2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)最新文献_第10页

Impact of partial discharges on MV cable dissipation factor varying supply frequency and waveshape 局部放电对中压电缆耗散系数随电源频率和波形变化的影响

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985378

P. Seri, G. Berardi, M. Albertini, S. F. Bononi, J. Haney, K. Tonyali, G. Montanari

引用次数: 1

The Effect of Different Macroscopic Conductivity Equations on Life Estimation of HVDC Cables 不同宏观电导率方程对高压直流电缆寿命估算的影响

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985353

B. Diban, G. Mazzanti

引用次数: 0

A Comparative Study of Blended Ester and Mineral Oil with Variances in Refining Processes 混合酯与矿物油精制工艺差异的比较研究

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985373

Prabhat Kumar Maiti

{"title":"A Comparative Study of Blended Ester and Mineral Oil with Variances in Refining Processes","authors":"Prabhat Kumar Maiti","doi":"10.1109/CEIDP55452.2022.9985373","DOIUrl":"https://doi.org/10.1109/CEIDP55452.2022.9985373","url":null,"abstract":"Transformer oil, made from petroleum, is used all around the world. Due to a lack of petroleum resources, non-biodegradability, and low fire safety, ester-based oil has emerged as the preferred option. Esters are more expensive than mineral oils, and they have lower oxidation stability. A proper blending of ester and mineral oil can be used to alter these parameters. The insulating property of mineral oil is heavily influenced by the source, chemical composition, and refining method. As a result, research into the performance of blended oils of ester and mineral oils with varied characteristics has become necessary. The physicochemical and electrical properties of a mixture of an ester and mineral oils from various refining sources were compared in this study. The experimental study included measurements of tan delta and resistivity at various oil temperatures. Acidity, interfacial tension, pour point, viscosity, oxidation stability, and other characteristics of the oil samples were investigated further. The IEC 60422, IEC 60247, and IEC 61125 guidelines were used to characterize the oil samples for these parameters. The results were compared to mineral oil, which is widely used as an insulating liquid. This study examined the workability of a transformer containing an ester and mineral oil mixture. Based on the comparable results achieved through these experiments, it was found that the presence of ester improved the oxidation stability of blended liquid insulators, irrespective of the quality of MOs.","PeriodicalId":374945,"journal":{"name":"2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126668936","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

Implementation of the Extended Insulation Parameters Method for Physical Interpretation of Diagnostic Measurement Data 诊断测量数据物理解释的扩展绝缘参数法的实现

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985339

A.-C. Uhr-Müller, F. Eppelein, C. Weindl

{"title":"Implementation of the Extended Insulation Parameters Method for Physical Interpretation of Diagnostic Measurement Data","authors":"A.-C. Uhr-Müller, F. Eppelein, C. Weindl","doi":"10.1109/CEIDP55452.2022.9985339","DOIUrl":"https://doi.org/10.1109/CEIDP55452.2022.9985339","url":null,"abstract":"The objective of this paper is to present a novel method to estimate the remaining lifetime of paper insulated lead covered (PILC) cables. It is based on a physical basis and will respect 25 different known diagnostic values. Usually, only certain single parameters, like the dissipation factor, have been used to estimate the condition of the cables up to now. By considering the global insulation system of the PILC cables, a more precise estimation of the ageing factor can be given. The extended insulation parameters (EIP) method involves the application of physical and measurable parameters, such as time constants, base capacitance, conductivity losses, polarization capacitance and losses, etc. These values are measured for new and aged cables and weighted according to their influence on the asset degeneration. Detailed information about the EIP method is given in the article, explaining how the individual parameters affect the degeneration. It also describes the basic principles of the lifetime estimation methods applied for the considered PILC cables.","PeriodicalId":374945,"journal":{"name":"2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127695529","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

An Integrated Hardware-Software System to Identify the Underlying Distribution of PD Pulse Height Records 一种识别PD脉冲高度记录底层分布的集成软硬件系统

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985266

Michael Aguadze, D. Manu, P. Basappa

引用次数: 0

Charge Dissipation Performance of Epoxy Composites Filled With Graphitic Carbon Nitride Nanosheets 石墨化碳纳米片填充环氧复合材料的电荷耗散性能

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985336

Y. Deng, X. Quan, Y. Zhou, Y. Du, L. Tian, X. Bian, S. He, J. Lin

引用次数: 0

Development of the Space Charge Measurement System for High Temperature using MEMS-PZT MEMS-PZT高温空间电荷测量系统的研制

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985346

Miho Kobayashi, Kosuke Sato, H. Miyake, Yasuhiro Tanaka, K. Kanda

引用次数: 0

Simulation of Electrical Field Distribution of HVDC and EHVDC Cable during Load Cycles in Type Test 高压直流和超高压直流电缆型式试验负荷循环过程中的电场分布模拟

