Download or read book Weather related Power Outages and Electric System Resiliency written by Richard J. Campbell and published by . This book was released on 2012 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: High winds, especially when combined with precipitation from seasonal storms, can cause damage to electricity utility systems, resulting in service interruptions to large numbers of electricity customers. While most such power outages are caused by damage from trees and tree limbs falling on local electricity distribution lines and poles, major power outages tend to be caused by damage to electricity transmission lines which carry bulk power long distances. Depending on the severity of the storm and resulting impairment, power outages can last a few hours or extend to periods of several days, and have real economic effects. Power outages can impact businesses (primarily through lost orders and damage to perishable goods and inventories), and manufacturers (mainly through downtime and lost production, or equipment damage). Data from various studies lead to cost estimates from storm-related outages to the U.S. economy at between $20 billion and $55 billion annually. Data also suggest the trend of outages from weather-related events is increasing. Suggested solutions for reducing impacts from weather-related outages include improved tree-trimming schedules to keep rights-of-way clear, placing distribution and some transmission lines underground, implementing Smart Grid improvements to enhance power system operations and control, inclusion of more distributed generation, and changing utility maintenance practices and metrics to focus on power system reliability. However, most of these potential solutions come with high costs which must be balanced against the perceived benefits. A number of options exist for Congress to consider which could help reduce storm-related outages. These range from improving the quality of data on storm-related outages, to a greater strategic investment in the U.S. electricity grid. Congress could empower a federal agency to develop standards for the consistent reporting of power outage data. While responsibility for the reliability of the bulk electric system is under the Federal Energy Regulatory Commission (as per the Energy Policy Act of 2005), no central responsibility exists for the reliability of distribution systems. One possible option could be to bring distribution systems under the Electric Reliability Organization for reliability purposes. Recovery after storm-related outages might be enhanced by a federal role in formalizing the review or coordination of electric utility mutual assistance agreements (MAAs). This would not necessarily mean federal approval of MAAs, but may help in the cooperative coordination of additional federal and state resources, especially in a wide, multi-state weather event. While there has been much discussion of transmission system inadequacies and inefficiencies, many distribution systems are in dire need of upgrades or repairs. The cost of upgrading the U.S. grid to meet future uses is expected to be high, with the American Society of Civil Engineers estimating a need of $673 billion by 2020. While the federal government recently made funding available of almost $16 billion for specific Smart Grid projects and new transmission lines under the American Recovery and Reinvestment Act of 2009, there has not been a comprehensive effort to study the needs, set goals, and provide targeted funding for modernization of the U.S. grid as part of a long-term national energy strategy. Such an effort would also require decisions about the appropriate roles of government and the private sector. Power delivery systems are most vulnerable to storms and extreme weather events. Improving the overall condition and efficiency of the power delivery system can only serve to improve the resiliency of the system, and help hasten recovery from weather-related outages. Ultimately, however, electric utilities are responsible for this infrastructure. They are in the business of selling electricity, and they cannot sell electricity if their power delivery systems are out of service.

Download or read book Weather Related Power Outages and Eectric System Resiliency written by Richard J. Campbell and published by . This book was released on 2012-10-10 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Resiliency of Power Distribution Systems written by Anurag K. Srivastava and published by John Wiley & Sons. This book was released on 2023-11-03 with total page 405 pages. Available in PDF, EPUB and Kindle. Book excerpt: RESILIENCY OF POWER DISTRIBUTION SYSTEMS A revolutionary book covering the relevant concepts for resiliency-focused advancements of the distribution power grid Most resiliency and security guidelines for the power industry are focused on power transmission systems. As renewable energy and energy storage increasingly replace fossil-fuel-based power generation over the coming years, geospatially neighboring distributed energy resources will supply a majority of consumers and provide clean power through long transmission lines. These electric power distribution systems—the final stage in the delivery of electric power—carry electricity from the transmission system to individual consumers. New distributed devices will be essential to the grid to manage this variable power generation and enhance reliability and resilience while keeping electricity affordable as the world seeks solutions to climate change and threats from extreme events. In Resiliency of Power Distribution Systems, readers are provided with the tools to understand and enhance resiliency of distribution systems—and thereby, the entire power grid. In a shift from the present design and operation of the power system, the book is focused on improving the grid’s ability to predict, adapt, and respond to all hazards and threats. This, then, acts as a guide to ensure that any incident can be mitigated and responded to promptly and adequately. It also highlights the most advanced and applicable methodologies and architecture frameworks that evaluate degradation, advance proactive action, and transform system behavior to maintain normal operation, under extreme operating conditions. Resiliency of Power Distribution Systems readers will also find: Chapter organization that facilitates quick review of distribution fundamental and easy-but-thorough understanding of the importance of resiliency Real-world case studies where resilient power systems could have prevented massive financial and energy losses Frameworks to help mitigate cyber-physical attacks, strategize response on multiple timescales, and optimize operational efficiencies and priorities for the power grid Resiliency of Power Distribution Systems is a valuable reference for power system professionals including electrical engineers, utility operators, distribution system planners and engineers, and manufacturers, as well as members of the research community, energy market experts and policy makers, and graduate students on electrical engineering courses.

