Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619766
M. Arnaout, T. Paulmier, B. Dirasen, L. Berquez, F. Baudoin, D. Payan
This paper deals with a new method of PEA signal processing used for space materials. The aim of this new approach of deconvolution technique is first to obtain a charge density with an optimized spatial resolution and second to have an estimated charge density without handle any parameters. This new method is compared with the current PEA signal processing widely developed in the literature. After a brief description of the both methods, an experimental comparison is realized with irradiated materials. Results show an enhancement of the spreading of charges at vicinity of electrodes.
{"title":"Description and experimental validation of a new PEA signal processing concept","authors":"M. Arnaout, T. Paulmier, B. Dirasen, L. Berquez, F. Baudoin, D. Payan","doi":"10.1109/ICSD.2013.6619766","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619766","url":null,"abstract":"This paper deals with a new method of PEA signal processing used for space materials. The aim of this new approach of deconvolution technique is first to obtain a charge density with an optimized spatial resolution and second to have an estimated charge density without handle any parameters. This new method is compared with the current PEA signal processing widely developed in the literature. After a brief description of the both methods, an experimental comparison is realized with irradiated materials. Results show an enhancement of the spreading of charges at vicinity of electrodes.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121784998","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619705
A. Beldjilali, M. Saidi, N. Saidi-Amroun
The aim of this work is to study, with a numerical simulation, the space charge dynamics in polymers, where a particular intent is accorded to the mobility parameter. Analysis of experimental transient charging current, with anomalous peak, under dc field, in polyethylene naphthalate, show that carriers mobility depends strongly on the temperature and weakly on applied field (probably due to its small range variation). The temperature dependence of the mobility follows an Arrhenius-like law, with apparent activation energy of 0.45 eV. From these experimental results, a model of space charge was considered, assuming Schottky injection at electrodes. Transient space-charge distributions, internal field profile and external charging current, were numerically simulated based on this model. It was shown that the space-charge dynamics depends upon the mobility of carriers.
{"title":"Simulation of space charge in polyethylene naphthalate: Effect of charge carrier mobility","authors":"A. Beldjilali, M. Saidi, N. Saidi-Amroun","doi":"10.1109/ICSD.2013.6619705","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619705","url":null,"abstract":"The aim of this work is to study, with a numerical simulation, the space charge dynamics in polymers, where a particular intent is accorded to the mobility parameter. Analysis of experimental transient charging current, with anomalous peak, under dc field, in polyethylene naphthalate, show that carriers mobility depends strongly on the temperature and weakly on applied field (probably due to its small range variation). The temperature dependence of the mobility follows an Arrhenius-like law, with apparent activation energy of 0.45 eV. From these experimental results, a model of space charge was considered, assuming Schottky injection at electrodes. Transient space-charge distributions, internal field profile and external charging current, were numerically simulated based on this model. It was shown that the space-charge dynamics depends upon the mobility of carriers.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115139549","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619750
A. Contin, G. Schena, D. Dreossi
The X-ray computed tomography has been applied here to inspect the internal features of two types of ground-wall insulation systems of ac rotating machines. Samples extracted from complete coils were scanned and their internal structure was analyzed by means of virtual slicing and 3D rendering procedures. Specialized software tools have been used to discover the morphological features of both the distributed voids and the high-density anomalies. It is was found that the resin penetration as well as the density and the geometries of the distributed microvoids depend from the tape characteristics.
