Substation power transformer risk management: Reflecting On reliability centered maintenance and monitoring

A novel method of decision‐making for power transformer maintenance based on failure‐probability‐analysis

“…Then according to (6), its equivalent operation time after the mth maintenance and k th health state evaluation can be calculated by (7) where t m · k and t m · k refer to the equivalent operation time and the actual time after the mth maintenance and k th health state evaluation, respectively.…”

“…As for the influence of short-term sudden factors, (7) and (9) are synthesized to deduce its regression effect, shown as…”

“…If it is in an advertent, abnormal, or severe condition, its maintenance schedule can be obtained from those guides. Step 4 : If the candidate power transformer is in good condition, use (7), (8), and (9) to calculate the equivalent time considering the short-term sudden factors.…”

“…In order to avoid problems such as over-maintenance and lack of maintenance, the key is to set the maintenance cycle reasonably to formulate a scientific and effective maintenance plan, which has been studied by many authors [4][5][6][7][8]. In Ref.…”

“…[5], a framework for decision making is proposed in the maintenance operation of power transformers considering the current operating conditions and the life of the equipment. In Refs [6] and [7], decisions on condition-based maintenance are discussed from the view of reliability. In Ref.…”