Testing and approval standard development of online dissolved gas analysis monitors for oil‐filled transformers—Part I hydrogen monitors

Abstract

The failure of mineral oil‐filled transformers has been involved in numerous fire and explosion incidents during operations. The power industry has developed online dissolved gas analysis (DGA) monitoring systems capable of diagnosing transformer faults continuously. This study has established new test procedures and pass/fail criteria to evaluate the accuracy of online H₂ monitors, resulting in the creation of a new approval standard.