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985250

Xiao Gu, Tao Zhu

{"title":"Simulation of Electrical Field Distribution of HVDC and EHVDC Cable during Load Cycles in Type Test","authors":"Xiao Gu, Tao Zhu","doi":"10.1109/CEIDP55452.2022.9985250","DOIUrl":"https://doi.org/10.1109/CEIDP55452.2022.9985250","url":null,"abstract":"Extruded HVDC and EHVDC cable systems are taking a leading role in long distance and off-shore power transmission. Cable systems with higher rated voltages and elevated working temperature are being developed with the rising demand for large transmission capacity. When DC cables are qualified during type test, electrical field distribution inside cable insulation could be critical under certain thermal conditions. The operational thermal limits could be obtained by determining electrical field distribution in the cable. Temperature profiles were taken from load cycle tests of type test of 400 kV and 535 kV DC XLPE cables, respectively. XLPE electrical conductivity parameters were obtained using cable slices. With XLPE conductivity analytically fitted with field and temperature coefficients, the electrical field distribution in the cable insulation under different thermal conditions are investigated by simulation. The simulation results show that a large temperature gradient over the cable insulation can lead to breakdown at insulation screen of the cable during type test, especially for EHVDC cables. The permissible working conditions of DC cable should be determined considering both conductor temperature and temperature gradient. With understanding of electrical field distribution in the cable insulation, thermal conditions during type test can be controlled properly to ensure a successful cable qualification.","PeriodicalId":374945,"journal":{"name":"2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"428 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116723185","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

Effect of BN Nanosheet Orientation on Thermal Conductivity and Insulation Properties of BN/Epoxy Resin Composite BN纳米片取向对BN/环氧树脂复合材料导热性能和绝缘性能的影响

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985280

Shijie Bi, Zhe Li, G. Sheng

{"title":"Effect of BN Nanosheet Orientation on Thermal Conductivity and Insulation Properties of BN/Epoxy Resin Composite","authors":"Shijie Bi, Zhe Li, G. Sheng","doi":"10.1109/CEIDP55452.2022.9985280","DOIUrl":"https://doi.org/10.1109/CEIDP55452.2022.9985280","url":null,"abstract":"Boron nitride (BN) is widely used for the preparation of epoxy resin composites with high thermal conductivity. Substantial increase of thermal conductivity needs high degree of BN concentration, it can lead to difficulty in material preparation and decrease insulation properties. Applying electric field during the curing process can increase orientation degree of BN and improve the thermal conductivity of composites at a lower degree of BN concentration. It is necessary to study the change of BN alignment, thermal conductivity and dielectric properties with different level of electric field strength. In this paper, DC electric field strength applied during the curing process of 25wt% BN/epoxy composite preparation is from 0 to 16.67kV/m. The orientation of BN is determined based on scanning electron microscope (SEM). The effect of the BN orientation on thermal conductivity and insulation properties is studied through thermal conductivity and dielectric spectral testing. With increase of the strength of applied electric field, the direction of BN in the composite is more parallel to the direction of electric field, the thermal conductivity is improved up to 4.1 times than that of pure epoxy, the dielectric constant and electrical conductivity increase. The results of the study show the impact of the electric field through the measurement of the BN alignment, thermal conductivity and insulation properties. The alignment of nano sheet is obvious. the thermal conductivity is higher and insulation properties are better compared with pure epoxy.","PeriodicalId":374945,"journal":{"name":"2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114663263","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

Applicability of Methanol as a Solid Insulation Ageing Indicator in Retrofilled Transformers 甲醇作为固体绝缘老化指示器在回充式变压器中的适用性

2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP) Pub Date : 2022-10-30 DOI: 10.1109/CEIDP55452.2022.9985325

Anupam Dixit, M. Daghrah

{"title":"Applicability of Methanol as a Solid Insulation Ageing Indicator in Retrofilled Transformers","authors":"Anupam Dixit, M. Daghrah","doi":"10.1109/CEIDP55452.2022.9985325","DOIUrl":"https://doi.org/10.1109/CEIDP55452.2022.9985325","url":null,"abstract":"One of the most convenient methods to estimate the condition of the transformer solid insulation is to measure the byproducts in the oil which generate from the solid insulation degradation. Furanic compounds and carbon oxides have been the commonly measured by-products. However, alcohol based by-products such as methanol and ethanol have been emerged as new ageing indicators. The measurement of alcohol based byproducts may be used as a complementary measurement to gain more confidence in the condition assessment of the solid insulation. In this paper applicability of methanol as a solid insulation ageing indicator for retrofilled transformers have been investigated. Retrofilling is simulated using natural ester and synthetic ester liquids in a lab environment. An accelerated ageing experiment is performed at three different temperatures and methanol is measured. 2-furfural (2-FAL) is also measured as a reference for comparison purpose. The results indicate an increase in methanol and 2-FAL contents with increase in temperature. Also, methanol appears very volatile as decrease in methanol contentis observed when the solid insulation degrades more (DP <400) or in insulation system with higher moisture content. Therefore, further investigation of the effect of moisture and solid insulation ageing on the methanol content needs to be done to appropriately use the methanol as a solid insulation ageing indicator.","PeriodicalId":374945,"journal":{"name":"2022 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130410489","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