2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献

Influence of nano-titanium dioxide (TiO2) on electrical tree characteristics in silicone rubber based nanocomposite 纳米二氧化钛(TiO2)对硅橡胶基纳米复合材料电树特性的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-12-01 DOI: 10.1109/CEIDP.2013.6748120

M. Musa, Y. Arief, Z. Abdul-Malek, M. H. Ahmad, A. Jamil

{"title":"Influence of nano-titanium dioxide (TiO2) on electrical tree characteristics in silicone rubber based nanocomposite","authors":"M. Musa, Y. Arief, Z. Abdul-Malek, M. H. Ahmad, A. Jamil","doi":"10.1109/CEIDP.2013.6748120","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748120","url":null,"abstract":"Electrical tree is recognized as one of the pre-breakdown phenomena that occurs in high voltage insulation material. In addition, under high divergent field, the electrical tree grows rapidly and severely which may cause the breakdown of insulation to occur. In view of foregoing, nano-filler was added into the base insulating materials to enhance their properties against the growth of electrical tree. Thus in this study, nano-titanium dioxide was chosen as filler in order to improve the characteristics of silicone rubber which in turn inhibits the growth of electrical tree. The test samples were prepared in the form of leaf-like specimen. Nano-titanium dioxide was chosen as filler in order to improve the characteristics of silicone rubber. The number of partial discharge occurrence, partial discharge magnitude and breakdown time of the nanocomposites were investigated under different percentage of nano-titanium dioxide. The applied voltage and frequency were fixed at 10 kVrms AC and 50 Hz respectively. Treeing growth was recorded and partial discharge was observed at the constant applied voltage. The findings in this research showed that under high concentration of nano titanium dioxide, the treeing propagation were reduced and partial discharge number increased. The function of nano titanium dioxide as obstacle for the tree path in the silicone rubber samples was successfully tested. The results have shown that physical bonding between nano-titanium dioxide and silicone rubber matrix was improved, the tree propagation speed decreased, and this resulted in the increment of partial discharge magnitude. However, further experimentation is required to give more clarifications regarding to this finding.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133855874","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: 15

Experimental study on the dielectric properties of a liquid crystal polymer 液晶聚合物介电性能的实验研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-12-01 DOI: 10.1109/CEIDP.2013.6748209

Pengli Yang, Y. Ohki

引用次数: 0

Measurements of THz absorption peaks in photo-degraded polyethylene and their assignment by quantum chemical calculations 光降解聚乙烯中太赫兹吸收峰的测量及其量子化学计算分配

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-12-01 DOI: 10.1109/CEIDP.2013.6747437

M. Hosobuchi, M. Komatsu, X. Xie, Y. Cheng, Y. Furukawa, Y. Ohki, M. Mizuno, K. Fukunaga

引用次数: 3

Charge transport characteristics in epoxy resin at high temperatures based on electrode polarization analysis 基于电极极化分析的环氧树脂高温下电荷输运特性

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-12-01 DOI: 10.1109/CEIDP.2013.6747418

Fuqiang Tian, Y. Ohki

引用次数: 10

Phenomenon of secondary reverse streamer in an ester transformer liquid under lightning impulse voltage 雷击电压作用下酯类变压器液中二次反流光现象

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-23 DOI: 10.1109/CEIDP.2013.6748291

Q. Liu, Z. Wang

引用次数: 2

Comparison of streaming electrification characteristics between an ester liquid and a mineral oil using rotating disc method 用旋转圆盘法比较酯类液体和矿物油的流化带电特性

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-23 DOI: 10.1109/CEIDP.2013.6748315

Q. Liu, Z. Liu, G. Yang

{"title":"Comparison of streaming electrification characteristics between an ester liquid and a mineral oil using rotating disc method","authors":"Q. Liu, Z. Liu, G. Yang","doi":"10.1109/CEIDP.2013.6748315","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748315","url":null,"abstract":"Streaming electrification phenomenon seen in power transformers results from forced oil circulation. This phenomenon has been extensively investigated since it was identified as one of the failure reasons for large power transformers. The majority of the published research focused on the streaming electrification of mineral oils. Taking into account the potential increase in the voltage level and capacity of ester liquid filled power transformers, the present study used a rotating disc system and compared the streaming electrification characteristics of a synthetic ester with those of a conventional mineral oil. The rotational speed was varied between 100 rpm and 1000 rpm, and the oil temperature was varied between 20 °C and 80 °C. Both aged and unaged oil samples were used to form the oil-pressboard interfaces. The measurement results indicate that the synthetic ester exhibits a stronger ability to generate streaming current than the mineral oil. The subsequent experiments show that the streaming current generated in the mineral oil increases as a result of ageing, whereas that in the synthetic ester decreases. The relaxation times of the two liquids have also been estimated. The results suggest that the mineral oil has a much larger relaxation time than the synthetic ester. For both types of oil, ageing results in decreases in their relaxation times.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131374157","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

