Steady-state voltage stability assessment method

Steady-state voltage stability assessment method

Author:

Publisher:

Published: 1912

Total Pages:

ISBN-13:

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Atualmente os sistemas elétricos altamente carregados estão enfrentando um crescente risco de estabilidade de tensão na medida que restrições ambientais e incertezas econômicas limitam o investimento em novas linhas de transmissão. Uma revisão dos problemas ocorridos em vários países indicam claramente que o problema de estabilidade de tensão é real e que o pior ainda está por vir [1]. Portanto existe a necessidade do desenvolvimento de ferramentas analíticas capazes de prever o colapso de tensão em redes complexas. Estas ferramentas devem ser capazes de quantificar com precisão as margens de estabilidade e os limites de transferência de potência, identificando os pontos fracos e as áreas susceptíveis á estabilidade de tensão. Um método para determinação das condições de estabilidade local de tensão é mostrado. A eficiência computacional desta ferramenta analítica é enfatizada em estudos de análise de cotingência. Estudos comparativos mostram a influência do modelo da carga estática, dos equivalentes de redes e da representação dos limites de geração ou absorção de potência reativa a partir da curva de capabilidade da máquina síncrona, no índice que avalia a estabilidade local de tensão. Um estudo sobre o determinante da matriz que serve como índice que avalia a estabilidade local de tensão. Neste trabalho são propostos novos estudos para dar continuidade aos avanços obtidos até o momento.


Computational Techniques for Voltage Stability Assessment and Control

Computational Techniques for Voltage Stability Assessment and Control

Author: Venkataramana Ajjarapu

Publisher: Springer Science & Business Media

Published: 2007-05-27

Total Pages: 257

ISBN-13: 0387329358

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This book provides comprehensive details on continuation power flow, and reviews concepts in bifurcation theory and continuation methods for assessing power system voltage stability. The author proposes a uniform framework that provides computational approaches for both short-term and long-term voltage stability phenomena. Readers can access the author’s web-based simulation tools, which are based on the advice in this book, to simulate tests of systems up to the size of 200 busses.


Voltage Stability in Electrical Power Systems

Voltage Stability in Electrical Power Systems

Author: Farid Karbalaei

Publisher: John Wiley & Sons

Published: 2022-12-02

Total Pages: 292

ISBN-13: 1119830656

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Voltage Stability in Electrical Power Systems Explore critical topics and the latest research in voltage stability in electric power systems In Voltage Stability in Electrical Power Systems: Concepts, Assessment, and Methods for Improvement, three distinguished electrical engineers deliver a comprehensive discussion of voltage stability analysis in electrical power systems. The book discusses the concept of voltage stability, effective factors and devices, and suitable system modeling, offering readers an authoritative overview of the subject and strategies to prevent instability in power systems. The authors explore critical topics such as load and load tap changer (LTC) transformer modeling and the impact of distributed generation and transmission-distribution interactions on voltage stability. They also present practical methods to improve voltage stability. Readers will also find: Thorough introductions to voltage stability, effective factors and devices, and suitable systems modeling Comprehensive explorations of voltage stability assessment methods, including the continuation power flow methods and PV-curve fitting In-depth explorations of methods of improving voltage stability, including preventive and corrective methods Fulsome presentations of measurement-based indices and model-based indices of stability assessment Perfect for engineers and other professionals designing electric power systems, Voltage Stability in Electrical Power Systems: Concepts, Assessment, and Methods for Improvement will also earn a place in the libraries of graduate and senior undergraduate students with an interest in power systems.


Novel Advancements in Electrical Power Planning and Performance

Novel Advancements in Electrical Power Planning and Performance

Author: Shandilya, Smita

Publisher: IGI Global

Published: 2019-08-02

Total Pages: 388

ISBN-13: 1522585532

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As the demand for efficient energy sources continues to grow, electrical systems are becoming more essential to meet these increased needs. Electrical generation and transmission plans must remain cost-effective, reliable, and flexible for further future expansion. As these systems are being utilized more frequently, it becomes imperative to find ways of optimizing their overall function. Novel Advancements in Electrical Power Planning and Performance is an essential reference source that provides vital research on the specific challenges, issues, strategies, and solutions that are associated with electrical transmission and distribution systems and features emergent methods and research in the systemic and strategic planning of energy usage. Featuring research on topics such as probabilistic modeling, voltage stability, and radial distribution, this book is ideally designed for electrical engineers, practitioners, power plant managers, investors, industry professionals, researchers, academicians, and students seeking coverage on the methods and profitability of electrical expansion planning.


TIME-DOMAIN VOLTAGE STABILITY ASSESSMENT AND WIDE-AREA CONTROL

TIME-DOMAIN VOLTAGE STABILITY ASSESSMENT AND WIDE-AREA CONTROL

Author:

Publisher:

Published: 2017

Total Pages:

ISBN-13:

