Searched for: department%3A%22Electrical%255C%252BSustainable%255C%252BEnergy%22
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Van Elzakker, G. (author)
doctoral thesis 2010
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Yuan, Z. (author)
In modern power systems, there is a great demand to control the power flow actively. Power flow controlling devices (PFCDs) are required for such purpose, because the power flow over the lines is the nature result of the impedance of each line. Due to the control capabilities of different types of PFCDs, the trend is that mechanical PFCDs are...
doctoral thesis 2010
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Andritsch, T.M. (author)
Main goal of the research described in this PhD thesis was to determine the influences of filler size, material and distribution on the DC breakdown strength, permittivity and space charge behaviour of nanocomposites. This should lay the groundwork for tailored insulation materials for HVDC applications. Examples for this are medical and...
doctoral thesis 2010
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Cvoric, D. (author)
Increasing levels of fault currents in utility grids are expected to result in mechanical and thermal overstresses of different power system components. To cope with these increased levels, expensive upgrades and replacements of currently employed Circuit Breakers might be required in the near future. Fault Current Limiters (FCLs) are expected...
doctoral thesis 2010
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Wank, M.A. (author)
Our modern lifestyle is currently fueled by two billion years of accumulated energy reserves. For several years now there has been a strong rise in research interest and more recently also implementation of renewable energy sources in the European Union. Driving factors for these developments are the increasing awareness of global warming in our...
doctoral thesis 2011
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Jarolimek, K. (author)
Crystalline silicon is probably the best studied material, widely used by the semiconductor industry. The subject of this thesis is an intriguing form of this element namely amorphous silicon. It can contain a varying amount of hydrogen and is denoted as a-Si:H. It completely lacks the neat long range order of the crystal, yet its structure is...
doctoral thesis 2011
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Xyngi, I. (author)
doctoral thesis 2011
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Agbo, S.N. (author)
The need for electrical energy is growing fast as a result of the expanding world population and economic activities. On top of this the energy need of each individual is also growing. At present the growth in energy demand is not matched by the growth in energy generation because of insufficient energy production. This energy gap therefore...
doctoral thesis 2012
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Pharmatrisanti, A. (author)
For the past two decades, electricity utilities have struggled to provide high quality electrical power to their customers while keeping on spending effectively the expenses for operating and maintaining the power system. Unfortunately, under tropical conditions, operation circumstances affect the equipment so that either its lifetime is cut...
doctoral thesis 2012
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Van der Pijl, F.F.A. (author)
The thesis considers contactless electromagnetic energy transfer, applied to residential and office environments. The objective is to investigate and design a (partially) contactless residential energy distribution network system for multiple electrical devices with a highly improved end-user flexibility. A special focus is system efficiency.
doctoral thesis 2012
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Jäger, K. (author)
Nano-textured interfaces between two media of different refractive indices scatter light. The angular distribution and the intensity of the scattered light are deter- mined by the geometry of the nano-textures and the difference of the refractive indices of the two media. Thin-film silicon solar cells (TFSSC), which convert sunlight directly...
doctoral thesis 2012
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Isabella, O. (author)
Solar energy can fulfil mankind’s energy needs and secure a more balanced distribution of primary sources of energy. Wafer-based and thin-film silicon solar cells dominate todays’ photovoltaic market because silicon is a non-toxic and abundant material and high conversion efficiencies are achieved with silicon-based solar cells. To stay...
doctoral thesis 2013
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Ani, S.O. (author)
Wind energy accounts for an increasing percentage of the energy supplied to the electricity network. Electricity generation from wind is now cheaper than other renewables and almost cost competitive with other conventional sources of electricity generation. However, this impressive growth is largely due to advances in large wind turbines,...
doctoral thesis 2013
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Ramirez-Elizondo, L.M. (author)
The world’s increasing energy demand and growing environmental concerns have motivated scientists to develop new technologies and methods to make better use of the remaining resources of our planet. The main objective of this dissertation is to develop a scheduling and control tool at the district level for small-scale systems with multiple...
doctoral thesis 2013
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Baalbergen, J.F. (author)
Service interruptions have a significant impact on society and therefore the main objective of power system planning and operation is to ensure that they do not happen. Because voltage instability is one of the dynamic phenomena that may result in a system-wide blackout, this type of stability problem has been an important research topic for...
doctoral thesis 2013
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Sprenger, W. (author)
Building-integrated photovoltaic systems (BIPV) are able to improve the energy balance of buildings. However, this improvement can be analyzed quantitatively only if the electricity yield generated by the BIPV system is calculated. This PhD thesis presents a simulation program that calculates the electricity yield generated by BIPV systems,...
doctoral thesis 2013
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Chmura, L.A. (author)
Nowadays, utilities are confronted with assets reaching or even exceeding their designed life. This in turn, implies the occurrence of upcoming replacements to assure reliable network operation. In this thesis, the application of statistical tools for life-time and residual life assessment of high-voltage assets installed in a power network is...
doctoral thesis 2014
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Josifovic, I. (author)
Current PCB power converter construction technologies are based on the utilization of nonstandardized building blocks. Utilization of passive components with various shapes, poor thermal properties and mixed technology mounting (THT and SMT) represents fundamental limit for reaching high power density, effective thermal management, particular...
doctoral thesis 2014
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Teixeira Pinto, R. (author)
When large amounts of electricity need to be transported for long distances, or when underground or submarine cables are involved, using direct current high-voltage transmission systems is more efficient and cost effective than using traditional high-voltage alternating current transmission. Therefore, the main thesis objective is to study to...
doctoral thesis 2014
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Thomas, W. (author)
The growing energy consumption of lighting as well as rising luminous efficacies and -fluxes of high-power Light Emitting Diodes (LEDs) have contributed to the widespread use of LEDs in modern lighting systems. One of the most prominent users of the LED-technology is automotive (exterior) lighting. It benefits from LEDs’ high efficiencies and...
doctoral thesis 2014
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