US 11,719,760 B2
Probabilistic determination of transformer end of life
Luiz Cheim, Raleigh, NC (US)
Assigned to Hitachi Energy Switzerland AG, Baden (CH)
Filed by HITACHI ENERGY SWITZERLAND AG, Baden (CH)
Filed on Apr. 8, 2020, as Appl. No. 16/843,684.
Prior Publication US 2021/0318391 A1, Oct. 14, 2021
Int. Cl. G01R 31/62 (2020.01); G06F 30/3308 (2020.01); G06F 119/04 (2020.01); G06F 119/08 (2020.01); G06F 111/08 (2020.01)
CPC G01R 31/62 (2020.01) [G06F 30/3308 (2020.01); G06F 2111/08 (2020.01); G06F 2119/04 (2020.01); G06F 2119/08 (2020.01)] 28 Claims
OG exemplary drawing
 
1. A method of generating an expected remaining lifetime of a transformer, comprising:
generating probabilistic models of factors that affect effective aging of the transformer;
generating a plurality of probabilistic profiles of the factors that affect effective aging of the transformer based on the probabilistic models;
generating a plurality of probabilistic hot spot profiles from the plurality of probabilistic profiles and hot spot temperature characteristics of the transformer;
simulating a plurality of future aging scenarios of the transformer based on the probabilistic hot spot profiles; and
estimating an expected remaining lifetime of the transformer from the plurality of future aging scenarios.