2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)最新文献_第5页

Dielectric Response Analysis of Mineral Oil Immersed Transformer, Natural Ester(FR3) Immersed Transformer, and Palm Oil Immersed Transformer 矿物油浸入式变压器、天然酯(FR3)浸入式变压器和棕榈油浸入式变压器的介电响应分析

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796580

S. Maneerot, P. Nimsanong, Jompatara Siriworachanyadee, M. Leelajindakrairerk, K. Jariyanurat, N. Pattanadech

{"title":"Dielectric Response Analysis of Mineral Oil Immersed Transformer, Natural Ester(FR3) Immersed Transformer, and Palm Oil Immersed Transformer","authors":"S. Maneerot, P. Nimsanong, Jompatara Siriworachanyadee, M. Leelajindakrairerk, K. Jariyanurat, N. Pattanadech","doi":"10.1109/ICDL.2019.8796580","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796580","url":null,"abstract":"Currently alternative liquid insulation such as natural ester (FR3) is widely used as distribution transformer insulation because it provides outstandingly dielectric characteristics and natural friendly including highly affordable fire safety. Besides, palm oil is interesting liquid insulation for such transformers because of its distinguish dielectric properties. To analyze the dielectric properties of insulating material, polarization and depolarization current (PDC) measurement is one of the widely accepted non-destructive test technique. This paper presents the dielectric response analysis for the insulation system of a mineral oil immersed transformer, a natural ester (FR3) immersed transformer, and a palm oil immersed transformer by analyzing PDC test results. Three identical single phase transformers with 22kV/460V 30 kVA rated were designed and constructed. The first transformer was fully filled with mineral oil. The second and the third transformer was fully filled with natural ester (FR3) and palm oil respectively. After finishing the construction process, PDC measurement technique was applied for these transformers. The PDC measurement were performed for three case studies as follows: 1) dielectric response for the insulation between high voltage winding and low voltage winding, 2) dielectric response of high voltage winding insulation and low voltage connected to ground 3) dielectric response of high voltage and low voltage winding insulation by which the high voltage lead was connected to the low voltage lead. From the test results, it can be concluded that the dielectric response of the insulation system of the mineral oil immersed transformer was obviously different compared with that of the natural oil (FR3) immersed transformer and the palm oil immersed transformer. Moreover, the PDCs obtained from the tests were also analyzed and reported in this paper.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114341254","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: 3

Analysis of Particle Size Distribution and Other Parameters of Nanoparticles in Natural Ester Oil 天然酯油中纳米颗粒粒径分布及其他参数分析

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796658

P. Totzauer, J. Kúdelčík, J. Hornak, P. Trnka

{"title":"Analysis of Particle Size Distribution and Other Parameters of Nanoparticles in Natural Ester Oil","authors":"P. Totzauer, J. Kúdelčík, J. Hornak, P. Trnka","doi":"10.1109/ICDL.2019.8796658","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796658","url":null,"abstract":"In this article we tackle the main problem of nanoparticles which is aglomeration, sedimentation and their long term stability. It has been proved that the nanoparticles offer various benefits for improving the electrical parameters (like breakdown voltage, dissipation factor tan $delta$, etc.) of insulating liquids. On the other hand the problematics of long term usability of this insulating nano-liquid is not much covered. Our base fluid was one of the natural esters oils - the rapeseed oil which is manufactured localy which can reduce the final price.The importance of nanoparticle surfactants is often misunderstood. Here we present comparison of several surfactant agents with recommendation for further use in combination with natural ester oil based on the chemical structure. The procedure of sample preparation is described in detail. The samples are subject to various measurements of electrical and physical properties with focus on long term usage of these fluids. The dissipation factor was measured in frequency range from 0.001 Hz to 10 kHz which offers the insight into the material behaviour.The analysis of particle size distribution was measured with cooperation with physics department of University of Zilina. The method used for this analysis was acoustic method that determine the PSD (particle size distribution) of the sample and also the attenuation dependence. From these results the FWHM (full width at half maximum) parameters were determined and the nanoparticle distribution was analysed.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115763109","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: 2

DC Breakdown and Space Charge Characteristics of Mineral Oil Impregnated Thermally Upgraded Paper with Different Ageing Conditons 矿物油浸渍热升级纸在不同老化条件下的直流击穿及空间电荷特性

