2020 IEEE 3rd International Conference on Dielectrics (ICD)最新文献_第5页

Electro-Optical Diagnostics of Single Partial Discharges 单次局部放电的光电诊断

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341957

S. Gortschakow, P. Pieterse, M. Hilbert, R. Kozakov, D. Uhrlandt, M. Kurrat

{"title":"Electro-Optical Diagnostics of Single Partial Discharges","authors":"S. Gortschakow, P. Pieterse, M. Hilbert, R. Kozakov, D. Uhrlandt, M. Kurrat","doi":"10.1109/ICD46958.2020.9341957","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341957","url":null,"abstract":"Light emission and electrical signals of partial discharge (PD) events in artificially introduced defects in insulating medium, namely polyethylene, polyvinyl chloride (PVC), silicone and polydimethylsiloxane (PDMS) have been examined. Internal discharges in a micro void and external discharges on insulator surface have been created using two specific experimental setups, which allow for observation of single discharges. The light pulses from single discharge events were registered by a photomultiplier. The discharge images have been acquired by an iCCD cameras with single and double stage amplification. Electrical signals have been measured using wideband probes. Two model arrangements have been developed and applied. Results of optical measurements are compared with conventional phase resolved partial discharge (PRPD) patterns. There exist different correlation modes between light intensity and value of partial discharge current, which can be ascribed to different type of PD origins. The comparison of optical and electrical signals shows a good correlation between both detection methods. Analysis of obtained discharge patterns in dependence on used material and electrode polarity is presented. It is shown that optical signals obtained from proper diagnostic devices carry similar information as conventional PRPD diagrams. The results of investigations can be used for development of new PD diagnostics.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"8 1","pages":"850-853"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83468206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Changes in Chemical Structure and Mechanical Properties Induced in Cross-linked Polyethylene by Thermal and Radiation Aging 热和辐射老化对交联聚乙烯化学结构和力学性能的影响

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341944

Yuya Miyazaki, N. Hirai, Y. Ohki

引用次数: 0

A comparative analysis of different dielectric fluids for cable sealing ends 电缆密封端用不同介质流体的比较分析

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341931

S. Thakur, G. Callender, T. Andritsch, P. Lewin, A. Shaw, O. Cwikowski

引用次数: 1

Simulations of Electric Field Dynamics for DC Partial Discharge Sequences 直流局部放电序列的电场动力学模拟

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341996

G. Callender, P. Seri, R. Ghosh

引用次数: 0

Radiation induced conduction and space charge dynamics in polyimide revealed by off-line and online PEA method 用离线和在线PEA方法研究聚酰亚胺的辐射诱导传导和空间电荷动力学

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9342019

Weiwang Wang, Zhiqiang Guo, H. Miyake, Y. Tanaka, Shengtao Li

{"title":"Radiation induced conduction and space charge dynamics in polyimide revealed by off-line and online PEA method","authors":"Weiwang Wang, Zhiqiang Guo, H. Miyake, Y. Tanaka, Shengtao Li","doi":"10.1109/ICD46958.2020.9342019","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342019","url":null,"abstract":"This paper aims at the measurement of the time dependence of the internal space charge and analysis of radiation induced conduction (RIC) in polyimide caused by electron beam irradiation. Both the normal PEA method and an “on-line” PEA system were employed to detect the space charge profiles after and during the electron irradiation. In view of that, a small size PEA device with a ring high voltage electrode was used for the “on-line” measurement. In addition, the electric conduction was discussed by the RIC theory. Negative charge accumulations were introduced by the irradiated electrons, which increase with the increase of electron energy and density. The behaviors of RIC depend on electron energy, indicating an enhancement with high electron energy. These phenomena are closely related to the charge deposition and electron-hole pairs. High energy and density of the electron beams introduced large amounts of negative charge accumulations. Meanwhile, they contributed to the high level of RIC. Consequently, the space charge would maintain the dynamic equilibrium in polyimide film.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"2 1","pages":"375-378"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90158394","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Charge Accumulation at High DC Voltage and Superimposed Medium Frequency AC Voltage 高直流电压和叠加中频交流电压下的电荷积累

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341963

F. Seifert, I. Porizka, C. Leu

引用次数: 3

Optimization of Filler Loading of Multi-Particle Mineral Oil Nanofluid for Transformer Insulation 变压器绝缘用多颗粒矿物油纳米流体填料填充优化研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341838

S. Sarov Mohan, P. Preetha

引用次数: 3

Investigating the Electronic Properties of a Composite Dielectric under an Applied Electric Field by Muon Spectroscopy 用介子光谱研究外加电场作用下复合介质的电子特性

