2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第10页

Influence of semi-crystalline morphology on the electrical breakdown properties of sPP based materials 半晶形态对sPP基材料电击穿性能的影响

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232766

F. Guastavino, A. S. Thelakkadan, A. Dardano, G. Coletti, J. Gómez-Elvira, P. Tiemblo

引用次数: 2

Gas generation characteristics of transformer oil under combined AC-DC voltages in the process of arcing 交直流复合电压下变压器油电弧过程的产气特性

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232757

Y. Zhou, Y. Sha, X. X. Jiang, Q. Sun, Y. S. Wang, J. Tian

{"title":"Gas generation characteristics of transformer oil under combined AC-DC voltages in the process of arcing","authors":"Y. Zhou, Y. Sha, X. X. Jiang, Q. Sun, Y. S. Wang, J. Tian","doi":"10.1109/CEIDP.2011.6232757","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232757","url":null,"abstract":"As an important equipment, convertor transformer plays a crucial role in ultra high voltage direct current (UHVDC). How to improve the safety running level of convertor transformers is a key problem to be solved imminently. Compared with AC power transformers, the valve side windings of convertor transformers will endure combined AC-DC voltage. In these conditions, the gas generation characteristics in oil for convertor transformers will be more complicated. In this paper, according to the operational principle of convertor transformers, the ratios between AC and DC voltage on valve side windings in the star connection and triangular connection were 77.1% and 83.7% respectively. Based on the above results, 65 kV peak voltages in 5 different AC and DC voltage forms were applied to the needle-plate electrode model for 2 hours. The discharge current and voltage waveforms were recorded and the arc current pulses had a short lasting time about 1.2 ms. Then the mean discharge energy was calculated at 0.1 to 0.3 J. At the same time, the gas generation characteristics under combined AC-DC voltage were obtained by using the gas chromatographic analysis method. The variations of amounts and generation rates of characteristic gases were measured with time during 2 hours, which provided fault judgment criterions and experimental experience. The experimental results showed that the amounts and generation rates of H2, C2H2 and total hydrocarbon under the pure DC voltage or combined AC-DC voltage were more than those under the pure AC voltage. It might illustrate the fact that effects of different voltage forms would lead to different gas generation characteristics could not be ignored.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"38 1","pages":"718-721"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82579897","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: 5

Evaluation of thermal conductive resistance at organic-inorganic interface and development of thermal conductive insulation materials for electric devices 有机-无机界面导热电阻的评价与电气器件导热绝缘材料的研制

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232663

K. Fukushima, Y. Takezawa, T. Adschiri

{"title":"Evaluation of thermal conductive resistance at organic-inorganic interface and development of thermal conductive insulation materials for electric devices","authors":"K. Fukushima, Y. Takezawa, T. Adschiri","doi":"10.1109/CEIDP.2011.6232663","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232663","url":null,"abstract":"The effect of organic-inorganic interfaces on thermal conductivity of composite materials has been studied by evaluating thermal conductive resistance at the organic-inorganic interfaces experimentally. Polymer layer was sandwiched with thin ceramic plates to make multi-layer stacked samples. Through the comparison of the thermal conductivity of the multi-layer-stacked materials, and those of the single component materials for both polymer and ceramics, the thermal resistance at the interface between polymer and ceramic plate was evaluated. This suggests that the contribution of thermal-resistance become significant for composite materials because of the increase of interface. The results also demonstrate that the organic modifications of inorganic surface could effectively reduce the interfacial thermal resistance. Control of the interfaces seems to be effective to improve thermal conducting property of materials. On the other hand, control of inner structures in the materials is also important. We also investigated effects of inner structures on both thermal conducting and electrical insulating properties of the materials. Based on the results, high thermal conductive insulating materials were newly designed.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"26 1","pages":"330-333"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83251067","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

The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures 以氧化铝和氧化镁为填料的环氧基纳米复合材料在极低温下的复介电常数

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232657

T. Andritsch, R. Kochetov, P.H.F. Morshuis, J. J. Smit

{"title":"The complex permittivity of epoxy based nanocomposites with alumina and magnesium oxide fillers at very low temperatures","authors":"T. Andritsch, R. Kochetov, P.H.F. Morshuis, J. J. Smit","doi":"10.1109/CEIDP.2011.6232657","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232657","url":null,"abstract":"Delivery of energy in areas with a large population density and little space for high voltage equipment is an issue for utility companies in metropolises. Gas insulated switchgear is an alternative to conventional cable systems, enabling higher energy densities. However, the sulfur hexafluoride used in GIS causes environmental problems, which may not be acceptable anymore in a society with emphasis on sustainability. An alternative to this are superconducting cables. High temperature superconducting cables operate at temperatures close to the boiling point of nitrogen, which is 77 K. Not much is known about the dielectric behavior of insulating polymers at such temperatures. This exploratory work investigates how the complex permittivity of epoxy based nanocomposites changes at very low temperatures. A broadband dielectric spectrometer was utilized to acquire the real and imaginary part of the complex permittivity, along with the loss factor. The base polymer for all samples is a commercially available bisphenol-A epoxy with anhydrite hardener. As filler material magnesium oxide powder was used with an average particle size of 22 nm and alumina filler with 50 nm average diameter. Both particle types were modified with a silane coupling agent, in order to achieve a uniform dispersion of particles in the host material. Neat epoxy samples were used as a reference.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"306-309"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83007037","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

Arc discharge on contaminated ice surface 污染冰面上的电弧放电

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232671

Huafeng Su, Z. Jia, Zhining Li, Z. Guan, Licheng Li

引用次数: 0

A new calibration concept of the Pulsed Electro Acoustic method allowing to improve charge density measurement 一个新的校准概念的脉冲电声方法允许改进电荷密度测量

