2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献

{"title":"Polyethylene-based composites containing octaisobutyl polyhedral oligomeric silsesquioxanes obtained by extrusion","authors":"M. Guo, N. Demarquette, É. David, M. Frechette","doi":"10.1109/CEIDP.2015.7352111","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352111","url":null,"abstract":"Melt blending with a twin-screw extruder was tested as a method for producing polyethylene (PE)-based nanodielectrics containing octaisobutyl polyhedral oligomeric silsesquioxanes (OibPOSS). An extrusion temperature profile with comparatively low barrel zone temperatures (110 °C-130 °C) was employed and two rotation speeds (50 and 200 rpm) were investigated in order to achieve PE/OibPOSS nanodielectrics bearing homogeneous OibPOSS dispersion and improved dielectric properties. The resulting composites were characterized using Fourier transform infrared spectroscopy, thermogravimetric analysis, laser scanning confocal microscope, progressive-stress breakdown tests and broadband dielectric spectroscopy. The results showed that the rotation speed employed in the extrusion process had some effects on the dispersion of OibPOSS. However, it had little influence on the properties of the resulting composites. For composites extruded at both 50 rpm and 200 rpm, the ones containing 1 wt% OibPOSS presented dielectric properties similar to those of LDPE, whereas the ones containing 5 wt% OibPOSS presented dielectric properties inferior to those of LDPE.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"96 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127991622","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}

{"title":"The equivalent dissolved salt deposit density of contamination on surface of silicone rubber","authors":"Bin Cao, H. Mei, Liming Wang, Xiangyun Fu, Zhifu Zhang, He Gao, Xiangjun Lin","doi":"10.1109/CEIDP.2015.7352051","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352051","url":null,"abstract":"The equivalent salt deposit density (ESDD) is one of the appropriate parameters to describe the level of contamination on the surface of insulator. Because of the unique properties of silicone rubber, some contamination on the surface of silicone rubber is difficult to be dissolved, which is not related to the pollution flashover. This paper proposes the equivalent dissolved salt deposit density (EDSDD) to describe the level of the contamination of the silicone rubber composite insulator. The EDSDD represents the quality of contamination which is dissolved in wetting process on the surface of silicone rubber and The EDSDD is related to the ESDD and the hydrophobicity of silicone rubber. The EDSDD can be arrived from the ESDD and the hydrophobicity of the silicone rubber and a special instrument is designed for measuring the ESDD of silicone rubber at the outdoor. A series of experimental results show that only part of contamination is dissolved in the wetting process and the quantity of contamination dissolved is related to the hydrophobicity of silicone rubber. Only 1/5 contamination is dissolved during the wetting process if the contact angle of the silicone rubber reaches 120 degrees. The dissolution rate of contamination on the surface of silicone rubber is very fast, so the ESDD can be measured by the special instrument quickly.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114361422","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}

{"title":"A first step towards predicting the life of HVDC cables subjected to load cycles and voltage polarity reversal","authors":"G. Mazzanti, M. Marzinotto, A. Battaglia","doi":"10.1109/CEIDP.2015.7352118","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352118","url":null,"abstract":"This paper is a first step towards the evaluation of the life and reliability of HVDC cable systems in the presence of voltage polarity reversals. It combines a physical-phenomenological life model for HVDC cables subjected to voltage polarity with a recently-developed life model for HVDC cables subjected to load cycles. Under some meaningful approximations, a quite powerful model that accounts both for load cycles and voltage polarity reversal is eventually attained. Such model can be applied in order to predict the life of HVDC cables subjected to voltage polarity reversal tests with load cycles superimposed, performed in line with CIGRÉ Recommendations after Electra 189, 2000. By doing so, results in agreement with the experience gained by Terna (the Italian TSO) in testing HVDC cables - in particular MIND cables - are attained.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"168 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116873108","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}

{"title":"Further study on dielectric properties of solid epoxy composites with Graphene Oxide","authors":"M. Frechette, C. Vanga-Bouanga, É. David, Jean-Christophe Daigle","doi":"10.1109/CEIDP.2015.7352151","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352151","url":null,"abstract":"Knowledge has been pushed further regarding an epoxy composite containing Graphene-Oxide (GO) doped epoxy powder. It was put forward that GO could behave as a curing agent. This would explain the breakdown characteristics of the composites. In spite of being a nanostructured microcomposite, the samples breakdown can be favourably compared to that of neat epoxy. The presence of GO opens the door to tailoring the real permittivity and electrical conductivity, but enlarges somewhat the losses.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129928160","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}

