2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第3页

Diagnosis of Multiple Impedance Mismatch Segments in Power Cables Based on Frequency Domain Reflection Method 基于频域反射法的电力电缆多阻抗失配段诊断

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705349

K. Zhou, Yating Cao, Pengfei Meng, S. Akram, Yu-xuan Jin, Tao Zhou, Jin Yang, Yuming Wu

{"title":"Diagnosis of Multiple Impedance Mismatch Segments in Power Cables Based on Frequency Domain Reflection Method","authors":"K. Zhou, Yating Cao, Pengfei Meng, S. Akram, Yu-xuan Jin, Tao Zhou, Jin Yang, Yuming Wu","doi":"10.1109/CEIDP50766.2021.9705349","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705349","url":null,"abstract":"Cross linked polyethylene (XLPE) cable has been widely used in urban power transmission and distribution system. The accurate location of cable partial defect is of great significance to maintain the safe operation of the cable. In this research, a method of cable partial defect diagnosis based on frequency domain reflectometry (FDR) is proposed. Firstly, the mathematical model of cable transmission line is established, and the basic principle of this method is described. Then, the Dolph-Chebyshev window function is selected to eliminate the inaccuracy of positioning results caused by signal spectrum leakage. And through the feasibility of this method is explored by establishing a simulation model. Finally, several experiments were carried out on 10kV XLPE cables in Chengdu. The results show that the diagnosis conclusions of cable intermediate joints and local defects location are basically consistent with the cable account information and the actual situation. Which indicate that the method is feasible for locating and diagnosing local defects and intermediate joints.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"64 1","pages":"215-220"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81281308","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

Maintenance of natural ester transformers: case studies 天然酯变压器的维护:案例研究

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705430

Erika Breda, L. Calcara, Matteo Banditelli, M. Pompili, Simone Sacco

{"title":"Maintenance of natural ester transformers: case studies","authors":"Erika Breda, L. Calcara, Matteo Banditelli, M. Pompili, Simone Sacco","doi":"10.1109/CEIDP50766.2021.9705430","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705430","url":null,"abstract":"In the last two decades, the number of applications of natural esters (NE) transformers is steeply growing, requiring also proper monitoring and maintenance of the quality of the insulating liquid. Nevertheless, reference values and alert limits are not yet completely available with reference to different classes of the transformers. Some helps may be sorted out from the recent publication (2021-01) of the IEC 62975 \"Natural esters - Guidelines for maintenance and use in electrical equipment\" which contains useful additional information for the operators in NE transformers.To overcome this situation, there is an effort to look for similarities with traditional transformers insulated with mineral oil (MO) for which a great amount of information on chemical-physical analysis are already available. In the present paper, case studies of some Natural Ester (NE) transformers maintenance have been presented and discussed. The acquired data will be also useful with the aim of adjusting the Health Index evaluation in order to guarantee support for maintenance decisions of the operators in this sector.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"89 1","pages":"559-562"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83882217","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

Evolution of Space Charge with Increasing Electric Field in High Temperature Materials Used in Hybrid Propulsion Systems 混合动力推进系统高温材料中空间电荷随电场增大的演化

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705412

Mohamadreza Arab Baferani, Tohid Shahsavarian, Chuanyang Li, Yang Cao

引用次数: 0

Self-assembly 2D Montmorillonite Coating to Impede Charge Injection to Polystyrene 自组装二维蒙脱土涂层阻止电荷注入聚苯乙烯

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705436

Chao Wu, A. M. LaChance, Jierui Zhou, Ningzhen Wang, Peinan Zhou, Luyi Sun, Yang Cao

引用次数: 0

Correlation of Diffusion Limited Oxidation to Color Difference in Accelerated Aging of Electrical Cable Insulation 电缆绝缘加速老化中扩散限制氧化与色差的关系

