IEEE International Conference on Dielectrics (ICD)
2018 IEEE 2nd International Conference on Dielectrics (ICD)
1-5 July 2018
Showing 1-25 of 244
Proceedings
The proceedings of this conference will be available for purchase through Curran Associates.
Dielectrics (ICD), 2018 IEEE 2nd International Conference on
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Creepage Discharge Investigations with Ester-based Dielectric Liquids Under Switching Impulse
Publication Year: 2018,Page(s):1 - 3
The use of ester-based dielectric liquids is growing rapidly and more projects are now being specified with transmission voltage level transformers containing these liquids. It has been acknowledged through previous works that there are some differences in electrical behavior between ester-based liquids and mineral oil, which has traditionally been used for transformers. To optimize designs for es...Show More
Investigation of the partial discharge inception voltage of semiconductor sensor packages at repetitive impulse stress under the variation of pulse steepness and temperature
Publication Year: 2018,Page(s):1 - 4
In this paper a test and measuring system for partial discharge under impulse stress is described. Therefore a low noise impulse source with variable frequency and impulse steepness was designed. The base is a push-pull switch. The measurement was executed according to standard IEC 61934. For the present study, the measuring of the PD signals was performed with high-frequency current transformers ...Show More
Knowledge and experimental determination of ac-curate volume resistivity and conductivity is of high importance. Concentrating on measurement arrangements utilizing high voltage supplies, in most cases additional protection units are implemented in order to protect measurement equipment in case of test specimen failure. For this purpose, realization concepts of protection circuits are presented an...Show More
DC Voltage Endurance of Capacitor BOPP Films at High Temperature
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (5)
A large-area method for determining the voltage endurance of capacitor films is presented. The method was used to characterize the high field - high temperature performance of a commercial biaxially oriented polypropylene film. Following IEC standard 61251, an inverse power law model was fitted to the Weibull-distributed times-to-breakdown data. The insulation life increased rapidly as either fiel...Show More
Limitation of test sample arrangements according to IEC 60243-1: Electrical strength of insulating materials - Test methods
Sebastian Wels;Jens Obst;Albert Claudi;Bianca Böttge;Rico Bernhardt;Sandy Klengel
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (1)
This Publication deals with the dielectric breakdown performance of thermoplastic materials and the problems which occur if the corresponding standard IEC 60243-1 is applied. The first three chapters are describing the specimen according to the standard, the test materials and the methods that were used. The first part of chapter IV shows, based on an investigation, the problems of the used specim...Show More
Study of the Influence of Surface Resistivity while Measuring Space Charge in HVDC Cable with LIPP Method
Zhiyu Cao;Yewen Zhang;Cong Guo;Feihu Zheng;Zhenlian An;Zhien Zhu;Liming Yang;Stéphane Holé;Enke Yu;Xinlong zheng
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (3)
Because of the limitation of technical level and experimental conditions, the measurement of the space charge distributions in the full-size HVDC cables is still a challenge. In this paper, the influence of the surface resistivity of the shielding layer while measuring space charge with LIPP method was studied. To find out the influence, three kinds of samples were used for measuring the space cha...Show More
Feasibility of FDA method for the detection and classification of faults in extruded HVDC cables
Younes Norouzi;Christian Frohne;Volker Gauler;Peter Werle;Sahand Seifi
Publication Year: 2018,Page(s):1 - 6
Cited by: Papers (2)
A methodology for localizing failures in cable systems is required to increase their availability. To localize faults, the possible fault scenarios for HVDC cables must first be thoroughly researched, identified and classified. In this article, measurements for some possible faults in cable systems using different setups are presented and discussed to determine the potential of frequency domain an...Show More
Statistical correlation between partial discharge pulses magnitudes measured in the HF and UHF range
J. M. Martínez-Tarifa;G. Robles;J. M. Fresno;J. A. Ardila-Rey
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (1)
Partial discharge (PD) detection using antennas has become a useful technique for condition monitoring of high-voltage equipment. However, one of its main drawbacks is the lack of knowledge for the quantification of the PD magnitudes, which is possible when conventional capacitive dividers or high-frequency current transformers (HFCT) are used. This paper studies a possible relation between PD pul...Show More
