Azmi, Kiasatina
(2013)
Dielectric Properties Of Mixing Palm Oil With Soybean
Oil As A Potential Insulating Fluid In Transformer.
Masters thesis, Universiti Sains Malaysia.
Abstract
Transformer is one of the most important equipments in electrical power
system. Nearly all high voltage transformers are filled with oil to act as cooling
medium and insulator. Generally, petroleum-based mineral oil is used as transformer
oil. However, due to environmental concern and life-cycle of mineral oil, renewable
resource such as vegetable oil is chosen as the best option to replace this mineral oil.
Past researches have shown that palm oil has equivalent dielectric properties to
substitute the mineral oil as liquid dielectric in electrical power transformer.
However the kinematic viscosity does not fulfill the IEC 60296 standard
requirements and need to be improved. One of the ways is by mixing the palm oil
with soybean oil. So far, there are no reported studies on dielectric properties of
palm oil and soybean oil mixture. Thus, in this project, the investigation on
dielectric properties of RBDPO/RBDSO and RBDP Olein/FR3 mixtures was carried
out. The ratios of soybean oil based products (RBDSO and FR3) in the palm oil
(RBDPO and RBDP Olein) mixtures were limited to 50%. The dielectric properties
of the oil mixture which are dielectric strength, dissipation factor (tan ), relative
permittivity (dielectric constant), kinematic viscosity, water content and chemical
composition analysis have been determined. The effect of mixing ratio and
temperature variances of the oil mixtures to its dielectric properties has been
investigated. The dielectric properties of RBDPO/RBDSO and RBDP Olein/FR3
also have been compared with mineral oil.
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