Download or read book Wide area Oscillation Identification and Damping Control in Power Systems written by Chao Lu (Mechanical engineer) and published by . This book was released on 2018 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Low-frequency oscillation (LFO) is a phenomenon inherent to power systems and should be carefully considered and dampened to improve the dynamic stability of power systems. With the development of wide area synchronous phasor measurement technology, the measurement results of phasor measurement units (PMUs) and wide-area measurement system (WAMS) can be applied in system identification and the wide area damping controller design to suppress LFO. In this paper, the identification methods and controller design methods of wide area damping control are reviewed. The basic framework for the application of PMU/WAMS results in power system identification and control is introduced first. Both the output response identification and the input-output identification are introduced in the identification section. The offline controller design and adaptive controller design methods are introduced. Practical cases in China Southern Grid and China Central Grid are reviewed as engineering application examples.

Download or read book Wide area Oscillation Identification and Damping Control in Power Systems written by Chao Lu and published by Foundations and Trends (R) in Electric Energy Systems. This book was released on 2018-08-14 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable Transportation with Electric Vehicles investigates smart electric vehicle charging. It focuses jointly on the quality of service for EV users and the stability and reliability of the power grid. It lays out a solution framework that addresses many of the key problems arising from both the lower and upper levels.

Download or read book Power System Oscillations written by Graham Rogers and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Power System Oscillations deals with the analysis and control of low frequency oscillations in the 0.2-3 Hz range, which are a characteristic of interconnected power systems. Small variations in system load excite the oscillations, which must be damped effectively to maintain secure and stable system operation. No warning is given for the occurrence of growing oscillations caused by oscillatory instability, since a change in the system's operating condition may cause the transition from stable to unstable. If not limited by nonlinearities, unstable oscillations may lead to rapid system collapse. Thus, it is difficult for operators to intervene manually to restore the system's stability. It follows that it is important to analyze a system's oscillatory behavior in order to understand the system's limits. If the limits imposed by oscillatory instability are too low, they may be increased by the installation of special stabilizing controls. Since the late 60s when this phenomena was first observed in North American systems, intensive research has resulted in design and installation of stabilizing controls known as power system stabilizers (PSS). The design, location and tuning of PSS require special analytical tools. This book addresses these questions in a modal analysis framework, with transient simulation as a measure of controlled system performance. After discussing the nature of the oscillations, the design of the PSS is discussed extensively using modal analysis and frequency response. In the scenario of the restructured power system, the performance of power system damping controls must be insensitive to parameter uncertainties. Power system stabilizers, when well tuned, are shown to be robust using the techniques of modern control theory. The design of damping controls, which operate through electronic power system devices (FACTS), is also discussed. There are many worked examples throughout the text. The Power System Toolbox© for use with MATLAB® is used to perform all of the analyses used in this book. The text is based on the author's experience of over 40 years as an engineer in the power industry and as an educator.

Download or read book Analysis and Damping Control of Power System Low frequency Oscillations written by Haifeng Wang and published by Springer. This book was released on 2016-03-30 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents the research and development results on power systems oscillations in three categories of analytical methods. First is damping torque analysis which was proposed in 1960’s, further developed between 1980-1990, and widely used in industry. Second is modal analysis which developed between the 1980’s and 1990’s as the most powerful method. Finally the linearized equal-area criterion analysis that is proposed and developed recently. The book covers three main types of controllers: Power System Stabilizer (PSS), FACTS (Flexible AC Transmission Systems) stabilizer, and ESS (Energy Storage Systems) stabilizer. The book provides a systematic and detailed introduction on the subject as the reference for industry applications and academic research.

