Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 87 for “"Blackouts"”.
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WAMS-based Intelligent Load Shedding Scheme for Preventing Cascading Blackouts
Severe disturbances in a large electrical interconnection cause a large mismatch in generation and load in the network, leading to frequency instability. If the mismatch is not rectified quickly, the system may disintegrate into multiple islands. Though the Automatic Generation Controls (AGC) …
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Critical point study in the Sabah power grid for cascading failure blackouts
Sabah System Grid is made up of 66kV, 132kV and 275kV which link up all major towns in Sabah and Federal Territory of Labuan. As the Grid Owner, SESB is responsible for the development, management and operation of the Sabah System Grid. All activities pertaining to the System Grid are bounded by …
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Blackouts made visible : a visual-textual analysis of Sarah Glidden's comics journalism
… Sarah Glidden's largely unexamined book Rolling Blackouts as a significant contribution to the genre known as comics journalism. It argues that Glidden's work engages in a material struggle over the nature of journalism by using the comics form to intervene in an ongoing debate over the field's …
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Resilient operations of smart electricity networks under security and reliability failures
Blackouts (or cascading failures) in Electricity Networks (ENs) can result in severe consequences for economic activity, human safety and national security. Recent incidents suggest that risk of blackouts due to cyber-security attacks and extreme weather events is steadily increasing in many …
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Mitiiation of Blackout in Kigali Using a Microgrid with Advanced Energy Storage and Solar Photovoltaics
… power, the social and economic ramifications of blackouts are dire, negatively impacting the productivity, safety, and security of communities. To reduce blackout occurrence, power system planners incorporate redundancy and advanced controls to the grid to make it more adaptable to disturbances. …
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Risk Management of Cascading Failure in Composite Reliability of a Deregulated Power System with Microgrids
… hazards resulting from climate change, major blackouts are becoming more frequent and are spreading over larger regions, entailing higher losses and costs to the economy and the society of many countries in the world. Large-scale blackouts typically result from cascading failure originating …
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Key performance indicators modeling for optimized microgrid configuration
… can be the result of natural or manmade threats. Blackouts are one of the distribution systems failures. Many people can be affected by blackouts. Therefore, microgrids can be a suitable candidate to have a robust and secure distribution power system Microgrids can support the distribution systems …
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An Initial Exploration of Spatial Spreading of Cascading Failure in an Electric Power System
<p>Large blackouts typically involve the cascading outage of transmission lines. However, little is known about the overall patterns of cascading outages. This research processes and initially examines observed utility data to explore the spatial spreading of cascading failure. The utility data is …
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Effective implementation of energy efficiency in the South African residential sector
… resources effectively. In light of the recent blackouts, South Africa has stepped up its energy efficiency initiatives in order to delay the need for new generation capacity, but human behavioural responses often tend to offset the beneficial effects of such initiatives. Such behavioural …
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Load Modeling using Synchrophasor Data for Improved Contingency Analysis
… include redundancy. Yet the increasing number of blackouts and failures have highlighted the areas that require improvement. Meeting the increasing demand for energy and the growing complexity of the loads are two of the main challenges faced by the power grid. In order to prepare for …
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Evaluating electricity generation expansion planning in Ghana
… power crisis in its history with regular rolling blackouts. Rural and low-income urban areas and businesses were especially affected, and public discontent was palpable. The government's response was a reactive approach to generation expansion planning, focused on increasing supply. Power …
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ICT-Enabled Control and Energy Management of Community Microgrids for Resilient Smart Grid Operation
… <strong>(1) </strong>the massive and extended blackouts caused by natural disasters, such as hurricane Sandy. These blackouts have raised a national call to explore innovative approaches for enhanced grid resiliency. Scrutinizing how previous blackouts initiated and propagated throughout the …
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Self adapting smart electrical grid
… system showing signs of weakness in the form of Blackouts. There have been 5 blackouts in the past 40 years out of which 3 of them have occurred in the last 9 years, [15]. At the same time requirements of more environmentally friendly power sources is supplying additional engineering challenges. …
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Energy-efficient control of a smart grid with sustainable homes based on distributing risk
… an electrical grid poses a significant risk of blackouts since the energy supplied by the renewables is unpredictable and intermittent. The uncertain behavior of renewable energy sources increases the risk of blackouts. Therefore, an important challenge is to develop an intelligent control …
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Pattern Recognition of Power Systems Voltage Stability Using Real Time Simulations
… remedial actions and for possible prevention of blackouts. To detect cases of voltage collapse, we shall create methods using pattern recognition in conjunction with real time simulation of case studies and shall develop heuristic methods for separating voltage stable cases from voltage unstable …
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Enabling Communication and Networking Technologies for Smart Grid
… After a thorough analysis of U.S. historical blackouts, North American Electric Reliability Council (NERC) has concluded that the hidden failure induced tripping of distance relays is responsible for 70% of the U.S. blackouts. As a part of this dissertation, agent based distance relaying …
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Study of methods to predict voltage collapse
… making the problem more multifarious. Widespread blackouts, similar to the one that occurred in the northeast in August 2003, could result from failure to address the problem. This thesis presents an overview of the voltage collapse problem and reviews some existing methods to calculate voltage …
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Solar power forecasting using Gaussian process regression
… lives. Many African countries are now facing blackouts due to a shortage of energy. This has caused the urge to encourage people to use other energy sources to rise, resulting in different energy inputs into the main electricity grid. When the number of power sources being fed into the main …
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A Local Measurement Based Protection Methodology for Initiating Controlled Islanding in Power Systems
… work, power systems still have experienced major blackouts in the past due to cascading outages. Hence, preventing the cascading outage holds the key to the prevention of such blackouts in the future. To address this problem, researchers have proposed controlled islanding as a last resort that …
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Empowering communities through comprehensive community-based energy advocacy : assessing energy programs and advocacy in California and New Mexico
… widespread attention until price surges or blackouts impede everyday activities. With higher energy burdens and higher incidences of power plants in their neighborhoods, however, low-income and Latino/communities of color confront significant economic and environmental energy-related …
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