2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第9页

Electroluminescence in divergent field 发散场中的电致发光

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254843

Y. Cao, S. Boggs

引用次数: 3

Electromagnetic radiated field measurements for partial discharge diagnostic 局部放电诊断用电磁辐射场测量

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254935

G. Ala, R. Candela, P. Romano, R. Schifani, F. Viola

{"title":"Electromagnetic radiated field measurements for partial discharge diagnostic","authors":"G. Ala, R. Candela, P. Romano, R. Schifani, F. Viola","doi":"10.1109/CEIDP.2003.1254935","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254935","url":null,"abstract":"Recently, improvements have been made in the diagnostic of electrical insulation systems by means of electric Partial Discharge (PD) standard measurements through a stochastic approach in the treatment of the acquired data: in this way, the identification of the defects as well as the separation of multiple defects simultaneously active, have been successfully performed. However, the standard PD measurement process can be affected by the well-known parasitic effects due to conducted noise whose spectrum can have characteristics similar to those of the measured signal. Moreover, the classic PD measurement system have to be suitable assembled on the Device Under Test (DUT) so determining a complex erection on site operations, which can force the temporary outage of the same DUT and the related equipment. In the aim of overcoming the previous limitations of the classic PD measurement system, in this paper a novel approach for the characterization of the defects in a dielectric material is proposed. It is based on the remote measurement of the ElectroMagnetic (EM) transient field radiated from PD. In order to validate the approach, the standard CIGRE I test cell is used. Different test measurements with different spatial sensors location enable to obtain the PD diagnostic. A comparison with standard electric current-voltage PD measurements has been carried out with a good agreement in terms of diagnostic results.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124600070","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

Current density distribution on gas-liquid two-phase fluid flow in an air-wave type EHD pump 气波型EHD泵内气液两相流体流动的电流密度分布

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254948

M. Kumeta, H. Matsunaga, R. Ohyama, A. Watson, J. Chang

引用次数: 2

Displacement current and trapping mechanisms of electric charges in TiO/sub 2/-rutile tio2 /sub - 2/-金红石中电荷的位移电流和捕获机制

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254833

T. Temga, C. Guerret-Piecourt, D. Juvé, D. Tréheux, C. Jardin

引用次数: 0

The electrical conduction in polyimide nanocomposites 聚酰亚胺纳米复合材料的导电性

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254808

Y. Cao, P. Irwin

引用次数: 53

An experimental study about the treeing phenomena in XLPE subjected to distorted voltages 变形电压作用下XLPE中树形现象的实验研究

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254926

F. Guastavino, L. Centurioni, G. Coletti, A. Dardano, E. Torello

引用次数: 17

Image analysis of gas-phase EHD flow field for needle-plane electrode system 针-平面电极系统气相EHD流场图像分析

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254949

M. Fukumoto, R. Ohyama

引用次数: 13

Electrical insulation characteristics of CO/sub 2/ and CO/sub 2/ gas mixtures under non-uniform electric field 非均匀电场作用下CO/sub - 2/和CO/sub - 2/气体混合物的电绝缘特性

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254911

H. Okubo, N. Koshino, N. Hayakawa

引用次数: 2

Breakdown pattern identification in high temperature dielectric films using scanning electron microscopy (SEM) 用扫描电镜(SEM)识别高温介质薄膜的击穿模式

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254844

S. Ul-Haq, G. Raju

{"title":"Breakdown pattern identification in high temperature dielectric films using scanning electron microscopy (SEM)","authors":"S. Ul-Haq, G. Raju","doi":"10.1109/CEIDP.2003.1254844","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254844","url":null,"abstract":"In this research paper DC breakdown patterns identification were carried out after applying high voltages across samples of 25 /spl mu/m Kapton/spl reg/ (polyimide) and Mylar/spl reg/ polyester (poly(ethylene terephthalate), PET) films. For pattern identifications, Scanning Electron Microscopy (SEM) technique was employed for acquiring 150/spl times/ and 300/spl times/ magnified images. In both images the shape of breakdown area was almost identical to the shape of electrodes. The SEM results clearly revealed that the melting process during high voltage DC breakdown process is higher in case of Mylar/spl reg/ polyester than that of Kapton/spl reg/ (polyimide). In case of Mylar/spl reg/ at room temperature, observed hole diameter was approximately 265.5 /spl mu/m with the total effected area of 55.3/spl times/10/sup -9/ m/sup 2/ at DC breakdown strength of 326.7 MV/m as compared to Kapton/spl reg/, which was 155.7 /spl mu/m with total effected area of 19/spl times/10/sup -9/ m/sup 2/ at breakdown strength of 364.9 MV/m. In these films for the measurement of electrical breakdown strength a new type of environmental chamber was used. Two-parameter Weibull distribution has been used to analyze the results.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128069722","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

Flow electrification by cavity quantum electrodynamics? 空腔量子电动力学的流电化?

2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2003-10-19 DOI: 10.1109/CEIDP.2003.1254943

T. Prevenslik

{"title":"Flow electrification by cavity quantum electrodynamics?","authors":"T. Prevenslik","doi":"10.1109/CEIDP.2003.1254943","DOIUrl":"https://doi.org/10.1109/CEIDP.2003.1254943","url":null,"abstract":"Bubbles are proposed as the source of flow electrification and breakdown in transformers, the bubbles nucleated in flow regions that develop hydrostatic tension. But the bubbles are not assumed to be empty. Owing to surface tension, a micron sized fluid particle is posited to form in the bubble leaving an annular gap with the bubble wall that increases as the bubble expands. At the instant of nucleation, the gap has an electromagnetic (EM) resonance beyond the vacuum ultraviolet (VUV) while the thermal kT energy of fluid molecules in the particle is emitted in the infrared (IR). Because of the higher VUV gap resonance, the IR radiation from the particle is suppressed by cavity quantum electrodynamics (QED). To conserve EM energy within cavity QED constraints, the loss in EM energy by the particle is compensated by a gain in the VUV resonant gap, i.e., the IR radiation undergoes a frequency up-conversion to the VUV. Alternatively, VUV radiation exists in the gap if radiative heat flows from the wall to the particle, as would be the case if the suppression of IR radiation causes the particle to cool to absolute zero. But the Stefan Boltzmann law is not applicable because IR radiation at ambient temperature is prohibited in the VUV resonant gap. A heat flow mechanism is presented to transfer thermal kT energy by VUV travelling waves. The VUV radiation excites impurities on gap surfaces to produce electrons by the photoelectric effect, the positive charged impurities forming the streaming current in the flow.","PeriodicalId":306575,"journal":{"name":"2003 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-10-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132118216","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