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IEEE Transactions on Dielectrics and Electrical Insulation

Issue 6 • Date Dec. 2004

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Displaying Results 1 - 25 of 26
  • Statistical evaluation of water tree lengths in XLPE cables at different temperatures

    Publication Year: 2004, Page(s):995 - 1006
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2382 KB) | HTML iconHTML

    Accelerated aging of two types of commercially produced medium voltage XLPE insulated cables was carried out under the combined stresses of three types consisting of ionic aqueous species, elevated electrical stress and temperature cycling. After 1000 h of aging, the water tree parameters were evaluated. Results show that external ionic species exert profound impact on the generation of bow tie an... View full abstract»

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  • Electrical treeing in hexagonal ice crystals under applied impulse voltage

    Publication Year: 2004, Page(s):939 - 945
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1740 KB) | HTML iconHTML

    Using two hexagonal samples of ice, polycrystalline and single-crystalline, the electrical treeing has been investigated under an applied impulse voltage. The crystallinity and temperature of the ice play an important role in the events of the treeing. In the single-crystalline ice, the tree in the samples at -25 °C always progressed along the basal plane of the ice crystal, but at -196 °C... View full abstract»

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  • Analysis of the effects of end connection quality on the dielectric loss of metallized film capacitors

    Publication Year: 2004, Page(s):990 - 994
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (832 KB) | HTML iconHTML

    Plasma sprayed metal end connections of metallized film capacitors are the weak link for pulse power applications which involve discharge times of tens of microseconds and less. This problem will only get worse with increased capacitor energy density. The present contribution quantifies the relationship between the "quality" of the end connection and dielectric loss of the capacitor winding. The a... View full abstract»

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  • Measurement of surface charge on opposite sides of a planar insulator using an electrostatic probe

    Publication Year: 2004, Page(s):919 - 928
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2486 KB) | HTML iconHTML

    A digital image processing technique using the Fourier transformation in the spatial domain and the Wiener filter has been developed. This method is applied to the measurement of the accumulated charge on the opposite sides of a planar insulator using an electrostatic probe. In the spatial frequency domain, the relational equations between the probe outputs and charge distribution are given by the... View full abstract»

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  • Electrically induced heat dissipation in metallized film capacitors

    Publication Year: 2004, Page(s):1007 - 1013
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (953 KB) | HTML iconHTML

    Elevated temperature is a key aging factor for metallized polymer film capacitors with the capacitor life expectancy halved with every 8°C of temperature rise. For film capacitors in service, both application of a time-varying external voltage and the extinction of internal breakdown events can deposit significant heat onto the capacitor structure leading to an undesirable temperature rise. Of... View full abstract»

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  • Simple theoretical estimation of the dielectric strength of gases

    Publication Year: 2004, Page(s):946 - 948
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (829 KB) | HTML iconHTML

    Understanding how a gas is able to strongly insulate electric devices is certainly of great importance to the electrical engineering community. More precisely, modeling how a dielectric gas stops an electric current requires to understand what makes a gas a good dielectric, or in other words, what makes a gas presenting a high dielectric strength (DS). We show how to easily estimate the DS of a ga... View full abstract»

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  • Charge distribution measurement on a truncated cone spacer under DC voltage

    Publication Year: 2004, Page(s):929 - 938
    Cited by:  Papers (26)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2093 KB) | HTML iconHTML

    A system for measuring charge distribution on an insulating spacer is developed. An electrostatic probe is set close to the spacer, and it moves along its surface maintaining a small gap. The accumulated charge is inversely calculated from the measured data by utilizing the relationship that is obtained through the numerical electric field computation. Using this system, the surface charge distrib... View full abstract»

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  • Solution of low frequency complex fields in insulating systems

    Publication Year: 2004, Page(s):1014 - 1025
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (734 KB) | HTML iconHTML

    A method to calculate the low frequency complex electric field in high voltage heterogeneous dielectric systems is proposed. The method is based on the power series method of analysis developed by R.M. Fano et al. by neglecting the electric field induced by variations of the magnetic field. The proposed method is verified by applying it to plane, cylindrical and spherical capacitors whose analytic... View full abstract»

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  • Dielectric strength coordination and generalized spacer design rules for HVAC/DC SF6 gas insulated systems

    Publication Year: 2004, Page(s):949 - 963
    Cited by:  Papers (19)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1399 KB) | HTML iconHTML

    The problems of HVAC/DC gas insulated systems (GIS) dielectric strength coordination and support spacers design criteria are discussed in this paper. The most important challenge is to protect the spacers against flashover and consequently exclude them from consideration when coordinating an insulation of GIS. Both experimental and numerical studies demonstrate that electric field formation mechan... View full abstract»

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  • A fuzzy ARTMAP fault classifier for impulse testing of power transformers

    Publication Year: 2004, Page(s):1026 - 1036
    Cited by:  Papers (17)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (830 KB) | HTML iconHTML

