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 168 for “"Power Quality"”.
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Power quality prediction based on determination of supply impedance
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1996.
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Probabilistic assessment of the impact of plug-in electric vehicles on power quality in electric vehicles on power quality in electric distribution systems.
… electric distribution system may pose potential power quality problems due to the uncertainties in the number of these vehicles, their charging time and locations. Several power quality phenomena such as voltage deviations, voltage imbalance, transformer overload and unbalance are investigated in …
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A novel electric power quality monitoring system for transient analysis
… ensure its reliability and supply, an electric power monitoring system is indispensable in an electric power system. Currently, most electric power monitoring systems are designed for steady-state monitoring only. They may not be able to monitor instantaneous power disturbances, such as voltage …
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Metrology Infrastructure for Energy and Power Quality in DC Railway Systems
L'abstract è presente nell'allegato / the abstract is in the attachment
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Novel Control Algorithms for Power Quality Improvement Using Four-Leg Converter
… the neutral conductors, and damaging the power generating sources. Such problems further aggravate by degrading the active power flow capacity of the distributing system with leading or lagging power-factor currents in the presence of reactive loads. A shunt converter, such as a four-leg …
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Power Quality and Unbalanced Conditions Assessment Based on Digital Fault Recorders
With the rapid development of power systems, more and more smart devices are installed in power industries, and each of them is gathering tons of information every day.Due to the data explosion and the difficulty of processing these data, data visualization, a big data technology, has become a …
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Power quality impacts of the low carbon evolution within modern distribution networks
This thesis explores the contemporary and future power quality context of low carbon technologies within the distribution networks of the United Kingdom. The work was conducted in parallel with a series of research activities undertaken as part of Ofgem’s Low Carbon Network Fund project, entitled …
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Smart grid analysis with particular references to power quality and load forecast
… on development of a new approach to deal with power quality problem. Wavelet Transform (WT) is used for the new approach. Complex Morlet Wavelet (CMW) is selected for the new approach introduced in this thesis. The proposed algorithm is able to identify all harmonic components including …
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Power Quality Analysis of a Three-Phase Cycloconverter Under Variable Operating Conditions
… between variable operating conditions and power quality parameters for a three-phase to single-phase cycloconverter. The cycloconverter is examined in its most straightforward form without additional output filters or elaborate control methods. Variable operating conditions include input …
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Digital signal processing techniques for improving the automatic classification of power quality events.
… of digital signal processing techniques in the power quality automatic classification field, and thus, proposes an optimized automatic monitoring system with an improved accuracy. The proposed monitoring system involves three main sections: detection of the power quality events, extraction of …
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Integration of wind energy systems into the grid: power quality and technical requirements
… there are over 7 000 MW potential ideas for wind power in the Western Cape alone and this is a clear indication that there is a growing interest in wind development locally. The Government has also set a 4% target for the development of the renewable energy in the country by 2013. In light of the …
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Grid Power Quality with FACTS Devices and Renewable Energy Sources Using Deep Learning Algorithms
… use many sensitive devices comprised of power electronics that are quite sensitive to power quality (PQ) disturbances in the supply network. From worldwide customer surveys, complaints on PQ related disturbances, such as harmonics, voltage dips, flicker, etc., are increasing every year. …
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Design and development of intelligent computational techniques for power quality data monitoring and management
The most important requirement of power system operations is sustained availability and quality supply of electric power. In Electrical Power Distribution System (EPDS), non-linear loads are the main cause of power quality (PQ) degradation. The PQ problems generated by these non-linear loads are …
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Power Sharing and Power Quality Improvement in Parallel Connected Power Converters in the Microgrid
Power electronics-based Voltage Source Converters (VSCs) have been widely used as an interface between energy source and the grid/load in microgrid system. The VSCs are required not only to provide the basic function that achieves reliable and accurate power sharing in a microgrid, but also to …
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Power quality enhancement in electricity networks using grid-connected solar and wind based DGs
… impacts posed by conventional fossil fuel-based power generation. The prominent DG technologies which are capable of meeting bulk energy demands and are clean energy sources are wind and solar energy sources. The resources for solar and wind based DG are available in abundance in most …
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Impact assessment of large-scale penetration of permanent magnet synchronous generators on power quality
Wind power generation has gained a large share in the renewable energy market over the past few years. This study investigates the impact of large scale penetration of permanent magnet synchronous generator (PMSG) based wind turbines on power quality of the grid. PMSGs are attractive due to the …
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Ultracapacitor character analysis and its application in unified power quality conditioner as energy storage system
… analysis and its application in Unified Power Quality Conditioner (UPQC) as an Energy Storage System (ESS) for improved UPQC performance. It includes three parts as described below. The first part is Paper I. The UCAP is a popular choice for the ESS because of its distinct characters. In …
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The power quality of wind turbines in Sout Africa and their impacts on distribution networks
This thesis describes an investigation into the power quality of wind turbines and the impacts this could have on distribution networks. The main focus is on voltage fluctuations and flicker as grid connected wind turbines could have a huge impact on these, especially when connected to weak …
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Assesment of renewable energy resources and the impact of DG on power quality in distribution network
For many years, power systems were vertically operated; large power generation plants produced all of the electrical power. This kind of generation is often related to adequate geographical placement such as water sources, coal sources etc. The power is then transmitted towards large consumption …
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