2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第8页

Relative Permittivity of TiO2/Silicone Elastomer Composite Stretched in Uniaxial Direction 单轴拉伸TiO2/有机硅弹性体复合材料的相对介电常数

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544913

K. Naya, M. Kurimoto, T. Kato, Y. Suzuoki

引用次数: 2

Partial Discharge Measurements under DC Voltages Containing Harmonics Produced by Power Electronic Devices 电力电子设备产生的含谐波直流电压下的局部放电测量

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544850

P. Romano, A. Parastar, A. Imburgia, J. Blennow, M. Bongiorno, A. D. Di Tommaso, T. Hammarström, Y. Serdyuk

{"title":"Partial Discharge Measurements under DC Voltages Containing Harmonics Produced by Power Electronic Devices","authors":"P. Romano, A. Parastar, A. Imburgia, J. Blennow, M. Bongiorno, A. D. Di Tommaso, T. Hammarström, Y. Serdyuk","doi":"10.1109/CEIDP.2018.8544850","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544850","url":null,"abstract":"Partial Discharge (PD) monitoring is one of the main diagnostic instrument to evaluate the reliability of modern electrical transmission and distribution systems. The widespread use of High voltage dc (HVDC) connections increase the demand of voltage source converters (VSCs) which, as a consequence, has brought about new challenges in the field of partial discharge measurements. In fact, the output voltage waveforms generated by AC/DC modular multilevel converters (MMCs) are affected by a significant harmonic content which influences the Partial Discharges (PDs) activity. For this reason, previous research mainly investigated the PD phenomenon on the AC side of the converter. The aim of the present work was to evaluate the PDs behavior applying a voltage waveform containing ripple at the DC side of the converter. At first, a pure DC voltage has been used to stress the tested specimen and then harmonic content has been added by chancing the number of modules of the simulated AC/DC converter. For the different generated waveforms, measurements of PDs have been carried out and a comparison of the different PDs pattern have been made. The effect on the PDs behavior has been also evaluated for different switching frequencies.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130985819","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: 13

From Polyethylene to Polystyrene: First Principles Prediction of carrier mobility 从聚乙烯到聚苯乙烯:载流子迁移率的第一性原理预测

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544764

M. Sato, A. Kumada, K. Hidaka

{"title":"From Polyethylene to Polystyrene: First Principles Prediction of carrier mobility","authors":"M. Sato, A. Kumada, K. Hidaka","doi":"10.1109/CEIDP.2018.8544764","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544764","url":null,"abstract":"Recently, we have successfully evaluated the carrier transfer properties in polyethylene (PE) with the aid of a first-principles based multi-scale modeling method. In order to develop a framework for materials design, it is crucial to assess the robustness and versatility of our model. Thus, in this study, carrier transfer properties in benzene doped PE oligomer, which gives implications of that in polystyrene (PS) is investigated. Both the partial density of states of benzene/PE oligomer cluster and the ionization energies of benzene molecules and PE oligomers show that hole localized states at benzene molecules are energetically favorable compared to those at PE oligomers. Indeed computed hole hopping rates from PE oligomers to benzene molecules are larger than those from benzene molecules to PE oligomers. However, since (1) the reorganization energy of hole transfer between PE oligomers (- 900 meV) are larger than those between PE oligomers and benzene molecules (~ 600 meV), and (2) the electronic couplings between PE oligomers are (~ 10meV) smaller than that between PE oligomers and benzene molecules (several tens of meV), hole hopping rates from benzene molecules to PE oligomers are larger than those between PE oligomers. Accordingly, the hole mobility in benzene doped PE oligomer increases with increasing benzene concentration. This is in line with experimental findings that the hole mobility in PS is larger than that in PE. These findings emphasize the necessity of evaluating the microscopic parameters that are relevant to carrier transfer.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127482534","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

The Impact of Crevice Corrosion on Copper Winding in Insulating Oil with Corrosive Sulfur 含腐蚀性硫绝缘油中缝隙腐蚀对铜绕组的影响

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544871

Yuan Yuan, Jiang Youdong, Liu Guoyong, Zhou Jiang, Liao Ruijin

引用次数: 0

Moisture Ingress of Metallized Film Capacitor under High Temperature and Different Humidity Condition 高温和不同湿度条件下金属化膜电容器的吸湿特性

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544882

Qiren Chen, Hua Li, Lu Li, Haoyu Jiang, Yi Liu, Qin Zhang, Fuchang Lin, Chenchen Zhang

