Comparison of dielectric properties of olive oil, mineral oil, and other natural and synthetic ester liquids under AC and lightning impulse stresses

2018 ◽  
Vol 25 (5) ◽  
pp. 1822-1830 ◽  
Author(s):  
Abderrahim Reffas ◽  
Hocine Moulai ◽  
Abderrahmane Beroual
Keyword(s):  
Dielectric Properties ◽  
Olive Oil ◽  
Mineral Oil ◽  
Synthetic Ester ◽  
Lightning Impulse ◽  
Natural And Synthetic

scholarly journals Dielectric properties of natural ester, synthetic ester midel 7131 and mineral oil diala D

2014 ◽  
Vol 21 (2) ◽  
pp. 644-652 ◽  
Author(s):  
Yi Jing ◽  
Igor Timoshkin ◽  
Mark Wilson ◽  
Martin Given ◽  
Scott Macgregor ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Mineral Oil ◽  
Synthetic Ester ◽  
Natural Ester

scholarly journals Investigation of the Lightning Impulse Breakdown Voltage of Mineral Oil based Fe3O4 Nanofluids

Coatings ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 799 ◽  
Author(s):  
Víctor A. Primo ◽  
Belén García ◽  
Juan Carlos Burgos ◽  
Daniel Pérez-Rosa
Keyword(s):  
Dielectric Properties ◽  
Breakdown Voltage ◽  
Mineral Oil ◽  
Power Transformers ◽  
Experimental Conditions ◽  
Insulating Materials ◽  
Recent Interest ◽  
Insulating Liquids ◽  
Lightning Impulse ◽  
Transformer Design

The recent interest in the development of nanomaterials has led researchers to the study of their electrical properties and the applications that they may have as insulating materials. One of these applications is the use of nanofluids as electrical insulation of power transformers. It has been reported that the dielectric properties of insulating liquids in which small amounts of nanoparticles have been dispersed are, in some cases, superior to those of the base fluids. Although these materials are promising, and their application could lead to advantages for the transformer design and reliability in the future, more research is necessary to evaluate different combination of materials under a wider range of experimental conditions. In this paper, a research on the lightning impulse breakdown voltage of mineral oil and several Fe3O4-based nanofluids is presented. Fluids prepared with different concentrations of nanoparticles were subjected to impulse lightning voltages considering both positive and negative polarities. As shown in this work the positive impulse breakdown voltage of the liquids showed improvements of up to 50%; in the case of the negative impulses not significant improvements were obtained.

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