Conference Record of the 2004 IEEE International Symposium on Electrical Insulation最新文献_第3页

Study on DC flashover performance of a cylindrical ice model 圆柱形冰模型直流闪络性能研究

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380583

Caixin Sun, Jihe Yuan, Xingliang Jiang, Zhijin Zhang, Jianlin Hu

引用次数: 0

Generator PD measurement by using UHF and HF sensors 利用UHF和HF传感器测量发电机PD

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380428

Xin Li, C.R. Li, L. Ding, Wei Wang, Weijiang Wan

引用次数: 1

Research on plasma explosion of metal wire in water 金属丝在水中等离子体爆炸的研究

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380551

Chunxi Zhang, Jia-xiang Yang, Xiaochun Chi

{"title":"Research on plasma explosion of metal wire in water","authors":"Chunxi Zhang, Jia-xiang Yang, Xiaochun Chi","doi":"10.1109/ELINSL.2004.1380551","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380551","url":null,"abstract":"If a high-density energy is fed into a metal wire in water from high-pulsed power source, the metal wire will explode in a short time in a plasma state. The generated shock wave by the plasma explosion will spread out to arbitrary directions. By using a mechanical binding device or an electromagnetic binding set, the explosion process can show a propulsion effect in a presented direction. In the experiment, steel wires with different diameters and lengths are used as conductive metal load in plasma explosion. A model tube with a bottom shape of paraboloid of revolution is used as mechanical binding device to restrain the shock wave from shooting in a certain direction. The experimental results show that the pressure at sensor location increases with the energy fed into the load and decreases with the distance from the sensor to the explosion source. The energy pumped into the load is larger, the longer the acting time of pressure. It can also be viewed that the highest amplitude of pressure appears at the first peak of shock wave, and the followed peaks decreases quickly. The experimental results also show that with a proper binding method, the plasma explosion of metal wire in water can generate a significant propulsion effect.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129827997","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

Assessment of thermal aging of HVDC converter transformer insulation 高压直流换流变压器绝缘热老化评价

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380535

D. Grant, W. McDermid

引用次数: 8

Accurate determination of ambient temperature at burial depth for high voltage cable ratings 高压电缆额定埋深处环境温度的精确测定

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380643

G. Williams, P. Lewin, M. Leblanc

{"title":"Accurate determination of ambient temperature at burial depth for high voltage cable ratings","authors":"G. Williams, P. Lewin, M. Leblanc","doi":"10.1109/ELINSL.2004.1380643","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380643","url":null,"abstract":"Recently installed high voltage cable circuits often contain temperature monitoring systems that measure the outer surface temperature of one phase of the circuit at discrete intervals over its entire length. This greatly assists in the calculation of the available cable rating. However, well established buried high voltage cable circuits very often have no additional temperature monitoring and the rating is determined using IEC287. In order to improve the accuracy of this rating calculation a model based on thermodynamic laws has been developed that determines the soil or backfill ambient temperature at the cable burial depth. This model uses weather data and can be used to calculate a predicted soil temperature for a given cable depth. This work will present the results obtained comparing ambient temperature measurements made at National Grid Transco's substation at Skelton Grange, Leeds, UK with predictions made using the ambient temperature model. The sensitivity of the model to input parameter sample rate and accuracy has been investigated. Results indicate that providing the meteorological data is sampled hourly and the weather station is no more than 25 miles distant, the ambient temperature can be predicted to within /spl plusmn/2 /spl deg/C.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128274347","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: 7

Improvement of breakdown strength by additives and curing conditions on XLPE insulation for power cable 添加剂和固化条件对提高电力电缆交联聚乙烯绝缘击穿强度的影响

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380586

Bokhee Youn, D. Cho, Sung-Ik Shim

引用次数: 4

Reliability and interval estimation of type-H censored electrical insulation data h型截尾电绝缘数据的可靠性和区间估计

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380614

P. Shetty, T. Ramu

{"title":"Reliability and interval estimation of type-H censored electrical insulation data","authors":"P. Shetty, T. Ramu","doi":"10.1109/ELINSL.2004.1380614","DOIUrl":"https://doi.org/10.1109/ELINSL.2004.1380614","url":null,"abstract":"The paper presents some analytical results pertaining to the estimation of variance of the parameters of a three parameter Weibull distribution (3pW) under type-II censoring. Ageing failure data acquired on an insulating material of considerable application potential has been used to demonstrate the results. The point estimates of the parameters of failure time distribution are obtained using maximum likelihood estimation method. The true value of the variance of the ML estimates for 3pW are hard to obtain and the situation becomes more complex when the data is censored. The asymptotic variance can be obtained by taking the inverse of the Fisher information matrix, the computation of which is quite involved in the case of censored 3-pW data. Approximations are reported in the literature to simplify the procedure. The authors have considered the effects of such approximations on the precision of variance estimates when the sample size is greatly limited by practical difficulties in obtaining the authentic data. A detailed study of the effect of censoring on the ML estimates, under this condition is also presented.","PeriodicalId":342687,"journal":{"name":"Conference Record of the 2004 IEEE International Symposium on Electrical Insulation","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2004-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128715554","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

AC withstand voltage performance of 110 kV iced composite insulators 110 kV结冰复合绝缘子的交流耐压性能

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380584

Jianlin Hu, L. Shu, Caixin Sun, Xingliang Jiang, W. Sima

引用次数: 1

Continuous on-line monitoring of partial discharges in high voltage cables 高压电缆局部放电的连续在线监测

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380640

Y. Tian, P. Lewin, J. Wilkinson, S. Sutton, S. Swingler

引用次数: 19

Ice progressive stress method: repeatability during full-scale testing of 400 kV line and apparatus insulators and application of the test results 冰渐进应力法:400kv线路和设备绝缘子全尺寸试验的重复性及试验结果的应用

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation Pub Date : 2004-09-19 DOI: 10.1109/ELINSL.2004.1380695

I. Gutman, K. Halsan, T. Ohnstad, D. Hiibinette

引用次数: 7