2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena最新文献_第8页

Electric Properties of Vegetable Oil-Based Dielectric Liquid and Lifetime Estimation of the Oil-Paper Insulation 植物油基介电液的电性能及油纸绝缘寿命估算

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312023

Caixin Sun, Jian Li, Xiaohu Li, S. Grzybowski

引用次数: 30

Surge voltage stresses across power transformer winding sections provided with metal oxide surge absorber blocks 具有金属氧化物浪涌吸收块的电力变压器绕组段上的浪涌电压应力

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312103

G. Gurumurthy, M. Ansari, J. Amarnath, N. Kishore

{"title":"Surge voltage stresses across power transformer winding sections provided with metal oxide surge absorber blocks","authors":"G. Gurumurthy, M. Ansari, J. Amarnath, N. Kishore","doi":"10.1109/CEIDP.2006.312103","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312103","url":null,"abstract":"Voltage distribution across power transformer winding sections to fast front time surge voltages such as lightning overvoltages can be controlled by providing suitable metal oxide surge absorber (MOA) blocks across these sections. The voltage V, relating to current I through a surge absorber block is given by the equation V = KIbeta (K and beta are constants for the MOA blocks). Computer simulations have been carried out to analyze effect of providing MOA blocks on different sections of power transformer winding. High voltage windings having 'alpha' (Square root of ratio of total ground capacitance to total series capacitance) values 6, 12 and 18 have been analyzed. Initially, several variations were carried out in the computer simulations to investigate whether MOA blocks could be provided across first few sections of windings only. All these investigations indicated that such an arrangement transfers high electrical stresses to sections across which the surge absorber blocks are not provided. In addition these investigations have shown that by providing MOA blocks on each of the sections of the entire winding can only result in considerable reduction of stresses for fast transient voltages. The results have also shown that, for a values 6, 12 and 18 the maximum voltage stress across a section of winding without MOA blocks can be 35%, 51% and 68% respectively and these values with MOA blocks across sections is limited to between 23% to 24%.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":" 47","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120831668","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

Linear stability of an interface between a non-ohmic liquid and air subjected to an electric field and charge injection 在电场和电荷注入作用下，非欧姆液体和空气之间界面的线性稳定性

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312094

R. Chicón, A.T. Perez

引用次数: 0

Effect of cabling and grounding configuration on surge voltages in inverter-fed motors 电缆和接地配置对逆变电机浪涌电压的影响

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1541/IEEJIAS.127.1141

K. Wada, K. Tsuji, H. Muto, O. Yashiro

{"title":"Effect of cabling and grounding configuration on surge voltages in inverter-fed motors","authors":"K. Wada, K. Tsuji, H. Muto, O. Yashiro","doi":"10.1541/IEEJIAS.127.1141","DOIUrl":"https://doi.org/10.1541/IEEJIAS.127.1141","url":null,"abstract":"In inverter-fed motor systems, output voltage of the inverter has a rectangular waveform with rise time of a few tens of nanoseconds, and consequently the motor suffers from repetitive surge pulses which may have adverse effect on motor insulation. The behavior of surge pulses should be clarified to devise the optimum insulation design of a motor. We have investigated how the cable structure and grounding wire connecting the inverter and motor, affects the surge behavior with particular regard to peak voltage between phase terminal to the ground and the peak voltage across the first coil in serially connected multi coils consisting one phase. As a result, we discovered phenomena whereby, when the cross sectional structure of the cable is asymmetrical, the surge voltage of one specific phase can become higher than that of the other phases resulting from the asymmetry among the capacitances between the feeder line and ground line. We have confirmed these phenomena can be prevented by the following three methods: using cables that have symmetrical capacitance to ground among three phases (e.g., a three-phase shielded cable), providing the grounding wire as a separate cable to reduce capacitance between the feeder line and grounding wire, inserting capacitors at motor terminals or inverter terminals to cancel out capacitive asymmetry.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115122196","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

Dielectrics measurements of rotating machines insulation at high temperature (200-400°C) 高温(200-400℃)下旋转机械绝缘的介电测量

