Searched for: author:"Smit, J.J."
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Wu, J. (author), Smit, J.J. (author), Mor, A. R. (author)
In practice, High-voltage (HV) cables are occasionally exposed to impulse and superimposed transient conditions, which may initiate partial discharges (PD) temporarily. Whether such PDs persist under AC voltage after the transient conditions have vanished, is at focus in the research described in this paper. Since for cross-linked polyethylene ...
journal article 2020
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Purnomoadi, A.P. (author), Rodrigo Mor, A. (author), Smit, J.J. (author)
This article contains the development of the Health Index (HI) and the Risk Assessment (RA) models for Gas Insulated Switchgear (GIS) operating under tropical conditions. A case study of 631 bays of GIS in tropics with service time from 1 up to 30 years is used during the development of the models. The basis for the HI model is the condition...
journal article 2019
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Wu, J. (author), Mor, A. R. (author), van Nes, P.V.M. (author), Smit, J.J. (author)
A partial discharge (PD) measuring system has been deployed in order to identify and measure PD in a high voltage (HV) cable joint under impulse and superimposed voltages under laboratory conditions. The challenge is to enable the detection of PD during the impulse conditions. The method of measurement has been investigated by introducing an...
journal article 2019
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Purnomoadi, A.P. (author), Rodrigo Mor, A. (author), Smit, J.J. (author)
Humid insulating gas (SF6) has been observed in a case study of 631 CB-bays of Gas Insulated Switchgear (GIS) operating under tropical conditions. The routine gas quality check in the case study reported that 20% of the non-Circuit Breaker enclosures have humidity above the value recommended by the IEEE and IEC standards. Therefore, an...
journal article 2019
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Wu, J. (author), Mor, A. R. (author), Smit, J.J. (author)
In practice, cross-linked polyethylene (XLPE) power cables can be subjected to alternating voltage with superimposed impulse transients. Such impulse transients may initiate partial discharges (PD) in insulation defects even below AC inception voltage. An initiated PD may persist under AC, which will cause insulation degradation. This paper...
journal article 2019
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Marx, Philipp (author), Wanner, Andrea (author), Zhang, Zucong (author), Jin, H. (author), Tsekmes, I.A. (author), Smit, J.J. (author), Kern, Wolfgang (author), Wiesbrock, Frank (author)
Five types of nanofillers, namely, silica, surface-silylated silica, alumina, surface-silylated alumina, and boron nitride, were tested in this study. Nanocomposites composed of an epoxy/amine resin and one of the five types of nanoparticles were tested as dielectrics with a focus on (i) the surface functionalization of the nanoparticles and (ii...
contribution to periodical 2017
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Ross, Robert (author), Gholizad, B. (author), Koopmans, Gerben (author), Mousavi Gargari, Shima (author), Smit, J.J. (author), Ghaffarian Niasar, M. (author), Meijer, Cees G. (author), Bucurenciu, Ana-Maria (author)
High current capability, good integration in urban area and zero external magnetic field are advantages of HTS cables that make them interesting for implementation in the Netherlands. So far experience with HTS cable projects is good, but still limited. Yet there is a need for a proper testing practice. Due to limited operational experience,...
conference paper 2017
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Fimberger, M. (author), Tsekmes, I.A. (author), Kochetov, R. (author), Smit, J.J. (author), Wiesbrock, F. (author)
Poly(2-nonyl-2-oxazoline)80-stat-poly(2-dec-9?-enyl-2-oxazoline)20 and poly(2-dec-9?-enyl-2-oxazoline)100 can be synthesized from the cationic ring-opening polymerization of monomers that can be derived from fatty acids from renewable resources. These (co)poly(2-oxazoline)s can be crosslinked with di- and trifunctional mercapto compounds using...
journal article 2015
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Tsekmes, I.A. (author), Morshuis, P.H.F. (author), Smit, J.J. (author), Kochetov, R. (author)
In this study, epoxy-cubic boron nitride composites are fabricated, and their dielectric response is investigated. They exhibit the same trend as epoxy composites reinforced with other filler types. Thus, at low filler concentrations, they exhibit a lower relative permittivity than neat epoxy. As the fill grade further increases, the relative...