引用次数: 5

Effect of Short Circuit Currents on Thermo-mechanical Properties of Insulated Cables 短路电流对绝缘电缆热机械性能的影响

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544740

M. Hamdan, J. Pilgrim, P. Lewin

引用次数: 0

Difference of Discharge Phenomena under GFRP and CFRP Insulation Barrier with Steep Impulse Voltage 冲击电压大时GFRP与CFRP绝缘屏障放电现象的差异

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544753

N. Tanaka, D. Aoyagi, R. Sasamoto, Y. Izawa, K. Nishijima

{"title":"Difference of Discharge Phenomena under GFRP and CFRP Insulation Barrier with Steep Impulse Voltage","authors":"N. Tanaka, D. Aoyagi, R. Sasamoto, Y. Izawa, K. Nishijima","doi":"10.1109/CEIDP.2018.8544753","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544753","url":null,"abstract":"Recently, many researchers focus on glass fiber reinforced plastic (GFRP) and carbon fiber reinforced plastic (CFRP) materials because these materials have superior mechanical properties. Therefore, their electrical insulation performance must be revealed. Especially, the discharge which occurred under insulation barriers has not been revealed. So, we have investigated the discharge phenomena under GFRP and CFRP insulation barriers. In this study, we used a needle-plane short air gap in the discharge chamber. The insulation barrier was placed 2 mm below the brass needle electrode and 5 mm above the plane electrode. Synthetic air (N2 (79%)/O2 (21%)) or room air was injected into the chamber at atmospheric pressure. The steep impulse voltages were repeatedly applied to the needle electrode. As a result, the surface discharge (SD), it developed in both gases on GFRP insulation barrier. However, it didn't develop on CFRP insulation barrier. Regarding the discharges under GFRP insulation barrier (barrier-plane discharges: BPDS), they mainly appeared in its center area at synthetic air. On the other hand, the discharges under CFRP insulation barrier appeared in overall area at both gases. In addition, the discharges were not occurred with the standard lightning impulse voltage.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114796443","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

The Influence of Electric Field Distribution on Insulator Surface Flashover 电场分布对绝缘子表面闪络的影响

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544732

Lin Liu, Xiaoang Li, Qiaogen Zhang, Chengjun Liang, Haiyang Ren, Junping Zhao, Zhibing Li

{"title":"The Influence of Electric Field Distribution on Insulator Surface Flashover","authors":"Lin Liu, Xiaoang Li, Qiaogen Zhang, Chengjun Liang, Haiyang Ren, Junping Zhao, Zhibing Li","doi":"10.1109/CEIDP.2018.8544732","DOIUrl":"https://doi.org/10.1109/CEIDP.2018.8544732","url":null,"abstract":"Insulator surface flashover is one of the main causations for the gas insulated metal enclosed switchgear (GIS) devices failure. The local electric field enhancement is the intrinsic reason for the surface discharge. To clarify the relationship between insulator surface flashover and its surface electric field distribution, we manufactured insulator samples with various shapes and embedded electrodes, then studied their flashover voltage under the standard lightning impulse in a vessel filled with 0.2 MPa pure SF6gas. In addition, we simulated the surface electric field distribution of samples by the finite element method, and analyzed the relationships between the maximum and average value of surface electric field strength. As a result, conclusions come as follows. As the size of the embedded electrodes increases, the flashover voltage of wave and concave insulators decreases, while that of the convex shape increases. The total surface electric field is of the greatest impact on the flashover voltage. The tangential component of the surface electric field contributes more than the normal component in the flashover voltage, but the latter could affect the flashover arc direction. In all case, the surface flashover initiation condition in this paper is about 75 kV/(mm·MPa) which is lower than the critical condition of 88.5 kV/(mm·MPa) in the SF6 gas gap.","PeriodicalId":377544,"journal":{"name":"2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121465177","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: 4

Ferroelectrets Filled with a High Breakdown-Strength Gas 充满高击穿强度气体的铁电极体

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544754

William D. Joysey, A. Mellinger

引用次数: 1

Issues in Space Charge Measurments with the PEA Technique in HVDC Cables: Applicative Case Study 高压直流电缆中PEA技术空间电荷测量中的问题:应用案例研究

2018 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2018-10-01 DOI: 10.1109/CEIDP.2018.8544833

M. Albertini, S. F. Bononi, S. Giannini, I. Troia, G. Sica, G. Mazzanti, Dario Pini

引用次数: 1