2011 Electrical Insulation Conference (EIC).最新文献_第10页

Effects of ultraviolet radiation and artificial pollution on the leakage current of Silicon Rubber insulators 紫外线辐射和人工污染对硅橡胶绝缘子泄漏电流的影响

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996167

I. A. Joneidi, J. Jadidian, R. Karimpour, A. Shayegani, H. Mohseni

{"title":"Effects of ultraviolet radiation and artificial pollution on the leakage current of Silicon Rubber insulators","authors":"I. A. Joneidi, J. Jadidian, R. Karimpour, A. Shayegani, H. Mohseni","doi":"10.1109/EIC.2011.5996167","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996167","url":null,"abstract":"Environmental and electric stresses have great ageing impacts on the polymer insulators. Ultraviolet (UV) radiation is one of the most important environmental factors that affects the degradation of Silicon Rubber (SiR) insulators. This paper presents the accelerated ageing records of a 20 kV SiR insulator in a chamber containing nine UVC lamps with intensity of 50 W/m2 for 65 days. Ageing process has been performed in order to analyze the effects of UV on the hydrophobicity and the surface leakage current level (LC) of SiR insulators. The results indicate that the variations of LC in clean insulator surface comparing with the insulators exposed to UV are negligible; however, UV has direct impact on the hydrophobicity of insulator surface. Solid layer pollution method is applied according to IEC60507 standard and quantitative comparisons are performed between the hydrophobicity of aged and clean insulator surfaces. Fast Fourier transform (FFT) method used to find the harmonic spectrum of the LC for three distinct cases: 1) without arc (nominal voltage), 2) in presence of dry band arcing and corona discharge and 3) continuous arc. In two latter cases, the level of 3rd harmonic component of leakage current waveform is closely related to the amount of pollution on the insulator surface.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128559133","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

Evaluation of vacuum encapsulation systems for integral motors 整体电机真空封装系统的评价

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996142

H. Penrose, Donald Wittmuss

引用次数: 6

Prediction of the turn-to-turn voltages in parallel connected wires configuration for motor coils fed by steep fronted pulses 陡前脉冲驱动电机线圈并联时匝间电压的预测

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996188

V. Mihãilã, S. Duchesne, D. Roger, P. Liegeois

引用次数: 17

Optimized, emission free production process for main wall insulation with enhanced lifetime properties 优化，无排放的生产工艺，提高了主墙保温材料的使用寿命

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996143

T. Baumann, T. Hillmer, P. Klee, D. Stoll

引用次数: 3

Overvoltage cycling and endurance tests on full scale capacitors 全尺寸电容器的过压循环和耐久性测试

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996211

R. Morin, R. Neufeld, R. Bartnikas

引用次数: 1

Developments relating to litz wire in the insulation systems of generators for renewable energies 可再生能源发电机绝缘系统中利兹丝的发展

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996109

M. Chapman, T. Kaffenberger, A. Matveev, P. K. Olsen

{"title":"Developments relating to litz wire in the insulation systems of generators for renewable energies","authors":"M. Chapman, T. Kaffenberger, A. Matveev, P. K. Olsen","doi":"10.1109/EIC.2011.5996109","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996109","url":null,"abstract":"As new designs for generators applied in the renewable energy market appear and rated power continues to increase, litz-wire winding technology has brought its advantages to machine and process efficiency. The division into many strands increases flexibility, facilitating the processing of larger and special windings, and reduces high-frequency winding resistance, reducing losses. The use of litz wire, however, impacts the insulation system. The litz-wire profile locally enhances electric field strength, with implications for the mainwall and turn insulations. Conductor mica tape can provide appropriate turn insulation, but influences wire flexibility, coil consolidation, and finally resin penetration during impregnation. During vacuum-pressure impregnation, resin should penetrate both the region between turns and the litz wire itself, without draining during curing. This can impose new requirements on the impregnation process and on the choice of resin, which must deal with low pressure and lack of catalyst inside the litz wire. The paper reports on considerations and investigations of such aspects in real generator designs.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"222 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134144898","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

Analysis of the pollution accumulation and flashover characteristics of field aged 110kV composite insulators 110kV现场老化复合绝缘子污染积累及闪络特性分析

