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Simulation And Fabrication Of All Oxide-Based Ito/Tio2/Cuo/Au Heterostructure For Solar Cell Applications, Sajal Islam 2021 Missouri State University

Simulation And Fabrication Of All Oxide-Based Ito/Tio2/Cuo/Au Heterostructure For Solar Cell Applications, Sajal Islam

MSU Graduate Theses

Oxide heterostructures have drawn great attention lately, due to their environment-friendly properties and potential applications in optoelectronic devices. In this work, a simulation study of a heterojunction solar cell was performed with SCAPS (a solar cell simulator) using TiO2 as an n-type and CuO as a p-type layer. The thickness and the dopant-dependent simulations have shown that the solar cell operates at a maximum efficiency of 19.2% when the thickness of the TiO2/CuO layers is chosen 1.4µm/1.2µm compared to the 11.5% efficiency when FTO is replaced with ITO. An indium-doped tin oxide (ITO) vs ...


Roadway-Embedded Transmitters And Multi-Pad Receivers For High Power Dynamic Wireless Power Transfer, Benny J. Varghese 2021 Utah State University

Roadway-Embedded Transmitters And Multi-Pad Receivers For High Power Dynamic Wireless Power Transfer, Benny J. Varghese

All Graduate Theses and Dissertations

Electric vehicles (EVs) offer considerable economic and environmental benefits to society. Despite the decreasing vehicle costs and increasing range of newer EVs, the problem of range anxiety still exists. Range anxiety, at its core, is an issue of charging speeds rather than a concern about the driving range. Dynamic wireless charging of EVs is seen as a potential solution to this issue of range anxiety. Further, wireless charging technology also helps the push towards level 5 autonomy and opens new opportunities for how an EV can be utilized.

Dynamic wireless power transfer (DWPT) systems typically require a high initial investment ...


Lifetime And Performance Alteration Of Photovoltaic Panels, The Case Of Aerzen, Germany, Furkan Dinçer 2021 Kahramanmaras Sutcu Imam University

Lifetime And Performance Alteration Of Photovoltaic Panels, The Case Of Aerzen, Germany, Furkan Dinçer

Dicle University Journal of Engineering

Solar energy is unlimited, flawlessly, sustainable and among of the most preferred renewable energy source. The rapid development and the increasing demand in solar energy technologies provided an increasing the production and played an important role for reducing costs. Thousands of manufacturers around the world produce solar panels however solar panels are also exposed to aging during their lifetime. This aging of the solar panel is generally expressed by the manufacturers as 10% generation performance loss in 10 years and 20% in 25 years. However, solar panel technology is not a very old technology and these statements on aging are ...


Improving The Power Outage Resilience Of Buildings With Solar Pv Through The Use Of Battery Systems And Ev Energy Storage, Huangjie Gong, Dan M. Ionel 2021 University of Kentucky

Improving The Power Outage Resilience Of Buildings With Solar Pv Through The Use Of Battery Systems And Ev Energy Storage, Huangjie Gong, Dan M. Ionel

Electrical and Computer Engineering Faculty Publications

Buildings with solar photovoltaic (PV) generation and a stationary battery energy storage system (BESS) may self-sustain an uninterrupted full-level electricity supply during power outages. The duration of off-grid operation is dependent on the time of the power fault and the capabilities of the home energy management system (HEMS). In this paper, building resilience is quantified by analyzing the self-sustainment duration for all possible power outages throughout an entire year. An evaluation method is proposed and exercised on a reference house in California climate zone 9 for which the detailed electricity usage is simulated using the EnergyPlus software. The influence of ...


Zip Load Modeling For Single And Aggregate Loads And Cvr Factor Estimation, Yiqi Zhang, Yuan Liao, Evan S. Jones, Nicholas Jewell, Dan M. Ionel 2021 university of Kentucky

Zip Load Modeling For Single And Aggregate Loads And Cvr Factor Estimation, Yiqi Zhang, Yuan Liao, Evan S. Jones, Nicholas Jewell, Dan M. Ionel

Electrical and Computer Engineering Presentations

ZIP load modeling has been used in various power system applications. The aggregate load modeling is common practice in utility companies. However, little research has been done on the theoretical formulation of the aggregate load. This paper formulates the aggregate ZIP load model using the single ZIP load model. The factors that may affect aggregate ZIP load estimation are studied. Common ZIP parameter estimation methods including least squares method, optimization method and neural network method have been used in this paper to estimate ZIP parameters. The case studies are based on the IEEE 13-bus and 34-bus system built in OpenDSS ...


