| 摘要 |
Method for evaluation of degree of aging of transformer oil in tanks of power nigh-voltage oil-filled transformers is in fact that one performs oil sampling from tank of transformer with determination of value of characteristics of quality of oil, those are compared to respective limiting values. One determines duration of operation of transformers, average load on transformer, with calculation of oil condition at instant of filling to tank of transformer. One evaluates level of aging of transformer oils through calculation of diagnostic distance between results of measured characteristics and centers of reference trajectories of characteristics that are function of duration of operation, loading of transformer, sort and quality of oil, with change with account of main peculiarities of drift of oil characteristics. To determine degree of aging of oil one performs comparison of diagnostic distances to centers of three nearest trajectories. |
