What is the process of degassing of transformer oil in power transformers?

The process of degassing of transformer oil in power transformers involves the removal of dissolved gases, primarily hydrogen and moisture, from the oil. This is typically achieved through a vacuum treatment or by using a degassing unit that heats the oil and reduces pressure, allowing gases to escape. Effective degassing enhances the dielectric strength and thermal conductivity of the transformer oil, thereby improving the overall performance and reliability of the power transformer.