Total gas pressure for automated transformer condition assessment
The easiest way to reliably detect air leaks is to monitor the total pressure of all dissolved gases in the oil
Total gas pressure recently emerged as a new method for DGA monitoring, and it is rapidly becoming a useful, and intuitive tool in transformer commissioning and condition assessment. Even the latest IEEE C57.104-2019 standard considers the oxygen-nitrogen ratio in respect to typical values of fault gases found in transformers, which can be estimated by using gas pressure sensors.
The easiest way to reliably detect air leaks is to monitor the total pressure of all dissolved gases in the oil
Vaisala OPT100 DGA monitor uses partial vacuum to extract gases from the transformer oil. Total gas pressure sensor can be used as the addition to the online DGA monitoring. It is a valuable tool for the estimation of the health indexes for automated transformer condition assessment and even operative loading guidance. Besides, Total Gas Pressure gives a direct and intuitive indication on the transformer condition thus enables to select from the standard the most representative reference values for fault gases. Learn more about it by reading the whole article.
Keywords: diagnostics, gas sensor, monitoring, partial pressure, total pressure