IEEE Transactions on Dielectrics and Electrical Insulation (IEEE T DIELECT EL IN)

Publisher: Institute of Electrical and Electronics Engineers; IEEE Dielectrics and Electrical Insulation Society, Institute of Electrical and Electronics Engineers

Journal description

Electrical insulation common to the design and construction of components and equipment for use in electrical and electronic circuits and distribution systems at all frequencies.

Current impact factor: 1.23

Impact Factor Rankings

2015 Impact Factor Available summer 2015
2013 / 2014 Impact Factor 1.228
2012 Impact Factor 1.36
2011 Impact Factor 1.094
2010 Impact Factor 1.47
2009 Impact Factor 0.848
2008 Impact Factor 1.037
2007 Impact Factor 0.792
2006 Impact Factor 0.771
2005 Impact Factor 1.124
2004 Impact Factor 0.872
2003 Impact Factor 0.584
2002 Impact Factor 0.86
2001 Impact Factor 0.778
2000 Impact Factor 0.643
1999 Impact Factor 0.5
1998 Impact Factor 0.645
1997 Impact Factor 0.8
1996 Impact Factor 0.348
1995 Impact Factor 0.431

Impact factor over time

Impact factor
Year

Additional details

5-year impact 1.42
Cited half-life 7.00
Immediacy index 0.13
Eigenfactor 0.01
Article influence 0.27
Website IEEE Transactions on Dielectrics and Electrical Insulation website
Other titles IEEE transactions on dielectrics and electrical insulation
ISSN 1070-9878
OCLC 28524935
Material type Periodical, Internet resource
Document type Journal / Magazine / Newspaper, Internet Resource

Publisher details

Institute of Electrical and Electronics Engineers

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  • Classification
    ​ green