Application Of Artificial Neural Networks To Power System State Estimation, James P. Carmichael, Yuan Liao 2021 University of Kentucky

Application Of Artificial Neural Networks To Power System State Estimation, James P. Carmichael, Yuan Liao

Electrical and Computer Engineering Presentations

State estimation function is essential for effective and timely execution of power system automation and control systems, especially in modern active distribution systems where more intermittent renewable energy systems are integrated into the grid. Distribution system state estimation faces a lot of challenges including lack of monitoring devices and possible incorrect topology information. Developing efficient state estimation for distribution systems is thus of great interest. This paper presents results on utilizing artificial neural networks for this purpose.

Artificial neural networks have been used in power distribution system state estimation. However, there is a lack of systematic analysis and study of ...


The Effect Of A Ferrite-Core Relay Vs. An Air-Core Relay On The Output Power Characteristics Of A Three-Coil Wireless Power Transfer System, Jakob L. White 2021 Portland State University

The Effect Of A Ferrite-Core Relay Vs. An Air-Core Relay On The Output Power Characteristics Of A Three-Coil Wireless Power Transfer System, Jakob L. White

University Honors Theses

The purpose of this thesis is to determine the effect of using a ferrite-core relay on the output power characteristics of a three-coil, parallel-tuned, domino-resonator wireless power transfer (WPT) system in comparison to the effect of using an air-core relay in such a system. First, a general mathematical model is presented to describe both the ferrite-core-relay system and the air-core-relay system and to calculate their output power characteristics for seven different resistive loads at each of five different distance configurations between the coils. Next, experimental results are analyzed and compared to the mathematical results to confirm model accuracy. Finally, the ...


Knn Based Piezo-Triboelectric Lead-Free Hybrid Energy Films, Abu Masa Abdullah, Muhtasim Ul Karim Sadaf, Farzana Tasnim, Horacio Vasquez, Karen Lozano, M. Jasim Uddin 2021 The University of Texas Rio Grande Valley

Knn Based Piezo-Triboelectric Lead-Free Hybrid Energy Films, Abu Masa Abdullah, Muhtasim Ul Karim Sadaf, Farzana Tasnim, Horacio Vasquez, Karen Lozano, M. Jasim Uddin

Chemistry Faculty Publications and Presentations

In recent times, the triboelectric and piezoelectric effects have garnered significant attention towards developing advanced material composites for energy harvesting and sensory applications. In this work, potassium sodium niobate (KNN) based energy films (EF) have been developed to utilize mechanical energy while simultaneously taking advantage of triboelectric and piezoelectric mechanisms. The KNN particles were synthesized using a wet ball milling technique and then incorporated into a polyvinylidene difluoride (PVDF) matrix together with addition of multi wall carbon nanotubes (MWCNT). The film was used to develop a piezoelectric nanogenerator (PENG) fitted with copper electrodes. The piezoelectric output of the film was ...


Model-Based And Model-Free Approaches For Power System Security Assessment, Mariana Magdy Mounir Kamel 2021 University of Tennessee, Knoxville

Model-Based And Model-Free Approaches For Power System Security Assessment, Mariana Magdy Mounir Kamel

Doctoral Dissertations

Continuous security assessment of a power system is necessary to insure a reliable, stable, and continuous supply of electrical power to customers. To this end, this dissertation identifies and explores some of the various challenges encountered in the field of power system security assessment. Accordingly, several model-based and/or model-free approaches were developed to overcome these challenges.

First, a voltage stability index, named TAVSI, is proposed. This index has three important features: TAVSI applies to general load models including ZIP, exponential, and induction motor loads; TAVSI can be used for both measurement-based and model-based voltage stability assessment; and finally, TAVSI ...