Download or read book Economic Benefits of Increasing Electric Grid Resilience to Weather Outages written by Jason Furman and published by . This book was released on 2013-09-30 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: In June 2011, President Obama released "A Policy Framework for the 21st Century Grid" which set out a strategy for modernizing the electric grid. The initiative directed billions of dollars toward investments in 21st century smart grid technologies focused at increasing the grid's efficiency, reliability, and resilience, and making it less vulnerable to weather-related outages and reducing the time it takes to restore power after an outage occurs. Grid resilience is increasingly important as climate change increases the frequency and intensity of severe weather, which is the leading cause of power outages in the U.S. Between 2003 and 2012, an estimated 679 widespread power outages occurred due to severe weather. This report estimates the annual cost of power outages caused by severe weather between 2003 and 2012 and describes various strategies for modernizing the grid and increasing grid resilience. Over this period, weather-related outages are estimated to have cost the U.S. economy an inflation-adjusted annual average of $18 billion to $33 billion. Continued investment in grid modernization and resilience will mitigate these costs over time. Figures. This is a print on demand report.

Download or read book Enhancing the Resilience of the Nation s Electricity System written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2017-10-25 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Americans' safety, productivity, comfort, and convenience depend on the reliable supply of electric power. The electric power system is a complex "cyber-physical" system composed of a network of millions of components spread out across the continent. These components are owned, operated, and regulated by thousands of different entities. Power system operators work hard to assure safe and reliable service, but large outages occasionally happen. Given the nature of the system, there is simply no way that outages can be completely avoided, no matter how much time and money is devoted to such an effort. The system's reliability and resilience can be improved but never made perfect. Thus, system owners, operators, and regulators must prioritize their investments based on potential benefits. Enhancing the Resilience of the Nation's Electricity System focuses on identifying, developing, and implementing strategies to increase the power system's resilience in the face of events that can cause large-area, long-duration outages: blackouts that extend over multiple service areas and last several days or longer. Resilience is not just about lessening the likelihood that these outages will occur. It is also about limiting the scope and impact of outages when they do occur, restoring power rapidly afterwards, and learning from these experiences to better deal with events in the future.

Download or read book Electricity Grid Resilience written by United States. Government Accountability Office and published by . This book was released on 2021 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: According to the U.S. Global Change Research Program, changes in the earth’s climate are under way and expected to increase, posing risks to the electricity grid that may affect the nation’s economic and national security. Annual costs of weather-related power outages total billions of dollars and may increase with climate change, although resilience investments could help address potential effects, according to the research program. Private companies own most of the electricity grid, but the federal government plays a significant role in promoting grid resilience—the ability to adapt to changing conditions; withstand potentially disruptive events; and, if disrupted, to rapidly recover. DOE, the lead agency for grid resilience efforts, conducts research and provides information and technical assistance to industry. FERC reviews mandatory grid reliability standards. This report describes: (1) potential climate change effects on the electricity grid; and (2) actions DOE and FERC have taken since 2014 to enhance electricity grid resilience to climate change effects, and additional actions these agencies could take. GAO is making two recommendations: (1) DOE should develop a department-wide strategy to enhance grid resilience to climate change, and (2) FERC should identify and assess climate change risks to the grid and plan a response.