Publications in this journal

  • IEEE Transactions on Dielectrics and Electrical Insulation 04/2015; 22(2):1176-1185.
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    ABSTRACT: Partial discharge (PD) measurement provides a means for online monitoring and diagnosis of transformers. However, extensive interferences and noise can significantly jeopardize the measured PD signals and cause ambiguity in PD measurement interpretation. Necessary PD signal de-noising techniques need to be adopted and wavelet transform is one of such techniques. Mother wavelet selection, decomposition level determination and thresholding are important processes for effective PD extraction using wavelet transform. Various methods have been proposed in the literature to improve the above processes of wavelet transform. In these methods a single threshold is normally adopted at each decomposition level and a binary decision is made to indicate whether an extracted signal is PD signal or noise. However, in online PD measurements it is difficult to find a threshold, which can be used for extracting only PD signals without including any noise. As such, the signals determined by a single threshold cannot be assured as PD signals with certainty. To address the limitations caused by the single thresholding method in wavelet transform for PD signals extraction, this paper proposes quantile based multi-scale thresholding method at each decomposition level, which can thus provide probability indexes for the extracted signals evaluating the likelihood of these signals to be PD signals. To evaluate the proposed method, PD measurements have been conducted on both experimental PD models and in-service transformers at substation. The results are provided in the paper.
    IEEE Transactions on Dielectrics and Electrical Insulation 04/2015; 22(2):1105-1117.
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    ABSTRACT: We construct mathematical models to represent the relationship between the thermal stress and the deterioration rate for electrical insulation. The Arrhenius-log-normal model has been used generally for such a deterioration model due to the thermal stress. The Arrhenius law is based on the chemical reaction theory between the absolute temperature and the activity of materials. On the other hand, as for the log-normal distribution, we have been only followed the traditional statistical treatment such that the deterioration could be represented by the normal distribution when logarithmic time is used. The Arrhenius-log-normal model is a combination of these two models. However, in the International Electrotechnical Commission 60216-1, deterioration due to the thermal stress is represented by the mechanical strength, and the time showing 50% mechanical strength to the initial strength is defined as the failure time. We assume here the generalized Pareto distribution model, the generalized logistic distribution model, or the normal distribution model for such a model. Thus, in this paper, we construct new mathematical models combined by the Arrhenius law with the generalized Pareto distribution model, the generalized logistic distribution model, or the normal distribution model.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):482-487. DOI:10.1109/TDEI.2014.004450
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    ABSTRACT: Based on the viewpoint that the properties of polymer could be changed by nano particles, epoxy/Al2O3 nanocomposites were prepared to study the effects of nano particles on tracking failure. Nano-Al2O3 particles were mixed into neat epoxy with filler content of 1, 3, 5 and 7 wt%. Tracking experiments were carried out by applying positive dc voltage. The effects of the filler content on tracking resistance were studied by recording the tracking phenomena and discharge currents during the tracking process. Obtained results showed that when the filler content increased from 0 to 5 wt%, the duration of the whole tracking process increased, the weight loss of nanocomposites and the area of tracking pattern decreased. The opposite tendency was observed when the content increased from 5 to 7 wt%. The discharge currents were studied using the recurrence plot technique to investigate the nonlinear characteristics of discharge currents and reflect the effects of nano particles on discharge. The fractal dimension method was used to study the structures of scintillation discharge distribution and tracking pattern to analyze the effects of nano particles on the occurrence of tracking pattern. The results showed that the nano-Al2O3 particles had very significant effects on the tracking resistance of epoxy. The best restriction effects were obtained with the filler content of 5 wt%.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):109-116. DOI:10.1109/TDEI.2014.004520
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    ABSTRACT: Transformers are the vital units of power system and the major dielectric used in transformer is petroleum based mineral oil, which acts both as an insulating medium and potential coolant. This work focuses on reclaiming aged mineral oil using activated bentonite and enhancing the critical characteristics of reclaimed mineral oil and fresh transformer oil using antioxidants. The reclamation is carried by treating 500 ml aged mineral oil with 5 g activated bentonite quantity. Then the treated sample is mixed with different combinations of natural and synthetic antioxidants. The enhancement of fresh transformer oil is carried by adding multiple combinations of antioxidants with different mechanisms like free radical scavenging, metal chelating and synergism. The critical parameters like breakdown voltage, viscosity, flash point and fire point of the samples are calculated using ASTM and IEC specifications before and after adding antioxidants. The recorded parameters prove that the reclaimed aged mineral oil after added with high performance antioxidant combinations can perform superior than base fluids and can be reused in power transformers. Moreover the enhanced fresh transformer oil with antioxidants shows greater improvement and this technique could be possibly employed for reclamation (regenerating) and enhancement of waste insulating oils.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):548-555. DOI:10.1109/TDEI.2014.004094
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    ABSTRACT: The presence of Corrosive sulphur in mineral transformer oil affects the performance of insulation system of transformers. In this paper results of experimental investigations carried out on voltage current characteristics and insulation resistance of paper oil insulation in presence of copper sulphide are presented and discussed. A model for copper sulphide migration is proposed to explain the increase in leakage current and reduction in insulation resistance. Existence of two regions in voltagecurrent characteristics, one dependent on the insulation properties of paper oil insulation and other due to semi-conducting copper sulphide is discussed and explained.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):571-580. DOI:10.1109/TDEI.2014.004408
