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IEEE Transactions on Dielectrics and Electrical Insulation

Issue 5 • Oct 1995

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Displaying Results 1 - 21 of 21
  • Simulation of electrical discharges in gases. Nonuniform electric fields

    Publication Year: 1995, Page(s):1016 - 1041
    Cited by:  Papers (11)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2016 KB)

    Non-equilibrium behavior of electrons and ions in gases in an electric field occurs in many situations such as in the cathode fall region of a glow discharge, asymmetrical electrodes between which the Laplacian electric field is nonuniform, in coronas and spark breakdown. This paper reviews various methods used to describe the non-equilibrium behavior of electrons and the degree of success obtaine... View full abstract»

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  • Simulation of electrical discharges in gases. Uniform electric fields

    Publication Year: 1995, Page(s):1004 - 1015
    Cited by:  Papers (18)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (872 KB)

    This paper reviews various methods used to simulate avalanche growth due to electron multiplication in gases in uniform electric fields. The Monte Carlo simulation method and the Boltzmann equation methods are considered and data in sulfur hexafluoride are summarized in view of its use in engineering applications View full abstract»

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  • SF6/N2 mixtures: basic and HV insulation properties

    Publication Year: 1995, Page(s):952 - 1003
    Cited by:  Papers (172)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (3968 KB)

    The widespread use of SF6 by the electric power and other industries has led to increased concentrations of SF6 in the atmosphere. This causes concern as to possible effects on global warming, because SF6 is a potent greenhouse gas. This paper first touches on this issue and then documents the behavior of high pressure gases such as N2 and SF6... View full abstract»

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  • Digital analysis of partial discharges

    Publication Year: 1995, Page(s):822 - 837
    Cited by:  Papers (101)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1188 KB)

    In this paper relevant aspects of digital processing of partial discharge (PD) as measured by conventional PD detection methods are discussed. Moreover, a systematic study of PD quantities is presented and discussed within the scope of practical PD analyzers, including recognition of defects in certain HV insulation configurations View full abstract»

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  • The scientific career of Frederik Hendrik Kreuger

    Publication Year: 1995, Page(s):711 - 716
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (492 KB)

    This article reviews the career of the recently retired Dutch engineer Frederick Hendrik Kreuger and his work in the field of high voltage research View full abstract»

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  • Breakdown behavior of SF6 gas-insulated systems at low temperature

    Publication Year: 1995, Page(s):925 - 951
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2224 KB)

    The controversy surrounding low-temperature SF6 breakdown is addressed in detail. Earlier relevant studies are reviewed, some of the existing data is analyzed in a new light, and further theoretical considerations are presented. These discussions served to outline an experimental approach aimed at confirming or invalidating breakdown invariance at subnormal temperatures. Low-temperature... View full abstract»

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  • Measurement and simulation of PD in epoxy voids

    Publication Year: 1995, Page(s):729 - 743
    Cited by:  Papers (167)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1080 KB)

    Experimental data are presented of the development of PD activity in artificial air-filled spherical voids in epoxy resin over a period of ~6 months. The data are presented in the form of phase averaged plots of the charge distribution over the time (aging plots) and phase resolved histograms (PRPD patterns) at various aging states. They are interpreted by comparison to numerical simulations which... View full abstract»

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  • Automated recognition of partial discharges

    Publication Year: 1995, Page(s):796 - 821
    Cited by:  Papers (133)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (2116 KB)

    An overview of automated recognition of partial discharges (PD) is given. The selection of PD patterns, extraction of relevant information for PD recognition and the structure of a data base for PD recognition are discussed. Mathematical methods useful for the design of the data base are examined. Classification methods are interpreted from a geometrical point of view. Some problems encountered in... View full abstract»

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  • The transport and trapping of electrons in polymers

    Publication Year: 1995, Page(s):915 - 924
    Cited by:  Papers (54)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (772 KB)

    The conductivity of a polymer is determined by the availability of charge carriers and their mobility, and both terms are dominated by the trapping states in the polymer. The distribution in energy of these states may be studied by populating the states and observing the current that results from the relaxation of the trapped charges. In our experiments the states are populated by a pulse of elect... View full abstract»

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  • Ionization and excitation behavior in a microcavity

    Publication Year: 1995, Page(s):724 - 728
    Cited by:  Papers (33)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (408 KB)

    The excitation and ionization behavior of a 5 μm cavity, subjected to an electric field of 270 kV/cm, has been examined. Data on the production of electrons, ions, dissociated molecules and excited species is presented and the associated charge transfer characteristics are considered. The implications of the ionization and excitation processes, as concerns their effect upon the degradation rate... View full abstract»

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  • Evidence and presumption in PD diagnostics

    Publication Year: 1995, Page(s):780 - 795
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1384 KB)