{"title":"3D structural analysis of ground-wall insulation of AC rotating machines using X-ray tomography","authors":"A. Contin, G. Schena, D. Dreossi","doi":"10.1109/ICSD.2013.6619750","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619750","url":null,"abstract":"The X-ray computed tomography has been applied here to inspect the internal features of two types of ground-wall insulation systems of ac rotating machines. Samples extracted from complete coils were scanned and their internal structure was analyzed by means of virtual slicing and 3D rendering procedures. Specialized software tools have been used to discover the morphological features of both the distributed voids and the high-density anomalies. It is was found that the resin penetration as well as the density and the geometries of the distributed microvoids depend from the tape characteristics.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"103-B 7 Supple B 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115173701","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619762
Walid Boughamni, J. Manata, S. Ait-Amar, D. Roger
The aim of this paper is to compare electrical, mechanical and thermal characteristics of two self-bonding solutions to the impregnation one. An alternative solution is developed without Volatile Organic Compound (VOC). The study focuses on two parameters: the Partial Discharge Inception Voltage (PDIV) of turn-to-turn insulation and the thermal conductivity between the heart of the winding and the magnetic core. This study place the problem of electrical machines design in a broader context which includes the life cycle analysis, in order to go towards the eco-design of electrical machines able to reduce the global environmental footprint.
{"title":"Electrical machines insulation: Towards low environmental impact solutions","authors":"Walid Boughamni, J. Manata, S. Ait-Amar, D. Roger","doi":"10.1109/ICSD.2013.6619762","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619762","url":null,"abstract":"The aim of this paper is to compare electrical, mechanical and thermal characteristics of two self-bonding solutions to the impregnation one. An alternative solution is developed without Volatile Organic Compound (VOC). The study focuses on two parameters: the Partial Discharge Inception Voltage (PDIV) of turn-to-turn insulation and the thermal conductivity between the heart of the winding and the magnetic core. This study place the problem of electrical machines design in a broader context which includes the life cycle analysis, in order to go towards the eco-design of electrical machines able to reduce the global environmental footprint.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132700099","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619898
L. Zavattoni, O. Lesaint, O. Gallot-Lavallée, J. Reboud
The influence of water inside an insulating material (epoxy resin with Alumina filler) on volume resistivity, is investigated. This parameter is measured versus temperature. The water content within samples is adjusted using a climatic chamber, and monitored by weighing. Measurements show a large enhancement of volume conductivity versus water concentration and temperature. The impact of a temperature gradient, and of the presence of water on the field distribution and current through a high voltage insulator under HVDC is calculated. This is done by numerical simulation with simplified insulator geometry. The simulation includes the coupling between temperature distribution, resistivity versus temperature, and field distribution.
{"title":"Influence of water content and temperature on conduction and field on an Alumina/epoxy insulator","authors":"L. Zavattoni, O. Lesaint, O. Gallot-Lavallée, J. Reboud","doi":"10.1109/ICSD.2013.6619898","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619898","url":null,"abstract":"The influence of water inside an insulating material (epoxy resin with Alumina filler) on volume resistivity, is investigated. This parameter is measured versus temperature. The water content within samples is adjusted using a climatic chamber, and monitored by weighing. Measurements show a large enhancement of volume conductivity versus water concentration and temperature. The impact of a temperature gradient, and of the presence of water on the field distribution and current through a high voltage insulator under HVDC is calculated. This is done by numerical simulation with simplified insulator geometry. The simulation includes the coupling between temperature distribution, resistivity versus temperature, and field distribution.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133506408","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619678
A. Abdelmalik, J. Fothergill, S. Dodd
The aging behavior of transformer insulation Kraft paper aged in a natural ester oil, recently developed from palm kernel oil, is compared to the behavior of paper samples aged in mineral insulating oil. This study aimed to investigate the effect of the natural ester oil on the aging of cellulose insulation paper if used as an alternative insulating fluid in transformers. Thermally upgraded insulation paper was aged in both insulating fluids together with strips of galvanized steel, copper and aluminium to represent the transformer, under nitrogen pressure in a sealed mild steel pressure vessel for 150 degC for 28, 56, and 84 days. The degradation after aging was assessed using tensile strength and breakdown strength measurements of the paper. The paper samples impregnated with natural ester fluid exhibited similar behavior before and after aging, with an approximately 5% reduction in tensile strength after 28 days of ageing. Two sets of response were obtained for paper samples aged in mineral insulating oil under the same ageing conditions; the paper closer to the copper strips had a faster degradation rate (~35% reduction). The natural ester fluid retarded the aging of the Kraft paper. The characteristic breakdown strength of natural ester impregnated paper was found to be, on the average, 42% better than that of mineral oil impregnated paper.
