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Control Of Doubly Fed Induction Generators Under Asymmetrical Grid Conditions
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Book Synopsis Control of Doubly-fed Induction Generators Under Asymmetrical Grid Conditions by : Marlies Richter
Download or read book Control of Doubly-fed Induction Generators Under Asymmetrical Grid Conditions written by Marlies Richter and published by . This book was released on 2006 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: In den letzten Jahren ist die Zahl der Windkraftanlagen zur Gewinnung elektrischer Energie stetig gestiegen. Damit stieg auch der Einfluss der WKAs auf die Stabilität der Netze und die Elektroenergiequalität. Ein wichtiges Entwicklungsziel ist daher die Anpassung der Windkraftanlagen an aktuelle und zukünftige Netzanschlussbedingungen. Besonders wichtig ist das Verhalten der Anlagen während asymmetrischen Netzbedingungen und insbesondere während Fehlern. Ein Ziel besteht darin, die Anlage auch während Fehler im Netz weiterbetreiben zu können (keine Netztrennung) und andererseits die zusätzlichen Belastungen für die Anlage gering zu halten. - In Windkraftanlagen werden häufig doppelt gespeiste Asynchronmaschinen eingesetzt. Daher bestand das Ziel dieser Arbeit darin, die Regelung einer doppelt gespeisten Asynchronmaschine an asymmetrische Netzbedingungen anzupassen. Als erster Schritt wurden dabei nur geringe aber langdauernde Asymmetrien im Netz betrachtet. - Sowohl für die maschinen- wie auch für die netzseitige Regelung wurde eine Regelungsstruktur entwickelt. Diese beinhalten zusätzlich zu den konventionellen Reglern Regler für die Gegensystemströme. Diese zusätzlichen Regler entsprechen zusätzlichen Freiheitsgraden, mit denen weitere Regelungsziele erreicht werden können. Das Ziel der maschinenseitigen Regelung war die Verringerung von Schwingungen des elektrischen Drehmomentes während Asymmetrien. Das Ziel der netzseitigen Reglung war die Reduktion von Schwingungen der Zwischenkreisspannung. In Simulationen konnten beide Ziele erreicht werden. - Alle Simulationen wurden mit PSCAD/EMTDC durchgeführt.
Book Synopsis Contribution to the Control of Doubly-fed Induction Generators in Wind Power Plants with Particular Consideration of Asymmetrical Grid Conditions by : Marlies Richter
Download or read book Contribution to the Control of Doubly-fed Induction Generators in Wind Power Plants with Particular Consideration of Asymmetrical Grid Conditions written by Marlies Richter and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Die vorgelegte Arbeit stellt vier Verfahren für die Regelung der Umrichterströme einer doppelt-gespeisten Asynchronmaschine (DGASM) vor. Diese werden mit Hilfe von Simulationen mit Matlab/Simulink analysiert. Besondere Beachtung wird dabei dem Verhalten des Generators während unsymmetrischer Spannungseinbrüche im elektrischen Netz geschenkt. Die vorgestellten Regelungsverfahren haben zum Ziel Drehmoment- und Zwischenkreisspannungsschwingungen während solcher Fehlerfälle zu reduzieren und damit die zusätzlichen Belastungen des Systems zu verringern. Die feldorientierte Regelung (FOR) wird häufig zur Regelung von DGASMs in Windkraftanlagen eingesetzt und dient in dieser Arbeit als Vergleichsbasis. Die getrennte Regelung von Mit- und Gegensystemströmen in zwei entgegengesetzt rotierenden Koordinatensystemen wird im Rahmen der vorgelegten Arbeit als PN-Regelung (PNR) bezeichnet. Für diese Regelung werden vier PI-Regler verwendet. Im Gegensatz zur feldorientierten und zur PN-Regelung arbeitet die frequenzselektive Regelung (FSR) in einem ruhenden Koordinatensystem. In diesem werden die Umrichterströme als Wechselgrößen in alpha-beta-Komponenten geregelt. Die Kombination von frequenzselektiver und PN-Regelung ergibt die in dieser Arbeit als FS(PN)-Regelung bezeichnete Struktur, in der die Ströme ebenfalls in einem ruhenden Koordinatensystem als Wechselgrößen geregelt werden, wobei gezielt Sollwerte auch für die Gegensystemkomponenten vorgegeben werden. Sowohl theoretische Überlegungen als auch die durchgeführten Simulationen zeigen, dass die drei vorgeschlagenen alternativen Regelungsverfahren das Verhalten der DGASM während leichter Unsymmetrien verbessern können. Die möglichen Verbesserungen sind allerdings sowohl durch die vorhandene Hardware (Auslegung der Umrichter: maximal zulässige Ströme und Spannungen), durch die Regelungsverfahren selbst (zeitliche Verzögerungen durch die Berechnung der Mit- und Gegensystemkomponenten bei PN- und FS(PN)-Regelung) als auch durch Nichtlinearitäten des Systems (Sättigung der Hauptinduktivität der DGASM) begrenzt. Eine Anwendung der vorgestellten neuen Regelungsverfahren auf andere Probleme wie z.B. Photovoltaikwechselrichter oder Umrichter für Windkraftanlagen mit Vollumrichter erscheint dennoch vielversprechend.