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312038

F. Aymonino, T. Lebey, D. Malec, C. Petit, J. Saint Michel, A. Anton

{"title":"Dielectrics measurements of rotating machines insulation at high temperature (200-400°C)","authors":"F. Aymonino, T. Lebey, D. Malec, C. Petit, J. Saint Michel, A. Anton","doi":"10.1109/CEIDP.2006.312038","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312038","url":null,"abstract":"Due to a power density increase, the thermal stresses endured by the electrical insulation of rotating machines are also increasing. However, up to now, most of the characterization (breakdown voltage, permittivity, loss tangent) are carried out in a temperature range which rarely exceeds the thermal class. Consequently, there is a lack of knowledge on the behavior of these materials when they are submitted to temperatures which may reach 50 degC above their thermal class. In this paper, experimental results regarding the electrical behavior of enamels (varnished or not) are presented and discussed. Hence, permittivity and loss tangent are measured from room temperature to 350 degC in the frequency range of 50 Hz-100 kHz. The samples consist in 50 mum films of various polymers (polyester-imide, polyamide-imide) deposited on different conductive plates (copper, stainless steel). To find the impact of the interfaces, some samples are composed of two insulating layers (same or different varnishes). The differences observed between the different polymers are correlated to their chemical structures","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123084477","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: 12

Electron irradiation effects on polymeric films studied by the pulsed electro-acoustic method 用脉冲电声方法研究了电子辐照对聚合物薄膜的影响

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312081

V. Griseri, C. Perrin, K. Fukunaga, T. Maeno, B. Dirassen, D. Payan, C. Laurent

引用次数: 0

Prediction of physical properties of yeast cell suspensions using dielectric spectroscopy 用介电光谱法预测酵母细胞悬浮液的物理性质

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312021

D. J. Currie, M.H. Lee, R. Todd

引用次数: 1

Observation of Charge Distribution in Electron Beam Irradiated Polymers using Pulsed Electro-acoustic Method 电子束辐照聚合物中电荷分布的脉冲电声观察

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312080

W. Dang, M. Tahara, J. Taima, Y. Tanaka, R. Watanabe, T. Takada

{"title":"Observation of Charge Distribution in Electron Beam Irradiated Polymers using Pulsed Electro-acoustic Method","authors":"W. Dang, M. Tahara, J. Taima, Y. Tanaka, R. Watanabe, T. Takada","doi":"10.1109/CEIDP.2006.312080","DOIUrl":"https://doi.org/10.1109/CEIDP.2006.312080","url":null,"abstract":"Charge distributions in electron beam irradiated polymers are observed using the pulsed electro-acoustic (PEA) method. In space environment, bulk charge accumulation in insulating materials of a spacecraft, which is exposed in the radiation of cosmic rays, is one of remarkable problems because the accumulation may sometimes cause of the unexpected accidents followed by the static discharge. Therefore, the interaction between the irradiation of the electron beam (e-beam) and the charge accumulation in bulk of polymers is tried to investigate. To understand the characteristic of the charge accumulation and the incident e-beam, the electrical properties such as the conductivity or the mobility of the carrier in polymers should be studied. Using the simultaneous measurements of the external current and time dependent charge distribution, such properties can be evaluated. To make the simultaneous measurement system, a PEA apparatus for the measurement of the charge distribution in polymers under e-beam irradiation in vacuum condition was carried out. In this paper, the charge profile in e-beam irradiated polytetrafluoroethylene film is presented as a typical example.","PeriodicalId":219099,"journal":{"name":"2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130650931","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

Field Trials of 400 kV Silicone Rubber Composite Insulators in a Coastal Location 沿海400千伏硅橡胶复合绝缘子的现场试验

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.311945

J. Robertson, S. Rowland, Y. Xiong, S. Hoffmann

引用次数: 3

Understanding of Electrical Treeing in PMMA by Partial Discharges and Thermally Stimulated Discharges 局部放电和热激放电对PMMA电树的理解

2006 IEEE Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2006-10-01 DOI: 10.1109/CEIDP.2006.312073

P. Basappa, J. Kim

引用次数: 0