Download or read book Terrorism and the Electric Power Delivery System written by National Research Council and published by National Academies Press. This book was released on 2012-11-25 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The electric power delivery system that carries electricity from large central generators to customers could be severely damaged by a small number of well-informed attackers. The system is inherently vulnerable because transmission lines may span hundreds of miles, and many key facilities are unguarded. This vulnerability is exacerbated by the fact that the power grid, most of which was originally designed to meet the needs of individual vertically integrated utilities, is being used to move power between regions to support the needs of competitive markets for power generation. Primarily because of ambiguities introduced as a result of recent restricting the of the industry and cost pressures from consumers and regulators, investment to strengthen and upgrade the grid has lagged, with the result that many parts of the bulk high-voltage system are heavily stressed. Electric systems are not designed to withstand or quickly recover from damage inflicted simultaneously on multiple components. Such an attack could be carried out by knowledgeable attackers with little risk of detection or interdiction. Further well-planned and coordinated attacks by terrorists could leave the electric power system in a large region of the country at least partially disabled for a very long time. Although there are many examples of terrorist and military attacks on power systems elsewhere in the world, at the time of this study international terrorists have shown limited interest in attacking the U.S. power grid. However, that should not be a basis for complacency. Because all parts of the economy, as well as human health and welfare, depend on electricity, the results could be devastating. Terrorism and the Electric Power Delivery System focuses on measures that could make the power delivery system less vulnerable to attacks, restore power faster after an attack, and make critical services less vulnerable while the delivery of conventional electric power has been disrupted.

Download or read book The Resilience of the Electric Power Delivery System in Response to Terrorism and Natural Disasters written by National Research Council and published by National Academies Press. This book was released on 2013-10-22 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Resilience of the Electric Power Delivery System in Response to Terrorism and Natural Disasters is the summary of a workshop convened in February 2013 as a follow-up to the release of the National Research Council report Terrorism and the Electric Power Delivery System. That report had been written in 2007 for the Department of Homeland Security, but publication was delayed because of security concerns. While most of the committee's findings were still relevant, many developments affecting vulnerability had occurred in the interval. The 2013 workshop was a discussion of the committee\'s results, what had changed in recent years, and how lessons learned about the grid's resilience to terrorism could be applied to other threats to the grid resulting from natural disasters. The purpose was not to translate the entire report into the present, but to focus on key issues relevant to making the grid sufficiently robust that it could handle inevitable failures without disastrous impact. The workshop focused on five key areas: physical vulnerabilities of the grid; cybersecurity; mitigation and response to outages; community resilience and the provision of critical services; and future technologies and policies that could enhance the resilience of the electric power delivery system. The electric power transmission and distribution system (the grid) is an extraordinarily complex network of wires, transformers, and associated equipment and control software designed to transmit electricity from where it is generated, usually in centralized power plants, to commercial, residential, and industrial users. Because the U.S. infrastructure has become increasingly dependent on electricity, vulnerabilities in the grid have the potential to cascade well beyond whether the lights turn on, impacting among other basic services such as the fueling infrastructure, the economic system, and emergency services. The Resilience of the Electric Power Delivery System in Response to Terrorism and Natural Disasters discusses physical vulnerabilities and the cybersecurity of the grid, ways in which communities respond to widespread outages and how to minimize these impacts, the grid of tomorrow, and how resilience can be encouraged and built into the grid in the future.

Download or read book Powering Through written by Alex Rakow and published by CRC Press. This book was released on 2023-05-09 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: The threats to the electricity grid are on the rise at the same time as society is increasing its dependence on electricity for every aspect of our personal, social, and economic lives. We are accelerating that dependence – looking to the electrification of transportation and buildings as a way to stem the threats of climate change. Those threats have now arrived (in the form of more extreme weather, droughts, and wildfire) and they are joined by increasing threats from an aging grid and cyberattacks. The grid we rely on is experiencing increasingly vulnerable external forces. We aren’t helpless. Effective planning around these threats can dramatically reduce the havoc they engender on the electric grid. At every level, from a single building, to a city, to the electric grid and the federal government, steps can be taken to improve our resilience to threats to the electricity system. When those efforts are coordinated, their benefits multiply. This book aims to provide every level of decision-maker with tools and best practices for reducing the risk of and from electricity loss. It is written in non-technical language, with a focus on actionable, easily implemented steps.