Book Synopsis Control of a Wind Driven Doubly Fed Induction Generator During Grid Faults by : Mahmoud Mossa
Download or read book Control of a Wind Driven Doubly Fed Induction Generator During Grid Faults written by Mahmoud Mossa and published by GRIN Verlag. This book was released on 2013-02-06 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Master's Thesis from the year 2013 in the subject Engineering - Power Engineering, grade: none, , course: Electrical engineering (Renewable energy), language: English, abstract: Wind electrical power systems are recently getting lot of attention, because they are cost competitive, environmental clean and safe renewable power source, as compared with fossil fuel and nuclear power generation. A special type of induction generator, called a doubly fed induction generator (DFIG), is used extensively for high-power wind applications. They are used more and more in wind turbine applications due to ease controllability, high energy efficiency and improved power quality. This thesis aims to develop a method of a field orientation scheme for control both the active and reactive powers of a DFIG driven by a wind turbine.The proposed control system consists of a wind turbine that drives a DFIG connected to the utility grid through AC-DC-AC link. The main control objective is to regulate the dc link voltage for operation at maximum available wind power.This is achieved by controlling the and axes components of voltages and currents for both rotor side and line side converters using PI controllers. The complete dynamic model of the proposed system is described in detail. Computer simulations have been carried out in order to validate the effectiveness of the proposed system during the variation of wind speed. The results prove that , better overall performances are achieved, quick recover from wind speed disturbances in addition to good tracking ability. Generally, any abnormalities associated with grid asymmetrical faults are going to affect the system performance considerably. During grid faults, unbalanced currents cause negative effects like overheating problems and mechanical stress due to high torque pulsations that can damage the rotor shaft, gearbox or blade assembly. Therefore, the dynamic model of the DFIG, driven by a wind turbine during grid faults has been analyzed and developed using the method of symmetrical components. The dynamic performance of the DFIG during unbalanced grid conditions is analyzed and described in detail using digital simulations. A novel fault ride-through (FRT) capability is proposed (i.e. the ability of the power system to remain connected to the grid during faults) with suitable control strategy in this thesis. In this scheme, the input mechanical energy of the wind turbine during grid faults is stored and utilized at the moment of fault clearance, instead of being dissipated in the resistors of the crowbar circuit as in the existing FRT schemes. [...]
Book Synopsis Advanced Control of Doubly Fed Induction Generator for Wind Power Systems by : Dehong Xu
Download or read book Advanced Control of Doubly Fed Induction Generator for Wind Power Systems written by Dehong Xu and published by John Wiley & Sons. This book was released on 2018-07-10 with total page 527 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the fundamental concepts and advanced modelling techniques of Doubly Fed Induction Generators accompanied by analyses and simulation results Filled with illustrations, problems, models, analyses, case studies, selected simulation and experimental results, Advanced Control of Doubly Fed Induction Generator for Wind Power Systems provides the basic concepts for modelling and controlling of Doubly Fed Induction Generator (DFIG) wind power systems and their power converters. It explores both the challenges and concerns of DFIG under a non-ideal grid and introduces the control strategies and effective operations performance options of DFIG under a non-ideal grid. Other topics of this book include thermal analysis of DFIG wind power converters under grid faults; implications of the DFIG test bench; advanced control of DFIG under harmonic distorted grid voltage, including multiple-loop and resonant control; modeling of DFIG and GSC under unbalanced grid voltage; the LFRT of DFIG, including the recurring faults ride through of DFIG; and more. In addition, this resource: Explores the challenges and concerns of Doubly Fed Induction Generators (DFIG) under non-ideal grid Discusses basic concepts of DFIG wind power system and vector control schemes of DFIG Introduces control strategies under a non-ideal grid Includes case studies and simulation and experimental results Advanced Control of Doubly Fed Induction Generator for Wind Power Systems is an ideal book for graduate students studying renewable energy and power electronics as well as for research and development engineers working with wind power converters.