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    ABSTRACT: This paper deals with the parameters influencing the dynamics of water droplets immersed in dielectric liquids when submitted to a uniform electric field stress. We mainly investigate the influence of the sizes and number of water droplets as well as their position with respect to the electrodes and to each other on their deformation (shape - elongation), their break-up and/or breakdown of oil gap. The experimental observations are discussed using electrohydrodynamic approach. It is shown that the deformation can be symmetric or asymmetric depending on the geometrical parameters (electrodes gap, the positions, sizes and number of water droplets within this gap), the applied electric field and its application time as well as the surface charge density. The conditions required to bridge oil gap and then breakdown are also analysed. It is also shown that even if the sizes of water droplets are insufficient to bridge the gap when elongated, local vaporization and discharges can be initiated at their poles (ends) resulting in mixed bridge consisting of water and vapour phase (water vapour and/or liquid vapour) leading then to breakdown.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):359-365. DOI:10.1109/TDEI.2014.004754
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    ABSTRACT: This year the IEEE Transactions on Dielectrics and Electrical Insulation (TDEI) is celebrating its fiftieth anniversary. TDEI actually began in 1994 when 'Dielectrics' was added to the previous title of the same publication of IEEE Transactions on Electrical Insulation (TEI). The first issue of TEI was published in March 1965, fifty years ago, with a very modest beginning. That first issue, which can be accessed on IEEE Xplore, had only four papers constituting a total of 19 printed pages. TEI was international in outlook right from its beginning. The four papers in the first issue were submitted from Japan (one paper) and the USA (three papers). The second issue of TEI was published in November 1965 and had papers from the United Kingdom (two) and the USA (one). In its first year TEI had a total of seven papers totaling 48 pages. These papers covered a wide range of topics such as electrical failure of organic insulators, thermal behavior of enamel wires and other solid insulation, electrical breakdown of solids and gaseous insulation. Papers on these topics may still be seen in recent issues of TDEI.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):1-3. DOI:10.1109/TDEI.2014.005081
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    ABSTRACT: In this paper, a new role of titanium isopropoxide (TIPT) catalyst is revealed on rejuvenation of water tree aged cables, and TiO2 inorganic particles are found in the water tree voids after injecting a rejuvenation fluid. Through analyzing the products of TIPT hydrolysis, the nano-scale TiO2 particles are observed. This proves that the hydrolysis reaction of TIPT can generate the TiO2 particles. Furthermore, a water tree accelerated aging system with a needle electrode is used to obtain water tree in cross-linked polyethylene (XLPE) cable samples. The water tree aged samples are injected with a fluid including a siloxane and TIPT for rejuvenation, and the breakdown voltage of the injected samples is significantly higher than that of the water tree aged samples. By use of a scanning electron microscope (SEM) and energy disperse spectroscopy (EDS), some agglomerated TiO2 particles are found in the water tree areas of the injected samples. Also, the TiO2 particles are observed inside the breakdown channels of the injected samples. This indicates the TIPT can react with water in water tree and form the TiO2 gel to fill water tree voids. Because of the filling effect of inorganic TiO2 particles, the breakdown strength of the rejuvenated cables can be improved, which possibly suppresses the damage generated by the partial discharge inside the water tree.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):611-618. DOI:10.1109/TDEI.2014.004065
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    ABSTRACT: The non-exponential polarization and depolarization current density after a voltage step is investigated in the ion conducting polymer polyethylene oxide yielding a Kohlrausch or Curie-von Schweidler behavior in the long and in the short time range with different exponents respectively. To explain this behavior simulations with a three-dimensional hopping model are performed. Interactions between all charges in the system are considered. A distribution of sites is introduced to construct an amorphous structure. The intrinsic barrier heights between two neighboring sites in a multi-well energy structure depend here on the distance between the sites and the interaction between the charges yielding a distribution of relaxation times. Simulations with this model show a Kohlrausch behavior in the long time range as well as in the short time range. For short times the distribution of relaxation times is responsible for the Kohlrausch behavior. In the long time range a distribution of distances of the sites to the electrodes resulting in a distribution of image forces causes the Kohlrausch current.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):503-508. DOI:10.1109/TDEI.2014.004651
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    ABSTRACT: Partial discharge (PD) diagnostic is considered as the main concern while making condition assessment plan for medium voltage assets. PD detection and localization in multi-section (straight and branched power lines) MV network is difficult by using the conventional Time Domain Reflectometry and Time Difference of Arrival methods. It is due to interconnected cables of different lengths and properties which make the interpretation of PD signals quite complex as compared to single cable routes. This paper presents an online technique of PD localization in MV cable network. PD activity emits current pulses propagating away from the PD site. Polarity of the detected PD pulses with reference to polarity of the supply voltage determines the direction of arrival of these pulses. Comparison of the polarity of PD pulses identifies the faulty section of the overhead covered conductor line as well as the cable network. The effect of power factor variation in real network scenario has been analyzed for true polarity comparison. Evaluation of direction of arrival is based on directionally calibrated sensor. Allocated induction sensors are employed along the feeder for integrated implementation of proposed technique in accordance with the distributed agent for improving the network reliability.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):436-447.
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    ABSTRACT: The polarization and the depolarization current after application of a voltage step are investigated in the solid electrolyte polyethylene oxide. For low applied fields the current density follows a Kohlrausch behavior, i.e. j α fα, in the long time range during the polarization and the depolarization process respectively. By using sufficiently high applied fields charge injection sets in and the current during the polarization process is nearly constant at long times. It turns out that the transient depolarization current in this case shows a pronounced unforeseen maximum. The time to the maximum as well as the height of the current peak depend on the field applied before, the polarization time, the temperature, the LiClO4 doping, the electrode material, and the sample length. Simulations carried out using a discrete three-dimensional hopping model reveal qualitatively comparable results. It is concluded that the injection and later extraction of excess electrons according to Lindmayer's theorem is responsible for the appearance of the current maximum.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):509-515. DOI:10.1109/TDEI.2014.004667
