Frequency Dependent Hybrid Equivalents Of Large Networks
DOWNLOAD
Download Frequency Dependent Hybrid Equivalents Of Large Networks PDF/ePub or read online books in Mobi eBooks. Click Download or Read Online button to get Frequency Dependent Hybrid Equivalents Of Large Networks book now. This website allows unlimited access to, at the time of writing, more than 1.5 million titles, including hundreds of thousands of titles in various foreign languages. If the content not found or just blank you must refresh this page
Frequency Dependent Hybrid Equivalents Of Large Networks
DOWNLOAD
Author : Mohamed Abdel-Aziz Hassan Abdel-Rahman
language : en
Publisher:
Release Date : 2001
Frequency Dependent Hybrid Equivalents Of Large Networks written by Mohamed Abdel-Aziz Hassan Abdel-Rahman and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
For the digital time-domain analysis of electromagnetic transients in an interconnected power system, the system is artificially divided into two sections: (i) the study zone, in which the transient phenomenon occurs and where the component models must be represented in detail, including physical and mathematical nonlinearities, and (ii) the external system which encompasses the rest of the network, and due to its electrical distance to the location of the transient phenomenon, can be represented by a linear network in the whole frequency range of interest. This thesis develops a new methodology to obtain a frequency dependent equivalent for an external network. The main motivation behind development of an equivalent for the external system is to minimize computation resources, i.e., CPU time and memory, for the analysis of realistic size systems. The required computational resources are the bottleneck in real-time simulation and application of off-line software packages for the analysis of high-frequency electromagnetic transients. The salient feature of the proposed approach, as compared with the other methods for deducing external network equivalent, is that it provides a simpler model (lower-order mathematical model) with the required accuracy. Furthermore, the proposed methodology ensures positive-realness of the equivalent. The proposed equivalent is referred to as the hybrid equivalent since it relies on a combination of (i) simplified distributed line models and (ii) lumped element models, to generate a frequency response equivalent of the external system. This thesis also expands the proposed approach to develop a multi-port equivalent and to consider the impact of sources (generators and harmonic sources) on the equivalent. The proposed concept has been applied to a realistic size interconnected 500 kV study system to obtain a single-port and a two-port equivalent with respect to pre-specified observation points. The validity and accuracy of the proposed approach is verified based on comparing the simulation results with those obtained from the simulation of the original system using the ElectroMagnetic Transients Program (EMTP).
Frequency Dependent Hybrid Equivalents Of Large Networks
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
Frequency Dependent Hybrid Equivalents Of Large Networks written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
Frequency Dependent Hybrid Equivalents Of Large Networks Microform
DOWNLOAD
Author : Mohamed Abdel-Aziz Hassan Abdel-Rahman
language : en
Publisher: National Library of Canada = Bibliothèque nationale du Canada
Release Date : 2001
Frequency Dependent Hybrid Equivalents Of Large Networks Microform written by Mohamed Abdel-Aziz Hassan Abdel-Rahman and has been published by National Library of Canada = Bibliothèque nationale du Canada this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with categories.
A Network Synthesis Based Approach For Frequency Dependent Network Equivalents
DOWNLOAD
Author : Meysam Ahmadi
language : en
Publisher:
Release Date : 2021
A Network Synthesis Based Approach For Frequency Dependent Network Equivalents written by Meysam Ahmadi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021 with categories.
Transient simulation of large electric power systems is resource-intensive and it is often prohibitive to model the entire network in the simulator. To save computational resources, only a part of the network is modelled in detail and the remainder is modelled as an equivalent from the point of connection. To derive this equivalent, a frequency scan of the network portion is obtained either through measurements made on the actual network or via measurements on a highly detailed simulation model; and stored as a table of frequency versus impedance (magnitude and phase). Such a model is called a Frequency Dependent Network Equivalent (FDNE). Using curve-fitting, the frequency scan is fitted by a rational function, which can then readily be converted into a time-domain simulation model. Using the FDNE instead of modelling a whole network in detail, greatly reduces the computer simulation time, which is critical, and reduces the cost of computing resources particularly in real-time simulators. One of the major challenges in the current state of the art in implementing FDNEs is that the fitted rational function is often not passive. In other words, the model generates energy in some ranges of frequencies which may lead to instability in the simulation. In this work, a new method is explored to go directly from the frequency scan (tabulated function) to the time domain model without fitting the response by rational functions. In this technique, using network realization methods, an electric network made up of RLC branches and ideal transformers are used to fit the response while preserving the passivity of the network. Brune's realization method for the single-port network and Tellegen's extension for multi-port networks are adapted to implement numerically on tabulated functions. The most desirable feature of these techniques is that the realized network is always passive. So, unlike the current methods, there is no possibility whatsoever of violation of passivity in the resulted network.
Power System Harmonics
DOWNLOAD
Author : Jos Arrillaga
language : en
Publisher: John Wiley & Sons
Release Date : 2004-06-25
Power System Harmonics written by Jos Arrillaga and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004-06-25 with Technology & Engineering categories.
