[PDF] Static And Transient Voltage Stability Assessment Of Hybrid Ac Dc Power Systems eBook

Author : Minglan Lin
Publisher :
Page : pages
File Size : 16,69 MB
Release : 2010
Category : Electric currents, Alternating
ISBN :

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Voltage stability is a challenging problem in the design and operation of terrestrial and shipboard power systems. DC links can be integrated in the AC systems to increase the transmission capacity or to enhance the distribution performance. However, DC links introduce voltage stability issues related to the reactive power shortage due to power converters. Multi-infeed DC systems make this existing phenomenon more complicated. In addition, shipboard power systems have unique characteristics, and some concepts and methodologies developed for terrestrial power systems need to be investigated and modified before they are extended for shipboard power systems. One goal of this work was to develop a systematic method for voltage stability assessment of hybrid AC/DC systems, independent of system configuration. The static and dynamic approaches have been used as complementary methods to address different aspects in voltage stability. The other goal was to develop or to apply voltage stability indicators for voltage stability assessment. Two classical indicators (the minimum eigenvalue and loading margin) and an improvement (the 2nd order performance indicator) have been jointly used for the prediction of voltage stability, providing information on the system state and proximity to and mechanism of instability. The eliminated variable method has been introduced to calculate the partial derivatives of AC/DC systems for modal analysis. The previously mentioned methodologies and the associated indicators have been implemented for the application of integrated shipboard power system including DC zonal arrangement. The procedure of voltage stability assessment has been performed for three test systems, the WSCC 3-machine 9-bus system, the benchmark integrated shipboard power system, and the modified IEEE RTS-96. The static simulation results illustrate the critical location and the contributing factors to the voltage instability, and screen the critical contingencies for dynamic simulation. The results obtained from various static methods have been compared. The dynamic simulation results demonstrate the response of dynamic characteristics of system components, and benchmark the static simulation results.

Author : Sarma (NDR) Nuthalapati
Publisher : Springer Nature
Page : 403 pages
File Size : 10,11 MB
Release : 2021-05-28
Category : Technology & Engineering
ISBN : 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.

Author : S. C. Savulescu
Publisher : John Wiley & Sons
Page : 455 pages
File Size : 49,14 MB
Release : 2009-03-04
Category : Technology & Engineering
ISBN : 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.

Author : Mania Pavella
Publisher : Springer Science & Business Media
Page : 262 pages
File Size : 16,58 MB
Release : 2000-10-31
Category : Business & Economics
ISBN : 9780792379638

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Three Belgian researchers (U. of Liege) look at one unified approach to on-line dynamic security assessment and control to enable a power system to withstand unexpected contingencies without experiencing voltage or transient instabilities. The problem has greatly increased since deregulation, when utilities are being operated much closer to their limits in order to generate private profit. Their approach is called Single Machine Equivalent, SIME to its friends, and is a hybrid direct-temporal method that processes information about the system behavior in order to get one-shot stability assessment in the same way as direct methods. Preventative SIME relies on time-domain programs to get information about simulated stability scenarios of anticipated contingencies, and emergency SIME uses real-time measurements that take into account the actual occurrence of a contingency. Annotation copyrighted by Book News, Inc., Portland, OR

Author : Mohamed Ramadan Abdalaty Younis
Publisher :
Page : pages
File Size : 13,92 MB
Release : 2018
Category :
ISBN :

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This thesis develops a novel hybrid stability assessment method, i.e., combine both time-domain and direct stability methods, for assessment of stability subsequent to small and large-signal transients. The proposed assessment method uses the critical component energies instead of the total system energy to calculate the critical energy which extend the ability to include multi-swing stability analysis. The method can estimate the time to reach to instability in which the system reaches to an unstable equilibrium point (UEP) for small or large disturbances. A new index is proposed to detect the expected separation areas/islands and rank all components/disturbances in a power system based on their criticality. Also, a termination criterion is provided to minimize time-domain simulation runs and makes the proposed algorithm a feasible candidate for real-time/near-real-time online dynamic security assessment (DSA) applications. The proposed method requires a full direct stability model representation for the system elements. Due to lack of a detailed generator model and a HVDC model, a structure-preserving energy function (SPEF) with a sixth-order generator model and a detailed HVDC model is proposed. The proposed SPEF satisfies energy function conditions and is also applicable to lower order generator models, i.e., second-order and fourth-order models. Several time-domain simulation studies, presenting each energy function term, are demonstrated to demonstrate applicability and accuracy of the proposed energy function. The stability assessment method is demonstrated by examining four possible post-fault responses of the 68-bus, 16-machine IEEE benchmark system.

Author : Venkataramana Ajjarapu
Publisher : Springer Science & Business Media
Page : 257 pages
File Size : 33,55 MB
Release : 2007-05-27
Category : Technology & Engineering
ISBN : 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.

Author : Xinzhou Dong
Publisher : Springer Nature
Page : 338 pages
File Size : 35,46 MB
Release : 2022-10-15
Category : Technology & Engineering
ISBN : 9811964866

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System protection is laid between the defenses for power system protective relaying and the emergency control. Under the premise of ensuring the safety of electrical equipment, it strives to ensure the safety of the system, block the chain of occurrence and growth of cascading faults, and effectively avoid the occurrence of large-scale blackout catastrophes. This book systematically elaborates on the dealing technology of a special type of fault, the “cascading fault”, in the AC-DC hybrid large-scale power grid. The main contents include immunization distance protection for accident overload; distance protection that is immune to oscillation; inverter control technology to prevent long-term or continuous commutation failure; DC participation emergency power flow control technology used to share the accident transfer overload caused by inverter lockout; and overhead transmission line adaptive overload protection.The basis of English translation of this book from its Chinese original manuscript was done with the help of artificial intelligence (machine translation by the service provider DeepL.com). A subsequent human revision of the content was done by the author.

Author : J. Arrillaga
Publisher : IET
Page : 410 pages
File Size : 42,82 MB
Release : 1998
Category : Technology & Engineering
ISBN : 9780852969342

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A graduate-level textbook that can also serve as a reference for engineers and researchers working on problems in modern power systems. Emphasizes incorporating HVDC converters and systems into the analysis of power systems, but describes algorithms that can be extended to other industrial components such as drives and smelters and to the flexible AC transmission systems technology. Considers only system studies, influenced by steady-state or transient converter control; and not fast transients such as lightning. Annotation copyrighted by Book News, Inc., Portland, OR