Abstract
Recently the wind power was customized to offshore due to more abundant wind than onshore. Transformer is a multi-terminal electrical device that transforms electrical energy and is filled with insulating oil. This study presents the feasibility of diglycerol ester as insulating oil for offshore wind turbine transformers. The sulfated zirconia (SZ) was prepared by the sol-gel method for use on synthesize of diglycerol ester. The diglycerol ester was synthesized with diglycerol and fatty acids over SZ for use on insulating oil of offshore wind turbine transformer. The SZ600 has the highest conversion of fatty acids. The insulation properties of synthesized diglycerol ester over SZ600 shows that the pour point is-50°C and the flash point is 316°C. Therefore, it is suitable for diglycerol ester over SZ600 to be used in offshore wind turbine transformer.
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