1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena,最新文献

The Influence Of Ionic And Non-ionic Additives On The Electric Potential Distribution In Dielectric Liquids 离子和非离子添加剂对介电液体电势分布的影响

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763336

R. E. Barker, D. B. Holt, F. Junghans

引用次数: 0

Capacitance Voltage Characteristics Of Stearic Acid Insulating Films In Mis Devices 硬脂酸绝缘膜在Mis器件中的电容电压特性

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763967

S. Alam

引用次数: 0

The Influence Of Ions On The Dc Conductivity And Thermally Stimulated Discharge Current (TSDC) Spectra Of Water Treed Additive Free Low Density Polyethylene 离子对无添加剂低密度聚乙烯直流电导率和热激放电电流(TSDC)谱的影响

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763375

R. Fouracre, Li Huimim, B. Crichton, V. Banks

引用次数: 3

Diagnosis expert system for the life time of transformers by using fuzzy Clustering 基于模糊聚类的变压器寿命诊断专家系统

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763966

I. Terayama, Y. Kenmochi, J. Kobayashi, N. Iijima, H. Mitsui, M. Sone

{"title":"Diagnosis expert system for the life time of transformers by using fuzzy Clustering","authors":"I. Terayama, Y. Kenmochi, J. Kobayashi, N. Iijima, H. Mitsui, M. Sone","doi":"10.1109/CEIDP.1991.763966","DOIUrl":"https://doi.org/10.1109/CEIDP.1991.763966","url":null,"abstract":"1.Introduction In general, it is known that a life time of dry type transformer is reduced remarkably by partial discharges. The quality of insulation is kept constant as possible in the factory, but sometimes it is scattered by some reasons. The reliability of the products is much influenced by scatters of the quality. Therefore, it is very important to predict the life time of the products. So far it was done by measuring a withstand voltage. However, the withstand voltage test means a destruction of the products, so it is necessary to predict the life time by using undestructive tests. As an undestructive test, the magnitude of the partial discharge will be adaptable to an expert system for life time prediction. General expert systems were based on some threshold value, which did not have an objective meaning. So it is necessary to evaluate more objectively. By using an expert system with fuzzy clustering, it can be done to make a judgment taking the interactions of each data into considerat ion. Even if a characteristic of life time is not clear, this type of expert systems can establish an optimum expert with learning, and can watch not only the products but also the relationship between conditions of manufacturing machines and life. However, fuzzy clustering has a flaw that if data numbers increases, handling time becomes extremely long. So, it can not to do real time diagnosis of the products in manufacturing line. Therefore, we apply a high speed algorism using DSP (Digital Signal Processor) with high calculating speed to our expert system. In this paper, we suggest a diagnosis expert system for the life time of transformers by using fuzzy clustering and describe a method of prediction of life time in the manufacturing line.","PeriodicalId":277387,"journal":{"name":"1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129520835","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

A preliminary study of the relationship between matrix morphology and water treeing in medium voltage polymeric insulated cable 中压聚合物绝缘电缆基质形态与水树关系的初步研究

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763382

S. Moody, V. Banks, A. Vaughan

引用次数: 5

Final Breakdown Mechanism Of Water Treeing 水树的最终分解机制

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763374

S. Bamji, A. Bulinski, R. Densley

引用次数: 14

Evidence for SF/sub 4/ and SF/sub 2/ formation in SF/sub 6/ corona discharges SF/sub 6/电晕放电中SF/sub 4/和SF/sub 2/形成的证据

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763950

I. Sauers

引用次数: 0

The Operation Of Moisture Equilibrium In Determining Electrification In Oil/cellulose Structures 水分平衡在测定油/纤维素结构中起电作用的作用

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763344

J. Nelson, M. Brubaker, S. Lindgren

引用次数: 4

Charge Injection Into Dielectric Oil From The Anode Or Cathode Under Ramped Voltage Application 斜坡电压作用下阳极或阴极向介电油的电荷注入

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763946

D.H. Ren, A. Watson

{"title":"Charge Injection Into Dielectric Oil From The Anode Or Cathode Under Ramped Voltage Application","authors":"D.H. Ren, A. Watson","doi":"10.1109/CEIDP.1991.763946","DOIUrl":"https://doi.org/10.1109/CEIDP.1991.763946","url":null,"abstract":"From an e a r l i e r study in s i l i c o n e o i l , the average cur ren t response t o r i s i n g and f a l l i n g vol tage appears on a log-log s c a l e with two l i n e a r port ions which a r e sharply divided a t high f i e l d [l]. Both of these two port ions obey the equation I a VS, i n which Su and Si a r e re fer red t o as the upper s lope and lower slope. Figure 1 gives a typical p l o t o f the average cur ren t a s a function of the t r i a n g u l a r applied voltage i n log-log sca le . According t o a theory o f charge t ranspor t in d i e l e c t r i c l iqu id [Z] , i t i s proposed t h a t under slow t r i a n g u l a r voltage waveform appl ica t ion t h e process may occur by in jec t ion of e lec t rons from the cathode in t h e highest f i e l d region. The lower s lope represents the cur ren t c h a r a c t e r i s t i c in the lower (intermediate) f i e l d region. The lower s lope i n the intermediate f i e l d s t rength regime has not so f a r been invest igated c lose ly . I t has been hypothesized t h a t the lower s lope o r i g i n a t e s in some pos i t ive ion i n j e c t i o n process very much as e lec t rons are in jec ted from t h e cathode a t the highest f i e l d s t rengths . Indeed, s i l i c o n e o i l i s a homocharge 1 iquid according t o the c l a s s i f i c a t i o n of Guizonnier [3] and as such wil l have e lec t ron i n j e c t i o n under the control of the cathode material sur face while pos i t ive ion production i s determined by the anode. In addi t ion t o any such process, pos i t ive ions can appear and remain in the l iqu id from other mechanisms.","PeriodicalId":277387,"journal":{"name":"1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena,","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132559055","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

Streak Camera Observations of Partial Discharg Polyethylene under Fast Impulse Voltage Stress 快速脉冲电压应力下局部放电聚乙烯的条纹相机观察

1991 Annual Report. Conference on Electrical Insulation and Dielectric Phenomena, Pub Date : 1991-10-20 DOI: 10.1109/CEIDP.1991.763381

J. Parpal

引用次数: 0