Download or read book Power Systems Resilience written by Naser Mahdavi Tabatabaei and published by Springer. This book was released on 2018-08-16 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents intuitive explanations of the principles and applications of power system resiliency, as well as a number of straightforward and practical methods for the impact analysis of risk events on power system operations. It also describes the challenges of modelling, distribution networks, optimal scheduling, multi-stage planning, deliberate attacks, cyber-physical systems and SCADA-based smart grids, and how to overcome these challenges. Further, it highlights the resiliency issues using various methods, including strengthening the system against high impact events with low frequency and the fast recovery of the system properties. A large number of specialists have collaborated to provide innovative solutions and research in power systems resiliency. They discuss the fundamentals and contemporary materials of power systems resiliency, theoretical and practical issues, as well as current issues and methods for controlling the risk attacks and other threats to AC power systems. The book includes theoretical research, significant results, case studies, and practical implementation processes to offer insights into electric power and engineering and energy systems. Showing how systems should respond in case of malicious attacks, and helping readers to decide on the best approaches, this book is essential reading for electrical engineers, researchers and specialists. The book is also useful as a reference for undergraduate and graduate students studying the resiliency and reliability of power systems.

Download or read book Proceedings of the 7th International Conference on Electrical Control and Computer Engineering Volume 2 written by Zainah Md. Zain and published by Springer Nature. This book was released on with total page 637 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Power Grid Resilience against Natural Disasters written by Shunbo Lei and published by John Wiley & Sons. This book was released on 2023-02-13 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: POWER GRID RESILIENCE AGAINST NATURAL DISASTERS How to protect our power grids in the face of extreme weather events The field of structural and operational resilience of power systems, particularly against natural disasters, is of obvious importance in light of climate change and the accompanying increase in hurricanes, wildfires, tornados, frigid temperatures, and more. Addressing these vulnerabilities in service is a matter of increasing diligence for the electric power industry, and as such, targeted studies and advanced technologies are being developed to help address these issues generally—whether they be from the threat of cyber-attacks or of natural disasters. Power Grid Resilience against Natural Disasters provides, for the first time, a comprehensive and systematic introduction to resilience-enhancing planning and operation strategies of power grids against extreme events. It addresses, in detail, the three necessary steps to ensure power grid success: the preparedness prior to natural disasters, the response as natural disasters unfold, and the recovery after the event. Crucially, the authors put forward state-of-the-art methods towards improving today’s practices in managing these three arenas. Power Grid Resilience against Natural Disasters readers will also find: Data, tables, and illustrations to supplement and clarify the points put forward in each chapter Case studies on realistic power systems and industry standards and practices related to the topics covered Potential to be a supplementary text in advanced level power engineering courses Power Grid Resilience against Natural Disasters will be of interest to specialists and engineers, as well as planners and operators from industry. It can also be a useful resource for senior undergraduate students, postgraduate students, researchers, and research libraries. More, it will appeal to all readers with a strong background in power system analysis, operation and control, optimization methods, the Markov decision process, and probability and statistics.

