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2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)最新文献

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The measurement and temperature profile of cable insulation failure due to loose connection at the cable termination 电缆端部因连接松动导致电缆绝缘失效的测量及温度分布
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664531
Z. Zarim, A. Ghani, S. Tiong
{"title":"The measurement and temperature profile of cable insulation failure due to loose connection at the cable termination","authors":"Z. Zarim, A. Ghani, S. Tiong","doi":"10.1109/ISEIM.2008.4664531","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664531","url":null,"abstract":"One of the dominant factors of cable termination fault in medium voltage circuit breaker compartment is due to excessive heating phenomenon. The excessive high temperature area will lead to degradation of the cable insulation. This eventually will lead to insulation failure and hence cable breakdown. The insulation failure may subsequently and causes fire in the cable compartment. A series of experiments were setup to measure the temperature profiles around the terminations and outside the cable termination compartment, with different scenarios. The results from the experiment will give a big contribution in future development of detection system of the fault termination in circuit breaker compartment.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121318563","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: 13
Detection of ion migration in composites for printed circuit boards by the pulsed electroacoustic method 用脉冲电声方法检测印刷电路板复合材料中的离子迁移
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664459
M. Natsui, Y. Echigo, T. Tanaka, Y. Ohki, T. Maeno
{"title":"Detection of ion migration in composites for printed circuit boards by the pulsed electroacoustic method","authors":"M. Natsui, Y. Echigo, T. Tanaka, Y. Ohki, T. Maeno","doi":"10.1109/ISEIM.2008.4664459","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664459","url":null,"abstract":"Pulsed electroacoustic (PEA) method is applied as a nondestructive technique to detect ion migration that progresses to the thickness direction in insulation composites for printed circuit boards. In both cases of a paper/phenol-resin composite and a glass/epoxy-resin composite, penetration of Cu migration into the bulk after aging was confirmed. Namely, a shift of the peak location of positive charge, which corresponds to the progress of migration in the aged composite, is observable by the PEA method.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"27 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116394311","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: 6
Fundamental study on relaxation processes of water tree in aged power cables aimed for diagnosis with spatial resolution 针对空间分辨率诊断的老化电缆水树松弛过程的基础研究
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664594
S. Hiei, N. Hozumi, T. Kurihara, T. Okamoto, K. Uchida
{"title":"Fundamental study on relaxation processes of water tree in aged power cables aimed for diagnosis with spatial resolution","authors":"S. Hiei, N. Hozumi, T. Kurihara, T. Okamoto, K. Uchida","doi":"10.1109/ISEIM.2008.4664594","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664594","url":null,"abstract":"Water tree is a degradation mode of power cable with polymeric insulation. A water tree is composed of small droplets filled with water. As the conductivity in water tree is very high, it leads to dielectric breakdown when it grows up. As inside the water tree is filled with trap sites, it is polarized with a certain distribution of relaxation time when a DC poling voltage is applied. Although its depolarization process after removing the poling voltage is determined by ambient temperature, applying a ldquodepolarizing voltagerdquo with the opposite polarity can accelerate the process. If a short pulse propagating through the cable is employed as a depolarization voltage, we may locate the water tree by looking at the time-resolved pulse response. This would lead to a diagnosing method with spatial resolution. In order to retain 100 m of spatial resolution, the response should be as sharp as 1 mus. As a preliminary study, a coaxial communication cable was aged to form water trees. A DC poling voltage was applied followed by a pulse voltage with opposite polarity. The rising time of the pulse was several hundreds of microseconds. A sharp pulsive current response with 50 mus in width was observed, suggesting that a rapid depolarization took place. No such response was seen when the cable specimen was not aged. We concluded that the technique is quite feasible.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116432810","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
A study on internal temperature monitoring system for power transformer using pptical fiber Bragg grating sensors 使用垂直光纤布拉格光栅传感器的电力变压器内部温度监测系统研究
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664443
Myonghwan Kim, June-Ho Lee, J. Koo, Minho Song