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Abstract : This dissertation proposes and develops an EMTP-based time-domain approach for voltage stability assessment. Steady-state approaches for voltage stability analysis use linearized equations based on power frequency phasor analysis using the Jacobian matrix of the power system. Using these conventional methods, nonlinearities and resultant harmonics are not addressed, nor are frequency-dependencies or natural responses to step-changes in the system. In order to implement this method all power system components need to be modeled in time-domain. Different load models and Var compensators have been developed in EMTP/ATP to conduct time-domain simulations. A Phasor Measurement Unit (PMU) model is also presented to provide a bridge between time and phasor domain analysis. Different case studies are shown in which time-domain analysis present the accurate results while steady state analysis include measurement and estimation errors. Furthermore, a new Voltage Stability Index (VSI) is developed to detect impending voltage instability. A proposed multi-criteria index is developed based on different sub-indices calculated by monitoring different parameters of power system. the multi-level feature of the proposed index enables us to closely monitor voltage stability status and implement appropriate remedial actions when needed and avoid unnecessary actions. Finally, the application of the proposed method and VSI in wide-area control and protection against voltage collapse is investigated. Novel wide-area control algorithms are developed based on voltage sensitivity analysis and the results for shunt capacitor and Static Var Compensator (SVC) control are compared to local-control strategies. It is shown that the voltage support provided by wide-area control strategy is more effective and will lead to a better voltage profile. The methods developed here can be directly implemented in smart grid infrastructure using a combination of synchrophasors and sampled values capabilities.


Voltage Stability of Electric Power Systems

Voltage Stability of Electric Power Systems

Author: Thierry van Cutsem

Publisher: Springer Science & Business Media

Published: 2007-11-27

Total Pages: 382

ISBN-13: 0387755365

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Voltage Stability is a relatively recent and challenging problem in Power Systems Engineering. It is gaining in importance as the trend of operating power systems closer to their limits continues to increase. Voltage Stability of Electric Power Systems presents a clear description of voltage instability and collapse phenomena. It proposes a uniform and coherent theoretical framework for analysis and covers state-of-the-art methods. The book describes practical methods that can be used for voltage security assessment and offers a variety of examples.


Mid-term Voltage Stability Assessment and Enhancement

Mid-term Voltage Stability Assessment and Enhancement

Author: Feng Dong

Publisher:

Published: 2004

Total Pages: 214

ISBN-13:

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"The main issues in this dissertation deal with mechanisms of voltage instability, on-line assessment of voltage stability by a quasi-steady state method, and voltage stability enhancement by reactive power reserve management and tertiary/secondary voltage control"--Abstract, leaf iii.


Real-Time Stability in Power Systems

Real-Time Stability in Power Systems

Author: Savu C. Savulescu

Publisher: Springer Science & Business Media

Published: 2006

Total Pages: 360

ISBN-13: 9780387256269

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In the aftermath of the wave of blackouts that affected US, UK and mainland Europe utilities in 2003 and 2004, renewed attention has been focused on maintaining the highest level of reliability and security in the operation of power systems. The lack of adequate transmission infrastructure as well as real-time tools aimed at detecting and alarming system conditions have also been highlighted. In this context, the need to assess stability and predict the risk of blackout in real-time has become particularly relevant. Early work in this field documented in technical papers published throughout the 1990s and early 2000s underlined the importance of performing stability assessment in real-time. While static security assessment is conceptually straightforward, innovative approaches are needed to combine it with dynamic security assessment to develop an overall scheme so that results can be used for on-line decision-making. On October 13, 2004, the IEEE Power Systems Conference and Exposition 2004 hosted the ‘Real-Time Stability Challenge’ panel session. Organized by the Power System Dynamic Performance Committee, the panel was a forum for presenting progress achieved in this field, discussing new ideas, and identifying the challenges to be met in the course of future research. Real-Time Stability in Power Systems: Techniques for Early Detection of the Risk of Blackout is built around most of the panel papers, updated and expanded by the authors with the new material relevant to the panel theme. The chapters are contributed by well known experts in the field, thus providing an authoritative reference on the theory and implementation of real-time stability assessment -- one of the critical topics of the day. Some of the issues discussed in the book include, but are not limited to: *Stability limits and how to objectively define them, *Techniques for defining and measuring the distance to instability, *The characterization of the risk of blackout, *Discussion of quick, approximate methods to filter out non-critical contingencies and do a detailed simulation only of those that result in limit violations, *Theoretical description and practical experience with real-time and/or near real-time stability applications available today in the SCADA/EMS industry.


Real-Time Stability Assessment in Modern Power System Control Centers

Real-Time Stability Assessment in Modern Power System Control Centers

Author: S. C. Savulescu

Publisher: John Wiley & Sons

Published: 2009-03-04

Total Pages: 455

ISBN-13: 0470423900

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This book answers the need for a practical, hands-on guide for assessing power stability in real time, rather than in offline simulations. Since the book is primarily geared toward the practical aspects of the subject, theoretical background is reduced to the strictest minimum. For the benefit of readers who may not be quite familiar with the underlying theoretical techniques, appendices describing key algorithms and theoretical issues are included at the end of the book. It is an excellent source for researchers, professionals, and advanced undergraduate and graduate students.


Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations

Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations

Author: Sarma (NDR) Nuthalapati

Publisher: Springer Nature

Published: 2021-05-28

Total Pages: 403

ISBN-13: 3030674827

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This book brings together real-world accounts of using voltage stability assessment (VSA) and transient stability assessment (TSA) tools for grid management. Chapters are written by leading experts in the field who have used these tools to manage their grids and can provide readers with a unique and international perspective. Case studies and success stories are presented by those who have used these tools in the field, making this book a useful reference for different utilities worldwide that are looking into implementing these tools, as well as students and practicing engineers who are interested in learning the real-time applications of VSA and TSA for grid operation.