Download or read book Resilience of Smart Energy Systems written by Zhanwei He and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A power system is vital to bring power to serve millions of homes and businesses across the nation. However, more frequent and intense extreme weather events, such as hurricanes, wildfires, and heat waves, put lots of stress on the aging power infrastructure. In 2012, superstorm Sandy have wreaked havoc on the east coast of the United States, revealing that a metropolitan power grid could be easily destroyed by wind and water. Another reliability challenge occurred in February 2021 when a prolonged cold spell affected Texas. Since the generation units failed to receive natural gas, the grid operator was forced to deploy a large-scale load shedding and implement rolling blackouts. Apart from extreme weather events, a new threat, cyberattack, on power system is even worse because it often occurs with less warning than natural disasters, offering less time to prepare. A real-world incident is the Ukraine blackout that happened in 2015, revealing the urgency of the cybersecurity risk. A cyberattack compromised the information systems of three regional power distribution companies, affecting around 225,000 people without electricity for several hours. Therefore, the increase in extreme weather events and cyberattack incidents is putting a new spotlight on power system resilience. However, solutions for resilience enhancement are relatively new and lack widely accepted standards and methods. In this Ph.D. dissertation, we attempt to contribute solutions to tackle the challenges of power system resilience. For power system cybersecurity, prevention is the first strategy. The first two research projects focus on developing data-driven algorithms to detect stealthy cyberattacks that are designed to overflow transmission lines. \par Beyond prevention, isolated microgrids, which implement on-site distributed energy resources to serve local demand, can be employed to prepare for the worst. Microgrids could respond rapidly to protect critical assets when extreme weather conditions or hackers disrupt power systems. Three projects have investigated the application of microgrids. The third research project proposes a coordinated sizing framework to determine the required power and ramp capacities of the on-site distributed energy resources, such as photovoltaic (PV) systems, natural gas-fired generators, and battery energy storage systems (BESS), to ensure the adequate generation and ramping capacities of DERs to meet the loads without ramp insufficiency. Unlike the stationary BESS, which has a high capital cost and fixed charging/discharging capacity, a group of electric vehicles (EVs) could work as configurable distributed energy storage (also known as virtual power plants) without additional capital cost for microgrids to provide additional supply and storage capacity. Therefore, electric vehicles have become an important asset for microgrids to provide grid services. The fourth project explores the optimal configurations of the number of EVs interacting with a microgrid by investigating 1) the impact of integrated EVs on electric bills in a grid-connected microgrid and 2) the role of different EV numbers in influencing the required stationary battery energy storage system (BESS) capacity in an isolated microgrid. In addition, the on-site generator could be used more efficiently if cogeneration is employed. Cogeneration, also known as combined heat and power (CHP), allows waste heat to be recycled into useful steam or additional electricity, improving the overall primary energy use efficiency. The heat-to-power ratio of a CHP facility is usually in a range from 1.5 to 2.5, which means it is necessary to develop a dynamic thermal model to manage the massive amount of waste heat. The fifth research project aims to model a waste heat recovery heat exchanger system, such as once-through steam generator (OTSG), in order to capture the transient behaviors in the heat transfer process and thus better estimate the relationship between the natural gas consumption of the generator and the steam output from the OTSG. The dynamic thermal model simulation results could be used to improve the design and operation of the hybrid energy system, which includes CHP system, OTSG, steam turbine, and steam accumulator. As a result, it assists in transitioning conventional district heating systems to newer technologies. Overall, this Ph.D. dissertation presents new methods to detect cyberattacks on power systems and provides solutions to better design and operate the distributed energy resources in microgrids and district heating systems to improve the primary energy use efficiency, power reliability, and resiliency. The results could help utility planners, operators, and policymakers to better develop smart, sustainable, and resilient buildings and communities.

Download or read book Enabling Resiliency of the Electric Distribution Systems During Extreme Events written by Sayonsom Chanda and published by . This book was released on 2018 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The resiliency of the electric power grid to extreme events is a fundamental motivation for modernizing the aging and vulnerable critical infrastructure. The alarming rise in the number of incidences of cyber-attacks and severe storms over the last few years have caused prolonged power outages for millions of customers. The financial impact of these events upon the utilities has been several hundred billions of dollars.The objective of this dissertation is to develop a comprehensive framework and algorithms for enabling resiliency of power distribution systems - encompassing time-span from planning to post-event restoration and recovery that would minimize the power outages resulting in less economic losses and public inconveniences.Some of the main challenges of the industry in planning - are the broad range of interpretations of power distribution system resiliency, based on the time available for preparing before an event happens and recovering afterward, and lack of detailed, region-specific distribution models. This dissertation addresses these problems extensively. A mathematical model for studying the propagation of extreme events in the cyber-physical power grid has also been discussed.Enabling resiliency in near-term or during the contingency requires the ability to perform power flow and restoration calculations for the impending or ongoing threat. Thus, an event-driven proactive network reconfiguration strategy has been proposed, to study how the path of propagation can impact the operation and restoration of the power distribution system.In the aftermath of an event, the distribution system infrastructure is characterized by uncertain topology, load demand, power resources, and time until power can be completely restored to all customers. In this work, the resiliency of the electric grid has been studied as a robust optimization problem for the effective allocation of scant resources to meet the demands of critical customers during prolonged periods of power outage.The proposed theory and algorithms in this dissertation have been tested on IEEE test systems as well as validated against actual data available from industry partners.

