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Physical Sciences and Mathematics Commons™
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Full-Text Articles in Physical Sciences and Mathematics
Transient Control Of Synchronous Machine Active And Reactive Power In Micro-Grid Power Systems, Luke Gerard Weber
Transient Control Of Synchronous Machine Active And Reactive Power In Micro-Grid Power Systems, Luke Gerard Weber
Theses and Dissertations
There are two main topics associated with this dissertation. The first is to investigate
phase–to–neutral fault current magnitude occurring in generators with multiple zero–sequence
current sources. The second is to design, model, and tune a linear control system for oper-
ating a micro–grid in the event of a separation from the electric power system.
In the former case, detailed generator, AC8B excitation system, and four–wire electric
power system models are constructed. Where available, manufacturers data is used to
validate the generator and exciter models. A gain–delay with frequency droop control
is used to model an internal combustion engine and governor. …
A New Paradigm Of Maximizing The Wind And Solar Penetration– A Economical Assessment, Yuming Chen
A New Paradigm Of Maximizing The Wind And Solar Penetration– A Economical Assessment, Yuming Chen
Theses and Dissertations
Wind and solar energies are the most potential and widely-used renewable energies. But in most cases these energies cannot be maximized because of transmission line capacity and their remote location. Therefore, this thesis proposes a new paradigm which using battery transportation and logistics instead of transmission line, to maximize wind and solar energies. The main focus of this work is to investigate the economical feasibilities of this new paradigm.
In the first part, different models and application are presented. The purpose is finding an appropriate model which can make full use of existing grid resources such as transmission line and …
The Effects Of Geomagnetic Disturbances On Electrical Power Systems, Benjamin J. Hynes
The Effects Of Geomagnetic Disturbances On Electrical Power Systems, Benjamin J. Hynes
Theses and Dissertations
Solar storms that generate coronal mass ejections are a cause for concern due to the damage that they cause in high voltage power grids. Geomagnetically induced currents can be introduced onto the grid and cause many adverse effects. The vulnerability of the bulk electric power systems to such events has increased during the past few decades because the power system transmission lines have become more interconnected and have increased in length. Real and reactive power flows, voltage fluctuations, frequency shifts, undesired relay operations, higher order harmonic currents, undesired damage to assets and failure of assets are all possible outcomes from …
Design And Optimization Of Hybrid Energy Storage For Photovoltaic Power Fluctuation Smoothing Based On Frequency Analysis, Ruirui Yang
Theses and Dissertations
A proper design of energy storage system (ESS) can effectively smooth the photovoltaic (PV) output power fluctuation, lower the cost, and improve the power quality and stability.
According to the response characteristics of different energy storage equipment, an optimal hybrid EES sizing method is proposed based on frequency analysis. A hybrid ESS including lead-acid battery, lithium battery and electric double-layer capacitor (EDLC) is selected to smooth out PV power fluctuation and meet both power and energy requirement of the power grid. Fast Fourier Transform (FFT) method is applied for analyzing the spectrum of unwanted PV fluctuation. From the FFT analysis, …