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

Investigation of the Breakdown Voltage of Insulation Oils at Medium Frequency after Thermal Ageing 绝缘油热老化中频击穿电压的研究

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341873

J. Vocke, R. Möller, R. Puffer, B. Soppe

引用次数: 2

Influence of Demetallization Processes on Capacitor Grade Polymer Films Breakdown Strength 脱金属工艺对电容器级聚合物薄膜击穿强度的影响

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341912

V. Belko, O. Emelyanov, I. Ivanov, N. Fedotov

引用次数: 1

New chemistry for impregnation of HV machines: influence of compatibility between resin and mica tapes 高压浸渍机的新化学:树脂与云母带相容性的影响

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341930

M. Ferraris, T. J. Murray, M. Viola

{"title":"New chemistry for impregnation of HV machines: influence of compatibility between resin and mica tapes","authors":"M. Ferraris, T. J. Murray, M. Viola","doi":"10.1109/ICD46958.2020.9341930","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341930","url":null,"abstract":"European regulation changes have pushed electric machine manufacturers to request new materials suitable for impregnation of High Voltage motors and generators that are also compliant with European health restrictions. Until now, the most widely used materials for coils insulation are a blend of epoxy resin and anhydride that impregnates mica tapes, containing an epoxy binder with a Zinc naphthenate catalyst, which has the advantage of stability in storage tanks and good thermal and electrical properties. The development of a new impregnating resin, made with a hybrid epoxy-polyester chemistry, highlighted the need to find a way to improve compatibility with mica tapes. This new resin / tape combination has been visually evaluated, as first step, and then tested on bars, observing how dissipation factor versus voltage change after thermal ageing at high temperatures. Test bars made with new resin/tape combination withstood thermal ageing for a longer time than reference materials, confirming that compatibility between impregnating resin and mica tapes is a crucial factor influencing thermal resistance of a coil main wall insulation system.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"35 1","pages":"685-688"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86438373","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: 1

Interface charge effect measurement in 2-μm-thick polypropylene sample under voltage with thermal method 用热法测量2 μm厚聚丙烯试样在电压作用下的界面电荷效应

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9342009

Céline Corbrion, S. Holé

引用次数: 0

Effect of sPP Content on Dielectric Relaxation and Trap Level Characteristics of PP blend insulation sPP含量对PP共混绝缘介电弛豫和陷阱能级特性的影响

2020 IEEE 3rd International Conference on Dielectrics (ICD) Pub Date : 2020-07-05 DOI: 10.1109/ICD46958.2020.9341925

M. Fan, Zhonglei Li, B. Du, S. Zhou

{"title":"Effect of sPP Content on Dielectric Relaxation and Trap Level Characteristics of PP blend insulation","authors":"M. Fan, Zhonglei Li, B. Du, S. Zhou","doi":"10.1109/ICD46958.2020.9341925","DOIUrl":"https://doi.org/10.1109/ICD46958.2020.9341925","url":null,"abstract":"Polypropylene (PP) is regarded as a recyclable alternative to XLPE for cable insulation on account of its higher heat resistance and higher electrical resistivity. The dielectric relaxation and trap level characteristics of isotactic PP (iPP), syndiotactic PP (sPP) as well as atactic PP (aPP) blends are investigated. The associations between polymer polarization response and traps level characteristics of PP blends are discussed. Frequency-domain dielectric spectroscopy (FDS) methods are used to analyze the polarization response of five PP blends at 50, 70 and 90 0C. Isothermal surface potential decay (ISPD) tests are performed to acquire the traps level distribution and the influences of traps level characteristics on the dielectric response are discussed. The polymer polarization behaviours a and $delta$ of five samples is closely related to segmental movements and carriers hopping behaviours, separately. The intensity of a relaxation strength ($Deltavarepsilon_{a}$) declines with the increase of sPP content, because the related coefficient (g) between PP molecular chains is reduced. The calculated energy $E_{tau}$ for $delta$ process is in proportion to the shallow traps level, because the shallow traps with a higher level increase the potential barriers of carriers hopping behaviors. The increase in temperature causes the dipole to undergo intense Brownian motion in the electric field, resulting in a decrease in $Deltavarepsilon_{a}$ with increasing temperature. The thermal motion of the charge increases the mobility of carriers in the PP and causes $Deltavarepsilon_{delta}$ to increasewith increasingtemperature.","PeriodicalId":6795,"journal":{"name":"2020 IEEE 3rd International Conference on Dielectrics (ICD)","volume":"43 1","pages":"431-434"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86911218","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