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796784

Runhao Zou, J. Hao, R. Liao

{"title":"DC Breakdown and Space Charge Characteristics of Mineral Oil Impregnated Thermally Upgraded Paper with Different Ageing Conditons","authors":"Runhao Zou, J. Hao, R. Liao","doi":"10.1109/ICDL.2019.8796784","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796784","url":null,"abstract":"Oil-paper insulation is widely used as the insulating material in transformers. Temperature is one of the major factors causing mineral oil-paper insulation system ageing. In order to relieve mineral oil-paper insulation's thermal ageing problem, the thermally upgraded paper is used as the insulation system. In this paper, a thermal ageing experiment had been conducted on the thermally upgraded paper impregnated in mineral oil. Samples were collected on different days, then the space charge characteristic test was performed using pulsed electro acoustic method (PEA method). DC breakdown tests were conducted with and without pre stressing. A ramp test was conducted to determine the space charge injection threshold voltage. From the experiment result, the space charge injection threshold voltages for mineral oil-thermally upgraded paper at each thermal ageing state are attained. Thermal ageing of the insulation will not influence the space charge injection threshold voltage, but with further deterioration, the higher the corresponding voltage will be. The space charge injection for the samples is homo charge injection. The more the deterioration, the easier it becomes for the injection. Thermal ageing does not influence the DC breakdown voltage significantly. Pre stressing will increase samples' DC breakdown field strength. The more the deterioration of the sample, the more apparent the increase will be.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115298078","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

Dielectric droplet on a superhydrophobic substrate in an electric field 电场中超疏水衬底上的介电液滴

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796638

A. Kupershtokh, D. A. Medvedev

引用次数: 1

Diagnosis of transformers based on vibration data 基于振动数据的变压器诊断

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796535

A. Tavakoli, L. D. Maria, D. Bartalesi, S. Garatti, S. Bittanti, B. Valecillos, U. Piovan

引用次数: 3

Streamer Simulation in Nano-Based Dielectric Fluids at Different Fe3O4 Nanoparticle Concentrations 不同Fe3O4纳米颗粒浓度下纳米介电流体的流光模拟

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796558

J. M. Rodríguez-Serna, Ricardo Albarracín‐Sánchez, Juan Velasco, Ricardo Frascella, Víctor A. Primo

{"title":"Streamer Simulation in Nano-Based Dielectric Fluids at Different Fe3O4 Nanoparticle Concentrations","authors":"J. M. Rodríguez-Serna, Ricardo Albarracín‐Sánchez, Juan Velasco, Ricardo Frascella, Víctor A. Primo","doi":"10.1109/ICDL.2019.8796558","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796558","url":null,"abstract":"Nano-based dielectric fluids (NDF) seem to be a good alternative for improving dielectric and thermal characteristics of conventional liquid dielectric systems used in power transformers. Fe3O4 (magnetite) nanoparticles (NP) is one of the most investigated type of NP. Some experiments have shown that with its addition to mineral oil (MO) and ester, increases in breakdown voltage (BV) can be achieved applying both AC and DC voltages. This kind of NP have the advantage that can be handled and synthesized safely and easily using a two-steps method. Besides, streamer propagation can be reduced or avoided introducing Fe3O4 NP in dielectric fluids. These NP act as electronic traps and behave like slow-moving charged particles in the NDF. This behaviour as well as other dielectric characteristics such as resistivity, permittivity and loss tangent, depend on the type, size and concentration of NP. In this work, comparisons and analyses of thermal and dielectric performance of NDF with different Fe3O4 NP concentration are made taking into account the evolution and behaviour of streamers. It has been found that temperature in streamer tip, its length and speed depend on the Fe3O4 NP concentration and the BV is affected because of changes in streamer speed. The most adequate concentration for controlling the streamer has been obtained through simulations and comparisons with experimental results showing good agreement.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125931850","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: 5

Three-Parameter Weibull Distribution Curves for LIBV of Pressboard Samples Impregnated with Natural Ester and Mineral Oil 天然酯和矿物油浸渍纸板样品LIBV的三参数威布尔分布曲线

