Download or read book Synchrophasor Based Voltage Stability Assessment and Local Volt Var Control of Power Systems written by Xun Zhang and published by . This book was released on 2017 with total page 125 pages. Available in PDF, EPUB and Kindle. Book excerpt: Among several power system blackouts in recent decades, such as the events on July 2, 1996 in the western American system and August ?14?
Download or read book Voltage Stability Assessment and Control Based on Synchrophasor Measurements in Ambient Condition written by Sayed Mohammad Amelian and published by . This book was released on 2019 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: Voltage stability assessment and control are among the top priority tasks for electric utilities and power system operators. Failure in performing these correctly, has resulted in some of the major blackouts over the past few decades. Continuous loading increase on system infrastructure, higher reliability and security requirements, as well as progressive renewable resource integration, incapable of guaranteeing sustained reactive support, have all made this function more complex, and yet more crucial.Traditionally, developed algorithms for calculating voltage stability margin and recommending the necessary control action, rely on complete and accurate system models, as well as extensive offline studies. Investigating previous incidents has proved this to be a challenging goal to achieve. At the same time, integration of high-sampling measurement devices such as synchrophasors, powerful processors, and fast communication have resulted in increased situational awareness and monitoring quality of the system behavior. As a result, there is high interest today, to develop measurement-based real-time tools for determining system status from stability point of view and deduce the optimal control actions in critical conditions.In this dissertation, accurate modeling of the power system ambient data, corresponding to its operation at quasi steady-state condition is discussed, and the difference between system's steady-state response and power flow solutions is investigated. Based on this clarification, a new distributed model-free algorithm is proposed for voltage stability assessment and control of a power system, based on steady-state Q-V sensitivity of system buses. This is realized through subspace system identification from input-output response based on ambient measurements. Once the sensitivities are known, system proximity to voltage instability can be determined using the minimum sensitivity, rank system buses according to their stability margin and the need for corrective control actions, and determine the optimal set of actions needed to bring system operation point back to a secure state. To pursue the latter, two optimization approaches with different objectives based on various operating policies are introduced towards finding the best local control action within a substation. Finally, an index is introduced to determine vulnerability of the system to voltage instability caused by limitation on a generator's reactive power.
Download or read book Computational Techniques for Voltage Stability Assessment and Control written by Venkataramana Ajjarapu and published by Springer Science & Business Media. This book was released on 2007-05-27 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Synchrophasor Based Voltage Stability Monitoring and Control of Power Systems written by Saugata Swapan Biswas and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: With increasing loads, change in generation mix, environmental limitations on transmission system expansion and high competition amongst the power utilities, power systems are being pushed to voltage stability limits, thus increasing the chances of a voltage collapse that can lead to a blackout. Numerous voltage instability incidents occurring around the world in recent years have emphasized voltage stability studies during planning and operation of power systems. With the advent of synchrophasor technology, improved algorithms can be developed utilizing phasor measurements to efficiently monitor the voltage stability condition of a power system, thus enabling fast online control.
Download or read book Use of Voltage Stability Assessment and Transient Stability Assessment Tools in Grid Operations written by Sarma (NDR) Nuthalapati and published by Springer Nature. This book was released on 2021-05-28 with total page 403 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Real Time Voltage Stability Monitoring and Control Using Synchrophasors written by Xing Liu and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One new real-time Voltage Stability Monitoring framework and its corresponding Advanced Voltage Control scheme provide the possibility of improvement in voltage stability, security and control in power systems. They take full advantage of the new measurement method Synchrophasors in current bulk power system so that more accurate assessment and control action can be achieved in less time using complex information.
Download or read book TIME DOMAIN VOLTAGE STABILITY ASSESSMENT AND WIDE AREA CONTROL written by and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Real Time Stability Assessment in Modern Power System Control Centers written by S. C. Savulescu and published by John Wiley & Sons. This book was released on 2009-03-04 with total page 455 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Towards On line Voltage Stability Assessment Using Synchrophasors written by Himanshu Subandhu Hirlekar and published by . This book was released on 2011 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Voltage instability has become a growing concern in the operation of power systems in recent years. The reason is that power systems all over are being operated with reduced margins because of increased demand exacerbated by a general reluctance to invest in improvement of the electric grid infrastructure. Until recently it was difficult to predict voltage instability in the on-line environment. However, advances in technology has made possible the on-line monitoring and assessment of voltage stability. Synchrophasors is a relatively new technology in the field of power systems which allows system operators to monitor the system conditions at specific measurement locations of the network. Synchrophasors measure voltage and current phasors with accurate time stamping with respect to Global Positioning System (GPS) clock reference. Because of the accurate time stamping, it becomes possible to compare the phasors in time. A novel voltage stability prediction algorithm using synchrophasors is proposed in this thesis. Synchrophasor data is used to perform a fast state estimation of the system. This is a departure from conventional SCADA-based state estimation. The traditional method of VQ analysis for voltage stability is put to use in this algorithm to estimate the voltage stability margin. Since we are incorporating the synchrophasor information for which the data refresh rate is fast, the algorithm being developed is proposed for on-line stability assessment. The algorithm is tested on the CIGRE 10-bus system. The results are validated using the well-known modal analysis method"--Abstract, leaf iii.
Download or read book Real Time Stability in Power Systems written by Savu C. Savulescu and published by Springer. This book was released on 2014-07-10 with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pioneering volume has been updated and enriched to reflect the state-of-the-art in blackout prediction and prevention. It documents and explains background and algorithmic aspects of the most successful steady-state, transient and voltage stability solutions available today in real-time. It also describes new, cutting-edge stability applications of synchrophasor technology, and captures industry acceptance of metrics and visualization tools that quantify and monitor the distance to instability. Expert contributors review a broad spectrum of additionally available techniques, such as trajectory sensitivities, ensuring this volume remains the definitive resource for industry practitioners and academic researchers in this critical area of power system operations.