Feedback of the amorphous phase on the ferroelectric phase: Imprint effects in P(VDF-TrFE)
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (1)
A concept to understand the mechanism of imprint in P(VDF-TrFE) is presented. We assume dielectric and ferroelectric dipoles to coexist and to be located in amorphous and crystalline regions respectively. Due to reorientation processes of the dielectric dipoles over several decades in time an electric field contribution arises at the location of ferroelectric dipoles causing the observed effects o...Show More
Ageing Indicators of Stator Winding Insulation subjected to Elevated Frequency Voltage & Thermal Stresses
Publication Year: 2018,Page(s):1 - 4
Laboratory studies were carried out to identify ageing indicators of stator winding insulation during ageing under elevated frequency, voltage and thermal stresses. A group of six generator bars was subjected to either electrical, thermal and combined electrical-thermal stresses. Electric stresses of 5kV/mm, 915 Hz and 6 kV/mm, 915 Hz and thermal stresses 170°C, 180°C and 200°C were chosen for the...Show More
Temperature dependent space charge and charge decay characteristics at silicone rubber / silicone grease interfaces
Publication Year: 2018,Page(s):1 - 4
Space charge buildup at interfaces pose great challenges when designing cable accessories. With space charges at interfaces, the electrical field can be locally enhanced and lead to failure. In order to get better information about the space charge buildup at silicone grease/silicone elastomer interfaces, the LIPP-method has been used in order to evaluate charge decay in dependence of temperature....Show More
Positive streamer simulation in nanodielectric fluids with Comsol Multiphysics
Ricardo Frascella;Juan Velasco;Ricardo Albarracín;Víctor Antonio Primo
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (3)
In recent decades, it is being studied the effect of adding nanoparticles (NP) to liquid dielectrics such as mineral oil used in power transformers. This mixture is commonly named as nanodielectic fluid (NDF). The results show that the addition of NP to mineral oil can allows to improve the thermal and dielectric performance of the base fluid. These effects are attributed to the fact that the NP a...Show More
Simulation of Partial Discharge under Impulse Voltage Waveforms
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (2)
A drift diffusion model is used to investigate a PD between spherical electrodes coated by a dielectric material. The model geometry is an axisymmetric analog of crossed wire experiments which have been used in the literature to investigate PD activity due to impulse voltage waveforms. The simulation shows that discharges in crossed wire arrangements are likely to form surface ionising waves over ...Show More
Effect of nanoparticle type on prebreakdown and breakdown characteristics of transformer oil
Cheng Chen;Mingkang Niu;Lei Wang;Yang Ge;Meng Huang;Yuzhen Lv;Chengrong Li
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (6)
In order to reveal the effects of nanoparticle type on breakdown and prebreakdown characteristics, this paper presents an experimental study on the effects of conductive Fe3O4 nanoparticles, semi-conductive TiO2 nanoparticles and insulating Al2O3 nanoparticles on the breakdown strength and prebreakdown streamer propagation in transformer oil under positive lightning impulse voltage. Nanoparticle w...Show More
Application of Online Partial Discharge Detection of Swithchgear Based on Ultra-High Frequency (UHF) Method
Yongning Wang;Guangzhen Liu;Xiaoguang Ma;Chi Zhang;Jin He;Xuan Xu;Bingliang Shan;Meng Huang
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (1)
Ultra-High Frequency (UHF) method is one of the most effective methods, which is widely applied for partial discharge (PD) detection of HV switchgear owning to its high sensitivity and strong resistance to external interference. Despite of these advantages, it is still uneasy to realize the accurate identification of the fault types of HV switchgear because of the lack of a systematic research and...Show More
Far-infrared Spectroscopic Identification of Seven Kinds of Antioxidants in Polymeric Insulation
Publication Year: 2018,Page(s):1 - 4
We added each of seven different kinds of anti- oxidants to a low-density polyethylene sheet and measured their Fourier-transform mid-infrared (FT-MIR) and FT-far-infrared (FT-FIR) absorption spectra. As a result, it has become clear that each antioxidant in general gives a clear specific FT-FIR spectrum even when the FT-MIR spectrum of the corresponding antioxidant is very similar to the spectra ...Show More
Several Experimental Results Indicating Filler/Polymer Interactions in Polymer Nanocomposites
Yoshimichi Ohki;Ryosuke Yanashima;Chisato Azeyanagi;Naoshi Hirai
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (2)
