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 95 for “"Smart grids"”.
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Electric vehicles in Smart Grids: Performance considerations
… system even more efficient, the novel "Smart Grid" concept has emerged. A Smart Grid: offers a two-way communication between the source and the load; integrates renewable sources into the generation system; and provides reliability and sustainability in the entire power system from …
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Privacy-preserving power usage control in smart grids
"The smart grid (SG) has been emerging as the next-generation intelligent power grid system because of its ability to efficiently monitor, predicate, and control energy generation, transmission, and consumption by analyzing users' real-time electricity information. Consider a situation in which the …
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Distributed online algorithms for energy management in smart grids
The 21st-century electric power grid is transitioning from a centralized structure designed for bulk-power transfer to a distributed paradigm that integrates the variable renewable energy (VRE) resources spatially distributed across the grid. This work proposes algorithmic solutions for distributed …
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Voltage Regulation of Smart Grids using Machine Learning Tools
Smart inverters have been considered the primary fast solution for voltage regulation in power distribution systems. Optimizing the coordination between inverters can be computationally challenging. Reactive power control using fixed local rules have been shown to be subpar. Here, nonlinear …
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Security and Privacy Schemes for Demand Response in Smart Grids
Smart Grids integrate currently isolated power and communications networks, while introducing several new technologies on the hardware and software sides. One of the most important ingredients is the potential for demand-response programs, which offer the possibility of sending instructions to …
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Power network and smart grids analysis from a graph theoretic perspective
… A few important topics in power systems and smart grids such as controllability and robustness are addressed using the symmetry concept. These topics are directed toward solving specific problems in complex power networks. The controllability analysis will lead to new algorithms elaborating …
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Power System State Estimation and Renewable Energy Optimization in Smart Grids
<p>The future smart grid will benefit from real-time monitoring, automated outage management, increased renewable energy penetration, and enhanced consumer involvement. Among the many research areas related to smart grids, this dissertation will focus on two important topics: power system state …
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Application of unified invariants for cyber physical systems in smart grids
… of Unified Invariants. In this dissertation, a smart grid has been used to implement and validate this concept of Unified Invariants towards building a robust cyber-physical system. There are several ways to compromise the reliable operation of a smart grid. Examples of such contingent events …
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Implementation of Secure DNP3 Architecture of SCADA System for Smart Grids
… on their vulnerabilities. Vital stations in the smart grid are the generation, transmission, distribution, and customer substations are connected and controlled remotely by the network. Every substation is controlled by a Supervisory Control and Data Acquisition (SCADA) system which communicates …
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Privacy and security for applications and services in future generation smart grids
Dissertations submitted in fulfilment of the academic requirements of Doctor of Engineering in Electrical Engineering at the Durban University of Technology, South Africa, 2022.
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Contributions to Distribution System State Estimation (DSSE) in the context of smart grids
Esta tesis propone un nuevo enfoque de DSSE para redes europeas de baja tensión (BT) de cuatro hilos que se enfrentan a retos como el débil acoplamiento entre fases y la latencia de la comunicación. Introduce una estrategia de medidas sintéticas, generadas mediante la reconfiguración de sensores …
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Assessment of Cyber Vulnerabilities and Countermeasures for GPS-Time Synchronized Measurements in Smart Grids
We aim at expanding the horizon of existing research on cyberattacks against the time-syncrhonized devices such as PMUs and PDCs, along with corresponding countermeasures. We develop a PMU-PDC cybersecurity testbed at Virginia Tech Power and Energy Center (PEC) lab. The testbed is able to simulate …
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Learning from multi-modal spatiotemporal data: machine learning approaches to advance resilience in smart grids
… While machine learning can be used to analyze smart grid data, this can be challenged by the nature of its data. Smart grid produces high-dimensional spatiotemporal data, and many applications require multi-modal data. Moreover, power systems' data quality challenges add complexities to model …
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Data-driven methods to improve resource utilization, fraud detection, and cyber-resilience in smart grids
… fraud detection, and cyber-resilience in smart grids. The modern power grid, known as the smart grid, uses computer communication networks to improve efficiency by transporting control and monitoring messages between devices. At a high level, those messages aid in ensuring that power …
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Stochastic dynamic optimization of consumption and the induced price elasticity of demand in smart grids
This thesis presents a mathematical model of consumer behavior in response to stochastically-varying electricity prices, and a characterization of price-elasticity of demand created by optimal utilization of storage and the flexibility to shift certain demands to periods of lower prices. The …
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The development of novel services for battery storage in domestic applications and communal mini-smart grids
Lithium-ion battery technology remains a key factor in energy storage technology due to its advantageous features which include high energy and power density, low self-discharge, and longer lifespan. However, the continuous cycling of the battery over its lifetime results in gradual internal …
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Optimal coordination of distributed energy resources in smart grids enabled by distributed optimization and transactive energy
Modern active distribution grids are characterized by the increasing penetration of distributed energy resources (DERs). The proper coordination and scheduling of a large numbers of these DERs can only be achieved at the nexus of new technological approaches and policies, primarily distributed …
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Analysis and techniques of data compression in smart grids in the context of IEC 61850 communication protocol
A smart grid is characterized by a two-way communication between the generation and the loads in addition to the distributed energy resources, which dictated the integration of smart monitoring devices to achieve full observability of the network. In smart grid operation, the monitoring and the …
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Threat Assessment for Multistage Cyber Attacks in Smart Grid Communication Networks
In smart grids, managing and controlling power operations are supported by information and communication technology (ICT) and supervisory control and data acquisition (SCADA) systems. The increasing adoption of new ICT assets in smart grids is making smart grids vulnerable to cyber threats, as well …
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