Searched for: contributor%3A%22Morshuis%2C+P.H.F.+%28mentor%29%22
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Irahhauten, N. (author)
The manufacturing process of high voltage power transformers consists of several phases such as design, assembly, drying and impregnation process which are time consuming. Before electrical testing, a transformer needs an extra standing time for further impregnation of cellulose material in particular those of high density. It should be noted...
master thesis 2015
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Saha, D. (author)
This project investigates the effect of addition of h-BN (hexagonal boron nitride) nano-particles, of size about 70 nm, to epoxy resin, cast in the form of thin circular plaques, varying in thickness from 0.46 mm minimally till 0.56 mm maximally. Different filler concentrations by volume% have been chosen, with the lowest as 0.2 volume% till the...
master thesis 2015
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Piccin, R. (author)
Nowadays, Gas Insulated Substations (GIS) are vital nodes of the Transmission Network due to their compact dimensions permitted by the use of SF6 as insulating medium and the high reliability guaranteed. Nonetheless, the strictly requirements of safety in operation and continuous power supply catalyse the attention to improve the reliability and...
master thesis 2013
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Kanas, V. (author)
During the last 50 years electricity demand has significantly increased. Large amounts of electricity are transported from the generation to the consumption sites. Overhead lines or underground cables are used to transport the required energy. High voltage levels are used to reduce the transmission losses. Power transformers are responsible for...
master thesis 2013
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Bhuyan, R. (author)
Power transformers are inseparable parts of the power system and the tap changer is an equally necessary part of the transformer. In order to keep the availability of power systems high, the reliability of the transformers must be improved. This can be done by improving the reliability of the tap changer, as tap changer failures are the cause...
master thesis 2013
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Singuran, A.I. (author)
For determining the insulation dimensions, Smit Transformers uses a so called “design curve”. As the oil-impregnated paper insulation of the windings has been improved, a new design curve has to be established. A number of different types of transformer winding samples were subject to lightning impulse tests. The breakdown voltages measured from...
master thesis 2012
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Tsekmes, I.A. (author)
The world’s first commercial High Voltage Direct Current (HVDC) transmission link was built in 1954 between the Swedish mainland and the island of Gotland. At that time, it was proved that HVDC transmission is technically feasible. Since then, HVDC cable systems have been used worldwide in electrical energy transportation. Most HVDC...
master thesis 2012
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Van der Born, D. (author)
Polymeric insulation materials have not been used in HVDC cable systems until recently. The main cause of this being the tendency of polymers to deplete accumulated charge very slowly. Research into the dynamics of space charge trapping, injection and conduction in polymers can reveal important information from which new materials can be...
master thesis 2011
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De Haas, M.M.P. (author)
In this study the term smart grid is specified toward online diagnostics. It is investigated which online diagnostics techniques fit well within smart grids and whether existing technologies can be used in a smarter way. Smart grids and online diagnostics Since 2005, the term smart grids is widely used in literature. To assess what smart grid...
master thesis 2011
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Yuliastuti, E. (author)
The world’s energy requirement has been dominated by petroleum oil for centuries in many application fields, including transportation, household, and electricity. Mineral oil as an important insulating material in transformers has been used more than 150 years. Mineral oil application in power system equipment can be potentially hazardous to the...
master thesis 2010
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Gebrekiros, Y.T. (author)
This thesis deals with characterization of epoxy nanocomposites with different filler types and filler percentages by performing space charge measurements and DC ramp breakdown tests. The space charge measurements were performed at three field levels (10, 15, and 18 kV/mm) using the PEA method. The results were then analyzed. In addition to this...
master thesis 2009
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