Conference Record of the 2006 IEEE International Symposium on Electrical Insulation最新文献_第8页

Discrete state space fitting algorithm for digitally recorded impulse parameter evaluation 数字记录脉冲参数评估的离散状态空间拟合算法

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665308

Jen-Tsan Kuan, Mu-kuen Chen

{"title":"Discrete state space fitting algorithm for digitally recorded impulse parameter evaluation","authors":"Jen-Tsan Kuan, Mu-kuen Chen","doi":"10.1109/ELINSL.2006.1665308","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665308","url":null,"abstract":"Lightning impulse tests are performed on power apparatus to assess its insulation integrity when exposed to over voltage of atmospheric origin. For the evaluation of the test results it is imperative to determine the impulse parameters according to the standards. For the parameter evaluation of the digitally recorded impulse, the eigensystem realization algorithm (ERA) which produces a discrete state space model has been applied to the impulse curve fitting. With appropriate system order, the dynamic state space model is suitable for all types of impulse waveforms. Transforming the identified discrete state space model to the modal coordinates, it is possible to extract the oscillation or overshoot components from the original waveform in analytic function with high accuracy. Depending on the identified oscillation frequency or overshoot duration, the unwanted components can be removed for the construction of the mean curve without significant distortions in the original waveform. This paper demonstrates that ERA is a potentially valuable analytical tool for the evaluation of the impulse parameters","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114138742","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

Electrical and mechanical properties of semi-conductive sheath materials aged at high temperatures in seawater 海水高温老化半导电护套材料的电学和机械性能

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665287

S. Hvidsten, G. Vegge, J. T. Benjaminsen

{"title":"Electrical and mechanical properties of semi-conductive sheath materials aged at high temperatures in seawater","authors":"S. Hvidsten, G. Vegge, J. T. Benjaminsen","doi":"10.1109/ELINSL.2006.1665287","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665287","url":null,"abstract":"Direct electrical heating (DEH) has shown to be a very promising method to prevent wax and hydrate formation in subsea pipelines in the North Sea. In this system the heated pipeline is an active conductor in a single-phase AC electric circuit, together with a single core high voltage extruded cable strapped (piggybacked) to the heated flowline. For new projects with flowlines exceeding 40 km, the insulating outer sheath and the metallic ground screens can be replaced by a semi-conductive outer sheath for a continuous transfer of capacitive currents to seabed, or to clay for buried sections. Due to the relative high temperatures of the crude oil, thermal insulating properties of the clay and heating of the cable conductor, relative high temperatures can be subjected to the cable materials. This paper presents results from measurements of mechanical and electrical properties of different candidate semi-conductive cable outer sheath materials aged in relevant and accelerated service conditions, and measurements of electrical resistivity and water content of clay samples taken from relevant oil fields. The tests also show that approximately the same resistivity was measured for the semi-conductive outer sheath and clay making continuously transferring of AC currents to ground possible","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114652097","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

Efficiency of film capacitors in forced electrothermal modes 薄膜电容器在强制电热模式下的效率

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665323

O. Emelyanov

引用次数: 0

Practical experiences in on-site PD diagnosis tests of HV power cable accessories in service 有在役高压电缆附件PD诊断现场试验的实践经验

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665365

E. Lemke, T. Strehl, W. Weissenberg, J. Herron

引用次数: 11

Online detecting composite insulators by two dimensions electric field distribution 二维电场分布在线检测复合绝缘子

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665274

Yangchun Cheng, Chengrong Li

引用次数: 7

Application of UHF diagnostics to detect PD during power transformer acceptance tests 超高频诊断在电力变压器验收试验中PD检测中的应用

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665346

S. Meijer, P. Agoris, J. Smit, M. Judd, L. Yang

{"title":"Application of UHF diagnostics to detect PD during power transformer acceptance tests","authors":"S. Meijer, P. Agoris, J. Smit, M. Judd, L. Yang","doi":"10.1109/ELINSL.2006.1665346","DOIUrl":"https://doi.org/10.1109/ELINSL.2006.1665346","url":null,"abstract":"Different diagnostic techniques are currently available for on-line insulation condition assessment of power transformers. Amongst these techniques a relatively new technique for detecting partial discharges (PD) in the ultra high frequency range of the spectrum is also introduced. The UHF technique has been recently presented in the field of transformer diagnostics, and although it is under development it shows great potential for on-line detection, recognition and location of PD activity. This paper describes the practical application of the UHF technique on two new identical 90 MVA, 150 kV power transformers. Both transformers are equipped with four external UHF sensors. Initially, injection measurements were performed to investigate the effects experienced by UHF signals when propagating through the transformer. Moreover, software developed to model the propagation of UHF signals inside the transformer tank was tested in its application to these specific transformers. The results obtained during the both the induced voltage test, as well as during the PD acceptance test in the factory are described. The practical experiences related in this paper provide further insight into the application of UHF PD monitoring techniques to power transformers","PeriodicalId":427638,"journal":{"name":"Conference Record of the 2006 IEEE International Symposium on Electrical Insulation","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125462162","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: 16

The curing classifier of dielectrics based on epoxy resins 基于环氧树脂的电介质固化分级器

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665354

V. Mentlík, J. Pihera, R. Polanský, P. Prosr, P. Trnka

引用次数: 4

Performance of 400 kV line insulators under pollution 污染条件下400kv线路绝缘子的性能

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665275

R. Arora, M. Rai, S. K. Yadav

引用次数: 3

Statistical analysis of partial discharge data 局部放电数据的统计分析

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665272

M. Bélec, C. Hudon, D. Nguyen

引用次数: 12

Radiation effects on electrical and mechanical properties of LDPE/EVA blends 辐射对LDPE/EVA共混物电学和力学性能的影响

Conference Record of the 2006 IEEE International Symposium on Electrical Insulation Pub Date : 2006-06-11 DOI: 10.1109/ELINSL.2006.1665307

Chung-Pock Lee, Ki-Yup Kim, B. Ryu

引用次数: 4