The SDIPF reliability curve of old EHV power transformers
A historical review for utilities when developing specifications for new transformers – Part IV
byV. Gurin, T. O’Hanlon
A historical review for utilities when developing specifications for new transformers – Part IV
The further development of UHV and UHV transmission lines and the aging of large power transformers (half of which are over 30 years old) keep the developers of specifications of new transformers working for many years to come.
To help them, a historical overview of the failures of EHV transformers in the 20th century was made in terms of modern Asset Lifecycle theory embedded in the SDIPF curve (Specify – Design – Installation – Potential failure – Failure).
The main causes of accidents were shortcomings in Specify and Design.
The geomagnetic superstorm in March 1989 caused the failure of LPT and EHV transformers in the US electric power industry. The transformers experienced various issues during the storm, such as increased MVAr demand, high levels of combustible gases in oil, and noise.
The article provides a historical review of the events that resulted in the development of improved specifications for new transformers.
#bathtub curve#EHV and UHV power transformer#failure#geomagnetic disturbances#geomagnetically induced current#harmonics#internal insulation#polzuchy razryad#safety margin#SDIPF reliability curve
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