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 41 for “"grid stability"”.
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Analysis of a Major Electric Grid – Stability and Adaptive Protection
Protective systems of the electric grid are designed to detect and mitigate the effects of faults and other disturbances that may occur. Distance relays are used extensively for the detection of faults on transmission lines. Out-of-step relays are used for generator protection to detect loss of …
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Power System Parameter Estimation for Enhanced Grid Stability Assessment in Systems with Renewable Energy Sources
The modern day power grid is a highly complex system; as such, maintaining stable operations of the grid relies on many factors. Additionally, the increased usage of renewable energy sources significantly complicates matters. Attempts to assess the current stability of the grid make use of several …
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Modeling and integration of smart control strategies to improve large-scale pv system management and operation in a low inertia power grid
… of synchronous generators connected to the grid. System inertia is pivotal for power system stability during sudden imbalances in active power. Thus, reducing system inertia is a significant concern for ensuring frequency stability. Integrating RESs also introduces technical hurdles, …
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Adaptive Scheduling in a Distributed Cyber-Physical System: A case study on Future Power Grids
… are beneficial for the overall CPS. Future Power-Grid is one of the major example of Cyber-physical systems. Traditionally, Power-Grids use a centralized approach to manage the energy produced at power sources or large power plants. Due to the advancement and availability of renewable energy …
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Techno-Economic Analysis of Fusion Energy in the European Electricity Market
… storage to manage intermittency and maintain grid stability.
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Implementation and lessons learned from the Texas Synchrophasor Network
… power engineers have used simulations to predict grid stability and voltage phase angles. Only recently have equipment been available to actually measure phase angle at points hundreds of miles away. A few of these systems are presently operating in the US by electric grids including the Electric …
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Design of Hybrid Inverters Using Wideband Gap Semiconductors for Microgrid Application
… with an energy storage system (ESS) to the grid through a hybrid inverter, with the highest efficiency and grid stability, is quickly becoming a necessity for the near future. This thesis explores the integration of wide band gap semiconductors for the power stage in these systems, along …
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Cyber-Resilient Control of Synchronous Condensers
… power systems leads to new challenges to grid stability in weak networks and creates heightened cybersecurity vulnerabilities due to the extensive reliance on information and communication technologies. This dissertation investigates and proposes methodologies to enhance the stability and …
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Reactive power potential: A contribution of hydropower for the Energy Transition
… significant <br/>challenges for the electricity grid, especially in terms of expanding the network and <br/>ensuring its reliability. <br/>This study explores the critical role of hydropower plants in stabilizing the energy <br/>system. In addition to generating renewable energy, hydropower …
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Investigation of a new method for synchronous generator loss of excitation protection
… of field can compromise both generator and power grid stability and therefore must be quickly detected. In this thesis, a new proposed method for LOF detection has been further explored and its shortcomings corrected.The detection index has been calculated based on these new modifications. The …
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Modelling Extreme Forecast Errors in Wind Energy Using South African Wind Farms
… forecasting has become crucial for preserving grid stability and guaranteeing a consistent power supply in the light of South Africa’s expanding shift to renewable energy. As they have a direct impact on scheduling, dispatch choices, and reserve allocation, extreme prediction errors in …
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Development of a System Control Algorithm for Smart Residential Demand-Side Management
<p>With the advent of smart grid and home technologies, falling costs of renewable energy, and time-varying energy pricing models there is need for home energy management systems that can implement demand-side management. By dynamically responding to the fluctuating cost of energy, such a system …
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Assessing Broadband and Spectral Irradiance Variability for Solar Nowcasting Using Statistical Analysis and Machine Learning
… the effects of PV variability on electrical grid stability, grid operators rely on solar forecasts to proactively dispatch grid assets and balance supply and demand. To gain insights into the nature of solar variability, which is key for effective solar forecasting, this thesis presents a …
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Visualization of energy transfer among redox active polymeric colloids via in-situ fluorescence microscopy
… renewable energy sources to the electrical grid is resulting in energy storage becoming more and more crucial to both improve grid stability and to enable increasing penetration of renewable in electrical generation. There are numerous number of technologies being considered for that purpose …
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Attack resilient GPS based timing for phasor measurement units using multi-receiver direct time estimation
… current phasors at different nodes in the power grid. These PMUs depend on Global Positioning Systems (GPS) for precise time and synchronization. However, GPS civil signals are vulnerable to external attacks because of its low power and unencrypted signal structure. Therefore, there is a need for …
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Alternative methods for mitigating natural photovoltaic variability: dynamic HVAC load compensation and curtailed PV power
… of renewable energy resources onto the electric grid increases variability and decreases grid stability. Energy storage can help mitigate some of these effects, but conventional energy storage such as batteries is typically expensive and has other disadvantages such as round trip inefficiency and …
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Strengthening Value Chains for Developing and DeployingBatteries in the Global South
… transformative potential of BESS for enhancing grid stability and enabling renewable energy integration, thereby empowering the Global South to leapfrog to a resilient and green energy paradigm. This thesis coalesces into a comprehensive framework that underscores the multifaceted aspects of …
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Information Theory and Cooperative Control in Networked Multi-Agent Systems with Applications to Smart Grid
… and control architecture for smart grid with communication constraints in which distributed customers equipped with renewable distributed generation (RDG) interact and trade energy in the grid. We introduce the key components and their interactions in the proposed control …
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Critical Evaluation of DC-Grid and Strong Grid-Forming Wind Generator Systems
… energy has intensified challenges related to grid stability and material sustainability in wind power systems. This research addresses two critical issues: the declining grid strength due to inverter-based resource integration, and the dependency on rare-earth permanent magnets in wind …
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Innovative energy systems and processes based on hydrogen from RES and its derivatives in the energy transition process
… of renewable sources, which affects grid stability and can lead to energy curtailment. By converting surplus renewable electricity into chemical energy carriers such as hydrogen and ammonia, it is possible to enhance system flexibility, support grid services, and provide carbon-free …
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