2012 1st International Conference on Power and Energy in NERIST (ICPEN)最新文献_第4页

Power and rate adaptation techniques with uncoded MQAM over TWDP fading channels 在TWDP衰落信道上使用未编码MQAM的功率和速率自适应技术

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492322

Bhargabjyoti Saikia, R. Subadar

引用次数: 3

Design & performance analysis of a power-factor-corrected constant light output electronic ballast 功率因数校正恒光输出电子镇流器的设计与性能分析

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492331

Debadyuti Banerjee, S. Mazumdar, A. K. Sur

引用次数: 1

Self-bearing switched reluctance motor: A review 自轴承开关磁阻电动机的研究进展

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492346

F. Ahmed, D. Saikia, S. Chatterjee, Himani Singh, Priyanandini Das, K. Kalita

引用次数: 6

Applicability of Stockwell transform in diagnosing impulse faults of a transformer 斯托克韦尔变换在变压器冲击故障诊断中的适用性

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492343

A. Baral, A. Lahiri

{"title":"Applicability of Stockwell transform in diagnosing impulse faults of a transformer","authors":"A. Baral, A. Lahiri","doi":"10.1109/ICPEN.2012.6492343","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492343","url":null,"abstract":"Lightning impulse test is one of the mandatory tests that every transformer has to undergo after assembly. This is done for assessing the condition of insulation of its windings. In the case of any fault, the neutral current and/or tank current contain(s) typical signatures depending on the nature and location of the fault. Since these current signals are non-stationary in nature hence each of these faults can be classified from such a transformation technique that has the time-frequency localization property. This paper investigates the performance of Stockwell Transform, popularly known as S-transform, for identification of insulation failures of a transformer winding during impulse test. The present study is restricted only to identify failure of winding insulation due to some defects that are already present in the winding and have not been developed due to the application or during the propagation of impulse voltage applied during the test. The results presented in this paper are for simulated models of a 3 MVA and a 5 MVA transformer. From the results, the prospect of S-transform in identifying the nature and the location of winding faults in distribution transformers is reflected.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128200704","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

Understanding the effects of moisture equlibrium process on dielectric response measurements for transformer oil-paper insulation systems 了解水分平衡过程对变压器油-纸绝缘系统介电响应测量的影响

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492317

S. K. Ojha, P. Purkait, Sivaji Chakravorti

{"title":"Understanding the effects of moisture equlibrium process on dielectric response measurements for transformer oil-paper insulation systems","authors":"S. K. Ojha, P. Purkait, Sivaji Chakravorti","doi":"10.1109/ICPEN.2012.6492317","DOIUrl":"https://doi.org/10.1109/ICPEN.2012.6492317","url":null,"abstract":"Moisture present in oil and paper insulation is extremely damaging for healthy operation of a transformer. Moisture not only reduces electrical, chemical, mechanical and dielectric strength of the insulation, it also accelerates the insulation ageing process, thereby reducing its effective remaining life. It is thus of high interest for the utilities to have accurate quantitative estimates of moisture content in oil and cellulose insulation of a transformer. Oil moisture can be measured by chemical analysis of oil samples collected from running transformer. On the other hand, collecting paper sample for moisture measurement being extremely difficult, moisture content in paper are normally estimated from measured oil moisture values using certain mathematical equations, or equilibrium charts or recently, from dielectric response measurements. Such estimation of paper moisture content from measured values of oil moisture is largely dependent on the equilibrium status of moisture in the oil-paper insulation assembly. This equilibrium process is highly temperature dependent and thus poses serious accuracy issues in moisture estimation procedures. The present contribution reports results of experiments performed on the oil-paper insulation structure of a model transformer. Operating temperatures have been varied over a range of 40°C to 80°C to study the effects of moisture equilibrium process on measurement of oil moisture and estimate of paper moisture there from. Dielectric response analysis using polarization and depolarization currents (PDC) measurement have been used to further study the effects of moisture equilibrium at different temperatures. A comparative analysis of oil and paper moisture estimates using chemical tests, mathematical formulae, equilibrium charts and dielectric response measurements have also been reported in this article.","PeriodicalId":336723,"journal":{"name":"2012 1st International Conference on Power and Energy in NERIST (ICPEN)","volume":"513 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134292205","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: 6

TITO system identification using relay with hysteresis 用带磁滞的继电器对TITO系统进行辨识

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492321

Bajarangbali, S. Majhi

引用次数: 6

Pomegranate dye as a green energy material 石榴染料作为一种绿色能源材料

2012 1st International Conference on Power and Energy in NERIST (ICPEN) Pub Date : 2012-12-01 DOI: 10.1109/ICPEN.2012.6492312

L. Singh, T. Karlo, A. Pandey

引用次数: 1