{"title":"Dielectric properties of thermoplastic elastomer/zinc oxide (ZnO) nanocomposites with controlled nanoparticles dispersion","authors":"E. Helal, N. Demarquette, É. David, M. Frechette","doi":"10.1109/CEIDP.2015.7352144","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352144","url":null,"abstract":"In this study, the rheological and dielectric properties of two sets of nanocomposites prepared respectively from Styrene-Ethylene-Butylene-Styrene (SEBS) and SEBS grafted maleic anhydride (SEBS-g-MA) block copolymer matrices and surface functionalized zinc oxide nanoparticles have been investigated. The interaction at the polymer-nanoparticle interface was tuned through the MA graft in order to tailor the nanoparticles dispersion in the block copolymer nanostructure and to highlight its effect on the dielectric performance. Small Amplitude Oscillatory Shear (SAOS) measurements revealed highly improved solid-like behavior and a low frequency independent storage modulus in SEBS-g-MA based nanocomposite which indicates good dispersion and formation of a network between the nanoparticles and the polymer chains. This result was supported by a reduction in the adsorbed carbonyl peak in Fourier Transformed Infrared (FTIR) spectra attributed to an interaction between MA graft and the functional groups on the surface of ZnO nanoparticles. The dielectric spectroscopy revealed a limited increase of both real and imaginary parts of the dielectric permittivity and absence of interfacial relaxation peak, in the case of SEBS-MAZnO nanocomposite. Besides, the AC short term breakdown strength was slightly improved in the SEBS-MA-ZnO nanocomposite compared to the pure matrix while it decreased by 18% in SEBS-ZnO nanocomposite due to the presence of agglomerations.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121262040","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}

{"title":"Corona discharges aging of recycled PET filled with inorganic reinforcements","authors":"F. Mebarki, É. David","doi":"10.1109/CEIDP.2015.7352134","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352134","url":null,"abstract":"Polyethylene Terephthalate (PET) is one of the most promising candidate thermoplastics that can replace epoxy resin as insulating material for electric and electronic applications, thanks to its good processability and excellent properties which remain relatively stable in a large range of temperatures. In this paper, two different micrometric fillers, short glass fibers as well as small and large mica platelets have been used to form composites. One of the possible applications is the mechanical support for the HV terminal system of internal combustion engines. In order to evaluate the dielectric endurance of these materials, corona resistance tests were performed in an oven using a point-to-plane configuration in air at several constant temperatures between the room temperature and 170°C. Tests were carried out at 7 kV rms and at a frequency of 300 Hz to accelerate the degradation process. In order to check the effect of time, experiments were also conducted at different times between 24 and 96 hours. The dielectric strength has been evaluated at room temperature before and after erosion according to the ASTM-D149 standard. The dielectric response was evaluated using a broadband dielectric spectroscopy (BDS) at room temperature before and after erosion. Dielectric breakdown strength data obtained before exposure to corona discharges shows that there is a slight difference between the composites filled with large mica platelets and those reinforced with small mica platelets. However, the data obtained after erosion revealed that recycled PET filled with large mica platelets perform better than those filled with small mica platelets. In addition, it was found that an increase of temperature induces a decrease of the residual breakdown voltage. Results demonstrated that the recycled PET based composites reinforced with large mica platelets has good resistance to corona discharges at elevated temperature as compared to small mica platelets filled recycled PET. Data obtained by BDS show a slight increase in relative permittivity for recycled PET filled with large mica platelets as compared to the recycled PET reinforced with large mica platelets. It was also found that an increase of temperature or time results in an increase of dielectric losses mainly at low frequencies. It can be concluded that BDS and dielectric breakdown strength after erosion process were useful to distinct the performance of composites filled with small and large mica platelets, which was not possible with only short term dielectric breakdown measurements.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122244506","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}

{"title":"Study on the dielectric characteristics of simulation transmission line gap under fire conditions","authors":"Peng Li, Daochun Huang, J. Ruan, Han Wei, Zhihang Qin, Zhibin Qiu, Xiaoming Chen","doi":"10.1109/CEIDP.2015.7352040","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352040","url":null,"abstract":"The frequent forest fires become a serious threat to the performance of transmission lines' external insulation. Hence, the AC/DC breakdown characteristics study of the simulation transmission line gap in the flame conditions has an important meanning for the transmission lines' construction and safety operation. Gap breakdown in forest fire relates to many factors, such as flame temperature, conductivity and particles. Different vegetation's combustion characteristics determine that the discharge characteristics of the gap under the fire conditions are different. In order to research the breakdown characteristics of transmission lines gap under the vegetation flames (fir, straw and reed), the AC and DC breakdown characteristics tests were performed in a simulation test platform. Experimental results show that, the gap's insulation strength in the flames decreases significantly. As the gap is full bridged by the flame, the order of gap breakdown voltage under different vegetation is: fir branch<;straw<;reed<;fir trunk. Under the fir branch fire, the AC breakdown voltage of gap is reduced to about 10% of that in the air gap, and which is reduced to about 20% under the fir trunk. Gap breakdown has an evident effect of polarity characteristic under DC voltage, and the breakdown voltage of positive polarity is smaller than that of negative polarity. When the conductor-plate gap is enveloped by the flame, the breakdown voltage has a linear changed trend with the gap distance under the vegetation flames. The AC breakdown voltage is slight lower than that of DC positive polarity voltage under the same test conditions.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116470675","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}

