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Author: Amin Jafarian Publisher: ISBN: Category : Languages : en Pages : 130
Book Description
A central feature of wireless networks is multiple users sharing a common medium. Cellular systems are among the most common examples of such networks. The main phenomenon resulting from this inter-user interaction is interference, and thus analyzing interference networks is critical to determine the capacity of wireless networks. The capacity region of an interference network is defined as the set of rates that the users can simultaneously achieve while ensuring arbitrarily small probability of decoding error. It is an inherently hard problem to find the capacity region of interference networks. Even the capacity region of a general 2-user interference channel is a prominent open problem in information theory. This work's goal is to derive achievable regions that are improved over known results, and when possible, capacity theorems, for K user interference networks. Another multiuser channel that is commonly found in wireless systems is a broadcast channel. Broadcast channels stand side by side with Interference channels as the two of the most important channels for which capacity results are still not completely known. In this work we develop inner and outer bounds on the capacity region of fading broadcast channels, using which we find a part of the capacity region under some conditions. In summary, this work first presents coding arguments for new achievable rate regions and, where possible, capacity results for K-user interference networks. Second, it provides inner and outer-bounds for a class of fading broadcast channels.
Author: Amin Jafarian Publisher: ISBN: Category : Languages : en Pages : 130
Book Description
A central feature of wireless networks is multiple users sharing a common medium. Cellular systems are among the most common examples of such networks. The main phenomenon resulting from this inter-user interaction is interference, and thus analyzing interference networks is critical to determine the capacity of wireless networks. The capacity region of an interference network is defined as the set of rates that the users can simultaneously achieve while ensuring arbitrarily small probability of decoding error. It is an inherently hard problem to find the capacity region of interference networks. Even the capacity region of a general 2-user interference channel is a prominent open problem in information theory. This work's goal is to derive achievable regions that are improved over known results, and when possible, capacity theorems, for K user interference networks. Another multiuser channel that is commonly found in wireless systems is a broadcast channel. Broadcast channels stand side by side with Interference channels as the two of the most important channels for which capacity results are still not completely known. In this work we develop inner and outer bounds on the capacity region of fading broadcast channels, using which we find a part of the capacity region under some conditions. In summary, this work first presents coding arguments for new achievable rate regions and, where possible, capacity results for K-user interference networks. Second, it provides inner and outer-bounds for a class of fading broadcast channels.
Author: Imre Csiszár Publisher: Elsevier ISBN: 1483281574 Category : Mathematics Languages : en Pages : 465
Book Description
Information Theory: Coding Theorems for Discrete Memoryless Systems presents mathematical models that involve independent random variables with finite range. This three-chapter text specifically describes the characteristic phenomena of information theory. Chapter 1 deals with information measures in simple coding problems, with emphasis on some formal properties of Shannon’s information and the non-block source coding. Chapter 2 describes the properties and practical aspects of the two-terminal systems. This chapter also examines the noisy channel coding problem, the computation of channel capacity, and the arbitrarily varying channels. Chapter 3 looks into the theory and practicality of multi-terminal systems. This book is intended primarily for graduate students and research workers in mathematics, electrical engineering, and computer science.
Author: Nilanjan Chaudhuri Publisher: John Wiley & Sons ISBN: 1118729102 Category : Technology & Engineering Languages : en Pages : 289
Book Description
A generic DC grid model that is compatible with the standard AC system stability model is presented and used to analyse the interaction between the DC grid and the host AC systems. A multi-terminal DC (MTDC) grid interconnecting multiple AC systems and offshore energy sources (e.g. wind farms) across the nations and continents would allow effective sharing of intermittent renewable resources and open market operation for secure and cost-effective supply of electricity. However, such DC grids are unprecedented with no operational experience. Despite lots of discussions and specific visions for setting up such MTDC grids particularly in Europe, none has yet been realized in practice due to two major technical barriers: Lack of proper understanding about the interaction between a MTDC grid and the surrounding AC systems. Commercial unavailability of efficient DC side fault current interruption technology for conventional voltage sourced converter systems This book addresses the first issue in details by presenting a comprehensive modeling, analysis and control design framework. Possible methodologies for autonomous power sharing and exchange of frequency support across a MTDC grid and their impact on overall stability is covered. An overview of the state-of-the-art, challenges and on-going research and development initiatives for DC side fault current interruption is also presented.
