What does DGA stand for in the context of transformers?

In the context of transformers, DGA refers to Dissolved Gas Analysis. This process is crucial for assessing the health of electrical transformers and involves analyzing the gases that are dissolved in the insulating oil. Over time, various faults can produce different types of gases as byproducts. By measuring the concentration and types of gases present, engineers can diagnose issues such as overheating or arcing within the transformer, providing vital information for maintenance and preventing catastrophic failures.

The other options pertain to different methods or analyses that may be relevant in other fields or contexts but do not specifically relate to the practice of monitoring and diagnosing transformer health through gas analysis.