journal article 2015
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Mehairjan, R.P.Y. (author), Zhuang, Q. (author), Djairam, D. (author), Smit, J.J. (author)
The electrical power sector is stimulated to evolve under the pressures of the energy transition, the deregulation of electricity markets and the introduction of intelligent grids. In general, engineers believe that technologies such as monitoring, control and diagnostic devices, can realize this evolvement smoothly. Unfortunately, the...
conference paper 2014
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Zuijderduin, R. (author), Chevtchenko, O. (author), Smit, J.J. (author), Aanhaanen, G. (author), Ross, R. (author)
The electricity grid of the Netherlands is changing. There is a call of society to use more underground cables, less overhead lines (OHL) and to reduce magnetic emissions. At the same time, parts of the future transmission grid need strengthening depending on the electricity demand in the coming decades [1]. Novel high temperature superconductor...
conference paper 2014
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Zuijderduin, R. (author), Chevchenko, O. (author), Smit, J.J. (author), Aanhaanen, G. (author), Melnik, I. (author), Geschiere, A. (author)
ue to increasing power demand, the electricity grid of the Netherlands is changing. The future transmission grid will obtain electrical power generated by decentralized renewable sources, together with large scale generation units located at the coastal region. In this way electrical power has to be distributed and transmitted over longer...
journal article 2012
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Zuijderduin, R. (author), Chevtchenko, O. (author), Smit, J.J. (author), Aanhaanen, G. (author), Melnik, I. (author), Geschiere, A. (author)
Due to increasing power demand, the electricity grid of the Netherlands is changing. The future grid must be capable to transmit all the connected power. Power generation will be more decentralized like for instance wind parks connected to the grid. Furthermore, future large scale production units are expected to be installed near coastal...
journal article 2012
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Zuijderduin, R. (author), Chevtchenko, O. (author), Smit, J.J. (author), Willen, D. (author), Melnik, I. (author), Geschiere, A. (author)
The future electricity grid will be more sustainable and it will have more power transmission and distribution capability with more electrical power added from decentralized sources on distribution level and from wind parks and other large sources on transmission level. More interconnections and more underground transmission and distribution...
journal article 2012
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Smit, J.J. (author), Andritsch, T. (author), Chevtchenko, O.A. (author)
Assets in high voltage technology have to meet harsh service conditions over long lifetimes of 40 years or more. Due to environmental concerns, substitution of conventional insulating materials becomes a necessity. Because robustness and sustainability are serious requirements, only few new materials are really breaking through. At present some...
journal article 2012
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Kochetov, R. (author), Korobko, A.V. (author), Andritsch, T. (author), Morshuis, P.H.F. (author), Picken, S.J. (author), Smit, J.J. (author)
In this paper the thermal conductivity of epoxy-based composite materials is analysed. Two and three-phase Lewis–Nielsen models are proposed for fitting the experimental values of the thermal conductivity of epoxy-based polymer composites. Various inorganic nano- and microparticles were used, namely aluminium oxide, aluminium nitride, magnesium...
journal article 2011
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Chevtchenko, O.A. (author), Smit, J.J. (author), Geschiere, A. (author)
Cryostat for a high-temperature superconducting power cable, comprising concentric tubes, an annular region between said tubes, wherein a multilayer thermal insulation and getter material for supporting high vacuum conditions are provided in said annular region, and wherein the multilayer insulation comprises reflective layers separated by...
patent 2010
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Bajracharya, G. (author), Koltunowicz, T. (author), Negenborn, R.R. (author), Papp, Z. (author), Djairam, D. (author), De Schutter, B. (author), Smit, J.J. (author)
In this paper, a model predictive framework is used to optimize the operation and maintenance actions of power system equipment based on the predicted health sate of this equipment. In particular, this framework is used to predict the health state of transformers based on their usage. The health state of a transformer is hereby given by the hot...
report 2009
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Bajracharya, G. (author), Koltunowicz, T. (author), Negenborn, R.R. (author), Papp, Z. (author), Djairam, D. (author), De Schutter, B. (author), Smit, J.J. (author)
In this paper, a model-predictive control based framework is proposed for modeling and optimization of the health state of power system equipment. In the framework, a predictive health model is proposed that predicts the health state of the equipment based on its usage and maintenance actions. Based on the health state, the failure rate of the...
conference paper 2009
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Cichecki, P. (author), Jongen, R.A. (author), Gulski, E. (author), Smit, J.J. (author), Quak, B. (author), Petzold, F. (author), De Vries, F. (author)
journal article 2008
Searched for: author:"Smit, J.J."
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