Download or read book Design of Wide area Damping Control Systems for Power System Low frequency Inter area Oscillations written by Yang Zhang and published by . This book was released on 2007 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Inter area Oscillations in Power Systems written by Arturo Roman Messina and published by Springer Science & Business Media. This book was released on 2009-04-21 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt: The study of complex dynamic processes governed by nonlinear and nonstationary characteristics is a problem of great importance in the analysis and control of power system oscillatory behavior. Power system dynamic processes are highly random, nonlinear to some extent, and intrinsically nonstationary even over short time intervals as in the case of severe transient oscillations in which switching events and control actions interact in a complex manner. Phenomena observed in power system oscillatory dynamics are diverse and complex. Measured ambient data are known to exhibit noisy, nonstationary fluctuations resulting primarily from small magnitude, random changes in load, driven by low-scale motions or nonlinear trends originating from slow control actions or changes in operating conditions. Forced oscillations resulting from major cascading events, on the other hand, may contain motions with a broad range of scales and can be highly nonlinear and time-varying. Prediction of temporal dynamics, with the ultimate application to real-time system monitoring, protection and control, remains a major research challenge due to the complexity of the driving dynamic and control processes operating on various temporal scales that can become dynamically involved. An understanding of system dynamics is critical for reliable inference of the underlying mechanisms in the observed oscillations and is needed for the development of effective wide-area measurement and control systems, and for improved operational reliability.

Download or read book Encyclopedia of Systems and Control written by John Baillieul and published by Springer. This book was released on 2015-07-29 with total page 1554 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Encyclopedia of Systems and Control collects a broad range of short expository articles that describe the current state of the art in the central topics of control and systems engineering as well as in many of the related fields in which control is an enabling technology. The editors have assembled the most comprehensive reference possible, and this has been greatly facilitated by the publisher’s commitment continuously to publish updates to the articles as they become available in the future. Although control engineering is now a mature discipline, it remains an area in which there is a great deal of research activity, and as new developments in both theory and applications become available, they will be included in the online version of the encyclopedia. A carefully chosen team of leading authorities in the field has written the well over 250 articles that comprise the work. The topics range from basic principles of feedback in servomechanisms to advanced topics such as the control of Boolean networks and evolutionary game theory. Because the content has been selected to reflect both foundational importance as well as subjects that are of current interest to the research and practitioner communities, a broad readership that includes students, application engineers, and research scientists will find material that is of interest.

Download or read book Power System Wide area Stability Analysis and Control written by Jing Ma and published by John Wiley & Sons. This book was released on 2018-05-10 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: An essential guide to the stability and control of power systems integrating large-scale renewable energy sources The rapid development of smart grids and the integration of large scale renewable energy have added daunting new layers of complexity to the long-standing problem of power system stability control. This book offers a systematic stochastic analysis of these nonlinear problems and provides comprehensive countermeasures to improve power system performance and control with large-scale, hybrid power systems. Power system stability analysis and control is by no means a new topic. But the integration of large scale renewable energy sources has added many new challenges which must be addressed, especially in the areas of time variance, time delay, and uncertainties. Robust, adaptive control strategies and countermeasures are the key to avoiding inadequate, excessive, or lost loads within hybrid power systems. Written by an internationally recognized innovator in the field this book describes the latest theory and methods for handling power system angle stability within power networks. Dr. Jing Ma analyzes and provides control strategies for large scale power systems and outlines state-of-the-art solutions to the entire range of challenges facing today’s power systems engineers. Features nonlinear, stochastic analysis of power system stability and control Offers proven countermeasures to optimizing power system performance Focuses on nonlinear time-variance, long time-delays, high uncertainties and comprehensive countermeasures Emphasizes methods for analyzing and addressing time variance and delay when integrating large-scale renewable energy Includes rigorous algorithms and simulations for the design of analysis and control modeling Power System Wide-area Stability Analysis and Control is must-reading for researchers studying power system stability analysis and control, engineers working on power system dynamics and stability, and graduate students in electrical engineering interested in the burgeoning field of smart, wide-area power systems.

