Continuous monitoring and interpretation of total Gas Pressure of dissolved Gases in Power Transformers

This paper presents a relatively new method called total gas pressure (TGP) for air ingress type leak detection of the sealed preservation systems in power transformers. Through timely detection of leaks, it is possible to react early and better protect the transformer from excess oxygen, which can increase insulation degradation through oxidation. Since the method has been previously published and presented the basic principles of the method are only shortly reiterated. In short it allows for continuous monitoring of the total sum of partial pressures of all the dissolved gases in the transformer insulating liquid, which results in a pressure value that can be continuously measured in conjunction with other dissolved gas analysis (DGA) by a