Book Synopsis Control of Synchronized Doubly-fed Induction Generator Under Grid Conditions by : Nguyen Van Binh
Download or read book Control of Synchronized Doubly-fed Induction Generator Under Grid Conditions written by Nguyen Van Binh and published by . This book was released on 2015 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advanced Control of Doubly Fed Induction Generator for Wind Power Systems by : Dehong Xu
Download or read book Advanced Control of Doubly Fed Induction Generator for Wind Power Systems written by Dehong Xu and published by John Wiley & Sons. This book was released on 2018-08-14 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covers the fundamental concepts and advanced modelling techniques of Doubly Fed Induction Generators accompanied by analyses and simulation results Filled with illustrations, problems, models, analyses, case studies, selected simulation and experimental results, Advanced Control of Doubly Fed Induction Generator for Wind Power Systems provides the basic concepts for modelling and controlling of Doubly Fed Induction Generator (DFIG) wind power systems and their power converters. It explores both the challenges and concerns of DFIG under a non-ideal grid and introduces the control strategies and effective operations performance options of DFIG under a non-ideal grid. Other topics of this book include thermal analysis of DFIG wind power converters under grid faults; implications of the DFIG test bench; advanced control of DFIG under harmonic distorted grid voltage, including multiple-loop and resonant control; modeling of DFIG and GSC under unbalanced grid voltage; the LFRT of DFIG, including the recurring faults ride through of DFIG; and more. In addition, this resource: Explores the challenges and concerns of Doubly Fed Induction Generators (DFIG) under non-ideal grid Discusses basic concepts of DFIG wind power system and vector control schemes of DFIG Introduces control strategies under a non-ideal grid Includes case studies and simulation and experimental results Advanced Control of Doubly Fed Induction Generator for Wind Power Systems is an ideal book for graduate students studying renewable energy and power electronics as well as for research and development engineers working with wind power converters.
Book Synopsis Advances in Control Technologies for Brushless Doubly-fed Induction Generators by : Yi Liu
Download or read book Advances in Control Technologies for Brushless Doubly-fed Induction Generators written by Yi Liu and published by Springer Nature. This book was released on 2022-03-06 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents advances in control technologies for efficient operation of the brushless doubly-fed induction generator (BDFIG). For robust and low-cost operation of BDFIGs, it is required to keep high-quality output voltage and eliminate the speed/position encoder under different loads and operation conditions. Some advanced control technologies, from the authors’ latest work on these topics, are presented to achieve this goal with simple and accurate texts, illustrations, and tables. The qualified outcomes obtained from this book assure the high-performance operation of BDFIGs and also give the readers a straight insight toward challenges in this research area in the future.
Book Synopsis Doubly Fed Induction Machine by : Gonzalo Abad
Download or read book Doubly Fed Induction Machine written by Gonzalo Abad and published by John Wiley & Sons. This book was released on 2011-09-28 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be focused on the modeling and control of the DFIM based wind turbines. In the first part of the book, the mathematical description of different basic dynamic models of the DFIM will be carried out. It will be accompanied by a detailed steady-state analysis of the machine. After that, a more sophisticated model of the machine that considers grid disturbances, such as voltage dips and unbalances will be also studied. The second part of the book surveys the most relevant control strategies used for the DFIM when it operates at the wind energy generation application. The control techniques studied, range from standard solutions used by wind turbine manufacturers, to the last developments oriented to improve the behavior of high power wind turbines, as well as control and hardware based solutions to address different faulty scenarios of the grid. In addition, the standalone DFIM generation system will be also analyzed.