Download or read book Interconnected Power Systems written by Yong Li and published by Springer. This book was released on 2015-12-23 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book reports on the latest findings in the application of the wide area measurement systems (WAMS) in the analysis and control of power systems. The book collects new research ideas and achievements including a delay-dependent robust design method, a wide area robust coordination strategy, a hybrid assessment and choice method for wide area signals, a free-weighting matrices method and its application, as well as the online identification methods for low-frequency oscillations. The main original research results of this book are a comprehensive summary of the authors’ latest six-year study. The book will be of interest to academic researchers, R&D engineers and graduate students in power systems who wish to learn the core principles, methods, algorithms, and applications of the WAMS.

Download or read book Wide Area Power Systems Stability Protection and Security written by Hassan Haes Alhelou and published by Springer Nature. This book was released on 2020-09-21 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book proposes new control and protection schemes to improve the overall stability and security of future wide-area power systems. It focuses on the high penetration levels of renewable energy sources and distributed generation, particularly with the trend towards smart grids. The control methods discussed can improve the overall stability in normal and abnormal operation conditions, while the protection methods presented can be used to ensure the secure operation of systems under most severe contingencies. Presenting stability, security, and protection methods for power systems in one concise volume, this book takes the reader on a journey from concepts and fundamentals to the latest and future trends in each topic covered, making it an informative and intriguing read for researchers, graduate students, and practitioners alike.

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.

Download or read book Power System Monitoring and Control written by Hassan Bevrani and published by John Wiley & Sons. This book was released on 2014-06-09 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: POWER SYSTEM MONITORING AND CONTROL An invaluable resource for addressing the myriad critical technical engineering considerations in modern electric power system design and operation Power System Monitoring and Control (PSMC) is becoming increasingly significant in the design, planning, and operation of modern electric power systems. In response to the existing challenge of integrating advanced metering, computation, communication, and control into appropriate levels of PSMC, Power System Monitoring and Control presents a comprehensive overview of the basic principles and key technologies for the monitoring, protection, and control of contemporary wide-area power systems. A variety of topical issues are addressed, including renewable energy sources, smart grids, wide area stabilizing, coordinated voltage regulation and angle oscillation damping—as well as the advantages of phasor measurement units (PMUs) and global positioning system (GPS) time signal. Analysis and synthesis examples, along with case studies, add depth and clarity to all topics. Provides an up-to-date and comprehensive reference for researchers and engineers working on wide-area PSMC Links fundamental concepts of PSMC, advanced metering and control theory/techniques, and practical engineering considerations Covers PSMC problem understanding, design, practical aspects, and topics such as smart grid and coordinated angle oscillation damping and voltage regulation Incorporates the authors’ experiences teaching and researching in international locales including Japan, Singapore, Malaysia, and Australia Power System Monitoring and Control is ideally suited for a graduate course on this topic. It is also a practical reference for researchers and professional engineers working in power system monitoring, dynamic stability and control.

Download or read book Robust Control in Power Systems written by Bikash Pal and published by Springer Science & Business Media. This book was released on 2006-07-02 with total page 207 pages. Available in PDF, EPUB and Kindle. Book excerpt: Robust Control in Power Systems deals with the applications of new techniques in linear system theory to control low frequency oscillations in power systems. The book specifically focuses on the analysis and damping of inter-area oscillations in the systems which are in the range of 0.2-1 Hz. The damping control action is injected through high power electronic devices known as flexible AC transmission system (FACTS) controllers. Three commonly used FACTS controllers: controllable series capacitors (CSCs) controllable phase shifters (CPSs) and static var compensators (SVCs) have been used in this book to control the inter-area oscillations. The overview of linear system theory from the perspective of power system control is explained through examples. The damping control design is formulated as norm optimization problem. The H_infinity, H2 norm of properly defined transfer functions are minimized in linear matrix inequalities (LMI) framework to obtain desired performance and stability robustness. Both centralized and decentralized control structures are used. Usually the transmission of feedback signal from a remote location encounters delays making it difficult to control the system. Smith predictor based approach has been successfully explored in this book as a solution to such a problem. Robust Control in Power Systems will be valuable to academicians in the areas of power, control and system theory, as well as professionals in the power industry.