Author: Amirnaser Yazdani Publisher: John Wiley & Sons ISBN: 0470551569 Category : Technology & Engineering Languages : en Pages : 473
Book Description
Presents Fundamentals of Modeling, Analysis, and Control of Electric Power Converters for Power System Applications Electronic (static) power conversion has gained widespread acceptance in power systems applications; electronic power converters are increasingly employed for power conversion and conditioning, compensation, and active filtering. This book presents the fundamentals for analysis and control of a specific class of high-power electronic converters—the three-phase voltage-sourced converter (VSC). Voltage-Sourced Converters in Power Systems provides a necessary and unprecedented link between the principles of operation and the applications of voltage-sourced converters. The book: Describes various functions that the VSC can perform in electric power systems Covers a wide range of applications of the VSC in electric power systems—including wind power conversion systems Adopts a systematic approach to the modeling and control design problems Illustrates the control design procedures and expected performance based on a comprehensive set of examples and digital computer time-domain simulation studies This comprehensive text presents effective techniques for mathematical modeling and control design, and helps readers understand the procedures and analysis steps. Detailed simulation case studies are included to highlight the salient points and verify the designs. Voltage-Sourced Converters in Power Systems is an ideal reference for senior undergraduate and graduate students in power engineering programs, practicing engineers who deal with grid integration and operation of distributed energy resource units, design engineers, and researchers in the area of electric power generation, transmission, distribution, and utilization.
Author: Dirk Van Hertem Publisher: John Wiley & Sons ISBN: 111911523X Category : Technology & Engineering Languages : en Pages : 589
Book Description
This book discusses HVDC grids based on multi-terminal voltage-source converters (VSC), which is suitable for the connection of offshore wind farms and a possible solution for a continent wide overlay grid. HVDC Grids: For Offshore and Supergrid of the Future begins by introducing and analyzing the motivations and energy policy drives for developing offshore grids and the European Supergrid. HVDC transmission technology and offshore equipment are described in the second part of the book. The third part of the book discusses how HVDC grids can be developed and integrated in the existing power system. The fourth part of the book focuses on HVDC grid integration, in studies, for different time domains of electric power systems. The book concludes by discussing developments of advanced control methods and control devices for enabling DC grids. Presents the technology of the future offshore and HVDC grid Explains how offshore and HVDC grids can be integrated in the existing power system Provides the required models to analyse the different time domains of power system studies: from steady-state to electromagnetic transients This book is intended for power system engineers and academics with an interest in HVDC or power systems, and policy makers. The book also provides a solid background for researchers working with VSC-HVDC technologies, power electronic devices, offshore wind farm integration, and DC grid protection.
Author: Roni Irnawan Publisher: Springer Nature ISBN: 3030274888 Category : Technology & Engineering Languages : en Pages : 209
Book Description
This book discusses novel methods for planning and coordinating converters when an existing point-to-point (PtP) HVDC link is expanded into a multi-terminal HVDC (MTDC) system. It demonstrates that expanding an existing PtP HVDC link is the best way to build an MTDC system, and is especially a better option than the build-from-scratch approach in cases where several voltage-sourced converter (VSC) HVDC links are already in operation. The book reports in detail on the approaches used to estimate the new steady-state operation limits of the expanded system and examines the factors influencing them, revealing new operation limits in the process. Further, the book explains how to coordinate the converters to stay within the limits after there has been a disturbance in the system. In closing, it describes the current DC grid control concept, including how to implement it in an MTDC system, and introduces a new DC grid control layer, the primary control interface (IFC).
