Searched for: contributor%3A%22Smit%2C+J.J.+%28promotor%29%22
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Wu, J. (author)
Occasionally sporadic defects in high voltage cable insulation may escape from detection by commissioning or maintenance tests. Usually these tiny defects will not initiate significant partial discharges or cause breakdown in the cable insulation system under normal AC operating condition and normal transient situations. However, nowadays more...
doctoral thesis 2020
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Purnomoadi, A.P. (author)
Following deregulation in the energy sector during the 1990s, which was also triggered by the ageing of infrastructure and the increasing demands from regulators and customers, many network utilities adopted the Asset Management (AM) in the hope to earn more, have better credit ratings and gain from stock prices. In line with this fact, the...
doctoral thesis 2020
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Cichecki, P (author)
The thesis focuses on on-site testing and diagnosis of transmission power cables circuits. Based on the application of methods for on-site voltage generation and its use for advanced diagnosis, comprehensive testing and diagnostic procedures have been investigated in this thesis.
doctoral thesis 2018
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Al-Suhaily, M. (author)
doctoral thesis 2018
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van der Born, D. (author)
doctoral thesis 2017
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Mehairjan, R.P.Y. (author)
Presently, maintenance management of assets in infrastructure utilities such as electricity, gas and water are widely undergoing changes towards new working environments. These are mainly driven against the background of stringent regulatory regimes, an ageing asset base, increased customer demands and constrained financial resources. Therefore,...
doctoral thesis 2016
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Zuijderduin, R. (author)
Worldwide there is an increasing need for a more sustainable form of electrical power delivery with a growing share of renewable energy generation. In the distribution and transmission network, large-scale and small-scale wind and solar power plants will be introduced, in proportion to the annual economic growth. The transmission and...
doctoral thesis 2016
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Tsekmes, I.A. (author)
The addition of microsized fillers to polymers, in order to tailor their properties, has been extensively used in many industrial applications since the 1960s. The same approach applies to the field of electrical insulation. Epoxy resin is a widely used polymer in the electrical power sector, but it is usually loaded with microsized fillers,...
doctoral thesis 2016
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Zhuang, Q. (author)
Should risks always be quantified before being managed? The answer is “yes” in the opinion of most asset managers in today’s electricity transmission and distribution companies, but “no” in modern theories of risk management. When the risks refer to reliability hazards of high-voltage assets, the answer to the above question is “yes, it should...
doctoral thesis 2015
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Jin, H. (author)
In many applications of high voltage engineering, electrical and thermal stresses increase due to an ongoing decrease of product dimensions. In particular, the electrical industry is interested in applying nanofluids in transformers to be able to decrease transformer size and weight. The requirement for nanofluids is to enhance the electrical...
doctoral thesis 2015
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Bajracharya, G. (author)
The electricity grid is one of the most complex systems created by human beings. It consists of an intricate network of components such as generators, transmission and distribution lines, transformers, breakers, various controllers, and various measurement and monitoring systems. The grid has been going through significant changes in past...
doctoral thesis 2014
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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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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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Jongen, R.A. (author)
Utilities are faced with aged infrastructures with an upcoming unavoidable replacement wave to maintain a high reliability. In this thesis a methodology is presented for the application of statistical lifetime management for network component populations in energy networks. The methodology describes the process to use network component lifetime...
doctoral thesis 2012
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Kochetov, R. (author)
The research described in this thesis is part of a state-funded IOP-EMVT project in cooperation with industrial companies, aiming at the design, assessment and implementation of new, environmental friendly (e.g. oil and SF6 - free) solid dielectric materials. A large disadvantage of solid polymer dielectrics is their relatively low thermal...
doctoral thesis 2012
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Erbrink, J.J. (author)
High-voltage transformers have tap changers to regulate the voltage in the high-voltage network when the load changes. Those tap changers are subject to different degradation mechanisms and need regular maintenance. Various defects, like contact degradation, often remain undetected and the probability of maintenance errors cannot be neglected....
doctoral thesis 2011
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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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Agoris, P.D. (author)
doctoral thesis 2009
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Djairam, D. (author)
Wind energy is converted to electrical energy by letting the wind move charged particles against the direction of an electric field. The advantage of this type of conversion is that no rotational movement, which occurs in conventional wind turbines, is required. An electrostatic wind energy converter (EWICON) has been developed. Charged...
doctoral thesis 2008
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Steenstra, H.T. (author)
The thesis deals with the behaviour, with respect to EMC (Electro Magnetic Compatibility), of cabling and wiring in buildings and installations. Measurement and calculation methods are developed and applied to cabling in a large scale installation as well as to individual cables. Besides, the location and interconnection of conductors,...
doctoral thesis 2008
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