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705346

Witold K. Fuchs, Mychal P. Spencer, Donghui Li, Y. Ni, Andy Zwoster, L. Fifield

{"title":"Correlation of Diffusion Limited Oxidation to Color Difference in Accelerated Aging of Electrical Cable Insulation","authors":"Witold K. Fuchs, Mychal P. Spencer, Donghui Li, Y. Ni, Andy Zwoster, L. Fifield","doi":"10.1109/CEIDP50766.2021.9705346","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705346","url":null,"abstract":"Diffusion limited oxidation (DLO) as a phenomenon has complicated material lifetime predictions from accelerated aging studies. Many methods to analyze DLO have been developed in recent years. However, an analytical tool for high throughput and low-cost analysis of DLO affected samples remains absent from the literature. Color differences in polymers exposed to oxidative conditions have recently been observed and correlated to increased concentrations of oxidation products. Herein, total color difference was utilized to rapidly quantify DLO in ethylene propylene rubber (EPR) polymeric cable insulation specimens. Insulation specimens were aged at 121 °C, 136 °C, 150 °C, and 165 °C and a 10% ΔE*ab difference between the specimen edge and specimen center was used as the threshold for DLO. Based on these specifications DLO was observed in EPR insulation specimen at temperatures of 136 °C and above, with an increasing degree of DLO observed as the time of exposure increased. The method presented in this work represents a quantitative and high-throughput method for the investigation of DLO with a low cost barrier for entry.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"2 1","pages":"639-642"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80192000","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

Transient Electric and Thermal Fields in a HVDC cable 高压直流电缆中的瞬变电场和热场

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705374

Sathyamoorthy Dhayalan, B. S. Thind, C. Reddy

引用次数: 1

The Impact of Thermal Stresses on Volume Resistivity: Performance Comparison between TR-XLPE and XLPE Cables 热应力对体积电阻率的影响:TR-XLPE与XLPE电缆的性能比较

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705437

Jasem Mohammed, S. Refaat, H. Abu-Rub, M. Olesz, J. Guzinski

引用次数: 0

Effect of Surface-Modified TiO2 and MgO Nanoparticles on Dielectric Permittivity and Breakdown Strength of PP Nanocomposites 表面改性TiO2和MgO纳米颗粒对PP纳米复合材料介电常数和击穿强度的影响

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705393

Phichet Ketsamee, T. Andritsch, A. Vaughan

引用次数: 3

Examination of voltage-current characteristics of corona discharge in an electrostatic precipitator in case of significant dust space charge 粉尘空间电荷较大时静电除尘器电晕放电电压-电流特性的研究

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705458

I. Kiss, L. Székely, R. Cselkó

引用次数: 0

Novel Diagnosis Criteria for Moisture Defect of Oil-paper Bushing Based on High Voltage Frequency Domain Dielectric Spectroscopy 基于高压频域介电光谱的油纸衬套水分缺陷诊断新准则

2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2021-12-12 DOI: 10.1109/CEIDP50766.2021.9705413

Qifu Lu, W. Ran, Quan Shi, Ting Yan, C. Gao, B. Qi

{"title":"Novel Diagnosis Criteria for Moisture Defect of Oil-paper Bushing Based on High Voltage Frequency Domain Dielectric Spectroscopy","authors":"Qifu Lu, W. Ran, Quan Shi, Ting Yan, C. Gao, B. Qi","doi":"10.1109/CEIDP50766.2021.9705413","DOIUrl":"https://doi.org/10.1109/CEIDP50766.2021.9705413","url":null,"abstract":"As we all know, the excess moisture in oil-paper insulated bushing is the main factor that causes insulation failure, and the commonly used diagnosis method for this is the frequency domain dielectric response method. However, most of the conventional dielectric spectrum data is measured at a voltage below 200 V, which is susceptible to environmental noise interference during field testing, resulting in larger measurement errors. So this paper designs a high-voltage frequency domain dielectric spectrum measurement device for wetting degree diagnosis of oil-paper insulated bushings. Based on the self-developed measurement platform, it is found that, the dielectric spectrum data of the dry bushing model does not change significantly with the increase in voltage; while the dielectric spectrum curve of the wetting model moves up significantly. Moreover, the rate at which low-frequency dielectric loss increases with voltage is positively correlated with the moisture content in the paper. Besides, for local moisture defect conditions, traditional dielectric analyzers may not be able to provide accurate diagnostic information of insulation defects, but the high-voltage dielectric spectroscopy technology can make its unique contribution.","PeriodicalId":6837,"journal":{"name":"2021 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"20 1","pages":"287-290"},"PeriodicalIF":0.0,"publicationDate":"2021-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76496779","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