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996129

Zhijin Zhang, Haizhou Huang, Xingliang Jiang, Mingying Chen, Jianlin Hu

{"title":"Analysis of the pollution accumulation and flashover characteristics of field aged 110kV composite insulators","authors":"Zhijin Zhang, Haizhou Huang, Xingliang Jiang, Mingying Chen, Jianlin Hu","doi":"10.1109/EIC.2011.5996129","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996129","url":null,"abstract":"This paper takes the composite insulator being operated in a certain 110kV power network in China as the sample, tests and analyzes the pollution depositing rules and flashover performance of it. Test results indicate that the equivalent salt deposit density (ESDD) and non-soluble deposit density (NSDD) on the upper and lower surface of composite insulators energized running voltage is different. The ratio of the ESDD and NSDD of upper surface to that of lower surface is 0.76 and 0.46 separately. The structure and shape of polymeric insulators have influence on the pollution deposit levels and non-uniform degree. The dispersion of the pollution flashover voltage of naturally polluted composite insulators is great. Under the same condition, the pollution flashover voltage of naturally polluted composite insulators is higher about 50% than that of artificially polluted composite insulators. The difference of hydrophobicity, component of contamination and non-uniform degree of pollution are the main reason that caused the pollution flashover voltage of naturally polluted composite insulators is higher than that of artificially polluted composite insulators.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132998857","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: 8

Study on the transference of hydroplibocity for Kaolin and Kieselgur 高岭土和基泽尔土的水亲和性迁移研究

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996127

Gongmao Peng, Z. Guan, Fuzeng Zhang, Liming Wang

{"title":"Study on the transference of hydroplibocity for Kaolin and Kieselgur","authors":"Gongmao Peng, Z. Guan, Fuzeng Zhang, Liming Wang","doi":"10.1109/EIC.2011.5996127","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996127","url":null,"abstract":"As two of the inert materials which were widely used in the artificial pollution test and recommended by IEC standard, Kaolin and Kieselgur were studied in the paper. The DC flashover voltage of porcelain insulators which was contaminated by Kaolin was much closed to Kieselgur, and the same as glass insulators. But the conclusion was quiet different for composite insulator. The flashover voltage of polymeric insulator contaminated by Kieselgur was larger about 14.7% than Kaolin under the same condition because of their significant difference of transfer characteristics. The reason of hydrophobicity migration difference of the two is revealed by scanning electron microscope (SEM), ASAP 2020 specific surface area and porosity analyzer, thermogravimetric analysis (TG), and Fourier Transform Infrared Spectrum (FTIR), respectively. The result shows that the hydroxyl (-OH) within Kaolin molecular is an important reason that cause hydrophobicity migration difference of Kieselgur and Kaolin, other than microphysics structure, specific surface area, total pore volume, average pore diameter. The result can be adopted to give theoretical reference to lay down rule of DC artificial pollution test for composite insulator.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130719947","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

Gas-sensing simulation of single-walled carbon nanotubes applied to detect gas decomposition products of SF6 in PD 单壁碳纳米管气敏模拟用于检测PD中SF6气体分解产物

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996132

Xiaoxing Zhang, Fansheng Meng, Zhen Wang, Jian Li

{"title":"Gas-sensing simulation of single-walled carbon nanotubes applied to detect gas decomposition products of SF6 in PD","authors":"Xiaoxing Zhang, Fansheng Meng, Zhen Wang, Jian Li","doi":"10.1109/EIC.2011.5996132","DOIUrl":"https://doi.org/10.1109/EIC.2011.5996132","url":null,"abstract":"Chemical products detection and analysis has been demonstrated as a powerful diagnosis method for SF<inf>6</inf> gas-insulated switchgear (GIS). In this paper, Materials Studio software was used to simulate single-walled carbon nanotube (SWNT) detecting gas decomposition products of SF<inf>6</inf> in partial discharge (PD). The simulation results show SWNT was the most sensitive to SO<inf>2</inf>F<inf>2</inf> among the gas decomposition products of SF<inf>6</inf>. SO<inf>2</inf>F<inf>2</inf> molecules adsorbed on SWNT not only obviously changed electronic structures of SWNT, increasing the density of states (DOS) near Femi level, but also greatly reduced the energy gap of SWNT, enhancing its electrical conductivity. However, SWNT is insensitive to HF, H<inf>2</inf>S and CF<inf>4</inf> molecules because its properties were hardly changed when HF, H<inf>2</inf>S and CF<inf>4</inf> molecules were adsorbed on SWNT. Although SO<inf>2</inf> and SOF<inf>2</inf> molecules adsorbed on SWNT have changed the properties of SWNT to some extent, SO<inf>2</inf> and SOF<inf>2</inf> cannot be respectively detected by SWNT due to the cross-sensitivity between them.","PeriodicalId":129127,"journal":{"name":"2011 Electrical Insulation Conference (EIC).","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114667016","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

Measurement of electromagnetic waves emitted from partial discharge generated in PLG type-ground coil for superconducting Maglev 超导磁悬浮列车用PLG型接地线圈局部放电电磁波的测量

2011 Electrical Insulation Conference (EIC). Pub Date : 2011-06-05 DOI: 10.1109/EIC.2011.5996189

M. Kawada, Masao Suzuki, S. Ota

引用次数: 5