Power Transformer Reliability Assurance Program

Abstract Power transformers are vital components in electrical power systems, utilized for varying voltage to the required transmission and distribution levels. These assets are highly valued and susceptible to degradation from regular operations, abnormal conditions, including overloading, harmonics, short circuits, and environmental factors. Ensuring the reliability and fault-free operation of transformers is essential to prevent extensive power system interruptions with potential to disrupt business continuity. This paper details a comprehensive transformer health assessment program implemented at ADNOC GAS - Ruways & Sulphur Division, employing advanced techniques for testing and diagnostics. The main objective of assessing transformer health condition in accordance with international standards such the Institute of Electrical and Electronics Engineers "IEEE", the International Electrotechnical Commission "IEC" and Council on Large Electric Systems "CIGRE" is to establish prioritization criteria for transformer overhaul based on the severity of issues and transformer criticality. This comprehensive approach enhances planning strategies to proactively carry out transformer overhauls to prevent inadvertent failure, reduce downtime, extend transformer lifespan, improve availability and system reliability.