement a range of power electronics study resources, this unique lab manual helps students to gain a deep understanding of the operation, modeling, analysis, design, and performance of pulse-width modulated (PWM) DC-DC power converters. Exercises focus on three essential areas of power electronics: open-loop power stages; small-signal modeling, design of feedback loops and PWM DC-DC converter control schemes; and semiconductor devices such as silicon, silicon carbide and gallium nitride. Meeting the standards required by industrial employers, the lab manual combines programming language with a simulation tool designed for proficiency in the theoretical and practical concepts. Students and instructors can choose from an extensive list of topics involving simulations on MATLAB, SABER, or SPICE-based platforms, enabling readers to gain the most out of the prelab, inlab, and postlab activities. The laboratory exercises have been taught and continuously improved for over 25 years by Marian K. Kazimierczuk thanks to constructive student feedback and valuable suggestions on possible workroom improvements. This up-to-date and informative teaching material is now available for the benefit of a wide audience. Key features: Includes complete designs to give students a quick overview of the converters, their characteristics, and fundamental analysis of operation. Compatible with any programming tool (MATLAB, Mathematica, or Maple) and any circuit simulation tool (PSpice, LTSpice, Synopsys SABER, PLECS, etc.). Quick design section enables students and instructors to verify their design methodology for instant simulations. Presents lab exercises based on the most recent advancements in power electronics, including multiple-output power converters, modeling, current- and voltage-mode control schemes, and power semiconductor devices. Provides comprehensive appendices to aid basic understanding of the fundamental circuits, programming and simulation tools. Contains a quick component selection list of power MOSFETs and diodes together with their ratings, important specifications and Spice models.

Design and Implementation of Voltage Source Converters in HVDC Systems

Author : Nagwa F. Ibrahim
Publisher : Springer Nature
ISBN 13 : 303051661X
Total Pages : 131 pages
Book Rating : 4.0/5 (35 download)

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Book Synopsis Design and Implementation of Voltage Source Converters in HVDC Systems by : Nagwa F. Ibrahim

Download or read book Design and Implementation of Voltage Source Converters in HVDC Systems written by Nagwa F. Ibrahim and published by Springer Nature. This book was released on 2020-09-12 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book looks at the control of voltage source converter based high voltage direct current (VSC-HVDC). The objective is to understand the control structure of the VSC-HVDC system and establish the tuning criteria for the proportional-integral (PI) control of the converter controllers. Coverage includes modeling of the VSC-based HVDC transmission system using MATLAB and Simulink simulation package; implementation of control strategies for the VSC-based HVDC transmission system; and analysis of the developed system behavior under different conditions (normal and fault conditions). The book provides researchers, students, and engineers working in electrical power system transmission and power electronics and control in power transmission with a good understanding of the VSC-based HVDC transmission system concept and its behavior.

Multilevel Converters: Analysis, Modulation, Topologies, and Applications

Author : Gabriele Grandi
Publisher : MDPI
ISBN 13 : 3039214810
Total Pages : 548 pages
Book Rating : 4.0/5 (392 download)

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Book Synopsis Multilevel Converters: Analysis, Modulation, Topologies, and Applications by : Gabriele Grandi

Download or read book Multilevel Converters: Analysis, Modulation, Topologies, and Applications written by Gabriele Grandi and published by MDPI. This book was released on 2019-10-14 with total page 548 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is a collection of scientific papers concerning multilevel inverters examined from different points of view. Many applications are considered, such as renewable energy interface, power conditioning systems, electric drives, and chargers for electric vehicles. Different topologies have been examined in both new configurations and well-established structures, introducing novel and particular modulation strategies, and examining the effect of modulation techniques on voltage and current harmonics and the total harmonic distortion.