2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第4页

Experimental study of the breakdown characteristic of glycerol as energy storage medium in pulse forming line 甘油作为储能介质在脉冲形成线击穿特性的实验研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748250

H. B. Zhang, J. Yang, F. Gao, J. J. Lin

引用次数: 5

Electrical and plasma characteristics of nanosecond-pulse surface discharge under varying pressure 变压下纳秒脉冲表面放电的电学和等离子体特性

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748215

H. Song, M. Jia, D. Jin, W. Cui, W. Wu

{"title":"Electrical and plasma characteristics of nanosecond-pulse surface discharge under varying pressure","authors":"H. Song, M. Jia, D. Jin, W. Cui, W. Wu","doi":"10.1109/CEIDP.2013.6748215","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748215","url":null,"abstract":"Plasma flow control, based on plasma aerodynamic actuation (PAA), has become a newly-rising focus of international aerodynamic and thermodynamic fields. Nanosecond-pulse surface discharge is considered to be a new way of generating plasma aerodynamic actuation. When it comes to the practical application, the altitude at which plasma flow control is expected to be adopted is about 10-20km, where the static pressure is only 40-185 Torr, and it is much lower than atmospheric pressure. In this paper, with a three-electrode plasma sheet actuator, the electrical and plasma characteristics of nanosecond-pulse surface discharge are experimentally investigated under varying pressures. A RO4350B (high frequency circuit material, Rogers) plate with the thickness of 1 mm and relative permittivity constant of 3.48 is taken as the dielectric layer of the plasma sheet actuator. The discharge pattern changes from dielectric barrier discharge to sliding discharge when the pressure is under 200Torr. As the pressure decreases from 760 Torr to 5 Torr, N2(C3Πu) vibrational temperature decreases slightly at first and then increases remarkably. With the pressure of about 80 Torr, the change of discharge mode from a filamentary type to a glow type has been observed. In the filamentary mode, the electron temperature hardly changes, while in the glow mode, the electron temperature increases obviously with the decrease of pressure.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126323573","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

Effects of stearic acid and thermal treatment on morphology and dielectric properties of UHMWPE/POSS composites prepared by ball milling 硬脂酸和热处理对球磨UHMWPE/POSS复合材料形貌和介电性能的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748299

M. Guo, M. Frechette, É. David, H. Couderc, N. Demarquette

{"title":"Effects of stearic acid and thermal treatment on morphology and dielectric properties of UHMWPE/POSS composites prepared by ball milling","authors":"M. Guo, M. Frechette, É. David, H. Couderc, N. Demarquette","doi":"10.1109/CEIDP.2013.6748299","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748299","url":null,"abstract":"For the last decade, there has been lots of interest in the development of nanodielectrics as these materials may present superior dielectric properties when compared to traditional composites. However, the success of these materials relies on a proper dispersion of nanofillers within the matrix. In this work, UHMWPE/POSS composite of Ultra-High-Molecular Weight PolyEthylene (UHMWPE) with 5% wt Octaisobutyl Polyhedral Oligomeric SilSesquioxanes (POSS) was prepared by ball milling. In order to enhance the dispersion of POSS within UHMWPE, two routes were tested: 1) stearic acid in a concentration of 1% wt (versus POSS filler) was added to UHMWPE and POSS blend during ball milling; 2) a thermal treatment on UHMWPE/POSS composite at a pressure of 6.3×106 Pa and an average temperature of 453 K for 7200 s was carried out. The resulting composites were tested using optical microscopy, heat-flux differential scanning calorimetry, broadband dielectric spectroscopy and short-time breakdown. The results showed the first route seemed to have little effect on enhancing the dispersion of POSS within UHMWPE matrix nor the dielectric properties of UHMWPE/POSS composite. The results also showed the second route seemed to have a positive effect on enhancing the dispersion of POSS within UHMWPE matrix yet a negative effect on the dielectric properties of UHMWPE/POSS composite.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126358490","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

Thermally stimulated current and dielectric studies of liquid crystal composites 液晶复合材料的热激电流和介电研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748149

