Translated Title
Study on insulation condition of power transformer based on the equivalent circuit characteristic parameters
Translated Abstract
The study on the inner relationship between oil paper insulation equivalent circuit parameters and insulation aging mechanism is less and immature,and the relationship between the equivalent circuit parameters and oil paper insulation aging was analyzed in this paper.The influence of the equivalent circuitparameters on oil paper insulation aging of transformer was qualitatively studied.It is found that keyparameter for evaluating insulation condition of power transformers,average relaxation time constant of equivalentcircuit,was almost not affected by the geometry structure of the insulation system.Furthermore,the criterion was obtained to diagnose insulation condition of power transformers by using the average relaxationtime constant of equivalent circuit.Meanwhile,the preliminary quantitative criterion was obtainedby analyzing a lot of examples which were given to verify that the criterion is correct.The analysis resultsshow that the method provides new ideas to diagnose insulation condition of power transformers.
Translated Keyword
average relaxation time constant
equivalent circuit
oil-paper insulation
return voltage
Access Number
WF:perioarticaldjykzxb201706006