AC breakdown voltage and viscosity of mineral oil based fullerene nanofluids 矿物油基富勒烯纳米流体的交流击穿电压与粘度

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6748151

H. Jin, T. Andritsch, P. Morshuis, J. Smit

引用次数: 14

Thermal conductivity of fullerene and TiO2 nanofluids 富勒烯和TiO2纳米流体的导热性

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6748177

H. Jin, T. Andritsch, I. Tsekmes, R. Kochetov, P. Morshuis, J. Smit

引用次数: 10

The study of the effect in variation of A.C. applied voltage to the partial discharge localization inside transformer windings 交流外加电压变化对变压器绕组局部放电定位影响的研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6748266

M. S. A. Rahman, P. Rapisarda, P. Lewin

{"title":"The study of the effect in variation of A.C. applied voltage to the partial discharge localization inside transformer windings","authors":"M. S. A. Rahman, P. Rapisarda, P. Lewin","doi":"10.1109/CEIDP.2013.6748266","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748266","url":null,"abstract":"Ageing processes typically associated with the dielectric and insulation system occur inside high voltage plant. These unwanted processes may lead to generation of partial discharge (PD) activity and ultimately limit the operational life of the plant. The operational over stressing and defects introduced during manufacture also lead to the existence of PD activity and the source of this activity needs to be identified and remedied before further degradation processes cause catastrophic failure. Therefore, research into localization techniques of PD sources inside high voltage plant generally and particularly within transformer windings has become important in order to provide the asset health information that allows maintenance and replacement processes to be carried out effectively. Locating a PD source inside a transformer winding using on-line measurement data is vital in order to achieve these objectives. Methods have been proposed to achieve this and in this paper the distribution of PD signal energy in the time and frequency domains is used as a location tool. Analysis of experimental data reveals that this approach is independent of the applied voltage.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129685568","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

Silver corrosion in transformers 变压器中的银腐蚀

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-20 DOI: 10.1109/CEIDP.2013.6747074

A. Holt, M. Facciotti, P. Amaro, R. C. Brown, P. Lewin, J. Pilgrim, G. Wilson, P. Jarman

{"title":"Silver corrosion in transformers","authors":"A. Holt, M. Facciotti, P. Amaro, R. C. Brown, P. Lewin, J. Pilgrim, G. Wilson, P. Jarman","doi":"10.1109/CEIDP.2013.6747074","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747074","url":null,"abstract":"The impact of corrosive sulfur on high value assets such as transformers is widely reported and can be considered a global problem. A great deal of research and development is focused on the remediation of corrosive transformers and the mitigation of future corrosion. Regeneration of aged and or corrosive oil by filtration through bauxite clays is a common method for removal of polar molecules and many sulfurous compounds such as dibenzyl-disulfide (DBDS). This process is largely successful, although over the last several years, increased corrosion and even total failure of transformers has been linked with the reclamation process. In some cases, the corrosion associated with a recent reclamation is selective for silver rather than copper. By thoroughly understanding the chemistry occurring during aged oil reclamation, it will be possible to take appropriate measures to limit the formation of corrosive species during future reclamation and regeneration processes. There is a requirement to minimize the amount of oil wastage during reclamation for both environmental and commercial reasons. It is also important that any changes made to the reclamation process do not have a detrimental effect on the health and life-expectancy of the transformer. This paper describes studies carried out to track the total sulfur content of oil samples taken from two different locations (transformer main tank and reclamation rig buffer tank), at multiple time intervals during an oil reclamation procedure. By tracking the total sulfur content, it is possible to determine when and where maximum sulfur accumulation occurs, possibly indicating the best point at which a portion of oil should be disposed. Once a fuller understanding of the sulfur content is obtained, GC-MS will be used to gain a detailed understanding of the types of sulfurous species present in the oil.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122685544","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: 7