    A general outline of the development of PD diagnostics is given with emphasis on problems of the validity of underlying models and the interpretation of results, because PD diagnostics is hardly ever direct and instead rests on a chain of inferences. Some major classical approaches are reviewed in this context, with a discussion of certain problems that also are significant for modern approaches. ... View full abstract»

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  • Recent results in HV measurement techniques

    Publication Year: 1995, Page(s):906 - 914
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    There has long been an intensive activity in the area of measurement technology for HV applications, both for testing, diagnostics and monitoring of HV devices and for investigation of material properties. This paper briefly surveys some methods developed and used: partial discharge (PD) detection in cable terminations using acoustics together with inductive techniques, inductive and capacitive on... View full abstract»

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  • Development of computer-based measurements and their application to PD pattern analysis

    Publication Year: 1995, Page(s):838 - 856
    Cited by:  Papers (73)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1444 KB)

    After referring briefly to the earlier developments of computer-based PD measurements in the 1970s, the paper outlines how the introduction of new technology has resulted in the design and production of a number of digital systems for use in test laboratories and on site. In order to avoid overgeneralization, the basis of the hardware required for detection and recording of the PD pulses is descri... View full abstract»

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  • Electrical conduction in HVDC mass-impregnated paper cable

    Publication Year: 1995, Page(s):718 - 723
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    HVDC cables play an important role in a growing number of HVDC links. For almost all of these cables, mass impregnated paper is used as electrical insulation. The electrical conductivity of this insulation is given by a commonly used empirical formula. This formula takes into account the temperature and stress dependency of the conductivity. This paper derives a physics-based equation describing i... View full abstract»

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  • Assessment of dielectric degradation by ultrawide-band PD detection

    Publication Year: 1995, Page(s):744 - 760
    Cited by:  Papers (64)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1372 KB)

    Partial discharges (PD) and the way they affect insulation quality has for decades been a rewarding subject for many researchers. There are two topics that are of particular interest to the workers in the field of PD. One is the impact of a wide variety of statistical tools on the interpretation of discharge data obtained with standard PD detection apparatus according to IEC270. The other topic is... View full abstract»

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  • Auto-correlation function of PD pulses under electrical treeing degradation

    Publication Year: 1995, Page(s):857 - 865
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (636 KB)

    Pulse correlation in PD signals was analyzed with auto-correlation function of PD pulses occurring in tree channels at 50 Hz ac voltage application as well as PD pulses occurring in several simple model electrodes. It was clarified that the auto-correlation function of PD pulse trains was strongly affected by void shape including tree length. It was found that even simple model electrodes, which s... View full abstract»

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  • Interpretation of partial discharges at dc voltages

    Publication Year: 1995, Page(s):761 - 770
    Cited by:  Papers (41)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (696 KB)

    The aim of this paper is to give an overview on partial discharges at dc voltage. A model is presented which describes the stochastic discharge process. The model is experimentally verified for internal discharges and for corona in air. In addition, the classification of discharge patterns is discussed. The 3-dimensional histogram describing the number of discharges depending on the discharge magn... View full abstract»

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  • Transient current measurement for the detection of water tree growth in polymeric power cables

    Publication Year: 1995, Page(s):866 - 874
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (672 KB)

    In this paper, the relationship between the frequency and time domain windows is discussed. From this study an appropriate time window for transient current measurements may be chosen so that reliable low frequency dielectric data can be obtained. The suitability of applying either Fourier transform or the Hamon approximation for the derivation of low frequency responses is discussed for transient... View full abstract»

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  • Enhancing the significance of PD measurements

    Publication Year: 1995, Page(s):876 - 888
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1060 KB)

    Specifications for PD tests on cables and equipment have been harmonized gradually during the past thirty years. However, there are still marked differences in the requirements for overvoltage conditioning, prior to PD tests, also in the voltages at which PD measurements are made. The merits of various specifications are discussed in relation to the conditions which cause PD and determine their ma... View full abstract»

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  • The use of fractal features for recognition of 3-D discharge patterns

    Publication Year: 1995, Page(s):889 - 892
    Cited by:  Papers (52)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This work presents further results on the use of fractal features for recognition of 3-D partial discharge patterns. Two fractal features, the fractal dimension and lacunarity were calculated from 3-D discharge patterns and their power to discriminate among various discharge patterns was analyzed. The results indicate that fractal features possess fairly reasonable discriminating abilities View full abstract»

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  • Partial discharge diagnostics for gas insulated substations

    Publication Year: 1995, Page(s):893 - 905
    Cited by:  Papers (116)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1116 KB)

    A defect such as a free metallic particle or stress-raising edge on an electrode could lead to breakdown in a gas insulated substation (GIS), but may be detected by the partial discharges it generates. Of the various detection means available, most success has been achieved with either acoustic transducers to detect sound waves from the discharge, or electrical couplers to pick up the ultra-high-f... View full abstract»

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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