Method and system for estimating transformer remaining life

摘要

A transformer (26) is monitored by a dissolved gas monitoring device (28). A method (36) in the form of executable code instructs a processor (34) to estimate a remaining life (124) of the transformer. The method includes receiving (126), from the monitoring device (28) data elements (60) representing a current value (134) of dissolved gases (72) in the transformer (26) that correlate with degradation of insulating material in the transformer. Adjustment values (142, 144) are determined for the gases (72) in response to isolated events (160, 162) occurring at the transformer. The current value (134) and the adjustment values (142, 144) are combined to obtain a total value (114), and a degree of polymerization value (116) is estimated using the total value (114). The value (116) is converted into a measure of remaining life (124) of the transformer, and the measure of remaining life (124) is presented to a user (58).

主权项

1. 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.