Book Synopsis Control Design and Analysis of Doubly-fed Induction Generator in Wind Power Application by : Shukul Mazari
Download or read book Control Design and Analysis of Doubly-fed Induction Generator in Wind Power Application written by Shukul Mazari and published by . This book was released on 2009 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: The work presented in this thesis includes control system design, analysis and grid synchronization of a DFIG (doubly-fed induction generator) driven by a wind turbine using stator-voltage and stator-flux oriented frames. The DFIG is a special type of induction machine which is comprised of two back-to-back converters. One converter connects the DFIG stator to the grid, and the second converter is connected to the rotor of the machine through a DC-link capacitor. In this work, DFIG steady-state and transient models have been created in the d-q reference frame. The steady-state model is used to obtain the relationship between the rotor d-q currents and stator real/reactive power references in a particular orientation frame. The transient model is used to develop the DFIG power control mechanisms. The wind turbine driving torque is modeled by considering typical wind turbine aerodynamic characteristics under variable wind and pitch angle conditions. Comparisons are made to evaluate the differences between DFIG current/power controller in stator-voltage and stator-flux oriented frames. A speed control system has been designed to analyze maximum energy extraction from a DFIG for a particular wind speed. Lastly, the grid synchronization control technique and synchronization method have been proposed as this system requires some care during the machine start-up and integration with the grid. The main aim of the synchronization control process is to avoid heavy start-up currents and mechanical stresses on the turbine shaft and other integrated components. This is achieved by properly matching the phase angle, frequency, and magnitude of the grid voltage and the stator induced voltage irrespective of whether it is a stator-voltage or stator-flux oriented frame used for modeling the generator. Instead of a traditional control scheme using a PLL (phase-locked loop), the rotor d-q reference current is generated with grid voltage as the reference so as to induce identical voltage in the stator as that of the grid. The machine is started by a driving torque and the switch between stator and the grid can be closed for synchronization. However, appropriate timing of switch closure plays a critical role in satisfying the magnitude condition of synchronization. Simulation models have been developed using Matlab®/Simulink® for a GE 1.5 MW generator.
Book Synopsis Consideration of the Effects of Symmetrical and Asymmetrical Voltage Dips in the Control and Operation of a Grid-connected Doubly-fed Induction Generator by : Khanyisani Godgoven Makhoba
Download or read book Consideration of the Effects of Symmetrical and Asymmetrical Voltage Dips in the Control and Operation of a Grid-connected Doubly-fed Induction Generator written by Khanyisani Godgoven Makhoba and published by . This book was released on 2020 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Control of Power Electronic Converters and Systems by : Frede Blaabjerg
Download or read book Control of Power Electronic Converters and Systems written by Frede Blaabjerg and published by Academic Press. This book was released on 2021-04-01 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of Power Electronic Converters and Systems, Volume 3, explores emerging topics in the control of power electronics and converters, including the theory behind control, and the practical operation, modeling, and control of basic power system models. This book introduces the most important controller design methods, including both analog and digital procedures. This reference explains the dynamic characterization of terminal behavior for converters, as well as preserving the stability and power quality of modern power systems. Useful for engineers in emerging applications of power electronic converters and those combining control design methods into different applications in power electronics technology. Addressing controller interactions - in light of increasing renewable energy integration and related challenges with stability and power quality - is becoming more frequent in power converters and passive components. Discusses different applications and their control in integrated renewable energy systems Introduces the most important controller design methods, both in analog and digital Describes different important applications to be used in future industrial products Explains the dynamic characterization of terminal behavior for converters
Book Synopsis Doubly Fed Induction Machine by : Gonzalo Abad
Download or read book Doubly Fed Induction Machine written by Gonzalo Abad and published by Wiley-IEEE Press. This book was released on 2011-11-01 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book will be focused on the modeling and control of the DFIM based wind turbines. In the first part of the book, the mathematical description of different basic dynamic models of the DFIM will be carried out. It will be accompanied by a detailed steady-state analysis of the machine. After that, a more sophisticated model of the machine that considers grid disturbances, such as voltage dips and unbalances will be also studied. The second part of the book surveys the most relevant control strategies used for the DFIM when it operates at the wind energy generation application. The control techniques studied, range from standard solutions used by wind turbine manufacturers, to the last developments oriented to improve the behavior of high power wind turbines, as well as control and hardware based solutions to address different faulty scenarios of the grid. In addition, the standalone DFIM generation system will be also analyzed.
Book Synopsis Variable Speed Generators by : Ion Boldea
Download or read book Variable Speed Generators written by Ion Boldea and published by CRC Press. This book was released on 2005-11-09 with total page 551 pages. Available in PDF, EPUB and Kindle. Book excerpt: Surveying the technologies used to satisfy the world's demand for open, efficient, and clean electricity, Variable Speed Generators provides an in-depth examination of variable-speed generators for both stand-alone and grid-connected applications. Part of The Electric Generators Handbook, Two-Volume Set, this work offers authoritative, tightly focused treatment of the topologies, steady state and transients modeling, performance, control, design, and testing of stand-alone and grid-connected generators operating at variable speeds. Variable Speed Generators thoroughly covers all types of variable-speed generators currently in progress in distributed generation and renewable energy applications around the world. It delves into the steady state, transients, control, and design of claw-pole rotor synchronous, induction, permanent magnet-assisted synchronous, and switched reluctance starter alternators for hybrid-electric vehicles. It also discusses PM synchronous, transverse-flux PM, and flux-reversal PM generators for low-speed wind and hydro energy conversion as well as linear-motion alternators for residential and spacecraft applications. Numerous design and control examples illustrate the discussion. The promise of renewable, sustainable energy rests on our ability to design innovative power systems that are able to harness energy from a variety of sources. Variable Speed Generators supplies the tools necessary to design, validate, and deploy the right power generation technologies to fulfill tomorrow's complex energy needs.
Book Synopsis A Novel Control Scheme for a Doubly-fed Induction Wind Generator Under Unblanced Grid Voltage Conditions by : Ted Kermit Anderson Brekken
Download or read book A Novel Control Scheme for a Doubly-fed Induction Wind Generator Under Unblanced Grid Voltage Conditions written by Ted Kermit Anderson Brekken and published by . This book was released on 2005 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sustainable Design and Build by : Md. Faruque Hossain
Download or read book Sustainable Design and Build written by Md. Faruque Hossain and published by Butterworth-Heinemann. This book was released on 2018-09-12 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Design and Build provides a complete reference for engineers and scientists who want to conduct sustainability research. The book begins with a rudimentary discussion of environmental pollution and energy that is followed by their applications for solving problems in construction processes and practices governing advanced building design, infrastructure and transportation, and water and sewage. Other topics include engineering invisible roads and bridges, smart building technology, building information modeling, energy modeling, resilience in urban and rural development, engineering invisible roads and bridges, zero emission vehicles and flying transportation technology. This book presents a valuable guide to sustainable design and construction processes and methods. - Covers the latest research in the utilization of renewable energy and the implementation in construction and building system design - Includes a detailed discussion on combined technology applications of energy, gas and water - Covers advanced methods and technologies for constructing sustainable transportation systems, including roads, bridges, tunnels and hardscapes
Book Synopsis Modeling and Analysis with Induction Generators, Third Edition by : M. Godoy Simões
Download or read book Modeling and Analysis with Induction Generators, Third Edition written by M. Godoy Simões and published by CRC Press. This book was released on 2014-12-11 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Now in its Third Edition, Alternative Energy Systems: Design and Analysis with Induction Generators has been renamed Modeling and Analysis with Induction Generators to convey the book’s primary objective—to present the fundamentals of and latest advances in the modeling and analysis of induction generators. New to the Third Edition Revised equations and mathematical modeling Addition of solved problems as well as suggested problems at the end of each chapter New modeling and simulation cases Mathematical modeling of the Magnus turbine to be used with induction generators Detailed comparison between the induction generators and their competitors Modeling and Analysis with Induction Generators, Third Edition aids in understanding the process of self-excitation, numerical analysis of stand-alone and multiple induction generators, requirements for optimized laboratory experimentation, application of modern vector control, optimization of power transference, use of doubly fed induction generators, computer-based simulations, and social and economic impacts.
Book Synopsis Advances in Systems, Control and Automation by : Avinash Konkani
Download or read book Advances in Systems, Control and Automation written by Avinash Konkani and published by Springer. This book was released on 2017-12-11 with total page 727 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book comprises the select proceedings of the ETAEERE 2016 conference. The book aims to shed light on different systems or machines along with their complex operation, behaviors, and linear–nonlinear relationship in different environments. It covers problems of multivariable control systems and provides the necessary background for performing research in the field of control and automation. Aimed at helping readers understand the classical and modern design of different intelligent automated systems, the book presents coverage on the control of linear and nonlinear systems, intelligent systems, stochastic control, knowledge-based systems applications, fault diagnosis and tolerant control, real-time control applications, etc. The contents of this volume will prove useful to researchers and professionals alike.