N. Gao, Chun Wu, Wenxi Zhang, Chi Chen, H. Jin, Wentao Ji

{"title":"Thermally stimulated current and dielectric studies of liquid crystal composites","authors":"N. Gao, Chun Wu, Wenxi Zhang, Chi Chen, H. Jin, Wentao Ji","doi":"10.1109/CEIDP.2013.6748149","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748149","url":null,"abstract":"Recently, composite materials of liquid crystal polymer (LCP) and inorganic filler attracted the attention of the electrical industry. In this research, the relationships between thermally stimulated current (TSC) of liquid crystal (LC) composites and the polarization temperature (Tp), polarization voltage (Vp) and heating rate (β) were investigated respectively. The variation of trap levels and trapped charges under different experimental conditions were calculated and analyzed. Trap levels of the peaks in temperature range (-60°C~150°C) were about 0.2eV, 0.9~1.5eV and 2.0~2.5eV. In addition, the dielectric spectrum test was performed on LC composites. Permittivity (εr) changed little (3.4~3.9) in frequency range of 20Hz~106Hz and temperature range -60°C ~100°C, but increased sharply when temperature was above 140°C. The values of loss (tanδ) increased sharply in low frequencies (≤ 20Hz) and high temperatures (≥ 130°C) region. The peak of tanδ shifts to higher temperatures with frequency increasing and to higher frequencies with temperature increasing.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126459032","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

Calculation model simplification study for porcelain insulator string potential and grading ring surface electric field distribution of UHV AC transmission line 特高压交流输电线路瓷绝缘子串电位及分级环面电场分布计算模型简化研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747416

Daochun Huang, Zheng Zheng, Z. Huang, Wang Guoli, J. Ruan, Peng Li

{"title":"Calculation model simplification study for porcelain insulator string potential and grading ring surface electric field distribution of UHV AC transmission line","authors":"Daochun Huang, Zheng Zheng, Z. Huang, Wang Guoli, J. Ruan, Peng Li","doi":"10.1109/CEIDP.2013.6747416","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6747416","url":null,"abstract":"The finite element model of the Ultra High Voltage (UHV) AC transmission line porcelain insulator string potential distribution and grading ring surface electric field distribution calculation has the characteristics of large size, complicated structure and various mediums. To insure the accuracy, related influencing factors should be considered to simplify the model reasonably for high computational efficiency. A whole and simplified 3D finite element models of UHV AC transmission line porcelain insulator string were built. The influencing factors including tower, phase conductors, hardware fittings, yoke plate and phase interaction were considered in the analysis of the potential and electric field distribution. And finally, the reasonable of the simplified model was validated. The results comparison show that building a simplified model of three-phase bundled conductors within a certain length, simplifying the tower reasonably, omitting the hardware fittings and yoke plate and containing only single-phase insulator string model is feasible. The simplified model could replace the whole model to analyze the potential distribution along the porcelain insulator string and the electric field distribution on the grading ring surface, and it can reduce the calculation scale, improve optimization efficiency of insulators string and grading ring parameters.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125637920","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

The Influence of corona discharge on space charge accumulation in polyimide film 电晕放电对聚酰亚胺薄膜空间电荷积累的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748242

T. Kan, K. Abe, H. Miyake, Y. Tanaka, T. Maeno

{"title":"The Influence of corona discharge on space charge accumulation in polyimide film","authors":"T. Kan, K. Abe, H. Miyake, Y. Tanaka, T. Maeno","doi":"10.1109/CEIDP.2013.6748242","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748242","url":null,"abstract":"The space charge accumulation processes in polyimide film under corona discharge from spherical electrode are observed using improved open-electrode type PEA (pulsed electro-acoustic) measurement system. To reduce the electric power consumption, the efficient-energy motor is required to be developed. One of effective improvement of the efficiency of motors is to increase the driving voltage for it. However, if the driving voltage is increased, a large, so called “inverter serge voltage” is applied to the coating insulating material for the motor windings, then partial discharge (PD) occurs between the wires or the wire and the grounded metal of the motor. The partial discharge gives serious damages to the insulating material and it leads the breakdown finally in the insulating material. Therefore, it is important to understand the mechanism of the generation of partial discharge. Especially, the space charge formed in the insulating material under such condition is supposed to affect the generation of the partial discharge. However the relationship between the space charge and the PD haven't been cleared yet. Therefore, we have tried to measure the space charge accumulation in the material under corona discharge using PEA system. In this report, some typical results of space charge profiles measured after surface discharge are introduced. As the results, we have found that the space charge formation in polyimide film under corona discharge is easy to accumulate.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134118521","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