Author: Ian Kayne Publisher: StudyExam4Less ISBN: 0976799294 Category : Computers Languages : en Pages : 787
Book Description
The A+ 4 Real book is written and presented by World Class Subject Matter Experts from Around The World! Frederick Carr, Gudrun Funk, Phil Hopkins, Tcat Houser, Ian Kayne, Milan Kosanovic, George P.Lister, James Pyles, Maxim Ratinov, Christine Schmied Any beliefs that the current CompTIA® A+ tests are easy are sadly mistaken. This work started as an update for the two ExamInsight books created by Tcat Houser, et al. The sheer size and page count of this work should be a hot tip that the A+ certification exams 220-301 and 220-302 are many things. The word easy does not fit the A+ Certification Test. Thanks to the Internet and hard working SUBJECT MATTER EXPERTS (SMEs), this work contains vast amounts of data about the A+ Certification Test and getting an A+ Certification online or offline. Think of this title as the missing link for the new A+ certification series. The nature of the new tests requires a new approach. A+ 4 REAL is the new approach. Written in a conversational style you interact with experts from the Pacific Northwest to Europe and beyond. This work was created for A+ Certification Training and the countless people who have done a reconnaissance mission on the Operating System test (220-302), and for those who dont want to follow in that path. The PC user who is trying to understand what is going on under the hood or is looking for some really good tricks and tips. A few chapters are included that are not required for the current A+ tests, and are very helpful in that bigger test called REAL LIFE. Therefore you are encouraged to pay close attention to the discussions on LINUX and MACINTOSH. The light-hearted work from your Safety SME enlightens you on protecting yourself from a fate worse than death. It has taken a great number of person-years to produce A+ 4 REAL. The SMES were given the freedom to write style. The end result is a work you wont want to put down. Features within the 787 pages: Missing Link for Success: Built to be "The Missing Link" for Success with A+ Certification 2003 objectives Hundreds of specific URL's: Approximately 250 live and clickable links will allow in depth research and knowledge building. Subject Matter Experts: Built by Subject Matter Experts (SME) in their field. Worldwide Input: Input and experience from a global community. Several "Real World" introductions chapters for Linux and Macintosh because they are growing user numbers and now are comparable in handling and use of the market leader. Full color pictures. Exactly = 478 Figures and 38 tables = 500+ visual display figures and explanation tables of the topics. Authors Freedom: authors had full freedom to bring in their real life experience issues and hands on help and tips to manage real life problems. Easy and Fun Reading
Author: Kamran Sharifabadi Publisher: John Wiley & Sons ISBN: 1118851528 Category : Science Languages : en Pages : 415
Book Description
Design, Control and Application of Modular Multilevel Converters for HVDC Transmission Systems is a comprehensive guide to semiconductor technologies applicable for MMC design, component sizing control, modulation, and application of the MMC technology for HVDC transmission. Separated into three distinct parts, the first offers an overview of MMC technology, including information on converter component sizing, Control and Communication, Protection and Fault Management, and Generic Modelling and Simulation. The second covers the applications of MMC in offshore WPP, including planning, technical and economic requirements and optimization options, fault management, dynamic and transient stability. Finally, the third chapter explores the applications of MMC in HVDC transmission and Multi Terminal configurations, including Supergrids. Key features: Unique coverage of the offshore application and optimization of MMC-HVDC schemes for the export of offshore wind energy to the mainland. Comprehensive explanation of MMC application in HVDC and MTDC transmission technology. Detailed description of MMC components, control and modulation, different modeling approaches, converter dynamics under steady-state and fault contingencies including application and housing of MMC in HVDC schemes for onshore and offshore. Analysis of DC fault detection and protection technologies, system studies required for the integration of HVDC terminals to offshore wind power plants, and commissioning procedures for onshore and offshore HVDC terminals. A set of self-explanatory simulation models for HVDC test cases is available to download from the companion website. This book provides essential reading for graduate students and researchers, as well as field engineers and professionals who require an in-depth understanding of MMC technology.
Author: Amin Jafarian
Author: Amin Jafarian
Author: Imre Csiszár
Author: Lin Yun
Author: Nilanjan Chaudhuri
Author: Amirnaser Yazdani
Author: Dirk Van Hertem
Author: Roni Irnawan
Author: Ian Kayne
Author: Kamran Sharifabadi
Author: