A Study Of Small Signal Stability In Power Systems With Converters

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A Study of Small Signal Stability in Power Systems with Converters

Author : Alexander Duncan Giles
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis A Study of Small Signal Stability in Power Systems with Converters by : Alexander Duncan Giles

Download or read book A Study of Small Signal Stability in Power Systems with Converters written by Alexander Duncan Giles and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Future power systems will source much of their electrical power from converter-based generation,be it a large scale HVDC link or a smaller system such as the back-to-back converter systems found in modern, variable-speed wind turbines. This is in stark contrast to the original AC power systems which used directly-coupled synchronous generation. The transition from the past power system to the future power system will produce power systems that have both low inertia, which compromises angular and frequency stability, and low short-circuit ratios, which compromises voltage stability.In this thesis, the modelling and control of converter-based generation in low short-circuit ratio systems are investigated. For the modelling of AC power systems and the controllers being applied to the converter(s), the unified linear state-space approach is proposed. In this approach, linear state-space models of the electrical system are combined with linear state-space models in a manner which is highly scalable and sufficiently flexible to allow multiple control algorithms acting in a system instantaneously to be considered with relative ease. Three control algorithms are considered in single converter systems: dq-axis vector current control,proportional resonant control, and power synchronization control. By adopting dq-axis vector current control, the system becomes ill-conditioned at the current level, primarily due to the dynamics of the phase-locked loop, which then causes stability issues for outer feedback loops (for example DC voltage and AC voltage controllers) which accompany the current controller. Proportional resonant control, also employing a phase-locked loop, exhibits poor dynamics in the low short-circuit ratio power system. By mimicking the basic synchronization process of a synchronous generator, power synchronization control is able to perform satisfactorily in a low short-circuit ratio system, much as a synchronous generator can. Two algorithms are considered in the multi-converter, low short-circuit ratio systems: dq-axis vector current control and power synchronization control. Performance issues observed in single converter systems when dq-axis vector current control is applied are observed in the multi-converter systems. Additional sources of undesirable coupling between control loops at the current control level are observed, potentially placing more demands on the design of the outer control loops. Power synchronization control performs satisfactorily in the multi-converter systems; however, oscillatory behaviour does arise, which requires careful tuning of the controllers. In addition, it is shown that the introduction of converters using power synchronization control enables other converters (in the same system) using dq-axis vector current control to exhibit improved performance. This is due to power synchronization control causing a converter to act as an effective voltage source/regulator,and dq-axis vector current control relying on electrical proximity to a strong voltage source. This produces systems with improved conditioning, which will reduce the complexity of the design of outer controllers for dq-axis vector current controlled converters. Keywords: control, modelling, HVDC, power systems, stability, voltage-source converter, weak ACsystems, multiple-converter systems, power system planning.

Small-signal stability, control and dynamic performance of power systems

Author : M.J Gibbard
Publisher : University of Adelaide Press
ISBN 13 : 1925261034
Total Pages : 686 pages
Book Rating : 4.9/5 (252 download)

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Book Synopsis Small-signal stability, control and dynamic performance of power systems by : M.J Gibbard

Download or read book Small-signal stability, control and dynamic performance of power systems written by M.J Gibbard and published by University of Adelaide Press. This book was released on 2015-07-15 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: A thorough and exhaustive presentation of theoretical analysis and practical techniques for the small-signal analysis and control of large modern electric power systems as well as an assessment of their stability and damping performance.

Power System Small Signal Stability Analysis and Control

Author : Debasish Mondal
Publisher : Academic Press
ISBN 13 : 0128177691
Total Pages : 420 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Power System Small Signal Stability Analysis and Control by : Debasish Mondal

Download or read book Power System Small Signal Stability Analysis and Control written by Debasish Mondal and published by Academic Press. This book was released on 2020-02-20 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power System Small Signal Stability Analysis and Control, Second Edition analyzes severe outages due to the sustained growth of small signal oscillations in modern interconnected power systems. This fully revised edition addresses the continued expansion of power systems and the rapid upgrade to smart grid technologies that call for the implementation of robust and optimal controls. With a new chapter on MATLAB programs, this book describes how the application of power system damping controllers such as Power System Stabilizers and Flexible Alternating Current Transmission System controllers—namely Static Var Compensator and Thyristor Controlled Series Compensator —can guard against system disruptions. Detailed mathematical derivations, illustrated case studies, the application of soft computation techniques, designs of robust controllers, and end-of-chapter exercises make it a useful resource to researchers, practicing engineers, and post-graduates in electrical engineering. Considers power system small signal stability and provides various techniques to mitigate it Offers a new and straightforward method of finding the optimal location of PSS in a multi-machine power system Includes MATLAB programs and simulations for practical applications

A Study of Small-signal Stability of Multi-machine Power Systems

Author : Wenzhi Chen
Publisher :
ISBN 13 :
Total Pages : 256 pages
Book Rating : 4.:/5 (74 download)

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Book Synopsis A Study of Small-signal Stability of Multi-machine Power Systems by : Wenzhi Chen

Download or read book A Study of Small-signal Stability of Multi-machine Power Systems written by Wenzhi Chen and published by . This book was released on 1995 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Small-Signal Stability Analysis of Power Systems Integrated with Variable Speed Wind Generators

Author : Wenjuan Du
Publisher : Springer
ISBN 13 : 3319941682
Total Pages : 354 pages
Book Rating : 4.3/5 (199 download)

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Book Synopsis Small-Signal Stability Analysis of Power Systems Integrated with Variable Speed Wind Generators by : Wenjuan Du

Download or read book Small-Signal Stability Analysis of Power Systems Integrated with Variable Speed Wind Generators written by Wenjuan Du and published by Springer. This book was released on 2018-09-03 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reviews and examines how power system low-frequency power oscillations and sub-synchronous oscillations may be affected by grid connection of wind power generation. Grid connection of wind power generation affects the power system small-signal stability and has been one of the most actively pursued research subjects in power systems and power electronics engineering in the last ten years. This book is the first of its kind to cover the impact of wind power generation on power system low-frequency oscillations and sub-synchronous oscillations. It begins with a comprehensive overview of the subject and progresses to modeling of power systems and introduces the application of conventional methods, including damping torque analysis, modal analysis and frequency-domain analysis, presented with detailed examples, making it useful for researchers and engineers worldwide.

Grid Integration and Dynamic Impact of Wind Energy

Author : Vijay Vittal
Publisher : Springer Science & Business Media
ISBN 13 : 1441993231
Total Pages : 153 pages
Book Rating : 4.4/5 (419 download)

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Book Synopsis Grid Integration and Dynamic Impact of Wind Energy by : Vijay Vittal

Download or read book Grid Integration and Dynamic Impact of Wind Energy written by Vijay Vittal and published by Springer Science & Business Media. This book was released on 2012-07-23 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grid Integration and Dynamic Impact of Wind Energy details the integration of wind energy resources to the electric grid worldwide. Authors Vijay Vittal and Raja Ayyanar include detailed coverage of the power converters and control used in interfacing electric machines and power converters used in wind generators, and extensive descriptions of power systems operation and control to accommodate large penetration of wind resources. Key concepts will be illustrated through extensive power electronics and power systems simulations using software like MATLAB, Simulink and PLECS. The book addresses real world problems and solutions in the area of grid integration of wind resources, and will be a valuable resource for engineers and researchers working in renewable energy and power.

Oscillatory Stability of Converter-Dominated Power Systems

Author : Xiaorong Xie
Publisher : Springer Nature
ISBN 13 : 3031533577
Total Pages : 251 pages
Book Rating : 4.0/5 (315 download)

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Book Synopsis Oscillatory Stability of Converter-Dominated Power Systems by : Xiaorong Xie

Download or read book Oscillatory Stability of Converter-Dominated Power Systems written by Xiaorong Xie and published by Springer Nature. This book was released on with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Small-signal Stability, Transient Stability and Voltage Regulation Enhancement of Power Systems with Distributed Renewable Energy Resources

Download Small-signal Stability, Transient Stability and Voltage Regulation Enhancement of Power Systems with Distributed Renewable Energy Resources PDF Online Free

Author : Adirak Kanchanaharuthai
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (932 download)

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Book Synopsis Small-signal Stability, Transient Stability and Voltage Regulation Enhancement of Power Systems with Distributed Renewable Energy Resources by : Adirak Kanchanaharuthai

Download or read book Small-signal Stability, Transient Stability and Voltage Regulation Enhancement of Power Systems with Distributed Renewable Energy Resources written by Adirak Kanchanaharuthai and published by . This book was released on 2012 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: The environmental and economic impact of fossil fuel generating plants has resulted in the need to find more efficient and clean sources of electricity power generation. As an alternative, promising power generation options such as renewable energy sources, especially wind energy, are receiving increased interest. This dissertation addresses some important problems in power system operations (stability and power quality) when renewable energy resources (generation and storage) are integrated into the conventional power system. In particular, the use of energy storage (STATCOM/Battery) to enhance the small-signal stability, transient stability, and voltage regulation of an electrical power system with renewable power generation is investigated as follows. 1) A linearized model of the nonlinear power system in the region of a steady-state operating point is used in conjunction with an LMI-based control design method, including D-stability, to achieve small-signal angle and frequency stability, voltage regulation, when the system is perturbed by changes in mechanical power inputs to the synchronous generators in the system. 2) A nonlinear model of the power systems with energy storage is used with an Interconnection and Damping Assignment-Passivity-Based Control design (IDA-PBC) framework to achieve transient power angle stability along with frequency and voltage regulation after the occurrence of a large disturbance (a symmetrical three-phase short circuit transmission line fault). 3) Using the combination of the IDA-PBC control law and a reduced-order nonlinear observer, voltage regulation and system stability enhancement are simultaneously accomplished following both temporary and permanent faults. To illustrate the effectiveness of the STATCOM/Battery to enhance small-signal and transient stability, the LMI-based controller design with D-stability and IDA-PBC controller design are validated using the following simulation studies: (1) a single machine infinite bus (SMIB) (2) a two-machine (synchronous generator and doubly-fed induction generator) connected to an infinite bus. For the small-signal case, simulation results show that the proposed controller can simultaneously achieve frequency and voltage regulation along with improved transient performance. For the large-signal case, the results show that the proposed controller provides improved critical clearing times (CCTs) and an enlarged domain of attraction (DOA) along with improved frequency and voltage regulation.

Voltage-Sourced Converters in Power Systems

Author : Amirnaser Yazdani
Publisher : John Wiley & Sons
ISBN 13 : 0470551569
Total Pages : 473 pages
Book Rating : 4.4/5 (75 download)

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Book Synopsis Voltage-Sourced Converters in Power Systems by : Amirnaser Yazdani

Download or read book Voltage-Sourced Converters in Power Systems written by Amirnaser Yazdani and published by John Wiley & Sons. This book was released on 2010-03-25 with total page 473 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.

Stability Analysis of Power-Converter-Dominated Microgrid

Author :
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (137 download)

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Book Synopsis Stability Analysis of Power-Converter-Dominated Microgrid by :

Download or read book Stability Analysis of Power-Converter-Dominated Microgrid written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power systems are going through a paradigm shift from electric machine-based to power electronics-based, with a huge number of different players on the supply side. Nowadays, thousands of distributed energy resources (DERs) are being integrated into power systems through power electronics components such as solar panels, wind turbines, and energy storage systems; however, the integration of numerous power electronic components and constant power loads (CPLs) destabilizes power systems and leads to critical oscillations. Consequently, one of the crucial challenges of this new paradigm is to keep the whole power system stable. The stability issues faced by DC microgrids are especially severe and urgent due to their unique properties. First, the low inertia of DC microgrids sharply weakens their stability; and second, owing to their advantage of smooth control, DC microgrids are unprecedentedly more promising than AC power systems given the increasing penetration of DERs. Therefore, the main purpose of this research is to solve the stability issues in power-converter-dominated DC microgrids. Considering the limited applicable ranges of traditional small-signal stability analysis, this research develops stability analysis of power-converter-dominated DC microgrids from the perspective of large-signal stability analysis. The main contributions of this research can be summarized as follows: 1) We model the DC microgrids with high penetration of power electronic devices and CPLs based on Brayton-Moser's potential theory, including a proposed novel current-mode controller of power converters and a more realistic model of CPL. 2) We present a rigorous derivation of sufficient criteria for large-signal stability in DC microgrids with multiple power converters and CPLs. It is worth mentioning that this derivation works for many different types of power converters. In this research, the stability of each equilibrium point and the convergence of state trajectories with different starting points are discussed in detail. We integrate the discussion of the local stability of each equilibrium point into the large-signal stability analysis of the system. 3) We develop a novel approach to ROA estimation with less conservativeness using a potential-based approach. The approach tackles the common conflict between model accuracy of ROA estimation and computational overhead. 4) We resolve misunderstandings and emphasize the key points of potential theory, which plays a fundamental role in large-signal stability analysis in nonlinear power grids. Additionally, this dissertation develops a preliminary study about the microgrid control and voltage stability in AC/DC hybrid microgrids in Chapter 5, which investigates the control techniques, simulation modeling, and voltage stability analysis when a DC microgrid is connected to an AC microgrid. We will extend the preliminary study from the perspectives of stability-aware power flow management, fault detection, and grid protection in our future work.

ביאור על ספר הלכות גדולות

Author : שמואל צבי ואין
Publisher :
ISBN 13 :
Total Pages : 498 pages
Book Rating : 4.:/5 (219 download)

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Book Synopsis ביאור על ספר הלכות גדולות by : שמואל צבי ואין

Download or read book ביאור על ספר הלכות גדולות written by שמואל צבי ואין and published by . This book was released on 19?? with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Small-Signal Stability Modelling and Optimization of Microgrids

Author : Simon Eberlein
Publisher : BoD – Books on Demand
ISBN 13 : 3754338676
Total Pages : 250 pages
Book Rating : 4.7/5 (543 download)

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Book Synopsis Small-Signal Stability Modelling and Optimization of Microgrids by : Simon Eberlein

Download or read book Small-Signal Stability Modelling and Optimization of Microgrids written by Simon Eberlein and published by BoD – Books on Demand. This book was released on 2021-08-31 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stability of power systems and microgrids is compromised by the increasing penetration with power electronic devices, such as wind turbines, photovoltaics and batteries. A simulation and optimization environment for such low-inertia systems is created. It is investigated how accurate the models need to be to capture the prevailing modes. An evolutionary algorithm tailored to optimization problems with computationally intensive fitness evaluation is proposed in order to optimized the controller parameters of grid-forming and grid-supporting distributed generators. It becomes apparent that microgrids dominated by grid-forming inverters are very stable systems when well-designed and optimized controllers are used. Model simplifications, such as the neglect of inner control loops of inverters, must be examined carefully, as they can lead to an inaccurate stability assessment.

Flexible Control of Electrical Power System to Enhance Small Signal Stability

Author : Qun Gu
Publisher :
ISBN 13 :
Total Pages : 232 pages
Book Rating : 4.:/5 (564 download)

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Book Synopsis Flexible Control of Electrical Power System to Enhance Small Signal Stability by : Qun Gu

Download or read book Flexible Control of Electrical Power System to Enhance Small Signal Stability written by Qun Gu and published by . This book was released on 2004 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Power System Small Signal Stability Analysis and Control

Author : Debasish Mondal
Publisher : Academic Press
ISBN 13 : 0128177683
Total Pages : 420 pages
Book Rating : 4.1/5 (281 download)

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Book Synopsis Power System Small Signal Stability Analysis and Control by : Debasish Mondal

Download or read book Power System Small Signal Stability Analysis and Control written by Debasish Mondal and published by Academic Press. This book was released on 2020-02 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power System Small Signal Stability Analysis and Control, Second Edition analyzes severe outages due to the sustained growth of small signal oscillations in modern interconnected power systems. This fully revised edition addresses the continued expansion of power systems and the rapid upgrade to smart grid technologies that call for the implementation of robust and optimal controls. With a new chapter on MATLAB programs, this book describes how the application of power system damping controllers such as Power System Stabilizers and Flexible Alternating Current Transmission System controllers-namely Static Var Compensator and Thyristor Controlled Series Compensator -can guard against system disruptions. Detailed mathematical derivations, illustrated case studies, the application of soft computation techniques, designs of robust controllers, and end-of-chapter exercises make it a useful resource to researchers, practicing engineers, and post-graduates in electrical engineering. Considers power system small signal stability and provides various techniques to mitigate it Offers a new and straightforward method of finding the optimal location of PSS in a multi-machine power system Includes MATLAB programs and simulations for practical applications

Power System Dynamics and Stability

Author : Peter W. Sauer
Publisher :
ISBN 13 :
Total Pages : 376 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Power System Dynamics and Stability by : Peter W. Sauer

Download or read book Power System Dynamics and Stability written by Peter W. Sauer and published by . This book was released on 1998 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: For a one-semester senior or beginning graduate level course in power system dynamics. This text begins with the fundamental laws for basic devices and systems in a mathematical modeling context. It includes systematic derivations of standard synchronous machine models with their fundamental controls. These individual models are interconnected for system analysis and simulation. Singular perturbation is used to derive and explain reduced-order models.

Switch-Mode Power Converters

Author : Keng C. Wu
Publisher : Elsevier
ISBN 13 : 0080459560
Total Pages : 409 pages
Book Rating : 4.0/5 (84 download)

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Book Synopsis Switch-Mode Power Converters by : Keng C. Wu

Download or read book Switch-Mode Power Converters written by Keng C. Wu and published by Elsevier. This book was released on 2005-12-01 with total page 409 pages. Available in PDF, EPUB and Kindle. Book excerpt: Switch-Mode Power Converters introduces an innovative, highly analytical approach to symbolic, closed-form solutions for switched-mode power converter circuits. This is a highly relevant topic to power electronics students and professionals who are involved in the design and analysis of electrical power converters. The author uses extensive equations to explain how solid-state switches convert electrical voltages from one level to another, so that electronic devices (e.g., audio speakers, CD players, DVD players, etc.) can use different voltages more effectively to perform their various functions. Most existing comparable books published as recently as 2002 do not discuss closed-loop operations, nor do they provide either DC closed-loop regulation equations or AC loop gain (stability) formulae. The author Wu, a leading engineer at Lockheed Martin, fills this gap and provides among the first descriptions of how error amplifiers are designed in conjunction with closed-loop bandwidth selection. BENEFIT TO THE READER: Readers will gain a mathematically rigorous introduction to numerous, closed-form solutions that are readily applicable to the design and development of various switch-mode power converters. Provides symbolic, closed-form solutions for DC and AC studies Provides techniques for expressing close-loop operation Gives readers the ability to perform closed-loop regulation and sensitivity studies Gives readers the ability to design error amplifiers with precision Employs the concept of the continuity of states in matrix form Gives accelerated time-domain, steady-state studies using Laplace transform Gives accelerated time-domain studies using state transition Extensive use of matrix, linear algebra, implicit functions, and Jacobian determinants Enables the determination of power stage gain that otherwise could not be obtained

Power Stability Intelligent Control for Converter

Author : Vengadachalam N
Publisher : Self Publisher
ISBN 13 : 9781835800850
Total Pages : 0 pages
Book Rating : 4.8/5 (8 download)

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Book Synopsis Power Stability Intelligent Control for Converter by : Vengadachalam N

Download or read book Power Stability Intelligent Control for Converter written by Vengadachalam N and published by Self Publisher. This book was released on 2024-02-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Power Stability Intelligent Control for Converter" is a comprehensive book that delves into the fundamental concepts and advanced techniques related to power stability and intelligent control in the context of converters. This authoritative guide covers a wide range of topics, including power electronics, control systems, stability analysis, and converter topologies, providing a holistic understanding of the subject matter. The book begins by exploring the essential principles of power conversion, voltage control, current control, and power quality, addressing issues such as power factor correction and harmonic distortion. It then delves into various control techniques employed in converters, such as pulse width modulation, hysteresis control, sliding mode control, predictive control, fuzzy control, neural network control, adaptive control, and robust control. Stability analysis takes center stage, as the book investigates stability criteria, small-signal analysis, large-signal stability, stability boundaries, stability margins, bifurcation analysis, and stability enhancement techniques. It also presents stability control strategies, assessment methods, optimization algorithms, and tools for stability analysis. The book emphasizes the importance of control performance, dynamic response, and transient behavior, providing guidelines for control loop design, stability analysis, and practical control techniques. It also addresses stability limits, control design principles, and the implementation of control systems. "Power Stability Intelligent Control for Converter" is an invaluable resource for researchers, engineers, and graduate students in the field of power electronics and control systems. It equips readers with the knowledge and tools to analyze, design, and optimize stable and intelligent control systems for converters, ultimately enabling the development of efficient and reliable power conversion technologies.