{"title":"A study on internal temperature monitoring system for power transformer using pptical fiber Bragg grating sensors","authors":"Myonghwan Kim, June-Ho Lee, J. Koo, Minho Song","doi":"10.1109/ISEIM.2008.4664443","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664443","url":null,"abstract":"A precise information on spatial distributions of temperature are important for diagnosing power transformers and evaluating its life because a power system failure will result in an enormous loss in tangible as well as social. The optical fiber Bragg grating (FBG) sensors, which have been studied intensively for last decade, can be very efficient tools for applications to above mentioned purpose because these are immune to EMI and can be highly multiplexed, which enables efficient quasi-distributed temperature sensing along tens of km range. We proposed a fiber-optic temperature monitoring system with an array of over 4 sensor gratings. The temperature-induced Bragg wavelength variations are accurately monitored by a scanned tunable wavelength filter. Differential measurement with temperature-stabilized reference gratings and a Gaussian curve-fitting algorithm has been used to enhance measurement accuracy, which obtained temperature resolution of ~0.6degC, and linearity error less than 0.4 %.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126612664","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: 14
Electrical conductivity of polyethylene aluminum nanocomposites with different particle surface chemistry characteristics 不同颗粒表面化学特性聚乙烯铝纳米复合材料的电导率
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664492
Xingyi Huang, Chonung Kim, P. Jiang, Fei Liu, Zhe Li, Y. Yin
{"title":"Electrical conductivity of polyethylene aluminum nanocomposites with different particle surface chemistry characteristics","authors":"Xingyi Huang, Chonung Kim, P. Jiang, Fei Liu, Zhe Li, Y. Yin","doi":"10.1109/ISEIM.2008.4664492","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664492","url":null,"abstract":"We investigated the influence of the surface modification of Al nanoparticles on the electrical conduction of polyethylene composites. Octyl-trimethoxysilane was used as a coupling agent for the treatment of Al nanoparticle. It was found that the incorporation of octyl groups onto the surface of Al nanoparticle altered the time dependence behaviors of polarization and depolarization current and increased the percolation threshold and the resistivity of the polyethylene composites. It is concluded that, based on our morphology observation of the nanocomposites, the improved electrical properties could be directly ascribed to the good dispersion and special electrical feature of the surface-treated nanoparticles in the polymer matrix.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126723415","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
Trapping centers engineering by including of nanoparticles into organic semiconductors 通过将纳米颗粒加入有机半导体中来实现捕集
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1063/1.3033403
M. Weis, T. Manaka, M. Iwamoto
{"title":"Trapping centers engineering by including of nanoparticles into organic semiconductors","authors":"M. Weis, T. Manaka, M. Iwamoto","doi":"10.1063/1.3033403","DOIUrl":"https://doi.org/10.1063/1.3033403","url":null,"abstract":"This contribution reports the fabrication of pentacene organic field-effect transistor (OFET) with designed space-charge. By including a single layer of silicon nanoparticles as trapping centers, it was possible to create a space-charge field with strong influence on carrier injection and transport. It was found that NPs work as trapping centers of charge carriers. We demonstrate that nanoparticles film can serves for design of accumulated charge in OFET and thus change of charge injection time and transport properties. This behaviour is fully supported by theoretical analysis of the Maxwell-Wagner model. This gives us powerful tool for voltage control of carrier injection time by applied voltage and by setup of nanoparticle density is a possible design electric property.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127796869","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: 11
Sensitivities and noise-resistant performances of various PD sensors located outside a GIS 地理信息系统外各种PD传感器的灵敏度和抗噪声性能
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664532
T. Mizojiri, H. Murase, Y. Sawa, S. Maruyama, T. Nakajima, T. Hoshino
{"title":"Sensitivities and noise-resistant performances of various PD sensors located outside a GIS","authors":"T. Mizojiri, H. Murase, Y. Sawa, S. Maruyama, T. Nakajima, T. Hoshino","doi":"10.1109/ISEIM.2008.4664532","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664532","url":null,"abstract":"This paper deals with the method of PD detection with the sensor (antenna) put at the outside of the GIS tank. It pays attention to the flange of the spacer as a leakage place of the PD electromagnetic radiation. Three kinds of antennas are proposed and made for trial purposes. And comparative study of the three antennas with the internal PD sensor (disc coupler) used worldwide so far is made from the viewpoint of the sensitivity characteristic and the noise-resistant performance. As a result, it is concluded that one kind of antenna has equal or even higher sensitivity to/than the internal disc coupler, without remarkable inferiority about the noise-resistant performance in the frequency range from 1.2 GHz to 2.7 GHz.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130317581","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: 2