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796746

Artur Klarecki, P. Rózga

{"title":"Three-Parameter Weibull Distribution Curves for LIBV of Pressboard Samples Impregnated with Natural Ester and Mineral Oil","authors":"Artur Klarecki, P. Rózga","doi":"10.1109/ICDL.2019.8796746","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796746","url":null,"abstract":"The studies presented in this paper were focused on comparative analysis of Weibull distribution curves determined for lightning impulse breakdown voltages of 1 mm thick pressboard samples impregnated with natural ester and mineral oil respectively. The analysis of the results was made using three-parameter Weibull distribution function with location parameter Vo (theoretical zero probability) meaning the threshold value of voltage below which breakdown does not happened. The curves obtained within the studies are in general similar in shape with some benefits in direction of curves connected with pressboard impregnated by natural ester liquid. Quantitatively the difference between the considered cases was found as very small (around 2 kV when comparing the Vo obtained). The reason for this may be the difference in electrical permittivity of pressboard impregnated by ester, which is a little bit higher in comparison with pressboard impregnated by mineral oil. The studies confirmed also that the applied three-parameter Weibull distribution is an excellent statistical tool for determination of threshold electrical strength of liquid-solid insulation systems.","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129767764","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

Time and Space Transition of DC Electric Field Distributions in Oil-Pressboard Composite Insulation in AC/DC Converter Transformer 交直流换流变压器油压板复合绝缘直流电场分布的时空变化

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796800

R. Nakane, K. Kato, N. Hayakawa, H. Okubo

引用次数: 0

Influence Of Pressure In Sealed Tube Ageing Test 压力对密封管老化试验的影响

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796714

J. Malde, Russell Martin, T. Prevost, Bradley A. Greaves

引用次数: 2

AC breakdown performance analysis of SF6/N2 and SF6/CO2 gas mixtures for ring main unit (RMU) switchgear application 环形主机组(RMU)开关柜用SF6/N2和SF6/CO2混合气体交流击穿性能分析

2019 IEEE 20th International Conference on Dielectric Liquids (ICDL) Pub Date : 2019-06-01 DOI: 10.1109/ICDL.2019.8796668

N. F. Ambo, H. Zainuddin, M. S. Kamarudin, J. M. Wari

{"title":"AC breakdown performance analysis of SF6/N2 and SF6/CO2 gas mixtures for ring main unit (RMU) switchgear application","authors":"N. F. Ambo, H. Zainuddin, M. S. Kamarudin, J. M. Wari","doi":"10.1109/ICDL.2019.8796668","DOIUrl":"https://doi.org/10.1109/ICDL.2019.8796668","url":null,"abstract":"In high voltage applications, sulphur hexafluoride (SF<inf>6</inf>) gas has been utilized as the electrical insulation and/or current interrupter due to its strong electronegative properties. However, SF<inf>6</inf> owns unfavorable impact to the environment since it was listed in Kyoto Protocol 1997 as a potent greenhouse gas. As one of the alternatives to minimize the usage of pure SF<inf>6</inf>, the breakdown behavior of SF<inf>6</inf>/N<inf>2</inf> and SF<inf>6</inf>/CO<inf>2</inf> gas mixtures at 10 % SF<inf>6</inf> content are investigated under non-uniform field at pressure level between 0.11 MPa to 0.15 MPa, which focusing for ring main unit (RMU) switchgear application. In this study, the AC breakdown voltage test on both SF<inf>6</inf> gas mixtures were conducted inside a pressure vessel using R6-plane electrode configuration, where the gap distances between the electrode were varied between 5 mm to 30 mm. The results show that the AC breakdown voltage of SF<inf>6</inf>/N<inf>2</inf> and SF<inf>6</inf>/CO<inf>2</inf> at 10 % amount of SF<inf>6</inf> is above 40 % as relatives to pure SF<inf>6</inf>, throughout all gap distances and pressure levels. Moreover, it is also found that the AC breakdown voltage of SF<inf>6</inf>/CO<inf>2</inf> is higher than SF<inf>6</inf>/N<inf>2</inf> when the electrode gap is increased above 15 mm, suggesting the significant role of electrode gap distances in suppressing the breakdown streamer in SF<inf>6</inf>/CO<inf>2</inf>","PeriodicalId":102217,"journal":{"name":"2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126644810","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: 2