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232643

M. Arnaout, F. Baudoin, L. Berquez, D. Payan

引用次数: 3

Influence of H2O molecules on electrical tree initiation in silicone rubber 水分子对硅橡胶中电树起始的影响

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232773

S. Muroga, Y. Muramoto, N. Shimizu

{"title":"Influence of H2O molecules on electrical tree initiation in silicone rubber","authors":"S. Muroga, Y. Muramoto, N. Shimizu","doi":"10.1109/CEIDP.2011.6232773","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232773","url":null,"abstract":"Silicone rubber (SiR) has various excellent characteristics, and is widely used in various apparatus as insulating material. However, tree initiation processes and degradation phenomena in SiR are not clear. The investigations of tree initiation processes at high electric field region are very important. In this paper, the effect of H2O on electrical tree initiation voltage will be examined. Three kinds of samples were tested; untreated SiR, SiR treated by vacuum heating, and SiR impregnated with liquid water after vacuum heating treatment. The tree initiation voltage of SiR treated by vacuum heating was higher than that of untreated SiR. It is considered that the tree initiation voltage is increased by removing gaseous H2O molecules. However the tree initiation voltage of SiR impregnated with liquid water after vacuum heating was higher than that of SiR treated by vacuum heating. These results seem to contradict each other. We consider that the tree initiation voltage is increased by presence of liquid H2O. It is suggested that the states of H2O molecules included in the free volume have a large effect on ac tree initiation in SiR.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"25 1","pages":"784-787"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72806542","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

Dielectric breakdown mechanism of polypropylene laminated paper in liquid nitrogen 聚丙烯层压纸在液氮中的介电击穿机理

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232684

M. Nagao, M. Kurimoto, R. Takahashi, T. Kawashima, Y. Murakami, T. Nishimura, Y. Ashibe, T. Masuda

{"title":"Dielectric breakdown mechanism of polypropylene laminated paper in liquid nitrogen","authors":"M. Nagao, M. Kurimoto, R. Takahashi, T. Kawashima, Y. Murakami, T. Nishimura, Y. Ashibe, T. Masuda","doi":"10.1109/CEIDP.2011.6232684","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232684","url":null,"abstract":"Breakdown characteristics of PPLP (Polypropylene laminated paper) impregnated with LN2 for its application to high-temperature superconducting cable are presented. In this paper, we investigated the breakdown characteristics of PPLP, which was the three-laminated structure of kraft paper (KP), polypropylene film (PP film) and KP, in LN2 by comparison with those of the papers with different laminated structure, e.g., single-layer of KP, single-layer of PP film and the 2 layer laminated paper of KP and PP. The breakdown characteristics under the application of impulse voltage, ac voltage and dc voltage were obtained, and the breakdown mechanisms were discussed. Experimental results revealed that the breakdown strength of PPLP under the application of impulse voltage and dc voltage was higher than that of the single-layer material. This could be attributed to the dispersion effect of the streamer by KP layer of PPLP. In order to obtain the unified explanation for the breakdown mechanism with the different voltage polarity and the different laminated structure, we suggested the injection model of the negative charge into the KP layer of PPLP and the less-injection model of the charge into the PP.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"30 1","pages":"419-422"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82490969","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: 16

Three-dimensional electric field calculation and measurements inside high voltage substations 高压变电站内三维电场计算与测量

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232636

S. A. Word, S. Ghania, E. Shaalan

引用次数: 3

Dielectric study of a cyclo-aliphatic UV-curable epoxy resin copolymerized with a low glass transition co-monomer bearing methylene units 含亚甲基低玻璃化过渡共聚物的环脂肪族紫外光固化环氧树脂的介电性能研究

2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2011-10-01 DOI: 10.1109/CEIDP.2011.6232742

C. V. Bouanga, H. Couderc, G. Malucelli, M. Frechette, G. Camino, S. Savoie, J. Castellon, L. Banet

{"title":"Dielectric study of a cyclo-aliphatic UV-curable epoxy resin copolymerized with a low glass transition co-monomer bearing methylene units","authors":"C. V. Bouanga, H. Couderc, G. Malucelli, M. Frechette, G. Camino, S. Savoie, J. Castellon, L. Banet","doi":"10.1109/CEIDP.2011.6232742","DOIUrl":"https://doi.org/10.1109/CEIDP.2011.6232742","url":null,"abstract":"This work focuses on dielectric properties of a polymer constituted of epoxy resin and a very low glass transition temperature polymer. To this aim, a cycloaliphatic diepoxy monomer, namely 3, 4 - epoxycyclohexylmethyl-3', 4' - epoxy-cyclohexane carboxylate (CE), was copolymerized with 1,6-hexanediol diglycidyl ether (HDGE) by UV-curing employing different CE amounts (up to 40 wt. %). Two relaxation modes namely β and γ were observed, attributed to the local molecular motions. It has been shown that the dielectric constant and the thermal properties depend on the concentration of the CE. Their structural morphology and the effect of space charge were studied using the Thermal Step Method. The dielectric responses for UV-cured HDGE/CE systems are presented. The potential effect of moisture and/or ions, the effect of the formation of a polymer network having a tunable crosslinking density and the effect of space charge on the copolymers were also investigated. The influence of chain lengths on dielectric behaviour has also been investigated.","PeriodicalId":6317,"journal":{"name":"2011 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"39 1","pages":"655-659"},"PeriodicalIF":0.0,"publicationDate":"2011-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74949130","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: 5