{"title":"Aging of Kraft paper insulation in natural ester dielectric fluid","authors":"A. Abdelmalik, J. Fothergill, S. Dodd","doi":"10.1109/ICSD.2013.6619678","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619678","url":null,"abstract":"The aging behavior of transformer insulation Kraft paper aged in a natural ester oil, recently developed from palm kernel oil, is compared to the behavior of paper samples aged in mineral insulating oil. This study aimed to investigate the effect of the natural ester oil on the aging of cellulose insulation paper if used as an alternative insulating fluid in transformers. Thermally upgraded insulation paper was aged in both insulating fluids together with strips of galvanized steel, copper and aluminium to represent the transformer, under nitrogen pressure in a sealed mild steel pressure vessel for 150 degC for 28, 56, and 84 days. The degradation after aging was assessed using tensile strength and breakdown strength measurements of the paper. The paper samples impregnated with natural ester fluid exhibited similar behavior before and after aging, with an approximately 5% reduction in tensile strength after 28 days of ageing. Two sets of response were obtained for paper samples aged in mineral insulating oil under the same ageing conditions; the paper closer to the copper strips had a faster degradation rate (~35% reduction). The natural ester fluid retarded the aging of the Kraft paper. The characteristic breakdown strength of natural ester impregnated paper was found to be, on the average, 42% better than that of mineral oil impregnated paper.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115063056","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619879
N. Ichikawa
Electric shocks occur all over the world. The number of annual worldwide electrical fatalities may exceed 47,000 people and must be reduced. Electrical fatalities are caused by contact with a charged object. Contact with a 35 V charged object is fatal. Such accidents occur when an insulating safeguard is not used. An insulating safeguard is sometimes not used because an insulating safeguard for high voltage work is very heavy. A safeguard for preventing the shocks must be developed to eliminate fatalities. However, an easy-to-handle safeguard is not often developed because it does not need to be developed. We need to develop a safeguard that can be easily handled. In this study, we investigate the design of a safeguard capable of easy handling. The safeguard is studied based on results of measured AC breakdown voltage. In the experiments, we measure AC breakdown voltage for a single layer and a double layer of an EVA sheet and a PMMA plate. The insulating materials of the EVA sheet and the PMMA plate are used for a design of an insulating safeguard. The results show that experimental formulae can be used for the design of the safeguard. The results will be useful for the design of the safeguard used for AC charged objects, which consists of two insulating materials.
{"title":"Safety design of an insulating safeguard based on the AC breakdown voltage of EVA and PMMA — Insulating safeguard capable of preventing electric accidents","authors":"N. Ichikawa","doi":"10.1109/ICSD.2013.6619879","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619879","url":null,"abstract":"Electric shocks occur all over the world. The number of annual worldwide electrical fatalities may exceed 47,000 people and must be reduced. Electrical fatalities are caused by contact with a charged object. Contact with a 35 V charged object is fatal. Such accidents occur when an insulating safeguard is not used. An insulating safeguard is sometimes not used because an insulating safeguard for high voltage work is very heavy. A safeguard for preventing the shocks must be developed to eliminate fatalities. However, an easy-to-handle safeguard is not often developed because it does not need to be developed. We need to develop a safeguard that can be easily handled. In this study, we investigate the design of a safeguard capable of easy handling. The safeguard is studied based on results of measured AC breakdown voltage. In the experiments, we measure AC breakdown voltage for a single layer and a double layer of an EVA sheet and a PMMA plate. The insulating materials of the EVA sheet and the PMMA plate are used for a design of an insulating safeguard. The results show that experimental formulae can be used for the design of the safeguard. The results will be useful for the design of the safeguard used for AC charged objects, which consists of two insulating materials.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115605506","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619905
X. Qiu, W. Wirges, R. Gerhard, Heitor Cury Basso
Non-polar polymer foams can be rendered piezoelectric by internal charging of their cavities through a series of dielectric barrier discharges (DBDs). The cavities with their positive and negative charges are man-made macroscopic dipoles that function in analogy to the dipoles in ferroelectrics and that also constitute a macroscopic electric polarization. In ferroelectric materials, polarization-versus-electric-field (P(E)) hysteresis curves are observed. Here, P(E) hysteresis curves are obtained on cellular polypropylene ferroelectrets by means of voltage-voltage-mode measurements. The charge transferred during the internal DBD charging is determined from the voltage on a standard capacitor that is connected in series with the sample and that has a much larger capacitance than the sample. Another standard capacitor, with a capacitance much smaller than that of the former, but still substantially larger than that of the sample, is also connected in series and serves as a high-voltage divider that protects the electrometer in case of destructive breakdown in the sample. It will be shown how the DBDs inside the cellular foam lead to a phenomenological hysteresis curve that is the same as the hysteresis loops found in other ferroic materials.
