2011 Electrical Insulation Conference (EIC).最新文献_第5页

Electric field computation of water droplets on a model insulator 模型绝缘子上水滴的电场计算

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996182

B. Sarang, P. Basappa, V. Lakdawala, G. Shivaraj

引用次数: 8

Performance simulation of polymeric insulators in polluted environments 污染环境下聚合物绝缘子性能模拟

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996165

J. Bezerra, V. R. A. Emerenciano, L. H. Nery

引用次数: 2

Testing of nano-insulation materials: Some ideas, some experiences 纳米绝缘材料的测试:一些想法，一些经验

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996209

Mario Brockschmidt, F. Pohlmann, S. Kempen, P. Groppel

{"title":"Testing of nano-insulation materials: Some ideas, some experiences","authors":"Mario Brockschmidt, F. Pohlmann, S. Kempen, P. Groppel","doi":"10.1109/EIC.2011.5996209","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996209","url":null,"abstract":"Today it seems to be beneficial to investigate how nanoparticles can serve to improve the electrical properties of insulation materials and how this affects their behavior during processing and other physical or chemical characteristics. However; a crucial factor is the choice of the filling material in combination with the carrying matrix as well as the filling technology. Hence it is useful to develop a testing arrangement that allows one to perform a significant number of tests on different materials and enables a high voltage laboratory to investigate the strength under electrical stress levels that generate partial discharges. Therefore; a testing device in accordance to IEC 60343 has been modified to use a very common and easy-to-produce plate shape for specimens and to increase throughput. Also this device allows to detect gases or to change the electrical field geometry. This paper reports on experiences with different contents of nano sized silica particles in epoxy resin matrices. This is the basis for the development of new insulation systems to be used for a more effective design of high voltage devices like rotating machines.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125836358","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: 9

Impact of rotor bar bridges in torque development in integral horsepower machines in PWM inverter environments 在PWM逆变器环境下，转子棒桥对整体马力电机转矩发展的影响

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996110

H. Penrose, Zachary Zych

引用次数: 1

Application of dry-air insulating media in 170kV GIS 干式空气绝缘介质在170kV GIS中的应用

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996131

G. Madarász, B. Choi, Joohwan Lee

引用次数: 4

Accelerated life testing of high voltage stator coils with enhanced PET-mica insulation system 增强pet -云母绝缘系统的高压定子线圈加速寿命试验

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996202

S. Haq, R. Omranipour

引用次数: 10

On-load tap changer's dynamic resistance measurement: Settings and interpretation 有载分接开关的动态电阻测量:设置和解释

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996115

J. Erbrink, J. Aditya, L. Chmura, J. Smit, R. Leich, B. Quak

{"title":"On-load tap changer's dynamic resistance measurement: Settings and interpretation","authors":"J. Erbrink, J. Aditya, L. Chmura, J. Smit, R. Leich, B. Quak","doi":"10.1109/EIC.2011.5996115","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996115","url":null,"abstract":"An on-load tap changer (OLTC) is prone to many different defects and degradation mechanisms due to its continuous operation under load condition. A high load current and high operation temperature accelerate the process of contact wear. Contacts erode due to the fact that under certain conditions the contacts develop a resistive layer due to hot insulation oil. As a major cause of OLTC failure, these defects might take place after some years of operation and their frequency increases with the operation time. Regular maintenance is applied due to degradation of the insulation oil. Dynamic resistance measurement (DRM) can be conducted during this maintenance to measure the resistance of the OLTC when it operates. The measurement results provide important information for assessing the actual condition of the OLTC. This paper aims to analyze the effect of test parameters on DRM results from service-aged OLTCs and describes the implementation of DRM in OLTC condition assessment. Two test parameters were selected for observation: the test current amplitude and the circuit resistance. Their amplitude was varied during laboratory experiments as well as on-site after regular maintenance. To quantify the various measurement results, an analytical tool using 4 performance parameters has been developed. Finally for interpretation, with the help of a three dimensional classification system which is presented in this paper, the actual condition of OLTCs can be identified during maintenance activities.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129308098","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

Failure modes of porcelain and toughened glass suspension insulators 瓷和钢化玻璃悬浮绝缘子的失效模式

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996150

R. Gorur

引用次数: 9

Space charge behavior of magnesium oxide filled epoxy nanocomposites at different temperatures and electric field strengths 氧化镁填充环氧纳米复合材料在不同温度和电场强度下的空间电荷行为

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996133

T. Andritsch, R. Kochetov, B. Lennon, P. Morshuis, J. Smit

{"title":"Space charge behavior of magnesium oxide filled epoxy nanocomposites at different temperatures and electric field strengths","authors":"T. Andritsch, R. Kochetov, B. Lennon, P. Morshuis, J. Smit","doi":"10.1109/EIC.2011.5996133","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996133","url":null,"abstract":"Space charge accumulation is a phenomenon, which is typical for high voltage dc insulation. It is of special importance for polymers, since they do not possess self-healing properties. Thus, the accumulation of space charges, which is linked to ageing, proved to be a limiting factor for HVDC applications. The focus of this paper is the behavior of epoxy based nanocomposites with magnesium oxide filler material. Nanoscale magnesium oxide has already been shown to decrease the space charge density for high field strengths. Additionally, MgO-nanocomposites showed an increase in the short term dc breakdown strength for low filler concentrations. Base material for all samples is commercially available bisphenol-A epoxy resin. Transmission electron microscopy was performed to validate the particle size and dispersion and showed that MgO has an average particle size of 22 nm. Space Charge profiles were obtained with the PEA-method and compared to neat epoxy. The profiles were taken under dc field strengths between 10 and 18 kV/mm. To see the influence of temperature on the charge distribution, the measurement was performed both at room temperature and at 60°C. The field enhancement factor of both the neat epoxy and the nanocomposite for different field strengths and temperatures has been calculated. It turned out that MgO nanocomposites show overall better space charge behavior at higher field strengths and at higher temperatures, compared to the unfilled epoxy. Both the space charge accumulation and the field enhancement factor are reduced, when going to higher electric field strengths or temperatures. Possible explanations for the observed space charge behavior are given.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122619192","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: 29

Investigation on insulation reliability of 380 kV XLPE cable systems 380kv交联聚乙烯电缆系统绝缘可靠性研究

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996193

X. Chen, J. Smit, S. Meijer

引用次数: 4