Harmonic distortion problems include equipment overheating, motor failures, capacitor failure and inaccurate power metering. The topic of power system harmonics was covered for the first time 20 years ago and the first edition has become a standard reference work in this area. Unprecedented developments in power electronic devices and their integration at all levels in the power system require a new look at the causes and effects of these problems, and the state of hardware and software available for harmonic assessment. Following the successful first edition, this second edition of Power System Harmonics maintains the practical approach to the subject and discusses the impact of advanced power electronic technology on instrumentation, simulation, standards and active harmonic elimination techniques. Features include: A new chapter on modern digital instrumentation techniques. Added sections on active filters and modern distorting devices such as FACTS devices, multilevel conversion, current source, voltage source inverters and turn-OFF-related power electronic devices. References to international standards for harmonics and inter-harmonics. Numerical examples of technique application. Offering a comprehensive understanding of power systems, this book is an asset to power engineers involved in the planning, design and operation of power system generation, transmission and distribution. Researchers and postgraduate students in the field will also benefit from this useful reference.
Frequency Dependent Network Equivalents For Ac Power Systems
DOWNLOAD
Author : Awad I. Ibrahim
language : en
Publisher:
Release Date : 1995
Frequency Dependent Network Equivalents For Ac Power Systems written by Awad I. Ibrahim and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with categories.
Advancements In Real Time Simulation Of Power And Energy Systems
DOWNLOAD
Author : Panos Kotsampopoulos
language : en
Publisher: MDPI
Release Date : 2021-05-20
Advancements In Real Time Simulation Of Power And Energy Systems written by Panos Kotsampopoulos and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-05-20 with Technology & Engineering categories.
Modern power and energy systems are characterized by the wide integration of distributed generation, storage and electric vehicles, adoption of ICT solutions, and interconnection of different energy carriers and consumer engagement, posing new challenges and creating new opportunities. Advanced testing and validation methods are needed to efficiently validate power equipment and controls in the contemporary complex environment and support the transition to a cleaner and sustainable energy system. Real-time hardware-in-the-loop (HIL) simulation has proven to be an effective method for validating and de-risking power system equipment in highly realistic, flexible, and repeatable conditions. Controller hardware-in-the-loop (CHIL) and power hardware-in-the-loop (PHIL) are the two main HIL simulation methods used in industry and academia that contribute to system-level testing enhancement by exploiting the flexibility of digital simulations in testing actual controllers and power equipment. This book addresses recent advances in real-time HIL simulation in several domains (also in new and promising areas), including technique improvements to promote its wider use. It is composed of 14 papers dealing with advances in HIL testing of power electronic converters, power system protection, modeling for real-time digital simulation, co-simulation, geographically distributed HIL, and multiphysics HIL, among other topics.
The Design Of Modern Microwave Oscillators For Wireless Applications
DOWNLOAD
Author : Ulrich L. Rohde
language : en
Publisher: John Wiley & Sons
Release Date : 2005-05-27
The Design Of Modern Microwave Oscillators For Wireless Applications written by Ulrich L. Rohde and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005-05-27 with Technology & Engineering categories.
Delivering the best possible solution for phase noise and outputpower efficiency in oscillators This complete and thorough analysis of microwave oscillatorsinvestigates all aspects of design, with particular emphasis onoperating conditions, choice of resonators and transistors, phasenoise, and output power. It covers both bipolar transistors andFETs. Following the authors' guidance, readers learn how to designmicrowave oscillators and VCOs that can be tuned over a very widefrequency range, yet have good phase noise, are low cost, and aresmall in size. All the essential topics in oscillator design anddevelopment are covered, including: * Device and resonator technology * Study of noise sources * Analysis methods * Design, calculation, and optimization methodologies * Practical design of single and coupled oscillators While most of the current literature in the field concentrates onclassic design strategies based on measurements, simulation, andoptimization of output power and phase noise, this text offers aunique approach that focuses on the complete understanding of thedesign process. The material demonstrates important design rulesstarting with the selection of best oscillator topology, choice oftransistors, and complete phase noise analysis that leads tooptimum performance of all relevant oscillator features. Alsoincluded are CMOS oscillators, which recently have become importantin cellular applications. For readers interested in specializedapplications and topics, a full chapter provides all the necessaryreferences. The contents of the text fall into two major categories: * Chapters 1 through 9 deal with a very detailed and expandedsingle resonator oscillator, including a thorough treatment of bothnonlinear analysis and phase noise * Chapters 10 and 11 use the knowledge obtained and apply it tomultiple coupled oscillators (synchronized oscillators) This text is partially based on research sponsored by the DefenseAdvanced Research Projects Agency (DARPA) and the United StatesArmy and conducted by Synergy Microwave Corporation. With thewealth of information provided for the analysis and practicaldesign of single and synchronized low-noise microwave oscillators,it is recommended reading for all RF microwave engineers. Inaddition, the text's comprehensive, step-by-step approach makes itan excellent graduate-level textbook.
American Doctoral Dissertations
DOWNLOAD
Author :
language : en
Publisher:
Release Date : 2001
American Doctoral Dissertations written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Dissertation abstracts categories.
Electrimacs 2022
DOWNLOAD
Author : Serge Pierfederici
language : en
Publisher: Springer Nature
Release Date :
Electrimacs 2022 written by Serge Pierfederici and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on with categories.