2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第3页

DC inclined-plane testing of silicone rubber formulations 硅橡胶配方的直流斜面试验

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772788

G. Bruce, Simon M. Rowland, A. Krivda

{"title":"DC inclined-plane testing of silicone rubber formulations","authors":"G. Bruce, Simon M. Rowland, A. Krivda","doi":"10.1109/CEIDP.2008.4772788","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772788","url":null,"abstract":"The inclined plane test for tracking and erosion resistance of materials, IEC-60587, has become a routine tool for researchers developing high voltage outdoor insulation materials. The test is designed for ac applications and many laboratories have many years of experience with the technique. DC power systems are becoming more important and competitive in the market place. Often insulation systems designed for AC applications are utilised on dc systems. However, there is clear evidence of behavioural differences between identical materials under AC and DC stresses. An equivalent test to IEC-60587, has been developed and utilised for the dc case. A computer-based monitoring system is used to study materials beyond the criteria set by IEC 60587 and this system is reviewed in the paper. A number of different formulations of silicone rubber have been evaluated using the rig described. In this paper particular attention is given to the nature of electrical discharges under different test conditions and how this influences material degradation. Measurements show that the sample degradation mechanism is very different for positive and negative HVDC, while positive DC has shown to be the most aggressive for the materials tested.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"48 1","pages":"196-199"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76052186","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: 11

Local Field versus Meanfield Theory for Dielectric Spheres 介电球的局部场与平均场理论

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772771

Markus Kuehn, Herbert Kliem

引用次数: 0

Numerical Simulation of Space Charge Injection in LDPE under Relatively Low Electric Stress 低电应力下LDPE空间电荷注入的数值模拟

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772886

Y. Hayase, Y. Tanaka, T. Takada

{"title":"Numerical Simulation of Space Charge Injection in LDPE under Relatively Low Electric Stress","authors":"Y. Hayase, Y. Tanaka, T. Takada","doi":"10.1109/CEIDP.2008.4772886","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772886","url":null,"abstract":"In this report, we tried to simulate the behavior of space charge injection in low-density polyethylene (LDPE) under relatively low electric stress. In our previous paper, we found an interesting packet-like charge behavior in LDPE under high DC electric field of more than 100 kV/mm. It is thought that the huge packet-like charge must strongly affect to breakdown characteristics of LDPE. To analyze the feature of the packet-like charge behavior in LDPE, we have carried out a simple numerical simulation based on the experimental results in the previous paper. In the proposed model, by giving a few parameters of the sample, we can easily simulate the packet-like charge behavior. To investigate which parameter is dominant for the packet-like charge behavior, we attempt to apply our proposed model to various kinds of polyethylene which show different packet-like behavior from that in LDPE. However, the space charge accumulation process in LDPE under around or below 100 kV/mm has not explained using the model yet. From the experimental results, it was identified the space charge spread uniformly in the bulk under relatively low electric stress. To explain the behavior using the proposed model, it is necessary to concern the complicated parameters of charge injection and conductivity distribution. Therefore, as a first step, we tried to fit the numerical simulation results to the actual experimental results.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"163 1","pages":"157-160"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86351079","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: 3

Space Charge Dynamics in Nanostructured Epoxy Resin 纳米结构环氧树脂的空间电荷动力学

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772851

D. Fabiani, G. Montanari, A. Dardano, G. Guastavino, L. Testa, M. Sangermano

引用次数: 22

Dielectric Integrity of High-Temperature Nanocomposites 高温纳米复合材料的介电完整性

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772808

A. Travelpiece, J. K. Nelson, L. Schadler, D. Schweickart

引用次数: 8

Effect of Various Design Parameters on the Movement of Metallic Particles in a Three Phase Common Enclosure Gas Insulated Busduct 不同设计参数对三相共罩气体绝缘管道中金属颗粒运动的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772857

M. Rao, G. Kumar, J. Amarnath, S. Kamakshaiah

{"title":"Effect of Various Design Parameters on the Movement of Metallic Particles in a Three Phase Common Enclosure Gas Insulated Busduct","authors":"M. Rao, G. Kumar, J. Amarnath, S. Kamakshaiah","doi":"10.1109/CEIDP.2008.4772857","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772857","url":null,"abstract":"Metallic particle contamination in a compressed gas insulated busduct (GIB) or system (GIS) may lower the corona onset and breakdown voltage of the system considerably. These particles move randomly in a horizontally mounted GIB system due to the electric field, and this movement plays a crucial role in determining the insulation behavior of gas insulated substations. Under 50-Hz AC voltage, the particle motion is complex, and under appropriate conditions, the particle may cross the gaseous gap from the low-field region near the outer enclosure to the high-field region near the central conductor. For the commonly encountered size of metallic particles in practical gas insulated systems, such a crossing of the gaseous gap takes several cycles of the 50-Hz voltage. In order to determine the particle trajectories in a three-phase common enclosure gas insulated busduct (GIB) an outer enclosure of diameter 500 mm and inner conductors of diameters 64 mm spaced equilaterally are considered. Wire like particles of aluminum, copper as well as silver of a fixed geometry has been considered to be present on enclosure surface of a three-phase busduct. Simulation is carried out for movement of metallic particles in a three-phase busduct with reduced phase conductor diameter with a view to obtain optimum size of conductor for reliable operation. The work is carried out by reducing the original diameter of the conductor from 64 mm to 54 mm in steps of 5 mm.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 1","pages":"367-370"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89952169","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

Electrical breakdown strength of interfaces between solid insulation and transformer oil with variable water content 变含水量固体绝缘与变压器油界面的电击穿强度

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772816

M. Hasheminezhad, E. Ildstad, A. Nysveen

引用次数: 1

Research on the Synthetic Method for the Detection and Location of PD in GIS GIS中PD检测与定位的综合方法研究

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772908

K. Gao, Ling-Hui Yang, Jian-Hua Jiang, Zhao-Lin Liu

引用次数: 4

Evolution of structural properties of glass-mica-epoxy insulations along accelerated thermo-oxidative aging 玻璃云母-环氧树脂绝缘体结构性能随加速热氧化老化的演变

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772842

V. Boucher, P. Rain, G. Teissèdre, P. Schlupp

{"title":"Evolution of structural properties of glass-mica-epoxy insulations along accelerated thermo-oxidative aging","authors":"V. Boucher, P. Rain, G. Teissèdre, P. Schlupp","doi":"10.1109/CEIDP.2008.4772842","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772842","url":null,"abstract":"The stator windings of large air-cooled rotating machines are insulated with mica-glass fabric impregnated with epoxy. These composites are submitted to thermal, mechanical and electrical stresses. A specific aging arrangement has been setup allowing artificial thermo-oxidative aging of dielectric samples thanks to the application of a dry O2 pressure at a controlled temperature. Two different materials are considered: a class H material, designed to sustain temperatures up to 180degC, and a high conductivity (HC) tape material, which is a class F insulation. The samples were followed in mass and DMA (dynamic mechanical analysis). Similar profiles of mass evolution with various temperature and oxygen pressure contribute to validate the artificial aging procedure. DMA allowed determining the glass transition temperature (Tg) of the epoxy resin and observing the evolution of the network density of the polymeric matrix along aging. Delaminations of a few tens mum thick were observed within the samples after aging. These characterizations allowed the comparison between both materials.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"9 1","pages":"83-86"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75887828","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: 3

Research on Heat Transfer Enhancement of Dielectric Fluid in Electrostatic Field 静电场中介电流体强化传热的研究

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772856

Chuntian Chen, Duo Li, Lijian He, Xianyou Zhang

引用次数: 0