Dissolved gas analysis is one of the most widely used diagnostic tools for detecting and assessing changes to the condition of a liquid-filled transformer, and IEEE and IEC standards provide detailed procedures for interpreting dissolved gases in power transformers.
But there is still a significant number of unplanned outages due to transformer main tank faults that, in retrospect, should be detectable by DGA and maintenance teams are frustrated by pursuing an unreasonable number of false alarms raised by conventional DGA.
You can improve system reliability and avoid false alarms by using Reliability-based DGA, an improved method for interpreting DGA data that associates fault gas production with transformer failures and provides a direct indication of risk that is actionable.