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    ABSTRACT: Homogeneous and composite polymeric insulating systems under operation are subjected to various stresses, including thermal, causing degradation and deterioration to the material. Ageing increases charge accumulation within the volume of the material. In this paper, charge trapping and transport phenomena in thermally aged homogeneous epoxy resin and polyethylene are studied. Pulsed Electro-Acoustic (PEA) measurements are performed to obtain the spatial distribution of charge within the volume of a dielectric. Apart from the space charge behaviour at dielectric - electrode interfaces, the behaviour of interfacial charge at dielectric - dielectric interfaces is also investigated. To this end, composite dielectrics are created with epoxy and polyethylene as constituents. The effect of thermal ageing on the interfacial charge evolution and accumulation in dielectrics with interfaces is investigated. Due to thermal ageing of homogeneous materials, charge is seen to accumulate within the bulk of the material, and not only at the interfaces. In aged composites, interfacial charge evolves at the interfaces, as well as within the bulk of the material. However, space charge measurements in aged materials with interfaces require special care, as signals reflected from space charge sites within the volume of the aged dielectrics tend to distort the real signal.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):541-547. DOI:10.1109/TDEI.2014.004467
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    ABSTRACT: This paper is the second part of an investigation on the new enlargement law for HVDC cables developed by the authors. The previous Part 1 has illustrated the theoretical derivation of this law and its application to enlargements over cable length. The present Part 2 is dedicated to the enlargement over cable radius and to its noteworthy aspects, that are essentially associated with the complicated function HDC. These aspects are mainly relevant to the role played by cable conductor losses, or equivalently by conductor temperature. They are deeply investigated here via a series of three radial enlargements for HVDC extruded cables, that involve conductor cross-section and insulation thickness only: this enables focusing the attention on the HDC function, that includes the dependence of the enlargement law on the radial cable geometry.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):202-210. DOI:10.1109/TDEI.2014.004627
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    ABSTRACT: Anti- and de-icing techniques for the power systems have been attractive topics in recent years. Semiconductive silicone rubber coatings have been considered and applied in a few regions of China. This paper focuses on the problem of selecting semiconductive coatings under different ambient temperatures. In order to select the semiconductive coatings, the volume resistivity of the coatings doped with various carbon black concentrations was first tested. Then a series of icing/anti-icing tests on bottom-coated insulator strings were carried out in a climate room, where their antiicing performance was studied in terms of icing appearance, ice accretion weight, leakage current and surface temperature. The results show that when the ambient temperature is -2, -4 and -6 °C, the coating resistivities required to prevent ice accretion on the insulator strings tested are presented in this paper.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):400-408. DOI:10.1109/TDEI.2014.004470
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    ABSTRACT: The main objective of this paper is to present parametric studies and an improved hypothesis on the booster shed (BS) effects on the electrical performance of post station insulators in heavy icing conditions. It is fundamental to optimize the BS parameters (i.e. number, position, inclination angle, and diameter). Numerical simulations using the finite element method (FEM), implemented by Comsol Multiphysics<;sup>TM<;sup>, were carried out to calculate the influence of BS parameters and icing conditions on the potential distribution of the insulator. Simulation results of various BS configurations show that during the melting period, around 99% of the applied voltage is distributed along the air gaps. Moreover, based on the improved hypothesis, the major effect of BSs is the creation of air gaps and their minor effect is to increase the dry arcing distance. Also, among air gap length, dry arcing distance, and total ice-free leakage distance (IFLD<;sub>tot<;/sub>), IFLDtot is the best indicator to quantify the effect of BSs on standard post insulators.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; DOI:10.1109/TDEI.2014.004619
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    ABSTRACT: We systematically screen chemical compounds for their suitability as high voltage insulation gases on the basis of electrical, environmental and safety characteristics. Recently, 1234 compounds were identified out of a library of over 56000 chemicals by means of virtual screening. The authors applied filters for the global warming potential (GWP), toxicity, stability, flammability and critical temperature to find promising candidate refrigerant fluids. We estimate the electric strength (ES) and the boiling point of these environmentally friendly compounds to select promising SF6 replacement candidates. The most promising candidates within our method are predominantly Fluoro-alkenes, -alkylsulfides, -alcohols and-alkylamines. In addition, risk and safety data was compiled for compounds that are supplied by chemical vendors at this date, resulting in 7 preliminary candidates.
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):296-302. DOI:10.1109/TDEI.2014.004474
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    ABSTRACT: We are pleased to announce that the February 2016 issue of the IEEE Transactions on Dielectrics and Electrical Insulation (TDEI) will be a special issue on Vacuum Insulation, Fundamentals and Applications. This issue is open to all authors including presenters of papers at the 26th International Symposium on "Discharges and Electrical Insulation in Vacuum (ISDEIV 2014) held on 28 September ??? 3 October 2014 in Mumbai India who are especially encouraged to submit their work to this special issue. Topics include, but are not restricted to: A: Breakdown and Flashover 1. Vacuum breakdown and pre-breakdown phenomena 2. Surface discharges and flashover phenomena 3. RF breakdown and multipactoring phenomena 4. High field effects in microelectromechanical systems and nano-structures B: Vacuum arcs 1. Switching in vacuum and related phenomena 2. Interaction of vacuum arcs with magnetic field 3. Vacuum arc physics 4. Computer modeling and computer aided design 5. Pulse power physics and technology C: Applications 1. Vacuum interrupters and their applications 2. Deposition of coatings by vacuum arc plasmas and related technologies 3. Electron, ion, neutron, X-ray and other beam and light sources 4. Accelerators and fusion reactor related issues 5. Space related technologies 6. Vacuum arc melting and degassing
    IEEE Transactions on Dielectrics and Electrical Insulation 02/2015; 22(1):636-636. DOI:10.1109/TDEI.2014.005124