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9342014

B.A. Orton, S. Cottrell, F. Pratt, S. Dodd, N. Chalashkanov

{"title":"Investigating the Electronic Properties of a Composite Dielectric under an Applied Electric Field by Muon Spectroscopy","authors":"B.A. Orton, S. Cottrell, F. Pratt, S. Dodd, N. Chalashkanov","doi":"10.1109/ICD46958.2020.9342014","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9342014","url":null,"abstract":"The development of a new technique using implanted 100% spin polarized positive muons to probe the behaviour of charge carriers within dielectrics is described. Muons are a well-established method for probing materials at the atomic level. They offer a local probe sensitive both to bound molecular charges and to free charge carriers in materials. A muon study to investigate the charge distribution within a composite dielectric - consisting of epoxy, mica and glass fibre components- as a function of the externally applied electric field strength (E-field) is reported. Implanted muons react with the host epoxy molecule, undergo chemical addition at specific locations and probe the local electronic structure. Muon spectra are interpreted through a comparison with the electronic structure calculated using Density Functional Theory.It is shown that the application of an external E-field modifies the form of the observed spectra. It is believed that the effect of an E-field on identified bound charges within the molecule is being observed, suggesting muons are an excellent probe for understanding local charge redistributions in polymeric dielectrics.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"64 1","pages":"562-565"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75549321","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modelling the electric field transients in DC insulation systems upon energization and voltage polarity inversion 直流绝缘系统在通电和电压极性反转时的电场瞬态建模

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341921

P. Seri, G. Montanari

{"title":"Modelling the electric field transients in DC insulation systems upon energization and voltage polarity inversion","authors":"P. Seri, G. Montanari","doi":"10.1109/ICD46958.2020.9341921","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341921","url":null,"abstract":"Designing insulation systems for DC application is not straightforward as under AC, both because electric field can distribute inside the insulation in significantly different ways, and due to the effect on field distribution of voltage transients, such as energizations and the polarity inversions. During and after each voltage variation, the electric field in the insulation is mainly driven by permittivity, as in AC, while at steady-state the electric field profile depends on conductivity and, hence, on dielectric material and load. This can impact on aging phenomena and rate, thus on the electro-thermal life of an insulation system. It is, therefore, important to estimate how long it takes for the electric field to reach its steady state condition (i.e. the transient time) upon voltage-time variations. Different methods for estimating the electric field transient time are discussed in this paper, from conductivity and permittivity measurements at high or low fields, as a function of temperature, to partial discharge time evolution. Specimens made by polymeric materials having different conductivities, and containing artificial defects, are used for the experimental validation of those methods.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"770 Pt A 1","pages":"485-488"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77050146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bilayer PI/BaTiO3-P(VDF-TrFE-CFE) composites with high discharge energy density 高放电能量密度双层PI/BaTiO3-P(VDF-TrFE-CFE)复合材料

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341867

B. Du, J. Xing, M. Xiao, Jin Li, R. Xu, Z. Ran, H. Liu, H.L. Sun

{"title":"Bilayer PI/BaTiO3-P(VDF-TrFE-CFE) composites with high discharge energy density","authors":"B. Du, J. Xing, M. Xiao, Jin Li, R. Xu, Z. Ran, H. Liu, H.L. Sun","doi":"10.1109/ICD46958.2020.9341867","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341867","url":null,"abstract":"Ferroelectric polymer P(VDF-TrFE-CFE) is widely employed as energy storage materials of dielectric capacitors, but the discharge energy density of P(VDF-TrFE-CFE) is limited by the lower breakdown strength, which restricts the further development. The paper proposes a solution by preparing P(VDF-TrFE-CFE) composites based on bilayer structure and nanoparticles. Polyimide (PI) with high breakdown strength is used as the bottom layer, and the BaTiO3/Ferroelectric polymer composites BT-P(VDF-TrFE-CFE) with high dielectric constant is used as the top layer, the bilayer composite films PI/BTP(VDF-TrFE-CFE) doped with different content of BaTiO3 (1 vol.%, 3 vol.%, 5 vol.%) were prepared via coating, heat treatment and quenching. The microstructure and energy storage performance of bilayer films were analyzed, the results show that the discharge energy density of composite film doping with 3 vol.% of BaTiO3 can be up to 9.8 J/cm3 at 440 kV/mm, which is higher than pure P(VDF-TrFE-CFE) film (7.2 J/cm3). The energy storage efficiency of composite film is 46% at 440 kV/mm, slightly lower than pure P(VDF-TrFE-CFE) film (49% at 337 kV/mm).","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"206 1","pages":"185-188"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77060536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2