{"title":"Molecular indications of structure property relationships in enhanced nanocomposites","authors":"N. Freebody, G. Stevens, H. Herman, A. Vaughan, A. Hyde, F. Perrot","doi":"10.1109/CEIDP.2015.7352160","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352160","url":null,"abstract":"To obtain good dispersion of nanofillers in nanodielectrics, the surface of nanopowders or colloidal particles can be chemically treated to make them more compatible with the matrix. Epoxy nanocomposites that contain surface functionalized nanosilica, either colloidal or powdered, show higher breakdown strengths than the reference epoxy material. For nanodielectric composites containing 2 wt % of nanosilica, a breakdown strength some 25% higher than that of the unfilled epoxy was obtained. Spectroscopic measurements were obtained from all samples and multi variate statistical analysis was applied to enable selected material properties to be regressed allowing molecular associations of these properties to be identified. Electrical breakdown strength was found to be related to the presence of silica and the degree of curing whereas space charge accumulation was found to be related to a reduction in polar ester formation. In contrast we find clear evidence of space charge accumulation being related to more shallow charge trapping centers.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126812693","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}

{"title":"Tracking and surface degradation of barium titanate filled silicone rubber nanocomposites","authors":"Rakesh Kumar, N. Gupta","doi":"10.1109/CEIDP.2015.7352062","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352062","url":null,"abstract":"Silicone rubber (SR) based composite insulators are being increasingly used in HV transmission lines because of their superior performance in polluted environments. The surface hydrophobicity of SR based insulators makes them ideal for use as outdoor insulation especially in polluted environments. Research in nanodielectrics in the last decade has shown that addition of nanosized fillers into bulk polymers often improve their electrical and non-electrical properties significantly. In this work, we study the effect of incorporating barium titanate nanofillers into room temperature vulcanized silicone rubber (RTVSR). Nano-sized barium titanate (BaTiO3) particles are used as fillers in the RTVSR matrix with volume fractions of 0.5%, 1%, and 2%. While preparing samples, mechanical mixing and ultrasonic mixing are used for reducing the agglomeration of nano fillers. Barium titanate fillers are expected to increase the permittivity of the composite, thus helping in electric field stress control. One of the most important issues in outdoor insulation is tracking. Tracking on the surface of the insulator leads to degradation, and even complete failure of the insulator. In this work, we study the effect of incorporation of nano-fillers on propensity of RTVSR to tracking and associated degradation. Inclined Plane Test (IPT) for erosion as per the IEC60587 is performed. Additionally, surface degradation tests are performed to estimate how the addition of nano fillers increases the resistance to degradation due to surface discharges. It is seen that SR filled with nanosized barium titanate fillers show better resistance to tracking as well as surface degradation.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132660795","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}

{"title":"Development of thermal conductive PMMA/BN electric insulating composite material using electrostatic adsorption method","authors":"Y. Murakami, A. Fujii, Tomohiro Kawshima, M. Nagao","doi":"10.1109/CEIDP.2015.7352005","DOIUrl":"https://doi.org/10.1109/CEIDP.2015.7352005","url":null,"abstract":"An electrostatic adsorption method can produce composite materials with an arbitrary structure by changing the ratio of the main particles to the adsorption particles. To develop a composite material with both a higher thermal conductivity and an acceptable breakdown strength (Fb: Field of Breakdown), the DC breakdown test and thermal conductivity test of polymethylmethacrylate (PMMA)/boron nitride (BN) composite material were performed. The Fb of the samples increased regardless of the type of BN filler as the pressure increased. The higher bonding force among the composite particles due to a high pressure leads to a higher Fb. The higher orientation probability of the longer direction of BN, which is perpendicular to the field (press) direction, might induce the higher Fb in the high-pressure sample. The thermal conductivity of the sample with a mixture of the agglomerate of the platelet BN and the platelet BN was higher than those of the other BN samples. The longer directions of the platelet BN and the agglomerate of the platelet BN were oriented perpendicular to the thickness direction. These results suggested that the reasonable strength and higher thermal conductivity were due to the orientation of the agglomerate of the platelet BN and the platelet BN mixture by the press.","PeriodicalId":432404,"journal":{"name":"2015 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123023021","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}