Proceedings of 2011 International Symposium on Electrical Insulating Materials最新文献

Study on simulation of fiber optic current sensor 光纤电流传感器的仿真研究

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-07 DOI: 10.1109/ISEIM.2011.6826282

Dai Wan, N. Chen, L. Zhong, Qinxue Yu, George Chen

引用次数: 1

Preparation and charge transport of polyimide insulating nanocomposite films 聚酰亚胺绝缘纳米复合薄膜的制备及电荷输运

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-06 DOI: 10.1109/ISEIM.2011.6826266

J. Zha, Z. Dang, George Chen

引用次数: 1

Effect of surface charge distribution on the electric field in a void due to partial discharges 局部放电时表面电荷分布对空洞电场的影响

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-06 DOI: 10.1109/ISEIM.2011.6826278

H. Illias, G. Chen, P. Lewin

引用次数: 2

Preparation of new microporous carbon and its electrochemical performance for electric double-layer capacitors application 新型微孔碳的制备及其双电层电容器的电化学性能

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-06 DOI: 10.1109/ISEIM.2011.6826356

Z. A. Noorden, T. Hirabayashi, M. Fujisaki, S. Matsumoto

{"title":"Preparation of new microporous carbon and its electrochemical performance for electric double-layer capacitors application","authors":"Z. A. Noorden, T. Hirabayashi, M. Fujisaki, S. Matsumoto","doi":"10.1109/ISEIM.2011.6826356","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826356","url":null,"abstract":"The need of energy storage device with higher rating for wider application range has led to a great interest among engineers and researchers in proposing better materials for the device electrodes. The paper reports our current research progress in developing a new higher rating energy storage device like an electric double-layer capacitor (EDLC). New microporous carbons were systematically prepared by chemical reaction between mineral oil and strong acid, sulphuric acid, in various compositions. The graphitic nature of the produced microporous carbons were characterized by X-ray diffraction (XRD) measurement. Essential electrical properties of the microporous carbons for energy storage application, such as their capacitive behavior, were investigated by cyclic voltammetry measurements. In order to observe the frequency characteristics of the microporous carbons, one of the most important analytical tools known as electrochemical impedance spectroscopy was used. The experimental results of the XRD and electrochemical measurements are presented in forms of graphical plot.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123623597","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 AC breakdown and space charge characteristics of LDPE in the presence of crosslinking byproduct 交联副产物存在时LDPE的交流击穿和空间电荷特性

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-06 DOI: 10.1109/ISEIM.2011.6826304

N. Hussin, Junwei Zhao, George Chen

引用次数: 6

Fundamental study on location of water tree degradation in power cables 电力电缆中水树退化位置的基础研究

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826335

Myonghwan Kim, Y. Murakami, M. Nagao, T. Kurihara, T. Okamoto, T. Tsuji, N. Hozumi

{"title":"Fundamental study on location of water tree degradation in power cables","authors":"Myonghwan Kim, Y. Murakami, M. Nagao, T. Kurihara, T. Okamoto, T. Tsuji, N. Hozumi","doi":"10.1109/ISEIM.2011.6826335","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826335","url":null,"abstract":"Water tree is a degradation mode of power cable with polymeric insulation. A water tree is composed of small droplets filled with water. As the conductivity in water tree is very high, it leads to dielectric breakdown when it grows up. As inside the water tree is filled with trap sites, it is poled with a certain distribution of relaxation time, when a poling voltage is applied. Although its depolarization process after removing the poling voltage is determined by ambient temperature, applying a “depolarizing voltage” with the opposite polarity can accelerate the relaxation process. If a short pulse propagating through the cable is employed as a depolarization voltage, we may locate the water tree by looking at the time-resolved pulse response. This would lead to a diagnosing method with spatial resolution. In order to retain 100 m of spatial resolution, the response should be as sharp as 1 μs. Based on the feasibility study with preliminary experiment, we constructed a measurement system for cable with a long length. In order to upgrade sensitivity and resolution, we introduced several techniques like noise canceling and digital signal processing. The degraded point in a 400 m mimic cable line was successively located.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114678617","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

Detection of rust in coated steel plates using terahertz waves 利用太赫兹波检测涂层钢板的锈蚀

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826308

N. Fuse, T. Takahashi, T. Fukuchi, N. Kawai, T. Shiina, M. Mizuno, K. Fukunaga

引用次数: 3

Effect of different coning angles on flashover characteristics across machinable ceramic in vacuum 不同锥角对真空可加工陶瓷闪络特性的影响

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826293

Xue-Zeng Huang, Jiang-Yang Zhan, Nan Zheng, H. Mu, Guanjun Zhang

{"title":"Effect of different coning angles on flashover characteristics across machinable ceramic in vacuum","authors":"Xue-Zeng Huang, Jiang-Yang Zhan, Nan Zheng, H. Mu, Guanjun Zhang","doi":"10.1109/ISEIM.2011.6826293","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826293","url":null,"abstract":"Surface flashover in vacuum is a kind of complicated surface and interface phenomena, which seriously restricts the development of high voltage electro-vacuum devices. Introducing a kind of machinable ceramic with excellent machinable performance and good surface electrical capability into vacuum insulation system, and considering the commonly used truncated cone structure, machinable ceramic samples with different coning angles are machined. Their surface flashover voltage are investigated under pulsed voltage in vacuum, and the electric field distributions and surface charge density of different coning angles are numerically simulated. The experimental results indicate that, the flashover voltage of cone insulators is higher than that of cylindrical insulators, the flashover voltage of truncated cone samples with positive coning angle is much higher than that of with negative coning angles, and the flashover voltage with ~45° conical frustum is highest. It is considered that, the coning angle plays an important role on the electric field of cathode triple junction (CTJ) and surface charge distribution. When the coning angle is positive, the electric field of CTJ and surface charge distribution is smaller, and when the coning angle is negative, these values are bigger, so its higher CTJ electric field and surface charge result in a lower flashover voltage than that with positive angle, and also the short free path of electrons and decreased energy of electrons colliding with insulator surface lead to a higher flashover voltage than that of cylindrical insulators.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114435785","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

Development of breakdown in solid/gel insulators under AC voltage 交流电压下固体/凝胶绝缘子击穿的研究进展

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826372

M. Fujii, S. Akamatsu, H. Ihori

引用次数: 1

Effect of surface condition on the evaluation of hydrophobicity of polymer insulator 表面条件对聚合物绝缘子疏水性评价的影响

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826310

T. Tokoro, Seiya Kojima, M. Nagao

引用次数: 4