What is the process of dehydration in wind turbine transformer oil?

The dehydration process for wind turbine transformer oil involves removing moisture from the oil to prevent degradation of its insulating properties. Typically, a vacuum dehydration unit is used, where the oil is heated and passed through a vacuum chamber. The low pressure causes the moisture to evaporate and be extracted from the oil. This process ensures that the oil remains dry, preventing corrosion, oxidation, and other moisture-related issues within the transformer.