As a reason for superior insulation performance of polymer nanocomposites, interactions at the filler/polymer interfaces are widely believed. However, their evidence has been scarcely reported. In this paper, several experimental results obtained by the authors, which provide evidence of direct influences of the addition of fillers on the properties inherent to host polymers, are presented.Show More
Study on Pyrolysis Model of Mineral Insulating Oil and Temperature Field Simulation under Thermal Fault
Publication Year: 2018,Page(s):1 - 4
To reduce the incidence of thermal fault in oil filled equipment, this paper developed a thermal fault simulator device of oil filled equipment, such as transformer. The simulator is mainly consist of heating element-fault source, airtight enclosure, temperature control module, temperature measurement module, gas measurement module, and power measuring module. It can ensure the precision of temper...Show More
Effect of Different Particles on Breakdown and Conductivity Properties of Mineral Oil under Non-uniform DC Electric Field
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (6)
Mineral oil is widely used in transformers, whose security decides the safety and even lifetime of transformers. With the increase of the volume of high-voltage and largecapacity transformer, the quality of particle pollution source increases, which makes the influence of particle pollution on insulation performance more significant. This paper mainly focused on the breakdown and conductivity prop...Show More
Physicochemical and Electrical Properties of the Insulation Pressboard Modified by Sputtering Al2O3 Nano-Structure Layer on Its Surface
Publication Year: 2018,Page(s):1 - 3
Space charge accumulation is a major problem in the development of insulating materials. The aim of this work is to suppress charge injection from electrode into cellulose insulating pressboard under DC field by Al2O3 nano-structure layer. The Al2O3 nano-structure layer was deposited by radio frequency (RF) magnetron sputtering under room temperature. Physicochemical and electrical properties of t...Show More
Characterization of LDPE-Metal Oxide Nanocomposites Using Thermo-Analytical and Spectroscopic Techniques
Publication Year: 2018,Page(s):1 - 4
Polyethylene metal oxide nanocomposites find their application as high voltage insulation for direct current cables, to mitigate the space charge and other issues. Nano particles like SiO2, MgO, ZnO etc are used as filler materials in polyethylene matrix to achieve good electrical and mechanical properties like: space charge reduction, enhanced surface & volume resistivity and higher dielectric st...Show More
Evaluation of Electrical Characteristics on HVDC Cable According to Electric Field Dependency
Publication Year: 2018,Page(s):1 - 5
The electrical conductivity of an insulation material is a dominant factor that determines a dc electric field distribution, and it depends on temperature and electric field intensity. It is generally known that the electrical conductivity of an insulation material is more influenced by temperature than the electric field intensity. Thus, the electric field analysis method of the dc cable excludin...Show More
Effects of Surface Charge on Partial Discharge Characteristics in a Cavity at Very Low Frequency Excitation
Publication Year: 2018,Page(s):1 - 4
Cited by: Papers (1)
Partial discharge simulation is an alternative approach to investigate physical discharge phenomena in a dielectric material. In this paper, measured experimental results of partial discharge events are used to fit simulated discharge data developed in a finite element method based software at very low frequency and power frequency. Simulation results show that, at very low frequency, charge decay...Show More
Effect of Field-dependent Conductivity on Surface Charge Decay in ZnO/Silicone Rubber Composites
Zhonglei Li;Zhuoran Yang;Boxue Du;Mi Xiao;Jingang Su;Wenbo Zhu;Lewei Zhu;Xiaoxiao Kong
Publication Year: 2018,Page(s):1 - 4
Insulators in the HV power equipment are threatened by the surface charge accumulation, which can distort the local electric field, make an early insulation aging and even lead to a surface flashover accident in the worst case. This study tries to modify the dynamic behaviors of the surface charge accumulation and decay by introducing a nonlinear conductivity into the insulating material. The rela...Show More
The influence of crystallinity on polarization of the polyimide films
Publication Year: 2018,Page(s):1 - 4
In this work we studied influence of crystallinity on relaxation processes in thermoplastic polyimides based on 1,3-bis(3',4-dicarboxyphenoxy)benzene (dianhydride R) and diamine 4,4'-bis-(4"-aminophenoxy)biphenyl (BAPB diamine) by the methods of termoactivation spectroscopy (TSDC) and dynamic mechanical analysis (DMA). The dipole-group relaxation (β), space charge relaxation (β') and dipole-segmen...Show More
Proceedings
The proceedings of this conference will be available for purchase through Curran Associates.
Dielectrics (ICD), 2018 IEEE 2nd International Conference on
- Print on DemandPurchase at Partner
- External Hard-drivePurchase at Partner
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