Download or read book Data Anomaly Resilience in Wide area Oscillation Monitoring and Assessment of Damping Contribution from Power System Components written by Kaustav Chatterjee and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In bulk power systems, sustained low-frequency oscillations may appear due to the poorly-damped natural modes or as a result of external periodic disturbances. The poorly-damped modal oscillations may come from increased loading over tie-lines, improper tuning of controllers, and fast-acting generator excitation systems, among others. Such oscillations induce mechanical stress on the turbines, limit utilization of existing transmission assets causing congestion, and in the worst case, if not adequately damped, may lead to large-scale outages. An important first-step in preventing these is to detect the poorly-damped oscillations through mode meters and identify the sources contributing towards the deterioration of the system damping. This necessitates a system-wide monitoring system, which can quantify the mode-wise damping contribution from different power system components in real-time using the GPS time-synchronized voltage and current measurements obtained by phasor measurement units (PMUs). However, owing to the chances of corruption in PMU channels arising out of bad data outliers, missing data packets, and malicious injections from cyber attacks, the accuracy and reliability of the oscillation monitoring system may be compromised. This highlights the need for a data pre-processor to be a part of the monitoring system for online detection and correction of anomalies in the PMU data streams. Thus motivated, this dissertation presents the theoretical foundations and approaches for bad data resilience in wide-area oscillation monitoring with focus on quantifying mode-wise relative damping contributions from synchronous generators and power electronics-interfaced transmission devices. First, an online data pre-processing approach is proposed for ensuring data anomaly resilience. The proposed data pre-processor is capable of detecting outliers and other bad data in measurements; separating event-induced outliers, like fault outliers, from bad data outliers; and recovering true data from anomalous measurements using a fast online algorithm. The proposed approach leverages the spatio-temporal correlation and low-rankness of the true data and premises on the assumption that data anomalies are spatially sparse. The theoretical guarantees on the success of data recovery, in presence of any bad data with a given sparsity, are also derived. In this context, analytical connections are established between the denseness of a signal group and their modal observabilities. It is shown that grouping signals by minimizing variance in the modal observabilities for each poorly-damped mode, enhances denseness of the low-rank signal subspace and helps attaining the sufficiency condition that guarantees data recovery. Next, the theories and methods for assessing damping contribution from different power system components using the output of the pre-processor are presented. To that end, the synchronous generators, forming the bulk of today's generation systems, are analyzed first. Intuitively, the rate of dissipation of modal energy in a device gives a measure of the device's ability to damp the mode. However, without detailed knowledge of the generator model and network parameters, in a multimachine system, it is difficult to estimate the expressions of energy functions and their rates of dissipation. To circumvent this, for each generator it is proposed to estimate the damping power for the mode of interest, by estimating the relative modeshapes of damping torque and rotor speed from the measurements of real power output and bus voltage angle, respectively. To support this proposition, a mathematical proof showing the mode-wise equality of damping power and average rates of oscillation energy dissipation in a multimachine system is presented. For estimation, a recursive Kalman filter-based approach is proposed. In a power system, damping contribution may also come from the transmission systems with active power electronics-interfaced devices. With that in mind, the rates of dissipation of oscillation energy in the flexible ac transmission systems (FACTS) and voltage source converter-based high voltage dc (VSC-HVDC) transmission systems are also studied. For each of these devices, their damping contributions are assessed by comparing the average slopes of their transient energy expressions constructed from terminal measurements, for different control strategies and controller parameters. The operating scenarios under which these devices could worsen the overall damping by injecting oscillation energy into the rest of the system, are presented. Finally, the design conditions for enhancing dissipativity of the energy functions are also suggested. In the end, a real-time laboratory testbed is presented for running control-hardware-in-loop experiments relating to data anomaly resilience and oscillation monitoring. The testbed, built so far as a part of this doctoral research, comprises of two real-time digital simulators from RTDS and OPAL-RT, and a hardware PMU, a GPS-clock, and a real-time automation controller from SEL. A few of the algorithms presented in the thesis, have been simulated in the testbed for validating their real-time performance.