{"title":"Are cellular polypropylene ferroelectrets ferroic?","authors":"X. Qiu, W. Wirges, R. Gerhard, Heitor Cury Basso","doi":"10.1109/ICSD.2013.6619905","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619905","url":null,"abstract":"Non-polar polymer foams can be rendered piezoelectric by internal charging of their cavities through a series of dielectric barrier discharges (DBDs). The cavities with their positive and negative charges are man-made macroscopic dipoles that function in analogy to the dipoles in ferroelectrics and that also constitute a macroscopic electric polarization. In ferroelectric materials, polarization-versus-electric-field (P(E)) hysteresis curves are observed. Here, P(E) hysteresis curves are obtained on cellular polypropylene ferroelectrets by means of voltage-voltage-mode measurements. The charge transferred during the internal DBD charging is determined from the voltage on a standard capacitor that is connected in series with the sample and that has a much larger capacitance than the sample. Another standard capacitor, with a capacitance much smaller than that of the former, but still substantially larger than that of the sample, is also connected in series and serves as a high-voltage divider that protects the electrometer in case of destructive breakdown in the sample. It will be shown how the DBDs inside the cellular foam lead to a phenomenological hysteresis curve that is the same as the hysteresis loops found in other ferroic materials.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114718987","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619863
J. Ardila-Rey, J. Martínez-Tarifa, M. Mejino, R. Albarracín, M. Rojas-Moreno, G. Robles
Electromagnetic radiation emissions from partial discharges (PD) can be measured, which could be helpful for avoiding unwanted asset disconnections in the power grid for insulation evaluation. These radio-frequency (RF) measurements do not require galvanic contact with high-voltage (HV) devices, which seems to be a clear advantage, but the lack of synchronization voltage makes PD source recognition a difficult task. Moreover, the presence of RF noise sources in the wideband required for PD detection, can lead to false warnings in the HV apparatus evaluation. In this paper, some specific parameters for signal characterization have been used in three-dimensional maps: signal energy, bandwidth and characteristic frequency. A digital acquisition system has been programmed to measure thousands of emissions from environmental noise and controlled PD sources in laboratory experiments. The aim of this paper is to state if this signal classification technique is reliable for PD and noise characterization in the RF range.