Effect of doped Co2O3 on Dielectric Properties of ZnO Varistor 掺Co2O3对ZnO压敏电阻介电性能的影响

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6747440

Chuntian Chen, Yulong Qiao, Dongsheng Wang, Qichao Shi, Haifeng Yang, Ximing Wang

引用次数: 0

Defects detection and localization of short cables with DAC method 用DAC法检测短电缆的缺陷及定位

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748178

Jun Jiang, G. Ma, W. Chang, Jian He, D. Luo, Chengrong Li, Qingmin Li

引用次数: 1

Preparation and properties of PI-EP/SiO2-Al2O3 composite material PI-EP/SiO2-Al2O3复合材料的制备及性能研究

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748160

Yu-fei Chen, Zhong-Xuan Bian, Qi-wang Dai, Liping Wang, Zuoyu Wu

{"title":"Preparation and properties of PI-EP/SiO2-Al2O3 composite material","authors":"Yu-fei Chen, Zhong-Xuan Bian, Qi-wang Dai, Liping Wang, Zuoyu Wu","doi":"10.1109/CEIDP.2013.6748160","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748160","url":null,"abstract":"In this study, polyimide (PI)-epoxy resin (EP) polymer matrix was prepared from 3,3'-diethyl-4,4'-diamino diphenyl methane (DEDADPM), benzophenone tetracarboxylic acid dianhydride (BTDA) and EP (E-51), through thermal imide process, and then the nano-SiO2 and Al2O3 were doped into the PI-EP polymer matrix with Sol-gel method, prepared a series of different contents of inorganic components nano-composite materials. Morphology characterization and properties of the composite were discussed, including structure, uniformity and dispersion of inorganic phase as well as shear strength and breakdown strength of composite. And influencing factors were composed of the contents and mass ratio of inorganic components. It indicated that imidization of composite was complete in FT-IR spectra, and Si-O-Si and Al-O-Al bonds existed in PI-EP/SiO2-Al2O3 composite material. There were linkages between polyimide matrix and nano-particles. And, the result of X-ray diffraction (XRD) has been seen that crystallinity existed in PI-EP/SiO2-Al2O3 film. Results of diversified test indicated that inorganic contents and mass proportion of inorganic components could influence shear strength and breakdown strength of composite. When the mass ratio of SiO2/Al2O3 was 3:1 and total content of inorganic components reached 5wt% its breakdown strength was the most outstanding and attained 208MV/mm and increased 20% than that of polymer matrix. When the mass ratio of SiO2/Al2O3 was 0:1 and total content of inorganic components reached 5wt% the shear strength of PI-EP/SiO2-Al2O3 was the highest among the samples and reached 11.9 MPa, which was 70% higher than that of PI-EP (7 MPa).","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"263 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133646996","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

Surface discharges over insulators of various materials in presence of SF6, CO2, N2 and SF6-CO2 and SF6-N2 mixtures under DC voltage 直流电压下SF6、CO2、N2及SF6-CO2和SF6-N2混合物存在下各种材料绝缘子的表面放电

2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2013-10-01 DOI: 10.1109/CEIDP.2013.6748170

F. Sadaoui, A. Beroual

{"title":"Surface discharges over insulators of various materials in presence of SF6, CO2, N2 and SF6-CO2 and SF6-N2 mixtures under DC voltage","authors":"F. Sadaoui, A. Beroual","doi":"10.1109/CEIDP.2013.6748170","DOIUrl":"https://doi.org/10.1109/CEIDP.2013.6748170","url":null,"abstract":"This paper is aimed at the experimental characterization of discharges propagating at solid/gas interfaces under DC voltage using a point-plane electrode arrangement. Specifically, we analyze the morphology of creeping discharges and their final (i.e., stopping or maximum extension) length against the type of insulator and its thickness, the amplitude of the applied voltage, the type of gas (mixture) and its pressure. The insulators we investigate are Bakelite and glass; and the considered gases are N2, SF6, CO2 and mixtures SF6 - N2 and SF6 - CO2. The obtained results show that the discharges can be radial or not depending on the type of interfaces. However, as we observed for AC and lightning impulse voltages, the final length Lf increases quasi-linearly with the voltage; it decreases when the gas pressure increase. Lf is shorter in SF6 than in CO2 or N2; and the increase of SF6 content in the investigated mixtures leads to a significant decrease of Lf.","PeriodicalId":393969,"journal":{"name":"2013 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132156165","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