The measurement of space charge in solid insulation of inverter-fed motor 变频电机固体绝缘空间电荷的测量
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664514
Jun Liu, Guangning Wu, K. Zhou, Lijun Zhou
{"title":"The measurement of space charge in solid insulation of inverter-fed motor","authors":"Jun Liu, Guangning Wu, K. Zhou, Lijun Zhou","doi":"10.1109/ISEIM.2008.4664514","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664514","url":null,"abstract":"In order to explain the phenomenon of the polymer aged even breakdown under electric stress, the relationship between the space charge and the polymer residual life is studied both in domestic and abroad laboratories. An apparatus that can directly measure the space charge distribution in the polymer insulation materials is developed. Then the space charge distribution in the polymer insulation used in PWM inverter fed motors is tested. Effects of different test condition including pole voltage and frequency are investigated in order to find the aging rule and microcosmic behave of the polymer insulation which worked under the PWM voltage.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132494825","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
Identification of surface discharge based on discharge current waveform in composite insulation system of LN2 and solid insulator 基于放电电流波形的LN2 -固体绝缘子复合绝缘系统表面放电识别
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664515
Y. Tanaka, E. Nakamura, Y. Murakami, S. Yamada, M. Nagao
{"title":"Identification of surface discharge based on discharge current waveform in composite insulation system of LN2 and solid insulator","authors":"Y. Tanaka, E. Nakamura, Y. Murakami, S. Yamada, M. Nagao","doi":"10.1109/ISEIM.2008.4664515","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664515","url":null,"abstract":"Composite insulation system of liquid nitrogen (LN2) and solid insulator, which are widely employed in high-temperature superconducting power equipments, can be deteriorated by partial discharge (PD) generated in highly stressed region such as a triple junction. To investigate the PD mechanism, an individual current waveform of PD generated around the triple junction in LN2 or gaseous nitrogen (GN2) was measured. The longer half bandwidth and the shorter half bandwidth on the PD current waveform were typically observed in LN2, After passing low-pass filter, the PD pattern in LN2 was clearly separated into two clusters. The half bandwidth, being longer in the two clusters, also agreed with that in GN2 at 77 K. Therefore, it is suggested that the current waveform measurement with the measurement of the PD pattern brings the possibility to ascertain presence of the bubbles in LN2. And a frequency analysis of PD current waveform also leads to the appropriate separation between the PD in LN2 and that in bubbles.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132528666","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
Development of 3-D electromagnetic field intensity measurement system using infrared 2-D lock-in amplifier 基于红外二维锁相放大器的三维电磁场强度测量系统的研制
2008 International Symposium on Electrical Insulating Materials (ISEIM 2008) Pub Date : 2008-10-31 DOI: 10.1109/ISEIM.2008.4664504
N. Chiyo, Y. Tanaka, A. Nishikata, T. Maeno
{"title":"Development of 3-D electromagnetic field intensity measurement system using infrared 2-D lock-in amplifier","authors":"N. Chiyo, Y. Tanaka, A. Nishikata, T. Maeno","doi":"10.1109/ISEIM.2008.4664504","DOIUrl":"https://doi.org/10.1109/ISEIM.2008.4664504","url":null,"abstract":"We have developed a 3-D electromagnetic field measurement system using 2-D lock-in amplifier. In this system, a modulated amplitude of electromagnetic wave is illuminated to an absorption screen to generate a heat distribution. A very small change of temperature on a screen illuminated with the modulated electromagnetic wave is measured using an infrared thermograph camera. To show the usefulness of the developed system, we compare the observed temperature change distribution to the optical power distribution emitted from LED light source. From the result, we found that the system is well working and it is possible to measure the temperature change in order of several mK (milli-Kelvin). Furthermore, we tried to use it for measuring an invisible GHz electromagnetic wave. We illuminated the electromagnetic wave to a conductor with shape of ldquoOrdquo. When we observed the temperature change on the screen putting behind the conductor, we can have a clear image of the shape of ldquoOrdquo.","PeriodicalId":158811,"journal":{"name":"2008 International Symposium on Electrical Insulating Materials (ISEIM 2008)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134383549","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
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