Proceedings of 2011 International Symposium on Electrical Insulating Materials最新文献_第10页

Dielectric characteristic of insulating paper - Ice composite material in liquid nitrogen 绝缘纸-冰复合材料在液氮中的介电特性

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1541/IEEJFMS.133.123

T. Kawashima, M. Kunmoto, Y. Murakami, M. Nagao

引用次数: 1

Properties of discharges in liquid and simulation using Whitehead equivalent circuit 液体放电特性及Whitehead等效电路模拟

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826367

Suwarno

{"title":"Properties of discharges in liquid and simulation using Whitehead equivalent circuit","authors":"Suwarno","doi":"10.1109/ISEIM.2011.6826367","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826367","url":null,"abstract":"Liquid insulations are widely used in high voltage equipments. Partial discharges may occur in liquid insulating materials in the form of streamers. For diagnosis purpose, understanding of discharges in the insulations is important. This paper reports experimental results of partial discharges (PD) in silicone oil under divergent AC electric field obtained using needle-plane electrode system. The discharges occurred were measured by using a phase-resolved partial discharge measurement system. The PD parameters such as magnitude, phase angle of occurrence and number were analyzed. The measurement results indicated that at the initiation stage, negative discharges were observed first before positive discharges occurred at a higher applied voltage. The PD patterns showed the strong roles of instantaneous applied voltage on the PD magnitude as well as PD probability. The PD pulses concentrated around the peak of applied voltage. Overall measured data showed a small unbalance between positive and negative PD. For a deeper understanding, a computer simulation of PD patterns in liquid insulating material was done by using Whitehead PD electrical equivalent circuit. The equivalent circuit contains capacitors and a spark gap. The simulated phase-resolved PD patterns were compared to those experimental results. The simulated PD patterns were similar to those experimental results. The results indicated that Whitehead PD electrical equivalent circuit is suitable for representing PD in liquid rather than in solid.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"9 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":"120949924","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

Variation of surface charge distribution in the process of PD degradation PD降解过程中表面电荷分布的变化

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826363

Cheng Pan, Yongpeng Meng, Kai Wu

引用次数: 1

The impulse current degradation of ZnO varistor ceramics ZnO压敏电阻陶瓷的脉冲电流降解

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826272

Xuetong Zhao, Jianying Li, Huan Li, Shengtao Li

引用次数: 4

A study of defective characteristics on HVAC insulators for 33 kV distribution system 33kv配电系统暖通空调绝缘子缺陷特性研究

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826357

Supakorn Nookuea, S. Chotigo, B. Pungsiri

{"title":"A study of defective characteristics on HVAC insulators for 33 kV distribution system","authors":"Supakorn Nookuea, S. Chotigo, B. Pungsiri","doi":"10.1109/ISEIM.2011.6826357","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826357","url":null,"abstract":"This research compared the electrical characteristics of insulators for 33 kV distribution system of Provincial Electricity Authority of Thailand. The insulator used in this present work is suspension type, class 52-1. The breakdown voltage of defective insulators in dry and uncontaminated condition under AC voltage is compared. The insulators were arranged into 3 main formats: (1) three good insulators and one broken insulator (2) two good insulators and two broken insulators (3) one good insulator and three broken insulators. The 1st and 3rd formats were subdivided into four arrangements while the 2nd format was subdivided into 6 formats depending upon the position of good and broken insulators. Test results showed that the value of breakdown voltage depended upon the position of good and broken insulators. Also, the breakdown voltage of the 2nd format with the 5th subdivision, good insulators were at 1st (top) and 3rd positions while broken insulators were at 2nd and 4th positions, was highest. The insulator installation for testing and its atmospheric correction factor followed ANSI C29.1-1988.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"10 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":"128697712","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

Technical history and future prospects of cast epoxy resin systems for heavy electrical insulation materials 重型电绝缘材料用铸造环氧树脂体系的技术历史与前景展望

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826393

S. Hishikawa

引用次数: 0

Quantitative evaluation of nano-silica dispersion in silicone nanocomposites and its resistance to erosion and tracking 纳米二氧化硅在有机硅纳米复合材料中的分散性及其抗侵蚀和跟踪性能的定量评价

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826292

T. Tominaga, M. Kozako, M. Hikita, R. Inoue, T. Kondo, G. Ueta, S. Okabe

引用次数: 3

Application-oriented researches on nanocomposite insulating materials 面向应用的纳米复合绝缘材料研究

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826399

T. Imai, Hiroaki Cho, Yusuke Nakamura, K. Yamazaki, G. Komiya, K. Murayama, F. Sawa, H. Sekiya, T. Ozaki, Toshio Shimizu

引用次数: 1

Partial discharge characteristics of epoxy resin-based nanocomposites fabricated with atomospheric plasma treated SiO2 nanoparticles 大气等离子体处理SiO2纳米颗粒制备环氧树脂基纳米复合材料的局部放电特性

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826342

W. Yan, B. T. Phung, Z. J. Han, K. Ostrikov, T. Blackburn

{"title":"Partial discharge characteristics of epoxy resin-based nanocomposites fabricated with atomospheric plasma treated SiO2 nanoparticles","authors":"W. Yan, B. T. Phung, Z. J. Han, K. Ostrikov, T. Blackburn","doi":"10.1109/ISEIM.2011.6826342","DOIUrl":"https://doi.org/10.1109/ISEIM.2011.6826342","url":null,"abstract":"Favourable insulation properties can be obtained by the incorporation of nano-dimension particles into base polymer substances as the resultant large interface area between polymer molecules and nanoparticles alters the macro dielectric characteristics of the composite material. In this study, surface plasma treatment was carried out using atmospheric pressure glow discharge Helium plasma on silane-grafted SiO2 nanoparticles before the fabrication of the nanocomposite. The surface energy of the particles was increased after such modification. Epoxy resin/SiO2 nanocomposites were fabricated by employing untreated and treated nanoparticles respectively. Insulation performances of the nanocomposites were evaluated in terms of the resistance against partial discharge (PD) and the breakdown strength. Test results showed that the PD levels of the nanocomposites, both with untreated and plasma treated nano-fillers, were noticeably reduced compared to that of the pure epoxy resin sample. As a result, the electrical endurance of nanocomposite was improved. A higher PD inception and dielectric breakdown strength were also detected in nanocomposite samples. A comb-like spectrum was observed in the PD level trend of nanocomposites. Although the sample with plasma treated nanoparticles had a higher PD density, the endurance was noticeably reinforced over the one with the untreated SiO2.","PeriodicalId":360527,"journal":{"name":"Proceedings of 2011 International Symposium on Electrical Insulating Materials","volume":"1 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":"131310629","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

Culture experiments for mouse fibroblast using conductive polymers 导电聚合物培养小鼠成纤维细胞实验

Proceedings of 2011 International Symposium on Electrical Insulating Materials Pub Date : 2011-09-01 DOI: 10.1109/ISEIM.2011.6826269

M. Onoda, Y. Abe, K. Tada

引用次数: 0