2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)最新文献_第10页

Application of the Thermal Step Method to characterize the charge ability of XLPE insulation with and without ethylacrylate copolymer 应用热步进法测定含有和不含丙烯酸乙酯共聚物的交联聚乙烯绝缘材料的带电能力

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963592

G. Platbrood, S. Agnel, A. Toureille

{"title":"Application of the Thermal Step Method to characterize the charge ability of XLPE insulation with and without ethylacrylate copolymer","authors":"G. Platbrood, S. Agnel, A. Toureille","doi":"10.1109/CEIDP.2001.963592","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963592","url":null,"abstract":"In Belgium, two types of high voltage underground power cables with different compositions have been installed, namely XLPE (an homopolymer cross linked polyethylene) and XLPE-EA copolymerized with ethylacrylate. The presence of space charge is now acknowledged to have a main role on electrical stresses applied to the insulation, and consequently in insulation lifetime. Part of the study was devoted to obtain a better characterization of their capacity of this two installed insulations to store space charges under AC. in this paper, results of space charge measurements by the Thermal Step Method (TSM) and Thermally Stimulated Depolarization Currents (TSDC) of cable pieces after the manufacturing, are presented. During alternative poling (65 kV RMS : 13 kV/mm RMS) of a 15 kV cable, only the XLPE cable stocks space charge after ten weeks. No charge has been observed in the XLPE-EA insulation after six months with the TSM technique. Some measurements have been carried out with a Scanning Electron Microscope (SEM) used in mirror mode. The bulk sample analysis by TSM and SEM used in mirror mode results are compared and conclusions are given for the XLPE-EA insulation in comparison with the XLPE. These results show differences between the two XLPE cables, and an evolution of the physical structure of the polyethylene insulation is highlighted.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130906824","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

Prediction of the breakdown voltage in a point-barrier-plane air gap using neural networks 用神经网络预测点势垒面气隙击穿电压

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963559

L. Mokhnache, A. Boubakeur

{"title":"Prediction of the breakdown voltage in a point-barrier-plane air gap using neural networks","authors":"L. Mokhnache, A. Boubakeur","doi":"10.1109/CEIDP.2001.963559","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963559","url":null,"abstract":"We have developed a neural network as tool for prediction of the breakdown voltage in a point-barrier-plane air gap for longest air gaps. We have used an array of figures from the experiments (tests) done in the HV laboratories of the Polytechnique University of Warsaw by A.Boubakeur (1979) changing many parameters of the air gap system. This shows promise for use in industry. The application of the radial basis function Gaussian network (RBGF) method trained by random optimisation method (ROM) is found to be very effective in its predictions. The choice of the RBFG method is argued by the fact that it's local characteristic avoids divergence problems. In practice, it would be very economical to use artificial neural networks in the investigations on high voltage insulation breakdown predictions. In fact, we may reduce the laboratory tests and let the network predict the remained breakdown voltages at longest distances. We may propose the application of this method to the prediction of other parameters (barrier width, barrier conductivity, air gap length, barrier hole diameter...); in general, in the case where we need to extrapolate non-linear functions giving their variation versus a given parameter.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133866954","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

Electroluminescence based determination of the space charge limited field 基于电致发光的空间电荷限制场测定

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963528

Yang Cao, S. Boggs

引用次数: 6

PD performance of dielectric insulations in presence of low frequency conducted disturbances: a life model approach 低频传导扰动下介电绝缘体的局部放电性能:寿命模型方法

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963542

M. di Lorenzo del Casale, P. Romano, R. Schifani

引用次数: 0

Effect of frequency on XLPE cable insulation at high electric field 高电场下频率对交联聚乙烯电缆绝缘的影响

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963513

S. Bamji, A. Bulinski, L. Cissé, K. Tohyama

引用次数: 4

Optimisation of a numerical model for analysis of partial discharge phenomena in a flat cavity 平板腔体局部放电现象分析数值模型的优化

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963639

R. Candela, R. Schifani, P. Romano

{"title":"Optimisation of a numerical model for analysis of partial discharge phenomena in a flat cavity","authors":"R. Candela, R. Schifani, P. Romano","doi":"10.1109/CEIDP.2001.963639","DOIUrl":"https://doi.org/10.1109/CEIDP.2001.963639","url":null,"abstract":"The failure probability of the insulation in HV components can be studied through partial discharge (PD) measurements to detect defects. A numerical model, previously developed by the authors for the simulation of PD activity in a spherical void embedded in epoxy resin, is implemented for a flat cavity under a divergent electric field. This simulates very well the real working conditions encountered in the insulation of electrical machines. The model is developed taking into account all the geometric and electrical parameters, and a fine examination on physical parameters playing a fundamental role on the PD phenomenon is carried out. In particular, a more accurate formulation of the work function and a finite elements analysis (FEA) of the electric field inside the cavity has been applied. A new approach is investigated to reproduce the uncertainty of the discharge phenomenon. A probability function distribution, obtained by Weibull analysis, gains the best results. In order to obtain the best fitting of the model output to the experimental PD data, a strong procedure based on an heuristic algorithm is performed. This algorithm detects the minimum of a quality function that evaluates the distance between the PD patterns of the numerical model and of the experimental data. After a description of the numerical model adopted, a comparison between the experimental and the simulated data are presented together with comments and remarks.","PeriodicalId":112180,"journal":{"name":"2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225)","volume":"184 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-10-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121271693","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: 6

Remote and non-intrusive diagnostics of high-voltage insulation materials using laser-induced fluorescence spectroscopy 利用激光诱导荧光光谱技术对高压绝缘材料进行远程非侵入性诊断

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963574

A. Larsson, Albin Roslund, A. Dernfalk, S. Gubanski

引用次数: 6

The effect of a finite conductivity on the stability of a falling liquid film subjected to a normal electric field 在正常电场作用下，有限电导率对下降液膜稳定性的影响

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963596

A. Gonzalez, A. Castellanos

引用次数: 0

A brief history of gaseous dielectrics research at NIST NIST气体介电学研究简史

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963539

J. Olthoff, L. Christophorou

引用次数: 1

Combined space charge and electroluminescence detection in polyethylene under AC stress 交流应力下聚乙烯的空间电荷和电致发光联合检测

2001 Annual Report Conference on Electrical Insulation and Dielectric Phenomena (Cat. No.01CH37225) Pub Date : 2001-10-14 DOI: 10.1109/CEIDP.2001.963482

G. Tardieu, G. Teyssèdre, C. Laurent, G. Montanari, L. Raffaelli

引用次数: 5