2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena最新文献_第2页

The Effect of Acetophenone and alpha-Methylstyrene on the Space Charge Properties of Low Density Polyethylene 苯乙酮和甲苯乙烯对低密度聚乙烯空间电荷性能的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-26 DOI: 10.1109/CEIDP.2008.4772919

N. Hussin, G. Chen

引用次数: 7

Polyethylene/Dibenzylidene Sorbitol: effect of composition on space charge of polymeric insulation systems 聚乙烯/二苄基山梨醇:组分对聚合物绝缘体系空间电荷的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-26 DOI: 10.1109/CEIDP.2008.4772890

G. Gherbaz, G. Chen, A. Vaughan

引用次数: 5

Influence of Capacitive Effects on the Characteristics of Creeping Discharges Propagating over Solid/Liquid Interfaces under Impulse Voltages 冲击电压下电容效应对在固液界面上传播的蠕变放电特性的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-26 DOI: 10.1109/CEIDP.2008.4772802

A. Beroual, L. Kebbabi

引用次数: 10

Moisture and Aging Effect on the Creepage Discharge Characteristics at the Oil/Transformer-board Interface under Divergent Field 发散场下湿气和老化对油/变压器-板界面爬电放电特性的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772837

J. Dai, Z. Wang, P. Jarman

引用次数: 26

Study of Solid Dielectric Degradation Using Partial Discharge Test 用局部放电试验研究固体介质降解

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772853

P. Sreejaya

引用次数: 3

Review of Partial Discharge Monitoring techniques used in High Voltage Equipment 高压设备局部放电监测技术综述

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772825

R. Schwarz, T. Judendorfer, M. Muhr

{"title":"Review of Partial Discharge Monitoring techniques used in High Voltage Equipment","authors":"R. Schwarz, T. Judendorfer, M. Muhr","doi":"10.1109/CEIDP.2008.4772825","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772825","url":null,"abstract":"To ensure economic operation of high voltage equipment, reliable condition evaluation concepts are essential. They enable long-term inspection strategies with regard to a maximized service life of each component. Condition based maintenance (CBM) is therefore desirable and it is already used more and more in practice. Monitoring and diagnostic systems are on the way to get important tools for modern high voltage units or electrical equipment. With the help of modern monitoring techniques, it is possible to record and process significant parameters which is helpful for diagnostics. The quantity and magnitude of partial discharges (PD) are major quality characteristics in the assessment of high voltage equipment. For the PD measurements, different physical effects can be utilized, such as electrical, optical, acoustic, chemical and high-frequency effects. Therefore, in addition to the conventional PD measurements (according to IEC 60270), depending on the electrical equipment, a multiplicity of different alternative methods are currently being used. At the same time a distinction between on-and off-line measurements is possible. For new high voltage equipment, the direct integration of sensors for PD detection during production is practical as this enables the possibility of on-line measurements and furthermore a permanent operation monitoring. This paper deals with different possibilities for on- and off-line PD measurements in variety of electrical equipment. Moreover, new methods to measure and detect PD and the influence of interferences at on-site measurements are discussed.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"32 1","pages":"400-403"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75296996","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: 34

Water as a Digression Relative to the Dielectric Response in the Frequency Domain for Polymer Composites 水对聚合物复合材料频率域介电响应的影响

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772775

A. Sami, M. Frechette, É. David, S. Savoie

{"title":"Water as a Digression Relative to the Dielectric Response in the Frequency Domain for Polymer Composites","authors":"A. Sami, M. Frechette, É. David, S. Savoie","doi":"10.1109/CEIDP.2008.4772775","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772775","url":null,"abstract":"The presence of water in insulating solids is known to affect the dielectric properties. Although relaxation processes evolved with the excitation frequency and temperature, further characteristics unfold when contaminant with a high dielectric constant, such as water is involved. When the material consists of a microcomposite, and especially in the advent of incorporation of nanofillers, it is speculated that water molecules may intervene in several different manners. In order to investigate further the potential digression caused by water, dielectric spectroscopy was used on prepared composite specimen. Different types of epoxy microcomposites exhibiting a high content of quartz, i.e. 60% wt., were prepared. The effects due to the variation of the water content and presence of nanostructures (nanoclay) on the dielectric response will be discussed. With a weight intake of 0.2% of water, the capacity of the epoxy microcomposite exhibits a slight increase (2%) at lower frequencies and losses are found to increase while a shift towards higher frequencies occurs.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"1 1","pages":"501-504"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74840553","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: 15

Manhole Events Caused by Secondary Cable Insulation Breakdown 电缆绝缘二次击穿引起的人孔事件

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772895

Lily Zhang, S. Boggs, S. Livanos

引用次数: 0

The Characteristics of Winding Temperature for the Natural Ester Filled Transformer up to and Including 500 kVA 500kva及以下天然酯填充变压器绕组温度特性

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772918

Byung-Seol Lee, J. Jeong, C. Park, I. Song

引用次数: 4

Dispersion and Rheology of Poly(ethylene oxide) / MMT Nanocomposites 聚环氧乙烷/ MMT纳米复合材料的分散性和流变性

2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena Pub Date : 2008-10-01 DOI: 10.1109/CEIDP.2008.4772823

M. Reading, A. Vaughan

{"title":"Dispersion and Rheology of Poly(ethylene oxide) / MMT Nanocomposites","authors":"M. Reading, A. Vaughan","doi":"10.1109/CEIDP.2008.4772823","DOIUrl":"https://doi.org/10.1109/CEIDP.2008.4772823","url":null,"abstract":"The topic of nanodielectrics is one that has grown enormously in importance since Lewis first introduced the concept of a nanodielectric in 1994. However, while nanodielectrics exhibit great promise, changes in macroscopic physical properties are determined by dispersion, and therefore it is imperative that reliable methods are available for the cost-effective determination of the dispersion state of the nanofiller in the host polymeric matrix. This paper details an investigation into the rheological response of PEO / montmorillonite (MMT) nanocomposites; MMT is a polar material and is therefore relatively compatible with aqueous systems. Three molecular weight PEOs were used - 100,000 g mol-1, 400,000 g mol-1 and 1,000,000 g mol-1. The rheological behaviour of a range of systems containing various levels of MMT were then studied, with the twin objectives of (a) producing materials with different shear histories and different degrees of MMT dispersion for study as described elsewhere and (b) to explore rheological response as a practical means of determining the dispersion state of a nanofiller in a liquid polymer. This would have great practical utility as a quality control device in, for example, the production of epoxy-based nanodielectrics. In this paper we concentrate on the latter aspect of the work and describe the effect of polymer molar mass, polymer concentration, imposed shear history and nanofiller loading level on the rheological behaviour of the system.","PeriodicalId":6381,"journal":{"name":"2008 Annual Report Conference on Electrical Insulation and Dielectric Phenomena","volume":"190 1","pages":"37-40"},"PeriodicalIF":0.0,"publicationDate":"2008-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76407559","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: 10