Characterization Techniques And Cation Exchange Membrane For Non-Aqueous Redox Flow Battery, Kun Lou 2021 University of Tennessee, Knoxville

Characterization Techniques And Cation Exchange Membrane For Non-Aqueous Redox Flow Battery, Kun Lou

Doctoral Dissertations

The motivation of this work comes from one of the major problems of emerging non-aqueous flow battery (NAFB) that a separator or membrane which facilitates conductivity and blocks redox species crossover does not exist. Although many aspects of principles can be mirrored from mature fuel cell and aqueous flow battery, it is found that some well-defined membrane properties in aqueous systems such as swelling, transport and interactions are different in non-aqueous solvents to some extent. However, the approach of this work does follow the way perfluorosulfonate ion exchange membrane (PFSA) facilitated development of fuel cell and aqueous flow battery in ...


Power System Stability Assessment With Supervised Machine Learning, Mirka Mandich 2021 University of Tennessee, Knoxville

Power System Stability Assessment With Supervised Machine Learning, Mirka Mandich

Masters Theses

Power system stability assessment has become an important area of research due to the increased penetration of photovoltaics (PV) in modern power systems. This work explores how supervised machine learning can be used to assess power system stability for the Western Electricity Coordinating Council (WECC) service region as part of the Data-driven Security Assessment for the Multi-Timescale Integrated Dynamics and Scheduling for Solar (MIDAS) project. Data-driven methods offer to improve power flow scheduling through machine learning prediction, enabling better energy resource management and reducing demand on real-time time-domain simulations. Frequency, transient, and small signal stability datasets were created using the ...


High Frequency Injection Sensorless Control For A Permanent Magnet Synchronous Machine Driven By An Fpga Controlled Sic Inverter, Jared Walden 2021 University of Tennessee, Knoxville

High Frequency Injection Sensorless Control For A Permanent Magnet Synchronous Machine Driven By An Fpga Controlled Sic Inverter, Jared Walden

Masters Theses

As motor drive inverters continue to employ Silicon Carbide (SiC) and Gallium Nitride (GaN) devices for power density improvements, sensorless motor control strategies can be developed with field-programmable gate arrays (FPGA) to take advantage of high inverter switching frequencies. Through the FPGA’s parallel processing capabilities, a high control bandwidth sensorless control algorithm can be employed. Sensorless motor control offers cost reductions through the elimination of mechanical position sensors or more reliable electric drive systems by providing additional position and speed information of the electric motor. Back electromotive force (EMF) estimation or model-based methods used for motor control provide precise ...


Modeling And Evaluation Of Utility-Scale Microgrid Investment For Distribution System Planning, Ian Schomer 2021 University of Tennessee, Knoxville

Modeling And Evaluation Of Utility-Scale Microgrid Investment For Distribution System Planning, Ian Schomer

Masters Theses

The electrical distribution network faces two great challenges for the immediate future. First, increased affordability of distributed energy resources (DERs)—and advancing control technologies of inverters that interface them to the grid—have driven a shift from a passive to an active distribution network (ADN), which heightens the complexity of system management. Second, the increased frequency of severe weather events and increased potential for a cybersecurity attack necessitate the need for a resilient infrastructure that can respond adaptively to shutdowns within the system. Microgrids (MGs) present a promising framework both to provide hierarchal control of DERs and to increase resiliency ...


Adaptive Photochromism And Thermochromism Pv Panels " Theoretical Design ", Doha Jdeed 2021 Tartus University, Tartus, Syria

Adaptive Photochromism And Thermochromism Pv Panels " Theoretical Design ", Doha Jdeed

Journal of the Arab American University مجلة الجامعة العربية الامريكية للبحوث

This paper presents a theoretical study on the effects of visible sunlight on photovoltaic (PV) panels and the solar cells. It seemed that the red light has the most effect on the silicon solar cells. A theoretical study on the sunlight effects on the plants was done. It seemed that the more the blue light is, the greater and thicker the leaves will be and the shorter the stem will be. However, the red light is very important for flowering and blooming. This was confirmed by an experimental study on a sweet basil plant. The experimental results show that confirming ...


Afloat 2021: American Floating Offshore Wind Technical Summit, Advanced Structures and Composites Center 2021 The University of Maine

Afloat 2021: American Floating Offshore Wind Technical Summit, Advanced Structures And Composites Center

General University of Maine Publications

Email invitation to the "AFloat 2021: American Floating Offshore Wind Technical Summit" scheduled for September 8 and 9, 2021. Due to the emergence of COVID variants and the health risks they pose, a decision was made to hold the event virtually to ensure everyone's safety.


