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A Study on Mixed Corn Oil with Mineral Oil as Dielectric Component for Power Transformer

The world’s energy requirement has been conquered by petroleum oil for centuries in many applications today. Mineral oil has been used as an electrical insulation and coolant in transformer for over a century due to its properties and insulating features. But, the application of mineral oil in power system equipment is dangerously exposed to the environment which may lead to unwanted accidents during the operation. Due to the concerns of reducing mineral oil usage and its environmental issues, alternatively the solutions to find new sources as a replacement by using the vegetables oil has been investigated. In this paper, the sample of corn and mineral oils is experimented as the samples in the study. Mainly, the aim of this research is to compare the dielectric strength of corn and mineral oils at differently varied ratios. Another objective is to study effect of presence copper particle and aging process to the dielectric strength of insulation oil. This study is referring to IEC60156 guidelines. The results show that the performance of pure vegetable oil without particle is higher compared to mixed vegetable oil. This finding is revealed that the vegetable oil is highly concentrated and the aged oil that included copper as a catalyst may provide a good dielectric strength.