2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)最新文献

Development of a natural ester liquid with significantly enhanced dielectric characteristics 具有显著增强介电特性的天然酯液体的研制

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893132

S. Singha, J. Viertel, M. Unge, J. Karlsson, Kjell Johansson, Håkan Faleke

引用次数: 5

PD occurrence in liquids in ac stressed needle plane gap 液体在交流应力针面间隙中PD的发生

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893092

T. Grav, L. Lundgaard

引用次数: 2

The pre-breakdown solutions by electrohydrodynamic equations for liquid insulators 液体绝缘子电流体动力学方程的预击穿解

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893083

M. Apfelbaum

引用次数: 0

Ecologically acceptable insulating liquids for electrical appliances 电器用环保绝缘液体

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893121

P. Trnka, V. Mentlík, M. Svoboda

引用次数: 8

Thermal aging properties of transformer oil-based TiO2 nanofluids 变压器油基TiO2纳米流体的热老化性能

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893103

Zhifeng Hu, K. Ma, Wei Wang, M. Rafiq, You Zhou, Qi Wang, Yue-fan Du, Cheng-Rong Li, Y. Lv

{"title":"Thermal aging properties of transformer oil-based TiO2 nanofluids","authors":"Zhifeng Hu, K. Ma, Wei Wang, M. Rafiq, You Zhou, Qi Wang, Yue-fan Du, Cheng-Rong Li, Y. Lv","doi":"10.1109/ICDL.2014.6893103","DOIUrl":"https://doi.org/10.1109/ICDL.2014.6893103","url":null,"abstract":"The insulation properties of aged transformer oil-based TiO2 nanofluids were investigated in this paper. Firstly, both pure oil and TiO2 nanofluids were accelerated thermal aged at 130 °C for 36 days. During the accelerated thermal aging process AC (50 Hz) breakdown voltage, lightening impulse breakdown voltage, and partial discharge inception voltage (PDIV) of both samples were measured periodically. The results shows that TiO2 nanofluids possessed better insulation properties than pure oil even though insulation properties of both aged pure oil and nanofluids were decreased during the aging process. After aging for 36 days, the PDIV and AC breakdown strength of nanofluids was 1.1 and 1.4 times as that of pure oil respectively. Possible mechanisms of the phenomenon above were also discussed. In conclusion, the transformer oil-based TiO2 nanofluids process a better anti-aging property than that of pure oil,but the stability of nanofluids need be further improved to bear the complex and extreme condition inside high-voltage level and heavy load transformers in service.","PeriodicalId":6523,"journal":{"name":"2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)","volume":"1 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2014-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79599048","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: 17

Physicochemical and electrical properties of jatropha curcas methyl ester oil as a substitute for mineral oil 麻疯树甲酯油替代矿物油的理化和电学性质

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893089

H. B. H. Sitorus, R. Setiabudy, S. Bismo, A. Beroual

{"title":"Physicochemical and electrical properties of jatropha curcas methyl ester oil as a substitute for mineral oil","authors":"H. B. H. Sitorus, R. Setiabudy, S. Bismo, A. Beroual","doi":"10.1109/ICDL.2014.6893089","DOIUrl":"https://doi.org/10.1109/ICDL.2014.6893089","url":null,"abstract":"This paper reports the investigation of jatropha curcas seeds oil as an alternative option to replace mineral oil in power transformers. This product has several advantages that recommend both its production and usage over that of other vegetable oils as crude palm oil and rape-seeds oil because it may be grown on marginal or degraded soils thus avoiding the need to utilize those more fertile soils currently being used by smallholders to grow their staple crops; and it will readily grow in areas where annual rainfall levels are significantly lower than those required by other species such as oil palm, rape-seeds oil, sunflower oil, soybeans oil, corn oil and others. For instance, these plants can be grown on all soil types in Indonesia, even on barren soil. The barren soil types can be found in many parts of eastern Indonesia that remain untapped because of the difficulty planted with other crops. Moreover, jatropha curcas oil is non-food crops. Jatropha curcas oil is processed by alkali base catalyzed esterification process using potassium hydroxide (KOH) to produce jatropha curcas methyl ester oil (JMEO) that is a product the viscosity and acidity are acceptable for high voltage equipment especially in power transformer. The physicochemical (water content, viscosity, acidity ...) and electrical (dielectric strength) properties of JMEO were measured. For comparison, we also measured breakdown voltage of mineral oil (MO) in the same experimental conditions. The obtained results show that the average AC breakdown voltages of JMEO and MO are too close.","PeriodicalId":6523,"journal":{"name":"2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)","volume":"10 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2014-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88624142","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: 16

Experimental study on the influence of the electric field on free surface waves 电场对自由表面波影响的实验研究

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893102

D. Koulova, C. Louste, H. Romat

引用次数: 5

Positive streamer propagation in small gap of synthetic ester under lightning impulse 雷击作用下合成酯小间隙内正流光的传播

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893076

P. Rózga

引用次数: 1

Dielectric analysis of vegetable and mineral oils 植物油和矿物油的介电分析

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893085

J. Ulrych, M. Svoboda, R. Polanský, J. Pihera

{"title":"Dielectric analysis of vegetable and mineral oils","authors":"J. Ulrych, M. Svoboda, R. Polanský, J. Pihera","doi":"10.1109/ICDL.2014.6893085","DOIUrl":"https://doi.org/10.1109/ICDL.2014.6893085","url":null,"abstract":"This paper deals with analysis and comparison of the specific dielectric properties and chemical structure of sunflower, rapeseed and commonly used transformer mineral oil. The measured sunflower and rapeseed oils are natural ester molecules with a triglyceride structure and have mainly excellent fire resistance and biodegradability. The measured common mineral oil is produced from mixture of hydrocarbons from crude oil and belongs to the group of naphthenic oils consisting mainly of cycloalkanes and is relatively flammable and dangerous for living environment. The measurement was performed by means of the dielectric spectroscopy method. The real and imaginary parts of complex permittivity of measured samples were analyzed in a frequency range from 50 mHz to 100 kHz and in temperature range from -50 °C to +90 °C. The measured spectrums displayed relaxation processes (α and β) as well as the conductive component (σ). The results showed that the measured dielectric properties of the investigated vegetable oils are very similar to each other in the evaluated frequency range, but differs from the common mineral oil properties. The common mineral oil had these properties much better than the sunflower and rapeseed oils. Adapted mixtures of vegetable and mineral oils with suitable inhibitors can be considered to using as an alternative insulation liquid into power transformers instead of mineral oils.","PeriodicalId":6523,"journal":{"name":"2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)","volume":"36 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2014-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76765351","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: 14

Novel cellulose nanomaterials 新型纤维素纳米材料

2014 IEEE 18th International Conference on Dielectric Liquids (ICDL) Pub Date : 2014-09-08 DOI: 10.1109/ICDL.2014.6893152

R. Hollertz, L. Wagberga, C. Pitois

引用次数: 10