Download or read book Electric Power Systems Resiliency written by Ramesh C. Bansal and published by Academic Press. This book was released on 2022-07-14 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electric Power Systems Resiliency: Modelling, Opportunity and Challenges considers current strengths and weaknesses of various applications and provides engineers with different dimensions of flexible applications to illustrate their use in the solution of power system improvement. Detailing advanced methodologies to improve resiliency and describing resilient-oriented power system protection and control techniques, this reference offers a deep study on the electrical power system through the lens of resiliency that ultimately provides a flexible framework for cost-benefit analysis to improve power system durability. Aimed at researchers exploring the significance of smart monitoring, protecting and controlling of power systems, this book is useful for those working in the domain of power system control and protection (PSOP). - Features advanced methodologies for improving electrical power system resiliency for different architectures, e.g., smart grid, microgrid and macro grid - Discusses resiliency in power generation, transmission and distribution comprehensively throughout - Includes case studies that illustrate the applications of resilience in power systems

Download or read book Analysis of Storm Related Outages and Restoration Measures Washington D C Metropolitan Area written by Commonwealth Associates, inc and published by . This book was released on 1982 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book RESILIENT OPERATING STRATEGIES written by Chong Wang and published by Open Dissertation Press. This book was released on 2017-01-26 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Resilient Operating Strategies Against Weather-related and Cybersecurity-related Events" by Chong, Wang, 王冲, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Electric power systems are considered as critical infrastructures of modern societies. To support sustainable developments of modern societies, electric power systems are being constructed with the characteristics of better economy and higher reliability via many ways, e.g., power system interconnection and cyber-based monitoring/controls. Power system interconnection results in wide geographical coverage, which makes power systems exposed to external weather-related events. In addition, cyber-based systems for monitoring/controls make power systems more vulnerable to potential cyber intrusions. Conventional strategies, due to little consideration of weather-related and cybersecurity-related events, fail to make appropriate responses to these events. To deal with potential weather-related and cybersecurity-related events, power systems are suggested to have the characteristic of resilience. The key understanding of resilience is to proactively enhance robustness prior to an event, real-timely mitigate damages during an event, and rapidly restore systems after an event. Though the characteristics of resilient power systems have been well recognized, specific resilient strategies are still in the infancy. The contributions of this thesis are to establish sequential strategies against weather-related and cybersecurity-related events to construct a resilient power system. First, prior to weather-related events, a dynamic coordinated condition-based maintenance strategy, considering influences of extreme weather events, is proposed. The deterioration of each component and the influences of weather events are modeled as Markov processes. A backward induction with a search space reduction method is employed to improve computational efficiency while still maintaining good accuracy. Second, during weather-related events, two points are focused on. The first point is to develop an extended Kalman filter with equality constraints for multi-area dynamic state estimation to help system operators achieve system states. In the proposed method, a corrective strategy is proposed to estimate a corrective internal voltage (CIV) and a corrective rotor angle (CRA) of each generator. The CIV and the CRA are then used to establish equality constraints for updating generators' dynamic states. The second point is to propose a Markov-based model for sequential generation redispatch during weather-related events. The system topology, at each decision epoch, is considered as a Markov state. For each state, a recursive model, including a current cost and a future cost, is established, considering operation constraints. By using the linear scalarization method, the recursive model is transformed into a linear programming model. Third, during cybersecurity-based events, three points are focused on. The first point is to propose a cyber inference system against alter-and-hide attacks. The second point is to propose a dynamic game-based model to determine preventive strategies for mitigating the risk of power outages when a system is under cyberattacks but before unauthorized operations can be conducted by intruders. The third point is to propose a risk mitigation model with a partially observed Markov decision process, when a PMU-based grid is under cyberattacks. Subjects: Electric power systems - Control Electric power system stability