Download or read book Power System Monitoring and Control written by Hassan Bevrani and published by John Wiley & Sons. This book was released on 2014-05-19 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: POWER SYSTEM MONITORING AND CONTROL An invaluable resource for addressing the myriad critical technical engineering considerations in modern electric power system design and operation Power System Monitoring and Control (PSMC) is becoming increasingly significant in the design, planning, and operation of modern electric power systems. In response to the existing challenge of integrating advanced metering, computation, communication, and control into appropriate levels of PSMC, Power System Monitoring and Control presents a comprehensive overview of the basic principles and key technologies for the monitoring, protection, and control of contemporary wide-area power systems. A variety of topical issues are addressed, including renewable energy sources, smart grids, wide area stabilizing, coordinated voltage regulation and angle oscillation damping—as well as the advantages of phasor measurement units (PMUs) and global positioning system (GPS) time signal. Analysis and synthesis examples, along with case studies, add depth and clarity to all topics. Provides an up-to-date and comprehensive reference for researchers and engineers working on wide-area PSMC Links fundamental concepts of PSMC, advanced metering and control theory/techniques, and practical engineering considerations Covers PSMC problem understanding, design, practical aspects, and topics such as smart grid and coordinated angle oscillation damping and voltage regulation Incorporates the authors’ experiences teaching and researching in international locales including Japan, Singapore, Malaysia, and Australia Power System Monitoring and Control is ideally suited for a graduate course on this topic. It is also a practical reference for researchers and professional engineers working in power system monitoring, dynamic stability and control.

Download or read book Power System Grid Operation Using Synchrophasor Technology written by Sarma (NDR) Nuthalapati and published by Springer. This book was released on 2018-05-29 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book brings together successful stories of deployment of synchrophasor technology in managing the power grid. The authors discuss experiences with large scale deployment of Phasor Measurement Units (PMUs) in power systems across the world, enabling readers to take this technology into control center operations and develop good operational procedures to manage the grid better, with wide area visualization tools using PMU data.

Download or read book Damping Controller Designs to Suppress Inter area Oscillations in Power Systems by Using Novel Eigenstructure based Indexes written by Deping Ke and published by . This book was released on 2012 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: Firstly, a tuning scheme is proposed to coordinate wide-area signals based PSSs and SDCs for FACTS devices to mitigate inter-area oscillations with optimal control efforts under multiple operating conditions. This involves minimizing of an eigenstructure-based index which measures the dynamic performance of inter-area oscillations and control efforts together. Here, PSSs and SDCs are simple controllers with structural constraints, for consideration their applications in practice. Besides, SDCs and PSSs are simultaneously tuned by another proposed two-stage optimization method named IAMO-PS where an inter-area mode oriented pole placement strategy is implemented for damping of inter-area oscillations in the first stage while control efforts measured by eigenstructure-based indexes are coordinated under the constraints of such pole placement in the second stage. Subsequently, it is emphasized in this thesis that wind turbines employing doubly fed induction generators (DFIGs) have to sacrifice their dynamic performance as they are controlled to suppress inter-area oscillations. Thereby, a dual-channel SDC is proposed and tuned to drive the DFIG to offer the required damping to inter-area modes by using the method of IAMO-PS with optimizing of weighted control efforts of active and reactive power modulation, measured by eigenstructure-based indexes. Consequently, the DFIG dynamics are apparently improved because of their tight relationship with the optimized power outputs. The effectiveness of the proposed eigenstructure-based indexes and the associated tuning methods are validated in the classic two-area systems and New England and New York interconnected systems.