{"title":"Chromatic classification of RF signals for partial discharges and noise characterization","authors":"J. Ardila-Rey, J. Martínez-Tarifa, M. Mejino, R. Albarracín, M. Rojas-Moreno, G. Robles","doi":"10.1109/ICSD.2013.6619863","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619863","url":null,"abstract":"Electromagnetic radiation emissions from partial discharges (PD) can be measured, which could be helpful for avoiding unwanted asset disconnections in the power grid for insulation evaluation. These radio-frequency (RF) measurements do not require galvanic contact with high-voltage (HV) devices, which seems to be a clear advantage, but the lack of synchronization voltage makes PD source recognition a difficult task. Moreover, the presence of RF noise sources in the wideband required for PD detection, can lead to false warnings in the HV apparatus evaluation. In this paper, some specific parameters for signal characterization have been used in three-dimensional maps: signal energy, bandwidth and characteristic frequency. A digital acquisition system has been programmed to measure thousands of emissions from environmental noise and controlled PD sources in laboratory experiments. The aim of this paper is to state if this signal classification technique is reliable for PD and noise characterization in the RF range.","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117122838","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}
Pub Date : 2013-10-08DOI: 10.1109/ICSD.2013.6619843
M. H. Ahmad, M. Piah, Y. Arief, N. Bashir, N. Chalashkanov, S. Dodd
This paper describes a set of experiments to assess temperature dependence on phase-resolved partial discharge activity during electrical tree growth in a room temperature vulcanized silicone rubber/organo-Montmorillonite (oMMT) nanocomposite material. The filler particles were prepared by treating MMT with alkylammonium before dispersing in the silicone rubber to form the silicone/organo-Montmorillonite nanocomposite. The samples were prepared with three levels of nanofiller content, 0% by wt, 1% by wt and 3% by wt in order to assess the effect of different filler concentrations on the treeing process and the corresponding PD activity under an applied 50Hz AC electrical stress. The results demonstrate that the introduction of 1% by wt of nano-filler increases the tree inception times and decreases the rate of tree growth. It was also found that the PD characteristics, particularly the mean phase angle of occurrence of the positive and negative discharge distributions, became insensitive to variations in temperature. This reflects an enhanced stability in the nanocomposite electrical properties compared with the base polymer. Tree initiation and growth were found to be suppressed in the case of the 3% by wt nanocomposite to the extent that tree growth did not occur over the duration of the test (4 hours).
本文描述了一组实验，以评估室温硫化硅橡胶/有机蒙脱土(oMMT)纳米复合材料在电树生长过程中相分解局部放电活性的温度依赖性。用烷基铵处理蒙脱土制备填充颗粒，然后分散到硅橡胶中，形成有机硅/有机蒙脱土纳米复合材料。为了评估在施加50Hz交流电应力下，不同浓度的纳米填料对树形过程和相应PD活性的影响，制备了三种纳米填料含量水平的样品，分别为0% wt、1% wt和3% wt。结果表明，添加重量为1%的纳米填料增加了树的起始次数，降低了树的生长速度。研究还发现，放电特性，特别是正负放电分布的平均相位角，对温度的变化不敏感。这反映了与基聚合物相比，纳米复合材料电学性能的稳定性增强。研究发现，在3% by wt纳米复合材料的情况下，树木的起始和生长受到抑制，以至于在测试持续时间(4小时)内树木没有生长。
{"title":"Temperature dependance of PD from electrical trees grown in silicone rubber based nanocomposites","authors":"M. H. Ahmad, M. Piah, Y. Arief, N. Bashir, N. Chalashkanov, S. Dodd","doi":"10.1109/ICSD.2013.6619843","DOIUrl":"https://doi.org/10.1109/ICSD.2013.6619843","url":null,"abstract":"This paper describes a set of experiments to assess temperature dependence on phase-resolved partial discharge activity during electrical tree growth in a room temperature vulcanized silicone rubber/organo-Montmorillonite (oMMT) nanocomposite material. The filler particles were prepared by treating MMT with alkylammonium before dispersing in the silicone rubber to form the silicone/organo-Montmorillonite nanocomposite. The samples were prepared with three levels of nanofiller content, 0% by wt, 1% by wt and 3% by wt in order to assess the effect of different filler concentrations on the treeing process and the corresponding PD activity under an applied 50Hz AC electrical stress. The results demonstrate that the introduction of 1% by wt of nano-filler increases the tree inception times and decreases the rate of tree growth. It was also found that the PD characteristics, particularly the mean phase angle of occurrence of the positive and negative discharge distributions, became insensitive to variations in temperature. This reflects an enhanced stability in the nanocomposite electrical properties compared with the base polymer. Tree initiation and growth were found to be suppressed in the case of the 3% by wt nanocomposite to the extent that tree growth did not occur over the duration of the test (4 hours).","PeriodicalId":437475,"journal":{"name":"2013 IEEE International Conference on Solid Dielectrics (ICSD)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115243202","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}
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