An Evaluation of Transformer Historical Failure Data for Facility Resiliency and Reliability

This paper provides a closer look into transformer failure trends by analyzing data collected from over 160 thousand unit-years of equipment operation. Utilizing an extensive database of failure information compiled by the United States Army Corps of Engineers, this paper looks at year-to-year changes in transformer failure rates to paint a better picture of component reliability. The data show that failure rates trend differently over time, often significantly. A more thorough understanding of equipment failure trends can inform design and operational considerations, ultimately lowering material and operational costs.