Patent ID: 8781756

Claim:
A method for estimating a remaining life of a transformer, said transformer being monitored by a monitoring device, and said method comprising: receiving data elements collected at said monitoring device that characterize a degradation of insulating material in said transformer during operation of said transformer over a period of time, said data elements being received at a processing system from said monitoring device, and said data elements representing a current value of dissolved gases in said transformer that correlate with said degradation of said insulating material in said transformer; determining an adjustment value for said dissolved gases in response to an isolated event occurring at said transformer; combining said current value of said dissolved gases with said adjustment value to obtain a total value of said dissolved gases; estimating a degree of polymerization value using said total value of said dissolved gases; converting said degree of polymerization value into a measure of said remaining life; and presenting said measure of said remaining life to a user, wherein said determining, combining, estimating, converting, and presenting operations are performed by said processing system.