Prioritizing transformers for condition based asset replacement

Applying transformer health and risk scores allows us to provide a basic asset ranking. Transformer health scores are not, by themselves, an indicator of a transformer problem but they do provide a relatively simple means for scoring large populations of transformers. However the results are not absolute and there is still a need for engineering judgment. Including an indication of consequence allows a risk ranking that is useful to prioritize ´action plans´ for significant risks.This paper discusses strategic transformer replacement if there are units that pose an imminent risk of failure.