    The work presents an artificial intelligence (AI) based impulse test technique for oil filled power transformers. Determination of exact nature and location of faults, during impulse testing of large power transformer is of practical importance to the transformer manufacturers as well as designers. The presently available impulse test techniques more or less depend on expertise of the test personn... View full abstract»

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  • Electrode-spacer contour optimization by ANN aided genetic algorithm

    Publication Year: 2004, Page(s):964 - 975
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1256 KB) | HTML iconHTML

    Optimization of contours of three dimensional electrode-spacer arrangements used in gas insulated systems (GIS) has been carried out by ANN aided genetic algorithm (GA) to obtain desirable electric stress distribution along the insulator surface. Two cases have been studied and reported in detail. Multilayer feed-forward neural networks with error back-propagation algorithm have been applied to ac... View full abstract»

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  • Causes and potential remedies of brittle fracture failure of composite (nonceramic) insulators

    Publication Year: 2004, Page(s):1037 - 1048
    Cited by:  Papers (24)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2252 KB) | HTML iconHTML

    Existing brittle fracture models have been reviewed and their applicability to explain the in-service brittle fracture failure of composite (nonceramic) insulators is evaluated. It is shown that the only brittle fracture model that can explain all aspects of the brittle fracture process is a model based on the formation of nitric acid solutions in-service. The chemical cause of brittle fracture is... View full abstract»

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  • A study of electric stress enhancement. Part 1. Implication in power cable design

    Publication Year: 2004, Page(s):976 - 982
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (961 KB) | HTML iconHTML

    The increase in electric stress due to a surface protrusion at the interface between a semiconductive shield and a polymer insulation layer in power cables can lead to localized electron injection into the polymer insulation and result in undesired material degradation. This paper reports the analyses of electric stress enhancement of surface protrusions in several commonly encountered medium- and... View full abstract»

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  • New methodology for surface potential decay measurements: application to study charge injection dynamics on polypropylene films

    Publication Year: 2004, Page(s):1049 - 1056
    Cited by:  Papers (47)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (792 KB) | HTML iconHTML

    Our work shows, through measurements on polypropylene films, the validity of surface potential measurements as a technique for dielectric properties analysis. We propose a representation of the decay and potential return curves that separates different components of dielectric response, by using tdv/dt vs log t plots. Using this transformation, and varying some experimental conditions we have iden... View full abstract»

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  • A study of electric stress enhancement. Part 2. Stress enhancement on semiconductive shields

    Publication Year: 2004, Page(s):983 - 989
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (795 KB) | HTML iconHTML

    For pt.I see ibid., vol.11 p.976-82, (2004).This paper evaluates the electric stress enhancement due to surface protrusions on the tape of semiconductive shield compounds used in power cables. The results of a conventional grade and a supersmooth grade shield compounds are reported. Using a laser-scanning instrument, the shape of protrusions on the tape surface of these compounds can be quantitati... View full abstract»

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  • Application of very-high-frequency (VHP) method to ceramic insulators

    Publication Year: 2004, Page(s):1057 - 1064
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1016 KB) | HTML iconHTML

    A VHF method (30-300 MHz) is applied to identify faults and defects in ceramic insulators. Insulators which exhibit internal cracks and fractures are used as test samples. Different artificial conditions are introduced to the test samples according to the IEC 507 standard under wet and dry conditions. Using a cascading signal processing technique and analysis methods such as FFT and fractal analys... View full abstract»

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  • Corona and breakdown characteristics between sphere electrode with a protrusion and plane electrode under negative pulse voltage in N2 gas

    Publication Year: 2004, Page(s):1065 - 1072
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1659 KB) | HTML iconHTML

    Corona and breakdown characteristics for a configuration of a sphere with a needle and a plane in N2 gas are studied. The protrusion was used to simulate a metallic particle attached to a high voltage conductor surface in power apparatus. The corona and breakdown characteristics depend on the vertical distance between the needle tip and the bottom sphere. It was observed that the breakd... View full abstract»

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  • IEEE Transactions on Dielectrics and Electrical Insulation

    Publication Year: 2004, Page(s): 0_1
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  • IEEE Transactions on Dielectrics and Electrical Insulation

    Publication Year: 2004, Page(s): 0_2
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  • On line submission of papers

    Publication Year: 2004, Page(s):917 - 918
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  • Call for papers

    Publication Year: 2004, Page(s): 1073
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  • Call for papers

    Publication Year: 2004, Page(s): 1074
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  • IEEE Transactions on Dielectrics and Electrical Insulation Index

    Publication Year: 2004, Page(s):1075 - 1097
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  • IEEE copyright form

    Publication Year: 2004, Page(s):1098 - 1099
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  • IEEE Dielectrics and Electrical Insulation Society

    Publication Year: 2004, Page(s): 1100
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Aims & Scope

IEEE Transactions on Dielectrics and Electrical Insulation contains topics that are concerned with dielectric phenomena and measurements, with development and characterization of gaseous, vacuum, liquid and solid electrical insulating materials and systems; and with utilization of these materials in circuits and systems under condition of use. 

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Editor-in-Chief
Reuben Hackam