An Improved Earned Value Management Method Integrating Quality And Safety, Brian Briggs 2021 Louisiana State University and Agricultural and Mechanical College

An Improved Earned Value Management Method Integrating Quality And Safety, Brian Briggs

LSU Doctoral Dissertations

The construction industry invests significant time and money to improve quality and safety while reducing cost and schedule impacts. The industry has a sincere desire to improve construction project management methods to improve efficiency. Historically, quality and safety underperformances result from undermanaged quality control and safety activities. The cost and schedule impacts associated with poor quality work have always had an impact on construction operations. The unprecedented challenges and uncertainties of COVID-19 highlighted the need to improve the Earned Value Management (EVM) method within construction to reflect these quality and safety activities. The central goal of this dissertation is to ...


Lyapunov Function-Based Stabilizing Control Scheme For Wireless Power Transfer Systems With Lcc Compensation Network, Abu Shahir Md Khalid Hasan 2021 Louisiana State University and Agricultural and Mechanical College

Lyapunov Function-Based Stabilizing Control Scheme For Wireless Power Transfer Systems With Lcc Compensation Network, Abu Shahir Md Khalid Hasan

LSU Master's Theses

A stabilizing control scheme based on a Lyapunov function is proposed for wireless power transfer (or WPT) systems. A state-space model of the WPT system is developed and the Lyapunov function is formulated based on an energy equation of the system involving state variables. The internal resistance of a battery varies during charge and discharge. Therefore, if a WPT system is used to charge a battery, its output load will vary. Furthermore, the coupling coefficient between the transmitter (primary) and receiver (secondary) coils decreases when they are misaligned. Comparative case studies are conducted to verify the efficacy of the proposed ...


Demanda Energética Del Sistema De Transporte Masivo Transmilenio En El Horizonte De Largo Plazo 2020 - 2040, Carlos Sebastian Castro Castro 2021 Universidad de La Salle, Bogotá

Demanda Energética Del Sistema De Transporte Masivo Transmilenio En El Horizonte De Largo Plazo 2020 - 2040, Carlos Sebastian Castro Castro

Ingeniería Eléctrica

El proyecto propuesto parte de la necesidad de dimensionar la demanda energética del Sistema Transmilenio y la cuantificación en la reducción de emisiones de este, según la creciente demanda en el servicio del sistema con un horizonte a largo plazo. Razón por la cual la información y análisis que se pueden extraer de este proyecto servirían de gran apoyo para la toma de decisiones a los encargados de la administración energética, ambiental y de movilidad de la ciudad; así como servir de referente para la implementación de estudios similares en grandes ciudades con características demográficas, económicas, sociales y ambientales análogas ...


Metodología De Comparación De Eficiencias En Sistemas Híbridos Off-Grid., Cristian Kevin Aguilar Lozano 2021 Universidad de La Salle, Bogotá

Metodología De Comparación De Eficiencias En Sistemas Híbridos Off-Grid., Cristian Kevin Aguilar Lozano

Ingeniería Eléctrica

Debido al crecimiento de la generación de energía renovable se requiere estudios relacionados a su eficiencia ya que es uno de los tópicos en los que aún las fuentes convencionales son superiores. Los estudiantes de la universidad de La Salle están interesados en desarrollar proyectos de investigación que permitan generar conocimientos aplicativos por lo que se propone comparar las eficiencias de diferentes sistemas de gestión de energía basados en las topologías híbridas haciendo uso de convertidores DC/DC que permita una flexibilidad en la tensión de salida; Hasta el momento se han realizado estudios para obtener ecuaciones de la eficiencia ...


Electricity Market Operations With Massive Renewable Integration: New Designs, Shengfei Yin 2021 Southern Methodist University

Electricity Market Operations With Massive Renewable Integration: New Designs, Shengfei Yin

Electrical Engineering Theses and Dissertations

Electricity market has been transitioning from a conventional and deterministic operation to a stochastic operation under the increasing penetration of renewable energy. Industry-level solutions toward the future electricity market operation ask for both accuracy and efficiency while maintaining model interpretability. Hence, reliable stochastic optimization techniques come to the first place for such a complex and dynamic problem.

This work starts at proposing a solution strategy for the uncertainty-based power system planning problem, which acts as a preliminary and instructs the electricity market operation. Considering 100% renewable penetration in the future, it analyzes the cost-effectiveness of renewable energy from a long-term ...


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