Download or read book Renewable Integrated Power System Stability and Control written by Hêmin Golpîra and published by John Wiley & Sons. This book was released on 2021-04-06 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: RENEWABLE INTEGRATED POWER SYSTEM STABILITY AND CONTROL Discover new challenges and hot topics in the field of penetrated power grids in this brand-new interdisciplinary resource Renewable Integrated Power System Stability and Control delivers a comprehensive exploration of penetrated grid dynamic analysis and new trends in power system modeling and dynamic equivalencing. The book summarizes long-term academic research outcomes and contributions and exploits the authors’ extensive practical experiences in power system dynamics and stability to offer readers an insightful analysis of modern power grid infrastructure. In addition to the basic principles of penetrated power system modeling, model reduction, and model derivation, the book discusses inertia challenge requirements and control levels, as well as recent advances in visualization of virtual synchronous generators and their associated effects on system performance. The physical constraints and engineering considerations of advanced control schemes are deliberated at length. Renewable Integrated Power System Stability and Control also considers robust and adaptive control strategies using real-time simulations and experimental studies. Readers will benefit from the inclusion of: A thorough introduction to power systems, including time horizon studies, structure, power generation options, energy storage systems, and microgrids An exploration of renewable integrated power grid modeling, including basic principles, host grid modeling, and grid-connected MG equivalent models A study of virtual inertia, including grid stability enhancement, simulations, and experimental results A discussion of renewable integrated power grid stability and control, including small signal stability assessment and the frequency point of view Perfect for engineers and operators in power grids, as well as academics studying the technology, Renewable Integrated Power System Stability and Control will also earn a place in the libraries of students in Electrical Engineering programs at the undergraduate and postgraduate levels who wish to improve their understanding of power system operation and control.
Download or read book Synchrophasor based State Estimation for Online Voltage Stability Monitoring in Power Systems written by Xinyun Lu and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Power distribution systems are faced with rising operational challenges and require continuous stability monitoring as the integration of renewable energy resources is increasing and the load demand is rapidly growing. In order to provide timely information about any impending grid problems to system operators, this thesis focuses on the analysis and monitoring of voltage stability on distribution system side. The implementation of synchrophasors in distribution systems enhances the situational awareness of the system. Synchrophasor measurement offers increased visibility, faster response time and more reliable state estimation, which provides a unique opportunity for developing new monitoring algorithms. This thesis proposes a voltage stability monitoring algorithm based on the synchrophasor-based linear state estimation method. Particularly, the voltage monitoring algorithm combines a set of early warning indicators with the BDS independence test (a statistical hypothesis test, after the initials of W. A. Brock, W. Dechert and J. Scheinkman). The early warning indicators are derived based on critical slowing down phenomenon in dynamical systems, and the BDS test serves as a diagnostic test to avoid false detections. The main advantage of the algorithm over other voltage stability indicators used in transmission side is that it can detect the onset of voltage instability in a faster and more accurate manner while avoiding false alarms when the system is still away from the stability boundary. Case studies conducted on a rural Quebec test feeder confirm the effectiveness of the proposed voltage stability monitoring algorithm. Reliable and fast detection of the proximity of the system states to voltage collapse conditions is achieved without false alarms." --
Download or read book Monitoring and Control using Synchrophasors in Power Systems with Renewables written by Innocent Kamwa and published by Institution of Engineering and Technology. This book was released on 2020-07-06 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: With the integration of more distributed or aggregated renewables, and the wide utilization of power electronic devices, modern power systems are facing new stability and security challenges, such as the weakly damped oscillation caused by wind farms connected through long distance transmission lines, the frequency stability problem induced by the reduction of inertia and the voltage stability issue resulting from the interactions between transmission systems and dynamic loads.
Download or read book Voltage Stability Analysis of Power System written by Yong Tang and published by . This book was released on 2021 with total page 385 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Voltage Stability and Security Assessment for Power Systems written by Antonios G. Costi and published by . This book was released on 1987 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Voltage Stability Assessment and Control of Power Systems Using Computational Intelligence written by Worawat Nakawiro and published by . This book was released on 2011 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Smart Grids written by David Bakken and published by CRC Press. This book was released on 2017-12-19 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: The utilization of sensors, communications, and computer technologies to create greater efficiency in the generation, transmission, distribution, and consumption of electricity will enable better management of the electric power system. As the use of smart grid technologies grows, utilities will be able to automate meter reading and billing and consumers will be more aware of their energy usage and the associated costs. The results will require utilities and their suppliers to develop new business models, strategies, and processes. With an emphasis on reducing costs and improving return on investment (ROI) for utilities, Smart Grids: Clouds, Communications, Open Source, and Automation explores the design and implementation of smart grid technologies, considering the benefits to consumers as well as businesses. Focusing on industrial applications, the text: Provides a state-of-the-art account of the smart grid Explains how smart grid technologies are currently being used Includes detailed examples and test cases for real-life implementation Discusses trade-offs associated with the utilization of smart grid technologies Describes smart grid simulation software and offers insight into the future of the smart grid The electric power grid is in the early stages of a sea of change. Nobody knows which business models will survive, but companies heeding the lessons found in Smart Grids: Clouds, Communications, Open Source, and Automation might just increase their chances for success.
